EDN

Accurately predict measured noise figures for transformer coupled differential amplifiers (Part 1 of 2)

Using a transformer coupled differential inverting amplifier stage can give a very low input referred noise voltage or Noise Figure (NF) with exceptional SFDR/mW. The NF equation needs to include ...
EDN

Improved Noise Figure Using an FDA and Input Transformer

It is well known that combining a transformer with various types of amplifiers can improve the dynamic range. This works particularly well driving into the inverting side of either a differential dual ...
Electronic Design

Simple Amplifier Options Improve Dynamic Range in ADC Interfaces

Members can download this article in PDF format. In designing an input stage for an analog-to-digital converter (ADC), engineers choose a particular amplifier, assign a target gain, and note the ...
Electronic Design

What’s All This Varactor-Input Amplifier Stuff, Anyway?

This file type includes high-resolution graphics and schematics when applicable. 1. Bob Pease built this varactor-input op-amp out of discrete components, based on an old design of Jim Williams. A ...