Analog

Steve Taranovich
Editor
Latest design tips and clever circuit architectures that analog design engineers must have to keep up with fast-paced developments in the analog world of interface, timing, and RF advancements. Industry innovations and processes that enhance analog performance are some of the many topics to be explored in great technical depth as they happen.

Designing for low-noise feedback control with MEMS gyroscopes

MEMS gyroscopes offer a simple way to measure angular rate of rotation in packages that easily attach to PCBs, so they are a popular choice to serve as the feedback sensing element in many different types of motion control systems. Read More...

SiP package styles for magnetic position sensors have benefits for automotive applications

This article examines the case for using a complete MPOS system produced as a system-in-package, thus relieving the automotive supplier of the need to produce a PCB assembly when implementing magnetic position sensing. Read More...

EDN Exclusive: Meeting the Mars Rover 2020 Design Team at NASA JPL/Caltech

If you think Amazon delivering packages by drones is a challenge—think again: Look at the Mars Curiosity Rover being delivered to the Martian surface. Read More...

Illumination Pattern

How would one find the area of a hypothetical ellipse created by an antenna's emitted RF? Read More...

A case study in electronic design of a home health care monitoring device

This case study involves designing a home health care device that collects data from various personal health monitoring devices and uploads it to a central monitoring station. Read More...

Rethink the button: An inductive-sensing approach

This article covers the fundamentals of ToM technology using an inductance-to-digital converter (LDC) and provides guidance for constructing ToM buttons using metal panels commonly found in applications such as consumer electronics and appliances. Read More...

FFT: Equations and history

Most engineers have used the FFT, but what's behind the signal processing and how did it evolve? Read More...

Former Agilent engineers developing a wireless oscilloscope

Design will use Bluetooth Low Energy to connect to an iPhone or iPad. Read More...

Oscilloscope tricks 21 to 30

Get more out of your oscilloscope than you ever imagined. Read More...

How to design a −130-dB ultra-low distortion data-acquisition system

Achieving the highest performance in a DAS requires attention to noise, filter parameters, the ADC op amp driver, and much more, in addition to the high-performance A/D converter IC itself. Read More...

USB instrument is an entire test bench

The SF880 series from Analog Arts is an oscilloscope, spectrum analyzer, function generator, data logger, frequency meter, logic analyzer, and pattern generator in one unit. Read More...

IC packages and thermal design

Don't be so stuck in the circuits that you forget the importance of IC packages. Read More...

Powering a precision SAR ADC with an efficient, ultra-low power switcher

This article discusses a means of achieving a higher efficiency power solution for your precision SAR ADC by using an ultra-low power switching regulator in a hysteretic mode and analyzing the performance trade-offs. Read More...

The Brooklyn 5G Summit: A must see on April 20-22, 2016

Thanks to IEEE Communications Society and NYU WIRELESS, the IEEE will again be televising the Brooklyn 5G Summit sessions over the Web for free, April 21-22! Read More...

Analog lives in the guitar pedal stomp box

This Electro-harmonix guitar pedal evokes the sound of the B-series Hammond organ, and it's not a digital sampling box. Read More...

The signal to noise ratio at your ears

You will not succeed in getting your message through to someone if the zero decibel signal to noise ratio at your ears is degraded to less than zero decibels by the time your sounds get to their ears. Read More...

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LTC Design Note: Robust high voltage Over-the-Top op-amps maintain high input impedance with inputs driven apart or when powered down

Learn how the innards of an “over-the-top” op-amp work (where inputs can be higher than V+), as well as related design considerations. Read More...

A faster PWM-based DAC

PWM DACs are cheap, cheerful, and slow. But this Design Idea describes a way to speed them up. Read More...

Reduce relay coil current with a reset controller IC

A new twist on reducing power when driving relays and solenoids. Read More...

Control accurate incremental voltage steps with a rotary encoder

This handy little DI circuit affords precise voltage-step control and makes a good pot replacement in many cases. Read More...

Precision programmable current source uses two ICs

Here are some programmable current source Design Ideas which make good use of precision on-chip component matching. Read More...

Programmable-gain amp achieves high gains

Roll your own PGA to get the exact high gains you need. Read More...

Modded charge pump extracts power from digital signal

At first glance, these charge pumps & voltage multiplier/inverters look conventional, but they have a trick up their sleeves. Read More...

Software PLL syncs to line using moving-average filter

A software PLL with a jitter attenuator lends itself to AC-line filtering and many other applications. Read More...

Fast, low-noise JFET amp is stable over temperature

This Design Idea combines the strong points of JFETs and CFAs to make a high-impedance amplifier that’s fast, stable over temperature, and quiet. Read More...

