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.

Memories of 1956, the year of EDN’s first issue

To celebrate 60 years of EDN, some great engineers flash back to the era when EDN began to give us an idea of where the industry was and how it’s changed. Read More...

Raw RETMA numbers

RETMA stands for "Radio Electronics Television Manufacturers Association," or a system of standardized numbering of part values based on part values tolerances. Read More...

Understanding RS-485 passive fail-safe biasing

Design successful fail-safe biasing networks with these equations for calculating the resistor values and the maximum possible bus loading caused by transceivers for single and dual fail-safe terminations. Read More...

Let’s clear the air: analog and power management of environmental sensor networks

This overview of a typical environmental sensor network system design for analyzing outdoor air focuses on analog and power management design aspects that can be employed in a smart city or region. Read More...

The homes of EDN

Take a tour of EDN's office locations through the years, including the home of the print collection. Read More...

Monolithic JFETs are alive and well

Circuit design engineers need to look closely at the benefits of using discrete active devices like the Linear Integrated Systems LSJ689 dual, P-channel JFET. Read More...

Using low voltage precision op amps for a high voltage sensing application

Dedicated devices that support extended common mode voltage are generally used for high side current sensing. But dedicated devices have their own limitations. What about when the common mode voltage exceeds 100V? Is it possible to precisely measure a current then? Read More...

Oscilloscopes integrate with education

The TBS2000 oscilloscopes from Tektronix let educators teach directly on the instrument through Wi-Fi, Ethernet, or USB connections. Read More...

6 major electronics technology designs from 1956

In 1956, electrical engineering began giving way to electronics engineering with the advent of the transistor. Here we look at the technology that was evolving at that time, looking at major events and technical papers from that era. Read More...

Celebrating Hans Camenzind’s other achievements

On this fourth anniversary of Hans Camenzind’s passing on August 15, 2012, we highlight some of the other technical achievements he had besides the ubiquitous 555 timer. Read More...

1950s vintage Design Ideas

EDN started publishing in 1956, and the Design Ideas section was there from the beginning. But … with a twist. Read More...

ADI and LTC: Solving the right problems

Analog Devices’ CEO Vincent Roche comments on what the merger with Linear Tech will mean for the industry. Read More...

Designing high-speed analog signal chains from DC-to-wideband

This real system solution example presents an overview on the importance of common mode signals and how to properly level shift the amplifier front end. Read More...

Charge-pump topology doubles voltage, breaks DC path

This unusual charge-pump voltage multiplier Design Idea not only doubles the input, but has a pseudo-floating output. Read More...

10 predictions for the next 60 years in analog electronics

What will the analog electronics world hold for us in 2076? Advances will come in everything from MEMS to optical lasers, thought control, and more. Read More...

Resurrecting a timeless A to D design article from 1977

Read a 1977 design article on getting the most out of low-cost hybrid data converters. Read More...

>> SEE ALL

Iterated-map circuit creates chaos

The chaotic circuit in this Design Idea can generate random numbers, demonstrate chaotic behaviour, and impress friends and colleagues. Read More...

Line receiver provides self test

Use a quad differential comparator to provide adequate self-test for systems using line receivers for differential input signals. Read More...

LTC Design Note: Accurate, fast settling analog voltages from PWM signals

A unique IC mitigates the disadvantages of PWM DACs. Read More...

LTC Design Note: Precision op-amp enables fast multiplexing at low power

A multiplexed DAQ design presents some subtle challenges, and parts selection plays a crucial role. Read More...

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...

>> SEE ALL

Monolithic JFETs are alive and well

Circuit design engineers need to look closely at the benefits of using discrete active devices like the Linear Integrated Systems LSJ689 dual, P-channel JFET. Read More...

Oscilloscopes integrate with education

The TBS2000 oscilloscopes from Tektronix let educators teach directly on the instrument through Wi-Fi, Ethernet, or USB connections. Read More...

RF DAC suits diverse applications

Analog Devices’ AD9164 16-bit, 12-Gsamples/s DAC with on-chip DDS performs direct RF synthesis at 6 Gsamples/s. Read More...

