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.

Frequency-flexible clock generators for Cloud data centers

Skyrocketing network bandwidth demands driven by consumer mobile devices and cloud-based streaming services, such as Netflix, Hulu, YouTube, Spotify, Pandora, online gaming and others, are pushing Internet Infrastructure suppliers to develop data center systems that support dramatically higher data rates, such as 10G, 40G and 100 Gbps Read More...

Designing JESD204B converter systems for low BER, Part 2

To understand, improve and reduce any impact of the JESD204B link BER on the converter, we answer some common questions from JESD204B system design engineers 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...

Professor wants to change engineering education

Prof. Mark Somerville of Olin College of Engineering explains the culture of engineering education and why it no longer works. Read More...

Single PN temperature sensor executes multiple functions

Here's how, with the addition of one more transistor and a few low-cost components, we can obtain many benefits. Read More...

Designing JESD204B converter systems for low BER, Part 1

With the adoption of the new high speed serial digital interface link, known as JESD204B, between converters and FPGAs, the error rate within the digital transmission line cannot be ignored as a potential contributor to the overall BER. Read More...

Does your op amp oscillate?

We analog designers take great pains to make our amplifiers stable when we design them, but there are many situations that cause them to oscillate in the real world. Read More...

Probes & software enhance impedance measurements

Probes and software from Picotest let you measure the stability of op-amps, filters, and power regulators while in-circuit. Read More...

Load switch with self-resetting circuit breaker

Protect both load and driver with this elegant little Design Idea. Read More...

History of GaN-on-diamond technology

Brief history of the development of the GaN-on-diamond technology that deposits diamond to within hundreds of nanometers of the GaN channel, discussing the current status of the GaN-on-diamond technology, as demonstrated by different players. Read More...

Impedance measurements stabilize op-amp buffers

In-circuit measurements on an op-amp's impedance reveal how to select compensating resistors and capacitors. Read More...

Three paths to a free DAC

Free DACs, free DACs! Almost. Read More...

Antilog converter linearizes carbon dioxide sensor

Simplify gas sensor interface with some analog preprocessing. Read More...

EMI pre-compliance test with a microwave oven?

It makes sense to do some “quick-and-dirty” bench testing to see if you stand a chance of passing EMI compliance testing. Here’s how you can do it with typical lab test equipment and an old microwave oven. Read More...

Guard-bands reduce MOSFET failures in space, part 2

Plots show how radiation affects ON resistance. Part 2 provides test code for selecting the proper guard band. Read More...

>> SEE ALL

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...

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...

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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...

Probes & software enhance impedance measurements

Probes and software from Picotest let you measure the stability of op-amps, filters, and power regulators while in-circuit. Read More...

Smart MEMS mic hears better in loud environments

STMicroelectronics' MP23AB02B MEMS microphone maintains ultra-low distortion at less than 10% up to very high external sound-pressure levels. Read More...

Power supplies combine linear and switching

Autoranging power supplies from Picotest deliver maximum power at any voltage/current setting. Read More...

Ultra-low input bias current amplifier: Do we really need another one?

Do we need another “widget” when everybody and their grandmother makes one of these nowadays? Read More...

Linear Technology 16-Bit, 2.5Gsps DAC, 74dB SFDR

The high-speed digital to analog converter (DAC) is probably one of the most important links in the communications signal chain. Read More...

Audio analyzer claims world's lowest noise

Audio Precision's APx555 bridges the gap between bench and production testing while providing -117 dB of THD+N. Read More...

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...

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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

Frequency-flexible clock generators for Cloud data centers

Skyrocketing network bandwidth demands driven by consumer mobile devices and cloud-based streaming services, such as Netflix, Hulu, YouTube, Spotify, Pandora, online gaming and others, are pushing Internet Infrastructure suppliers to develop data center systems that support dramatically higher data rates, such as 10G, 40G and 100 Gbps Read More...

Designing JESD204B converter systems for low BER, Part 2

To understand, improve and reduce any impact of the JESD204B link BER on the converter, we answer some common questions from JESD204B system design engineers Read More...

Designing JESD204B converter systems for low BER, Part 1

With the adoption of the new high speed serial digital interface link, known as JESD204B, between converters and FPGAs, the error rate within the digital transmission line cannot be ignored as a potential contributor to the overall BER. Read More...

Does your op amp oscillate?

We analog designers take great pains to make our amplifiers stable when we design them, but there are many situations that cause them to oscillate in the real world. Read More...

Temperature measurements and gamma distribution : A perfect wedding

Let’s introduce a method to estimate the errors created by placing the thermocouples in temperature measurement. Read More...

Understanding layers in the JESD204B specification: A high speed ADC perspective, Part 2

Understanding layers in the JESD204B specification: A high speed ADC perspective---the data link and physical layers Read More...

Understanding layers in the JESD204B specification: A high speed ADC perspective, Part 1

In this two-part article, the author will help designers understand how high speed ADCs can properly use and understand how to use to your design advantage the JESD204B standard for the ADC to FPGA interface. Read More...

DSPLL and MultiSynth clock architecture for high-density 10/40/100G line card designs

The insatiable demand for bandwidth to support applications such as video streaming and cloud computing is driving telecom service providers to continuously increase network capacity and migrate to higher speed Internet infrastructure equipment. Read More...

High speed signal generation applications: Critical requirements

In high speed signal generation applications bandwidth and resolution are the critical requirements Read More...

Digital transmission of analog signals through a long distance I2C bus

Buffered I2C buses allow devices to be interconnected beyond their boards Read More...

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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...

DesignCon Awards nominations open

DesignCon’s Best in Design & Test Awards and the DesignCon Engineer of the Year Award recognize the best of the best in engineering and new product advancements at the chip, board, or system level, with a special emphasis on signal integrity and power integrity. Read More...

Impedance measurements stabilize op-amp buffers

In-circuit measurements on an op-amp's impedance reveal how to select compensating resistors and capacitors. Read More...

Three paths to a free DAC

Free DACs, free DACs! Almost. Read More...

Superheterodyne image response

I was listening for weak AM stations, trying to find something interesting, when I came to 1370 kHz on the dial where I heard some music that I liked. Read More...

Guard-bands reduce MOSFET failures in space, part 2

Plots show how radiation affects ON resistance. Part 2 provides test code for selecting the proper guard band. Read More...

Guard-bands reduce MOSFET failures in space, part 1

MOSFETs that go into spacecraft power modules to drive motors need to functions properly after exposure to radiation. Part 1 explains shy guard bands are needed for dice testing. Read More...

Sheet inductance of a cavity: Rule of Thumb #16

Separating power planes by as little as possible is ideal, but maybe not why you think it is. Read More...

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