Single-MOSFET circuits gate & modulate

The humble discrete MOSFET shows its versatility in this Design Idea. Read More...

Read multiple switches using ADC

How the author learned to interface 8 switches using zero GPIOs. Read More...

Gain-selectable IC yields voltage-to-current converter

A voltage-to-current converter Design Idea with no discrete components and excellent specs. Read More...

LTC Design Note: Driver for 14-bit, 4.5 MSPS ADC operates over a wide gain range

Assure optimum performance by matching up ADC and input driver. Read More...

Simulate digital filters with PSpice

PSpice isn’t just for analog! This Design Idea shows it can handle digital filter simulation too. Read More...

Instrumentation amp makes an accurate transimpedance amp too

The interesting topology in this Design Idea turns a monolithic in-amp into a good transimpedance amp for photodiode or similar applications. Read More...

Schmitt trigger adapts its own thresholds

If you need to condition a widely-varying signal, a simple Schmitt won’t work, but this DI will. Read More...

Voltage indicator transitions between colours

Using a two-colour LED, this Design Idea indicates power-on and voltage level. Read More...

Linear ramp generator uses one op-amp

Get integrator-like ramps that know when to stop. Read More...

Circuit lets AGC amp hold its gain

AGC amps respond to signal level. This Design Idea allows gain to be held despite a changing level. Read More...

Three-op-amp state-variable filter perfects the notch

There are many variants of the state-variable filter, but this one might just have the best notch output(s). Read More...

Schmitt trigger uses two transistors

Here’s a DI circuit that displays Schmitt-trigger action and can work at high current or voltage. Read More...

Monitor 15 contacts with one PIC input

Take advantage of a microcontroller’s feature set to simplify switch & contact interface. Read More...

Gated oscillator holds last level

Unlike a typical gated oscillator, this one holds its current output level when turned off. Read More...

Optocoupler speed-up also reduces power consumption

Optocouplers tend to be sluggish, unless you have this circuit up your sleeve. Read More...

Add phases to simple RC oscillator

Here’s a simple way to add one or more output phases to an RC oscillator. Read More...

555-based class-D headphone driver makes great practice amp

This class-D audio amp “plays” to the 555’s strengths. Read More...

LTC Design Note: Robust 10MHz reference clock input protection circuit and distributor for RF systems

Design a protected 10MHz reference input without degrading phase noise. Read More...

Avago Tech Note: Isolated current sensing with ∑-∆ optoisolators

Sigma-delta optocouplers make for accurate isolated sensing, and can trade off speed for ENOB. Read More...

Avago Tech Note: Fast analog isolation with linear optocouplers

Implement isolated analog signals and current loops with linear optocouplers. Read More...

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Automotive position sensors are safety-compliant

Magnetic angular position sensors from ams, the AS5170 and AS5171 meet the ISO 26262 functional safety standard for road vehicles. Read More...

Transceivers strengthen Profibus networks

The LTC2876 and LTC2877 RS-485 transceivers from Linear Technology tolerate ±60 V on their bus pins to protect Profibus-DP networks. Read More...

36-V op amps reduce supply-current needs

The dual TSB572 and single TSB611 BiCMOS op amps from STMicroelectronics have a wide supply range and tolerate ESD up to 4 kV HBM. Read More...

Current sensors reject common-mode fields

Allegro’s 5-V ACS724KMA and 3.3-V ACS725KMA ICs perform AC or DC current sensing in systems that require very high-voltage isolation. Read More...

LED controllers are digitally enhanced

Two analog power controllers from Microchip, the MCP19116 and MCP19117 enable intelligent, configurable, and accurate LED lighting. Read More...

Low-jitter clock IC covers wide frequency range

An integer-N PLL with an integrated VCO, the LTC6951 from Linear Technology furnishes multiple clock outputs between 1.95 MHz and 2.7 GHz. Read More...

Multiprotocol transceiver saves board space

Housed in a small QFN package, the LTC2873 transceiver from Linear Technology handles RS-232, RS-85, and RS-422 communications. Read More...

Mixer’s IF bandwidth spans DC to 6 GHz

A double-balanced mixer, the LTC5548 from Linear Technology operates as an up or down converter over a frequency range of 2 GHz to 14 GHz. Read More...

5-V multiplexers are radiation-tolerant

Two analog multiplexers from Intersil, the 16-channel ISL1830SEH and 32-channel ISL71831SEH operate from a single 3-V to 5.5-V supply. Read More...

PLL/VCO combo ICs trim phase noise

Two wideband RF PLLs with integrated VCOs, the LMX2582 and LMX2592 from Texas Instruments, meet the multicarrier wireless GSM standard. Read More...

