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FAQ

Amplifiers: What do rail-to-rail and single supply mean?

October 10, 2017 By Janet Heath

rail-to-rail

With respect to analog signals, a “rail” is a boundary that a signal has to work within. For a long time, operational amplifiers have required opposite but equal voltage supplies. If you see a dual-supply or dual-voltage op amp, it means that two supply voltages power the amplifier; the absolute supply voltage levels are the […]

Filed Under: Analog IC Tips, Analog ICs, FAQ, Featured Tagged With: basics, FAQ

Microcontrollers vs. Microprocessors: What’s the difference?

October 9, 2017 By Scott Thornton

microcontrollers vs microprocessors

Microcontrollers (MCUs) tend to be less expensive than, simpler to set-up, and simpler to operate than microprocessors (MPUs). An MCU can be viewed as a single-chip computer, whereas an MPU has surrounding chips that support various functions like memory, interfaces, and I/O. The MCU vs. MPU question may seem simple, but there are some prominent […]

Filed Under: FAQ, Featured, Microcontroller Tips Tagged With: basics, FAQ

How IBIS models help with signal analysis

October 4, 2017 By Janet Heath

IBIS

An Input Output Buffer Information Specification (IBIS) model is a standard in the semiconductor industry for modeling semiconductor devices from a behavioral perspective, for both analog and digital perspectives. IBIS modeling enables engineers to describe detailed signal behavior in a circuit design without revealing proprietary information about the circuits (or the processes used to make […]

Filed Under: Analog IC Tips, Analog ICs, FAQ, Featured, Tools Tagged With: basics, FAQ, texasinstrumentsinc

Quantifying signal compression

September 25, 2017 By David Herres

The object of signal compression is to facilitate transmission, reception, processing, and the use of great amounts of data while conserving valuable storage space and transmission resources. Data compression is obviously a good approach provided that it doesn’t incur an unacceptable amount of information loss. It was once widely assumed that detail or information, once […]

Filed Under: FAQ, Featured, Test and Measurement Tips Tagged With: FAQ, tektronix

Current feedback amplifiers, Part 2

September 25, 2017 By Bill Schweber

Part 1 of this FAQ look at the operation of the CFB op amp and compared it to the VFB op amp. Part 2 continues the discussion of these two op amp topologies and their characteristics. Q: How do you choose between VFB versus CFB? A: Today’s CFB and VFB amplifiers have comparable performance, but […]

Filed Under: FAQ, Featured, Industry Experts Tagged With: basics, FAQ

Basics of power cords in North America

September 19, 2017 By Lee Teschler

All ac power cords sold in North America must meet a NEMA standard and UL standards that spell out factors such as the minimum wire gage and the connector style. Most cords sold for industrial use, and even many of the cords targeting home appliances, have a third contact in addition to the power and […]

Filed Under: FAQ, Power Electronic Tips Tagged With: basics, FAQ

Choosing a reference voltage for an ADC

September 15, 2017 By Janet Heath

Analog-to-digital converters (ADCs) need a reference voltage (VREF) input in order to operate properly. ADCs convert analog inputs that can vary from zero volts on up to a maximum voltage level that is called the reference voltage. The reference voltage determines the ceiling of what the ADC can convert, and is essentially the yardstick against […]

Filed Under: FAQ, Featured, Industry Experts, Power Electronic Tips Tagged With: basics, FAQ, texasinstrumentsinc

Difference between fixed and floating point

September 15, 2017 By Scott Thornton

Various types of processors (DSPs, MCUs, etc.) have the ability to do math using floating point numbers, but what exactly does this mean? In general, floating point math offers a wider range of numbers and more precision than fixed point math. Knowing the difference, and when to use which type of math can make a […]

Filed Under: FAQ, Featured, Industry Experts, Microcontroller Tips Tagged With: basics, FAQ

Eye and Constellation Diagrams, Pt 2

September 15, 2017 By Bill Schweber

Part 1 looked at the eye diagram, a simple yet powerful visual tool which reveals many specifics about the quality of a recovered bit stream. Part 2 looks at the constellation diagram, another powerful visual tool which is used to show the signal space of complex encoding schemes and relationship among the symbols. Q: Why […]

Filed Under: Analog ICs, FAQ, Featured, Industry Experts Tagged With: basics, EDAboard.com, FAQ

Measuring with spectrum analyzers

September 15, 2017 By David Herres

Modern bench-type and even hand-held oscilloscopes have spectrum analysis capability, providing great added versatility. They can view in rapid succession (or even simultaneously in split-screen format in a mixed-domain instrument) time domain and frequency domain displays of the same signal. Fourier theory tells us that any signal or function in the time domain can be […]

Filed Under: FAQ, Featured, Test and Measurement Tips Tagged With: tektronix

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