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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.

Photodiodes and other Light Sensors, Part 2

In this section we shall discuss the interface between a photosensor and its associated electronics. There are really just two photocell applications – light measurement, and the reception of modulated light. Read More...

Automotive Video—The FPD-Link III--Do more with less

This article provides an overview of FPD-Link III, the advances that can be expected in the near future, and how to get even more out of the technology. Read More...

Ternary modulation for Class-D amps (Part 2)

An inherent problem with Class-D amplifiers is the noise generated by the harmonics of the signal. This paper discusses a software-centric noise reduction technique for a single tone which is required when a clean, single frequency is desired when driving an antenna. Read More...

Peregrine flies to Murata

Today, we have news that Peregrine Semiconductor will be purchased by Murata. Here’s a reflection on where they’ve been. 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...

Photodiodes and other Light Sensors, Part 1

This article has been written to answer a number of questions that the author has encountered, as an analog applications engineer, concerning the characteristics of photosensors and photosensor interface circuitry – both for AC and DC applications. Read More...

Linear Technology 92mW direct conversion I/Q modulator

Linear Technology’s latest I/Q modulator is an energy saver for battery-powered transmitters operating in the 30MHz to 1.3GHz frequency bands. Read More...

Transistor and PWM-Switch Analogs

The transistor and the PWM-switch, the core circuit of power converters, have interesting analogs. Both have three terminals, hence three configurations. They are active devices, and each has a key parameter. Read More...

Why are oscilloscope probe amps at the tip?

Placing the amplifier as close to the measurement point as possible minimizes signal losses in the probe and its cable. Read More...

View noisy signals with a stable oscilloscope trigger

Without a stable trigger, oscilloscope displays can become nearly useless for measurements, documentation, and analysis. Read More...

ULP wireless: over-the-air software upgrades

Revising an ultra low power (ULP) wireless chip’s software in the field has been difficult. But new technology will make it routine - to developers’ and consumers’ benefit alike Read More...

Ternary modulation for Class-D amps

An inherent problem with Class-D amplifiers is the noise generated by the harmonics of the signal. This paper discusses a software-centric noise reduction technique for a single tone which is required when a clean, single frequency is desired when driving an antenna. Read More...

Book Excerpt: Sevick’s Transmission Line Transformers, Chapter 9, Part 3

This chapter excerpted from Sevick’s Transmission Line Transformers describes the balun as a subset of transmission line transformers with an in-depth treatment of most used types. Schematics and design /build information details are shown and are well described. Read More...

Bluetooth v4.1: What developers need to know

Here’s how the newest chips can take advantage of the latest version of Bluetooth technology’s new functionality Read More...

Analog online resistance monitoring of resistive power loads, Part 1

In this article, the author proposes an analog online-resistance-monitoring method for resistive power-loads, as a viable alternative to the usual digital approach. After method presentation and discussion, he presents an application example with minimum component count, for assessing the real capabilities of the method. Read More...

Protecting against reverse polarity: Methods examined, Part 2

We now continue with four more Reverse Polarity Protection methods in this Part 2. Read More...

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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...

Three-transistor current source covers wide range

This Design Idea is a two-wire current regulator that strikes a good balance between performance and parts count, and can deal with low voltage & medium to high currents. Read More...

Differential amp has 6dB lower noise, twice the bandwidth

Differential/instrumentation amp topologies possess varying trade-offs. Here’s one that improves noise & BW at the expense of input resistance. Read More...

Exclusively select 1 of N relays

Simple elegance reigns in this 1-of-N selector. Read More...

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Multiband automotive tuner ICs deliver best-in-class radio performance

The Si4790x automotive receiver family scales from economical, single-tuner designs to premium, multi-tuner car radio systems. Read More...

Audio hub codec puts high-quality sound in mobile devices

Wolfson Microelectronics’ latest Audio Hub, the WM8998, offers hi-fi playback and recording to mobile phones and tablets across the product price tiers. Read More...

Linear Technology 92mW direct conversion I/Q modulator

Linear Technology’s latest I/Q modulator is an energy saver for battery-powered transmitters operating in the 30MHz to 1.3GHz frequency bands. Read More...

DAC converts PWM inputs to voltage outputs

Linear Technology’s LTC2645 quad-channel DAC with an integrated 10-ppm/°C reference converts PWM input signals to 12-bit accurate, stable, buffered voltage outputs in less than 8 µs, eliminating the ripple and delay typically associated with analog filters. Read More...

Keithley power supply measures, too

The 2280S Precision Measurement, Low Noise, Programmable DC Power Supplies provide power, measure output current and voltage and, can graph them. Read More...

Low-noise op amps boast wide supply range

The LTC6090 family of precision operational amplifiers from Linear Technology operates over a supply range of ±4.75 V to ±70 V (140 V) and provides a low-frequency noise specification of 3.5 µV pk-pk from 0.1 Hz to 10 Hz. Read More...

DecaWave DWM1000 module: Precise indoor location

Fabless Ireland semiconductor company, DecaWave, announced their first module, DWM1000, based on what the company claims is the industry's most precise indoor location and communication CMOS chip, the DW1000 Read More...