32-bit SAR ADC is fast and accurate

The LTC2508-32 from Linear Technology provides both a 32-bit low-noise, digitally filtered output and a 14-bit, 1-Msample/s no-latency output. Read More...

Combo sensors fit wearable devices

Two combination accelerometer-gyro sensors, the KXG07 and KXG08 from Kionix, a subsidiary of Rohm, provide six axes of motion sensing. Read More...

Ultra-wideband I/Q demodulator improves receiver performance

The Linear Technology LTC5586 high linearity I/Q demodulator has more than 1GHz, –1dB flatness bandwidth, supporting the fast approaching 5G wireless standard. Read More...

36-V instrument amp is rad-tolerant

Intersil’s ISL70617SEH instrumentation amplifier packs an integrated differential ADC driver in its 24-lead ceramic flatpack package. Read More...

High-speed DAC tops DOCSIS 3.1

The AD9162 16-bit, 12-Gsample/s DAC from Analog Devices provides a 2.5-GHz bandwidth that exceeds the DOCSIS 3.1 standard by nearly 40%. Read More...

Fiber-optic modules form versatile transmission system

PFO-100R/T fiber-optic receivers and transmitters from Link Electronics enable 3G/HD/SD-SDI or ASI fiber-optic transmission. Read More...

Isolated amplifier minimizes error

A 7-kV reinforced isolated amplifier, the AMC1301 from Texas Instruments, provides low offset error and drift of ±200 µV at 25°C and ±3 µV/°C. Read More...

Another strong voice chimes in for remote control

Voice control is ever increasing in popularity and the technology is now moving further towards ubiquity with Texas Instrument’s voice remote control solution. Read More...

Tiny motion sensor fits wearable devices

Bosch Sensortec’s BMX160 is a 9-axis motion sensor touted as the smallest in the industry for wearable and augmented/virtual-reality devices. Read More...

Wake up and listen: Vesper quiescent-sensing MEMS device innovation

Vesper claims the industry’s only wake-on sound microphone that enables always on listening capability at practically zero power-draw. Read More...

Resolver-to-digital converter trims board space

A resolver sensor interface, the PGA411-Q1 from Texas Instruments integrates a power supply, exciter amplifier, and safety features. Read More...

I/Q modulator works up to 6 GHz

Powered by a single 2.7-V to 3.6-V supply, the LTC5589 direct conversion I/Q modulator from Linear Technology draws only 29.5 mA of current. Read More...

USB oscilloscopes add waveform generators

TiePie Engineering has added a waveform generator to its line of USB oscilloscopes, which the company claims is a unique design. Read More...

ADC eases analog front-end design

The LTC2311-16 from Linear Technology is a 16-bit, 5-Msample/s SAR ADC with differential inputs and a wide input common-mode range. Read More...

Digital isolators lower component count

Maxim’s MAX14933 and MAX14937 bidirectional isolators transfer signals between circuits with galvanic isolation between two power domains. Read More...

Reference design calculates force and mass

Engineers can evaluate and deploy HMI (human machine interface) devices using the MAXREFDES82# smart force reference design from Maxim. Read More...

Increased support for RF MIMO Systems design and development from MathWorks

MathWorks has made some crucial updates to the RF Toolbox, SimRF, and Antenna Toolbox to aid designers of next generation wireless systems. Read More...

Generate analog and digital signals on the bench

The AWG4162 from Tektronix combines two types of analog outputs with a digital pattern generator. Read More...

Audio line filter vanquishes noise

When inserted in audio lines, TDK’s MAF1608G noise suppression filter for cellular bands keeps the THD+N of the audio signal at 0%. Read More...

Analog Devices RadioVerse technology: Simpler wireless system design

The new ecosystem includes the AD9371 integrated wideband RF transceiver, enabling simple, versatile solutions for wireless infrastructure, aerospace and defense, and instrumentation applications. Read More...

16-V op amps maintain high precision

Comprising four devices, the TSX7 series of 16-V rail-to-rail op amps from STMicroelectronics exhibits an offset voltage of less than 200 µV. Read More...

