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Featured

How op amps work and why you should use them, part 2

June 4, 2025 By Bradley Albing

Operational amplifiers (op-amps) are almost the perfect amplifiers. As long as you keep a few important details in mind, they will seem perfect. In part 1, I gave a simplified explanation of how an op amp, functioning as a servo amplifier, amplifies a small signal by comparing it to the attenuated signal from the amplifier’s […]

Filed Under: FAQ, Featured Tagged With: FAQ

How to select automotive PCB-to-wire harness connectors

May 28, 2025 By Aharon Etengoff

An automotive wiring harness routes electrical power and signals between various vehicle components. Within this system, PCB-to-wire harness interfaces use connectors to link discrete wiring bundles with board-mounted electronics. This article explores the fundamentals of PCB-to-wire harness interfaces and outlines connector electrical performance requirements across vehicle platforms. It also highlights the importance of mechanical stability, […]

Filed Under: FAQ, Featured, PCB design Tagged With: FAQ

How does a basic digital-to-analog converter (DAC) perform signal conversion?

May 7, 2025 By Rakesh Kumar

A digital-to-analog converter (DAC) transforms digital binary data into an analog signal using weighted contributions from each bit. In this FAQ, we discuss the two most commonly known ways of DAC conversion: weighted resistor DAC and R-2R ladder DAC. Before getting into the conversion types, let us understand the basic steps involved in a DAC […]

Filed Under: Converters, Data Converters, FAQ, Featured

How op amps work and why you should use them: part 1

April 30, 2025 By Bradley Albing

Operational amplifiers (op amps) may initially look intimidating, but with a bit of study, they can be easily understood and used in a variety of applications. Op amps can be thought of as a perfect amplifier in a black box. When we create a design using an op amp, we initially presume that the device […]

Filed Under: Amplifiers, Audio, audio, FAQ, Featured Tagged With: FAQ

RF directional couplers shrink in size, not performance: part 2

April 23, 2025 By Bill Schweber

This essential measurement accessory for microwaves has morphed from waveguides down to tiny surface-mount components. Part 1 looks at the need for and the basic principles of directional couplers. This part explores some of the construction techniques and implementations. The basic arrangement of a single directional coupler is shown in Figure 1. There are two […]

Filed Under: FAQ, Featured Tagged With: FAQ

FAQ on RF directional couplers: part 1

April 16, 2025 By Bill Schweber

This essential measurement accessory for microwaves has morphed from waveguides down to tiny surface-mount components. Engineers who work with circuits typically use a multimeter as their primary test and measurement tool to check voltages and currents. They may also need to assess power with a separate instrument, but this is often secondary. However, voltage and […]

Filed Under: FAQ, Featured

Understanding ADC specs and architectures: part 1

April 9, 2025 By Rick Nelson

Analog-to-digital converters are the heart of most test equipment, setting the stage for the digital processing of analog signals. Several posts over the past year or so have involved digital signal processing. For example, we have covered the fast Fourier transform (FFT), the inverse FFT, and discrete convolution. To perform these operations on real-world signals, […]

Filed Under: Artificial Intelligence, Data Converters, FAQ, Featured Tagged With: FAQ

Design a circuit for ultra-low power sensor applications

March 26, 2025 By Bradley Albing

Sensors monitoring mechanical and biological systems must often scavenge power from the thing being sensed. The oscillator circuits shown here let you operate those sensors. Sensor circuits that connect to thermocouples, electromagnetic mechanical-to-electrical transducers, and piezoelectric mechanical-to-electrical transducers often use oscillators powered through energy harvesting from solar cells and other sources. These power sources can […]

Filed Under: Amplifiers, FAQ, Featured, Featured Contributions, Inductors, Oscillator, Resistors, Transformers, Wearables

Do I need an analog switch or multiplexer?

March 12, 2025 By Jeff Shepard

If an application calls for a device with multiple inputs and a single output, it needs a multiplexer. A switch can be used if the need is for one input per output. Analog switches and multiplexers are used in a wide array of systems, including industrial, medical, military/aerospace, consumer, 5G infrastructure, and more. This article […]

Filed Under: FAQ, Featured, Switches

What are the different taxonomies of RFID tags, and how do they differ? part 2

March 5, 2025 By Rakesh Kumar

The second part of this FAQ focuses on how RFID tags are categorized based on frequency bands and the presence/absence of microchips in RFID tags. While the classification based on frequency is well known, it helps practicing engineers to know about chipless RFID tags. Types of RFID Tags based on frequency bands Categorizing RFID tags […]

Filed Under: FAQ, Featured, RFID

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Design a circuit for ultra-low power sensor applications

Active baluns bridge the microwave and digital worlds

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