Power-stingy RF transceiver covers ISM band

Operating between 779 MHz and 965 MHz, the ZL70550 RF transceiver from Microsemi boasts best-in-class low-power characteristics. Read More...

IO-Link transceiver halves power dissipation

With typical driver on-resistance of 2.5 Ω, the MAX14827 IO-Link dual transceiver from Maxim saves more than 50% power dissipation. Read More...

What good is state-of-the-art high-speed electronics without good connectivity?

We often tend to forget about connectors and cables when we discuss the amazing speeds and bandwidths in today’s systems. Read More...

18-bit ADC touts multiplexed inputs

The LTC2335-18 from Linear Technology is an 18-bit, 8-channel SAR ADC with independently configurable input voltage ranges. Read More...

ALD rolls out P-channel version of EPAD MOSFET

Advanced Linear Devices has launched its first P-channel EPAD MOSFET array, the ALD310708, which provides a gate threshold of -0.80 V. Read More...

Analog filters minimize distortion

The D68 series of 8-pole analog filters from Frequency Devices exhibits THD levels as low as -100 dB with near theoretical frequency response. Read More...

eGaN power transistor is small and fast

The EPC2040 eGaN FET from Efficient Power Conversion is intended for applications requiring high-frequency, narrow pulse-width capabilities. Read More...

MathWorks WLAN System Toolbox for MATLAB enables faster and more robust WLAN design

A new toolbox enables designers to explore algorithms, develop WLAN IP, and measure system performance. Read More...

WiFi power amp delivers +22-dBm output

Optimized for 802.11a/n/ac WiFi infrastructure, the Anadigics AWL5911 5-GHz power amplifier provides 33 dB of linear power gain. Read More...

Spectrum monitor hunts down interference

Anritsu’s MS27101A remote spectrum monitor teams with the company’s Vision software to identify interference patterns and geo-locate sources. Read More...

AVX rolls out medical-grade microchip capacitors

The T4C series HRC4000 capacitors from AVX are intended for both implantable, non-life-threatening and non-implantable life-support devices. Read More...

DACs offer integrated EEPROM option

MCP48FEBXX 8-bit, 10-bit, and 12-bit DACs from Microchip provide integrated EEPROM, which enables them to save DAC settings at power-down. Read More...

Status indicator flags five discharge states

Status indicator flags five discharge states Read More...

Low power pedestrian navigation IC works where GPS signals are weak or missing

Announced ahead of CES 2016, the industry’s first coprocessor for wearables provides truly accurate and ultra-low power pedestrian tracking indoors, as well as in urban canyons. Read More...

Conexant takes sound and voice control to the next level

New audio solutions announced at CES 2016 will be important in the growing smart home industry. Read More...

Microchip is first in the world to achieve LoRa Certification

Microchip Technology Inc announced that its RN2483 LoRa wireless module passed the LoRa Alliance’s LoRaWAN Certification Program. Read More...

Tektronix MDO4000 oscilloscopes go multifunction

The MDO4000C covers 200 MHz to 1 GHz, adds a DMM, function generator, logic analyzer, and spectrum analyzer. Read More...

Power adapter employs USB 3.1 Type-C receptacle

A 45-W wall-plug adapter, the PSA45A-200Q from Phihong complies with USB Power Delivery 2.0 specifications, as well as DoE Level VI standards. Read More...

3.3-V CAN transceivers are rad-tolerant

ISL7202xSEH 3.3-V CAN transceivers from Intersil are low-dose-rate tested up to 75 krad for use in satellite and aerospace communications. Read More...

Handheld spectrum analyzer runs all day

The Spectrum Rider FPH from Rohde & Schwarz is designed to run for eight hours on a battery charge. It's lighter weight means you could even last the day holding it. Read More...

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Teardown: Ruggedness and flexibility keep PLCs strong in industrial

A teardown of an Allen-Bradley (Rockwell Automation) Micro850 programmable logic controller, the epitome of rugged industrial control, shows that optocouplers are the go-to technology for reliable isolation, while flexibility and easy programmability using modern languages remains key to PLC’s longevity. Read More...

Teardown: The Engineer’s Mind

For this teardown episode, the recent Mind of the Engineer Study provides a view of your perception of the engineering mind: What you think of you, and what you think others think of you. There are some surprises, some affirmations, and of course some fun twists. Read More...

Teardown: Maxwell's equations

If Maxwell's Equations were a piece of hardware, most of us would be eager to see what's inside the box. But you won't find the literary equivalent of a physical teardown because the subject is basically mathematical and as such, requires a certain amount of rigor to explain and understand. If you're willing to trade mathematical rigor for readability, this article may be the refresher you've been looking for. Read More...

Teardown: The nuances of variable-frequency drives

Get an inside view of induction-motor control by varying frequency using PWM. Read More...