Silicon Labs timing technology for coherent optical market

The single-chip Si534xH clock family provides a high-performance, frequency flexible timing solution for 100G/400G transceivers. Read More...

Current sensor supplies 1-MHz analog output

Allegro MicroSystems’ ACS730 Hall-effect current sensor provides 1-MHz bandwidth and a fast response time of 210 ns. Read More...

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...

>> SEE ALL

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...

>> SEE ALL

Understanding RS-485 passive fail-safe biasing

Design successful fail-safe biasing networks with these equations for calculating the resistor values and the maximum possible bus loading caused by transceivers for single and dual fail-safe terminations. Read More...

Using low voltage precision op amps for a high voltage sensing application

Dedicated devices that support extended common mode voltage are generally used for high side current sensing. But dedicated devices have their own limitations. What about when the common mode voltage exceeds 100V? Is it possible to precisely measure a current then? Read More...

6 major electronics technology designs from 1956

In 1956, electrical engineering began giving way to electronics engineering with the advent of the transistor. Here we look at the technology that was evolving at that time, looking at major events and technical papers from that era. Read More...

Designing high-speed analog signal chains from DC-to-wideband

This real system solution example presents an overview on the importance of common mode signals and how to properly level shift the amplifier front end. Read More...

10 predictions for the next 60 years in analog electronics

What will the analog electronics world hold for us in 2076? Advances will come in everything from MEMS to optical lasers, thought control, and more. Read More...

Resurrecting a timeless A to D design article from 1977

Read a 1977 design article on getting the most out of low-cost hybrid data converters. Read More...

RF design in the 21st century

To better understand field programmable radio frequency devices, let’s consider how a typical project might run today. Read More...

Intelligent, IO-Link connected sensors underpin the Industrial Internet of Things

This article looks at emerging IO-Link sensor protocol in detail, and shows real-life designs of various IO-Link based sensor systems and how they can be utilized to provide relevant information within a factory automation environment. Read More...

Technologies that make cities smarter and better to live in

A key strategy for a more efficient and sustainable society in metro areas is the smart city concept, which introduces innovative applications in municipalities, utilities, transportation, and public services. Read More...

Vintage electrical measuring instruments from the 1950s

As we celebrate 60 years of EDN, it’s interesting to look back at the equipment from EDN’s early days. Check out Howard Skolnik’s collection of measuring instruments made from 1954-1958. Read More...

>> SEE ALL

Memories of 1956, the year of EDN’s first issue

To celebrate 60 years of EDN, some great engineers flash back to the era when EDN began to give us an idea of where the industry was and how it’s changed. Read More...

Raw RETMA numbers

RETMA stands for "Radio Electronics Television Manufacturers Association," or a system of standardized numbering of part values based on part values tolerances. Read More...

The homes of EDN

Take a tour of EDN's office locations through the years, including the home of the print collection. Read More...

Celebrating Hans Camenzind’s other achievements

On this fourth anniversary of Hans Camenzind’s passing on August 15, 2012, we highlight some of the other technical achievements he had besides the ubiquitous 555 timer. Read More...

1950s vintage Design Ideas

EDN started publishing in 1956, and the Design Ideas section was there from the beginning. But … with a twist. Read More...

ADI and LTC: Solving the right problems

Analog Devices’ CEO Vincent Roche comments on what the merger with Linear Tech will mean for the industry. Read More...

Vacuum tube technology resurrected

On this 60th anniversary of EDN, we look back to 1956 when the vacuum tube was at its maturity and transistors were about to begin their domination. Read More...

Cable shields

Of the different choices that are available for grounding a shield braid that encloses a differential pair of signal wires, please consider that the shield braid be grounded only at the signal source, at the input end, and not at the output end. Read More...

A plea for one connector, one cable, one display

After 40 years of hard work the personal computer is broken, as this quest to display Windows 7 on four monitors attests. Read More...

Y-factor and antenna testing

Typically, this technique would be applied to an RF or microwave amplifier, but it can be applied to antenna testing as well. Read More...

Tube amps and audio goodness

Check out these great audio resources and if you have some favorite tube or vintage audio site, or audio book, let us know. Read More...

>> SEE ALL

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