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.

Valencell and Jabra team up to create the most accurate wireless earbud device

Next generation earbuds are going truly wireless to provide accurate and convenient health insights during your workout. Read More...

MesoGlue will not replace solder

MesoGlue is a room temperature metallic glue created with some brilliant science, but it’s not ready to replace solder in the engineering world. Read More...

Smart automotive infrastructures of the future

Smart solar roadways and intersections are infrastructural entities that our future cities will have; here's how they will work. Read More...

Air pressure sensors in smartphones: Transforming navigation and fitness tracking

Barometric pressure sensors are being integrated into smartphones, wearables, IoT devices, and drones. Why measure air pressure? Read More...

Thermocouples: Basic principles and design essentials

It takes carefully designed and implemented circuitry to design a high-accuracy thermocouple interface. The first step is to understand the underlying physics principles of this widely used temperature sensor. Read More...

Meet Bob Adams: Creative and innovative IC designer, inventor, leader, and mentor

Learn about IC designer Bob Adams and his accomplishments, including technical details of his most significant designs. Read More...

A major change in smartphone RF filters and front ends as 5G approaches

The coming carrier aggregation and MIMO designs will be needed to meet the needs of both interim LTE-Advanced and the ultimate arrival of 5G. Smaller and lower cost filters are a necessity in these new systems. Read More...

RC oscillator generates linear triangle wave

This DI describes a novel way to generate a triangle wave. Read More...

Toroid characterization

How do you find an inductor for a switch-mode power supply whose nominal inductance value would be 100 µHy? Read More...

High performance current feedback amplifiers at your service

This article is a good treatment of the very useful, but kind of finicky, current feedback amplifier, especially for high speed application with “pathological slew rates.” Read More...

Electrical engineering in the 1960s: The transistor changed everything

Everything we do today in electronics is based on the transistor, but it wasn't always that way. Here's how one engineer described what happened when transistors came along. Read More...

Taking a look at non-imaging optics

Not every optical device is involved with the art of presenting images. Read More...

More electronics technology designs from 1956

Take a look at another set of electronics developments and ideas from technical/white papers from 1956, when EDN made its debut. Read More...

Trimming a digital-to-analog converter to improve accuracy

In this article, we talk about two different DAC architectures: R2R ladder and string DACs, and analyze techniques that can help to enhance accuracy in both. Read More...

Audio lectures from 1960: High-frequency transistors

Transistors were new to many engineers in 1960, so EDN explained how to use high-frequency transistors in a four-part series using printed pages and phonograph records. You can read and hear the complete series here. Read More...

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...

>> SEE ALL

RC oscillator generates linear triangle wave

This DI describes a novel way to generate a triangle wave. Read More...

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...

>> SEE ALL

CAN transceiver wards off ground potentials

A CAN µModule from Linear Technology, the LTM2889 separates grounds by isolating the CAN transceiver using internal inductive isolation. Read More...

RS-485 receivers occupy tiny footprint

Delivering data rates of 52 Mbps, RS-485/RS-422 receivers in the XR3318x series from Exar come in 3×3-mm, 5-pin or 6-pin TSOT23 packages. Read More...

Valencell and Jabra team up to create the most accurate wireless earbud device

Next generation earbuds are going truly wireless to provide accurate and convenient health insights during your workout. Read More...

RF front-end module outputs +20 dBm

Teamed with a TI CC1310 wireless MCU, the SKY66115-11 front-end-module from Skyworks offers long-range communications from 470 MHz to 510 MHz. Read More...

Rad-hard PLL works up to 5 GHz

Based on Peregrine Semiconductor’s UltraCMOS process, the PE97640 frational-N phase-locked loop targets commercial space applications. Read More...

Analog front-end IC linearizes sensors

A 10-channel temperature-measurement IC, the LTC2986 from Linear Technology directly digitizes thermocouples, RTDs, thermistors, and diodes. Read More...

Isolated gate drivers protect IGBT switches

Gate drivers in the Si828x series from Silicon Labs provide industrial-grade isolation with a dielectric withstand voltage of 5.0 kV RMS. Read More...

Automation platform is highly configurable

The Tibbo Project System (TPS) is an economical automation platform based on Tibbits—miniature blocks that implement specific I/O functions. Read More...

WiFi switches save board space

Skyworks’ SKY13585-679LF SPDT switch and SKY13586-678LF SP3T antenna switch integrate DC blocking capacitors. 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...

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...

>> 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

Smart automotive infrastructures of the future

Smart solar roadways and intersections are infrastructural entities that our future cities will have; here's how they will work. Read More...

Air pressure sensors in smartphones: Transforming navigation and fitness tracking

Barometric pressure sensors are being integrated into smartphones, wearables, IoT devices, and drones. Why measure air pressure? Read More...

Meet Bob Adams: Creative and innovative IC designer, inventor, leader, and mentor

Learn about IC designer Bob Adams and his accomplishments, including technical details of his most significant designs. Read More...

A major change in smartphone RF filters and front ends as 5G approaches

The coming carrier aggregation and MIMO designs will be needed to meet the needs of both interim LTE-Advanced and the ultimate arrival of 5G. Smaller and lower cost filters are a necessity in these new systems. Read More...

High performance current feedback amplifiers at your service

This article is a good treatment of the very useful, but kind of finicky, current feedback amplifier, especially for high speed application with “pathological slew rates.” Read More...

More electronics technology designs from 1956

Take a look at another set of electronics developments and ideas from technical/white papers from 1956, when EDN made its debut. Read More...

Trimming a digital-to-analog converter to improve accuracy

In this article, we talk about two different DAC architectures: R2R ladder and string DACs, and analyze techniques that can help to enhance accuracy in both. 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...

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...

>> SEE ALL

MesoGlue will not replace solder

MesoGlue is a room temperature metallic glue created with some brilliant science, but it’s not ready to replace solder in the engineering world. Read More...

Toroid characterization

How do you find an inductor for a switch-mode power supply whose nominal inductance value would be 100 µHy? Read More...

Taking a look at non-imaging optics

Not every optical device is involved with the art of presenting images. Read More...

Audio lectures from 1960: High-frequency transistors

Transistors were new to many engineers in 1960, so EDN explained how to use high-frequency transistors in a four-part series using printed pages and phonograph records. You can read and hear the complete series here. Read More...

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...

>> SEE ALL

FEATURED RESOURCES