The Scrubbing Bubbles power sprayer

A brilliant design costs you only pennies per spritz. Read More...

The 24V, 300W, BLDC Kollmorgen motor integrated controller

A motor mixes mechanical and electrical beauty with questionable thermal design. Read More...

The Tektronix 1101 oscilloscope-probe power supply

A mechanical design is at once a masterpiece and an expensive expedient. Read More...

Bulldog Security RS82B remote-vehicle-starter system

Microprocessor-controlled relays let you start your car 100 yards away. Read More...

The 15W Fender Squier guitar amplifier

Replacing all of the potentiometers makes a scratchy old amp sound great again. Read More...

The Schauer TB10012 battery charger

A 30-year-old nonworking battery charger makes a perfect Prying Eyes candidate—and gets a new lease on life. Read More...

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Designing for low-noise feedback control with MEMS gyroscopes

MEMS gyroscopes offer a simple way to measure angular rate of rotation in packages that easily attach to PCBs, so they are a popular choice to serve as the feedback sensing element in many different types of motion control systems. Read More...

SiP package styles for magnetic position sensors have benefits for automotive applications

This article examines the case for using a complete MPOS system produced as a system-in-package, thus relieving the automotive supplier of the need to produce a PCB assembly when implementing magnetic position sensing. Read More...

EDN Exclusive: Meeting the Mars Rover 2020 Design Team at NASA JPL/Caltech

If you think Amazon delivering packages by drones is a challenge—think again: Look at the Mars Curiosity Rover being delivered to the Martian surface. Read More...

A case study in electronic design of a home health care monitoring device

This case study involves designing a home health care device that collects data from various personal health monitoring devices and uploads it to a central monitoring station. Read More...

Rethink the button: An inductive-sensing approach

This article covers the fundamentals of ToM technology using an inductance-to-digital converter (LDC) and provides guidance for constructing ToM buttons using metal panels commonly found in applications such as consumer electronics and appliances. Read More...

How to design a −130-dB ultra-low distortion data-acquisition system

Achieving the highest performance in a DAS requires attention to noise, filter parameters, the ADC op amp driver, and much more, in addition to the high-performance A/D converter IC itself. Read More...

Finding a new ribbon microphone angle

One of the more elegant events in engineering is when someone takes an old idea, rethinks it, and brings it back in a new and innovative way. These ribbon microphones use new metals, new designs, and JFETs. Read More...

FIR and IIR digital filter design guide

This excellent tutorial article on digital filter design is a helpful guide for novices as well as seasoned veterans. Read More...

Analog front-end design considerations for RTD ratiometric measurements

Many system designers use Sigma-Delta ADCs together with RTDs for temperature measurements, but have difficulties with achieving the high performance as specified by the datasheet of the ADC they are using. Read More...

Less than one in a Quadrillion: A test method for measuring ADC conversion error rate

For systems that require a low conversion error rate, it takes detailed attention and effort to quantify. When we get done with it, the error rate can be established with high confidence better than 1e-15. Read More...

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IC packages and thermal design

Don't be so stuck in the circuits that you forget the importance of IC packages. Read More...

The Brooklyn 5G Summit: A must see on April 20-22, 2016

Thanks to IEEE Communications Society and NYU WIRELESS, the IEEE will again be televising the Brooklyn 5G Summit sessions over the Web for free, April 21-22! Read More...

Analog lives in the guitar pedal stomp box

This Electro-harmonix guitar pedal evokes the sound of the B-series Hammond organ, and it's not a digital sampling box. Read More...

The signal to noise ratio at your ears

You will not succeed in getting your message through to someone if the zero decibel signal to noise ratio at your ears is degraded to less than zero decibels by the time your sounds get to their ears. Read More...

Poachers beware: The drones are watching

Various methods using science, mathematics, satellites, and drones are being proposed to stop animal poachers, even from far remote locations. Read More...

Fablab reveals the essence of the Millennial masses

I just watched a show called fablab which I believe has the pulse of the Millennial generation. Read More...

Binge work, for better or worse

Are you a binge worker? Do you think it helps or hurts your design productivity and relationships with others? Read More...

The 3-way bulb

Replacing a 3-way bulb in a table lamp causes a mysterious failure. What do you think went wrong? Read More...

5G: The race is picking up pace

Although the target date for 5G demos is 2018, telecom providers are already vying to be the first to have a working 5G cellphone network or at least a network that is far faster than any in existence today. Read More...

Primary colors

Television screens and some outdoor advertisements are constructed as a matrix of picture elements where each consists of a trio of three separate color sources that deliver emissions of what we call the "primary colors." Read More...

The pole

An idealized sketch of a flyback inverter is used to discuss switching elements and polarity. Read More...

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