Design Con 2015

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.

Vote for the Best Products of 2014

At DesignCon 2015, the Best in Design & Test Awards will be awarded in the ChipHead Theater at 5PM on Wednesday January 28th, 2015 in the Santa Clara Convention Center at DesignCon 2015, please cast your vote now! Read More...

Vote for the Engineer of the Year

DesignCon2015 has announced the finalists for the Engineer of the Year Award (sponsored by National Instruments). The award includes a $10,000 grant that will be given out at DesignCon. Read More...

Help save a part of engineering history

The first house to have a telephone is up for sale. You can help turn it into a museum. Read More...

ADC pipeline hardware for multi ADC sampling in safety applications

With the world today moving towards increased safety concerns, automobile technology is trying to match pace by methods which we commonly refer to as “active safety”. The active safety measures are becoming more precise by the day and the subsystems involved are becoming much more complicated. Read More...

Instrumentation amplifier VCM vs. VOUT plots: Part 3

In Part 3 Collin Wells joins me to discuss how to generate custom VCM vs. VOUT plots for an IA by graphing all six modified equations as a function of the IA’s common-mode voltage. Read More...

The myth called "ground"

"Ground" is probably the most misunderstood and misused term in electrical engineering. 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...

Closed-Loop process: The critical role of the analog Input/Output

This article discusses the essential elements of a closed-loop system and focuses on the pivotal roles of the analog-to-digital converter (ADC) and digital-to-analog converter (DAC). Read More...

Temperature-to-Bits converter helps solve challenges in sensor measurement

Although temperature is a fundamental aspect of our lives, it is difficult to measure accurately. Before the era of modern electronics, Galileo invented a rudimentary thermometer capable of detecting temperature changes. Two hundred years later, Seebeck discovered the thermocouple, a device capable of generating a voltage as a function of temperature gradients in dissimilar metals. Read More...

Envelope tracking makes CMOS PAs possible in 4G smartphones

A look at how to improve the efficiency of CMOS PAs using envelope tracking. Product data includes performance testing using products from Nujira and Peregrine Semiconductor. Read More...

Use synchronous detection to make precision, low-level measurements

Synchronous Detection, the principle behind lock-in amplifiers, is a useful technique for extracting signals buried well below the noise floor. This article discusses the frequency domain operations involved in synchronous detection, different circuit implementations of the technique, and the pros and cons of each one. Read More...

Instrumentation amplifier VCM vs. VOUT plots: part 2

In Part 2 we introduce the input common-mode and output swing limitations of operational amplifiers (op amps), which are the fundamental building blocks of IAs. Read More...

Getting the best out of your precision design with Zero-Drift amplifiers, Part 2

Self-correcting or ‘Zero-Drift’ operational amplifiers, as this device group is now commonly labeled, are getting closer and closer to becoming the textbook ideal amplifier block. Read More...

A ‘Swiss Army knife’ of temperature sensing ICs

Linear Technology has just made things simpler for designers with the LTC2983 digital temperature measurement IC that directly digitizes RTDs, thermocouples, thermistors and external diodes with 0.1°C accuracy and 0.001°C resolution. Read More...

Circuit paradoxes – Or are they?

I am sure that at some point all of us have come across puzzling circuit situations that, at first sight, seem to be plain absurd. I want to share some I’ve run into during my student days (usually very late at night). Read More...

Instrumentation amplifier VCM vs VOUT plots: Part 1

For the past few years, I have supported instrumentation amplifiers (IAs) using our TI E2E™ Community forum. The most common issue, by far, is the interpretation of the common-mode versus output voltage, or VCM vs. VOUT data sheet plot. Read More...

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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...

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Software-radio module packs eight analog-input channels

The latest member of the Flexor line of software-radio FMC (FPGA Mezzanine Card) modules from Pentek, the Model 3316 doubles the existing channel density for a single slot, while boosting sample rates through the incorporation of eight 250-MHz, 16-bit ADCs. Read More...

