FEEDBACK AMPLIFIERS

MIMO Series-Series Feedback Amplifiers

This brief defines a new type of multiple-input multiple-output (MIMO) amplifier. We present basic structures for this MIMO series–series feedback amplifier (MIMO-SSFA), and the basic design equations. We provide a detailed example showing how this MIMO-SSFA may be used as a transmitting circuit for multiconductor interconnections.

AN-597 Current Feedback Amplifiers

MAPK Cascades as Feedback Amplifiers

Interconvertible enzyme cascades, exemplified by the mitogen activated protein kinase (MAPK) cascade, are a frequent mechanism in signal transduction pathways. There has been much speculation as to the role of these pathways, and how their structure is related to their function. A common conclusion is that the cascades serve to amplify biochemical signals so that a single bound ligand molecule ...

Common Base Transformer Feedback Norton Amplifiers

For about a year I have been experimenting with extremely high intercept amplifiers using 2N5109 bipolar junction transistors (BJTs). These kinds of amplifiers, known as common base transformer feedback (CBTF) amplifiers, and also known as common base noiseless feedback amplifiers, if properly designed and used, offer MW DXers (and SW DXers, though their needs are not as extreme as MW DXers) am...

Class-D Audio Amplifiers with Negative Feedback

There are many different designs for audio amplifiers. Class-D, or switching, amplifiers generate their output signal in the form of a high-frequency square wave of variable duty cycle (ratio of on time to off time). The square-wave nature of the output allows a particularly efficient output stage, with minimal losses. The output is ultimately filtered to remove components of the spectrum above...