Electrical Construction & Maintenance

Article 725, Class 2 and 3 Circuits

If the power source is a listed Class 2 transformer or listed Class 2 power supply — or it’s in listed equipment marked to identify the Class 2 power source — you’ve got a Class 2 circuit between the ...
Electronic Design

A Better Transformer Equivalent Circuit

Download this article in PDF format. If you search the internet for “transformer equivalent circuits,” you’ll get five pages of over 100 small circuit diagrams. Figures 1 and 2 show two typical ...
Electrical Construction & Maintenance

Remote Control and Signaling Circuits, Class 1

Courtesy of www.MikeHolt.com. Based on the 2020 NEC. Article 725 of the National Electrical Code (NEC) covers remote-control, signaling, and power-limited circuits that are not integral to a device or ...
Semiconductor Engineering

Transistor Sizing Approach for OTA Circuits Using a Transformer Architecture

A new technical paper titled “Accelerating OTA Circuit Design: Transistor Sizing Based on a Transformer Model and Precomputed Lookup Tables” was published by University Minnesota and Cadence. “Device ...
EDN

Current-sense transformer circuit design for average current-mode control

Here are the steps required to select the transformer and how to design the circuit needed to meet the end use in a manner that prevents transformer saturation Average current-mode control (CMC) ...