Clock IC employs built-in JESD204B SYSREF generator

In addition to 14 outputs configurable for HSTL or LVDS, Analog Devices’ AD9528 two-stage PLL integrates a JESD204B SYSREF generator to accommodate the clock requirements of LTE and multicarrier GSM base-station designs, defense electronics systems, RF test instrumentation, and other wideband RF GSPS data-acquisition signal chains. Read More...

A ‘Swiss Army knife’ of temperature sensing ICs

Linear Technology has just made things simpler for designers with the LTC2983 digital temperature measurement IC that directly digitizes RTDs, thermocouples, thermistors and external diodes with 0.1°C accuracy and 0.001°C resolution. Read More...

ADC drivers generate little distortion

Two fully differential amplifiers from Texas Instruments, the LMH3401 and LMH5401, bring AC performance to DC-coupled applications, improving performance in radar systems, test and measurement equipment, and wireless base stations. Read More...

Sensor recognizes gestures and barcodes

By integrating five key sensing functions, including gesture detection and barcode emulation, the TMG399x series of optical sensors from ams brings touchless gesture control and display management to smart phones, tablets, and other consumer electronics. Read More...

EDN Hot 100 products of 2014

Of the many thousands of products announced during the past year, these are 100 that especially caught the attention of our editors and our readers. Read More...

EDN Hot 100 products of 2014: Analog

This section of EDN's Hot 100 Products of 2014 features analog ICs including amplifiers, data converters, and others offering significant similar analog functions. Read More...

EDN Hot 100 products of 2014: Wireless & Networking

This section of EDN's Hot 100 Products of 2014 includes communications/networking products for both wired and wireless applications. Read More...

Sigma-delta ADC employs rail-to-rail input buffer

The AD7175-2 sigma-delta ADC from Analog Devices is among the first to offer an integrated true rail-to-rail input buffer, which allows the device to deliver 24 noise-free bits at 20 samples/s and 17.2 noise-free bits at 250 ksamples/s. Read More...

Multichannel AFE ICs improve energy-meter accuracy

Joining Microchip’s MCP391x series of energy-measurement analog front-end (AFE) devices, the MCP3919 and MCP3912 integrate three and four channels of 24bit delta-sigma analog-to-digital conversion, respectively, for single-phase energy meters with neutral monitoring (three-channel) or single-phase, three-wire energy meters (four-channel). Read More...

100 GHz real-time oscilloscope arrives

Teledyne LeCroy ups the oscilloscope bandwidth ante with the announcement of the LabMaster 10-100Zi. Read More...

Chip power inductors suit power circuits of portables

ALPS Green Devices has developed the "GLCLK Series" and "GLCLM Series" Liqualloy Power Inductors, suitable for power supply circuits of displays for smartphones and other compact mobile devices, such as tablets and digital cameras. Read More...

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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 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: 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...

The West Bend No. 1 electric-frying-pan thermostat

Spray lubricant and contact cleaner save a dignified old product. Read More...

>> SEE ALL

ADC pipeline hardware for multi ADC sampling in safety applications

With the world today moving towards increased safety concerns, automobile technology is trying to match pace by methods which we commonly refer to as “active safety”. The active safety measures are becoming more precise by the day and the subsystems involved are becoming much more complicated. Read More...

Instrumentation amplifier VCM vs. VOUT plots: Part 3

In Part 3 Collin Wells joins me to discuss how to generate custom VCM vs. VOUT plots for an IA by graphing all six modified equations as a function of the IA’s common-mode voltage. Read More...

Closed-Loop process: The critical role of the analog Input/Output

This article discusses the essential elements of a closed-loop system and focuses on the pivotal roles of the analog-to-digital converter (ADC) and digital-to-analog converter (DAC). Read More...

Temperature-to-Bits converter helps solve challenges in sensor measurement

Although temperature is a fundamental aspect of our lives, it is difficult to measure accurately. Before the era of modern electronics, Galileo invented a rudimentary thermometer capable of detecting temperature changes. Two hundred years later, Seebeck discovered the thermocouple, a device capable of generating a voltage as a function of temperature gradients in dissimilar metals. Read More...