WaveSurfer oscilloscopes land on MAUI

Easy-to-use interface now appears in the Teledyne LeCroy WaveSurfer 3000 series of oscilloscopes. Read More...

Microchip Bluetooth Low Energy smart module

Microchip Technology Inc. announced its first Bluetooth® 4.1 Low Energy module Read More...

PCIe board generates two independent sine waves

Generate signals to 800 MHz, programmed through a GUI, C program, or hardware. Read More...

Maxim Integrated PIXI: How to make a highly functional Field Programmable Analog Array (FPAA)

The Maxim Integrated design team knew the FPAA history and wisely designed a solution that stayed away from all the other supplier designs that failed to live up to their potential. Read More...

Digital pots operate at 36 V

Supporting wide signal swings, these DigiPots also feature high terminal/wiper current support and an extended temperature range. for industrial, automotive and audio applications. 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...

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Photodiodes and other Light Sensors, Part 2

In this section we shall discuss the interface between a photosensor and its associated electronics. There are really just two photocell applications – light measurement, and the reception of modulated light. Read More...

Photodiodes and other Light Sensors, Part 1

This article has been written to answer a number of questions that the author has encountered, as an analog applications engineer, concerning the characteristics of photosensors and photosensor interface circuitry – both for AC and DC applications. Read More...

Book Excerpt: Sevick’s Transmission Line Transformers, Chapter 9, Part 3

This chapter excerpted from Sevick’s Transmission Line Transformers describes the balun as a subset of transmission line transformers with an in-depth treatment of most used types. Schematics and design /build information details are shown and are well described. Read More...

Book Excerpt: Sevick’s Transmission Line Transformers, Chapter 9 Baluns, Part 2

This chapter excerpted from Sevick’s Transmission Line Transformers describes the balun as a subset of transmission line transformers with an in-depth treatment of most used types. Read More...

Autonomous vehicles: Are they ready for road challenges yet?

There are many ongoing developments in software and electronic controls that are very promising to autonomous vehicle safety and ultimate implementation. Let’s take a look at some of these efforts. Read More...

Book Excerpt: Sevick’s Transmission Line Transformers, Chapter 9 Baluns

This chapter excerpted from Sevick’s Transmission Line Transformers describes the balun as a subset of transmission line transformers with an in-depth treatment of most used types. Read More...

An investigation of distortion in a voltage controlled amplifier, Part 1

One of the more common building blocks of a voltage controlled amplifier (VCA) is a differential pair amplifier. Read More...

Book review: Jerry Sevick’s Transmission Line Transformers

The following is a book review of what started out in 1987 as a compilation of research done on wideband transformers for matching vertical antennas to 50 ohm transmission lines. Read More...

Designs of small footprint audio distribution amplifiers, Part 2

Sometimes we may need to distribute audio signals to several rooms in the house or in the office. That is useful when we want to mask external noise or when we wish to create an appropriate environment. Read More...

Designs of small footprint audio distribution amplifiers, Part 1

Sometimes we may need to distribute audio signals to several rooms in the house or in the office. That is useful when we want to mask external noise or when we wish to create an appropriate environment. Read More...

>> SEE ALL

Peregrine flies to Murata

Today, we have news that Peregrine Semiconductor will be purchased by Murata. Here’s a reflection on where they’ve been. Read More...

Transistor and PWM-Switch Analogs

The transistor and the PWM-switch, the core circuit of power converters, have interesting analogs. Both have three terminals, hence three configurations. They are active devices, and each has a key parameter. Read More...

ULP wireless: over-the-air software upgrades

Revising an ultra low power (ULP) wireless chip’s software in the field has been difficult. But new technology will make it routine - to developers’ and consumers’ benefit alike Read More...

LISN Impedance

Line Impedance Stabilization Network or LISN has become a familiar bit of terminology for the kind of circuit that gets put to work in electromagnetic interference (EMI) testing. Read More...

Intro to LTE-Advanced

How do we achieve higher capacity mobile phone performance with the LTE-Advanced (LTE-A) specification from the 3GPP? Read More...

Synth startup looks to the cloud

A team of UK engineers is aiming to create a world-leading audio company making a new generation of cloud-connected music synthesizers. Read More...

Fairchild acquisition of Xsens

I was not too impressed with all the talk I’ve heard but not much action---until now—Learning of the Xsens acquisition significantly reinforces my faith in Fairchild’s MEMS and sensor offerings and is in tune with what they have been promising. Read More...

Power supply oscillation

In a nutshell, the power supply problem was as sketched below. When it was assembled by that first company, it worked okay. When it was assembled by my company's "Manufacturing" people, the power supply oscillated at 10 MHz. Read More...

Test power ICs to survive radiation

In space, power-management ICs can be subjected to radiation. Testing can assure that a part will still function, even if the silicon structure is altered. Read More...

Intro to airborne radar

George Stimson’s Introduction to Airborne Radar is now in its third edition. Here’s a look at how SciTech worked with a team of radar and EW engineers to update the latest version of this venerable text. Read More...

Quick & dirty cable length & impedance measurement

Can't afford a full-blown TDR? Here are a few quick & dirty measurement tips. Read More...

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