EDN

Inside the analog modulator – Part 5 of an introduction to analog circuit design

At the heart of the control scheme of a classic switching regulator is the analog modulator, of which one typical implementation is shown in Figure 21. The analog modulator is essentially a comparator ...
Electronic Design

Design Balanced Op-Amp Circuits For Performance And Simplicity

In a balanced op-amp circuit, the op-amp inputs see equal impedances looking into the circuit. Balanced circuits provide better performance by cancelling some input errors and have a simple R F /R I ...
EDN

Compact, four-quadrant lock-in amplifier generates two analog outputs

The circuit in this Design Idea realizes a simple, low-cost lock-in amplifier employing an Analog Devices AD630 balanced modulator-demodulator IC (Reference 1). The device uses laser-trimmed thin-film ...
Semiconductor Engineering

3-to-1 Reconfigurable Analog Signal Modulation Circuit On A Single Device

A new technical paper titled “Three-to-one analog signal modulation with a single back-bias-controlled reconfigurable transistor” was published by researchers at NaMLab gGmbH, GlobalFoundries, and TU ...
Electronic Design

My Favorite Modulator Only Needs Leftover Components

I’ve spent a lot of my career building analog-to-digital converters (ADCs) from whatever bits of stuff I can find lying around. In many cases, someone has decided that an analog signal needs to be ...