Use synchronous detection to make precision, low-level measurements

Synchronous Detection, the principle behind lock-in amplifiers, is a useful technique for extracting signals buried well below the noise floor. This article discusses the frequency domain operations involved in synchronous detection, different circuit implementations of the technique, and the pros and cons of each one. Read More...

Instrumentation amplifier VCM vs. VOUT plots: part 2

In Part 2 we introduce the input common-mode and output swing limitations of operational amplifiers (op amps), which are the fundamental building blocks of IAs. Read More...

Getting the best out of your precision design with Zero-Drift amplifiers, Part 2

Self-correcting or ‘Zero-Drift’ operational amplifiers, as this device group is now commonly labeled, are getting closer and closer to becoming the textbook ideal amplifier block. Read More...

Instrumentation amplifier VCM vs VOUT plots: Part 1

For the past few years, I have supported instrumentation amplifiers (IAs) using our TI E2E™ Community forum. The most common issue, by far, is the interpretation of the common-mode versus output voltage, or VCM vs. VOUT data sheet plot. Read More...

Getting the best out of your precision design with Zero-Drift amplifiers, Part 1

Self-correcting or ‘Zero-Drift’ operational amplifiers, as this device group is now commonly labeled, are getting closer and closer to becoming the textbook ideal amplifier block. Read More...

Enhancing Industrial Motor Control Performance Utilizing Digital Isolator Technology

This article will look at the two solutions for isolation requirements, with particular focus on the improved performance in terms of delay timing that magnetic based isolation provides, and the consequent system level benefits that accrue in motor control applications Read More...

>> SEE ALL

Vote for the Engineer of the Year

DesignCon2015 has announced the finalists for the Engineer of the Year Award (sponsored by National Instruments). The award includes a $10,000 grant that will be given out at DesignCon. Read More...

Help save a part of engineering history

The first house to have a telephone is up for sale. You can help turn it into a museum. Read More...

Delighting In Old Stuff

Something fell out of an old cardboard box the other day. It dates from my early days at Sanders Associates in Nashua, NH, but how it got into that old box is anyone's guess. Read More...

Circuit paradoxes – Or are they?

I am sure that at some point all of us have come across puzzling circuit situations that, at first sight, seem to be plain absurd. I want to share some I’ve run into during my student days (usually very late at night). Read More...

Classic oscilloscope front panels show how it's done

Scope front panels can teach us lessons about design and ergonomics. Let's look at some older ones, including the best front panel ever. Read More...

Book review: Controlling Radiated Emissions by Design

This near-classic EMC book, now in its third edition, keeps pace with todays radiated emissions problems using easy-to-understadn examples. Read More...

Breaking news from the MEMS Executive Congress: Advanced Innovation Community (AIC)

MEMS Industry Group (MIG) with support and innovation from inaugural AIC member, Freescale Semiconductor, plan to reduce time-to-market, startup costs, risk and barriers-to-entry by encouraging inputs and collaboration from across the MEMS/sensors supply chain. Read More...

Testing times for design engineers

Characterising subsystems containing high-power devices switching at megahertz/gigahertz frequencies with very fast edges is stretching the capabilities of measurement equipment, and we all have to become test engineers to understand what's inside the box, the sources of errors, and how to use DSOs, VNAs, TDRs and spectrum analysers properly. Read More...

Miller Compensation and the RHPZ

For all its advantages, negative feedback poses a risk, namely, oscillation (this is why the engineering community didn’t immediately embrace this revolutionary concept when Harold Black conceived it, in 1928). Read More...

Eta Kappa Nu Founders Day, October 28

In 1969, at my old alma mater, New York University (NYU), I discovered the Electrical Engineering honor society, Eta Kappa Nu. Read More...

Painless reduction of analog filter noise

They say a low-pass filter will rid you of noise in the higher frequencies, but that is not entirely true. Read More...

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