Chapter 11

Implementing Digital Feedback

Alex Krasner

Abstract

Developing digital controllers requires the designer to assess both the analog circuitry around the controller and the digital logic within the controller. When implementing a digital controller, there are no limitations on how to interface the analog environment with the digital logic. Several main concerns must be addressed for proper integration. First, supplying DC power rails to the controller and providing local digital and analog grounds to limit noise and ground loops. Second, signal conditioning and data acquisition via analog-to-digital converters. This includes adequate filtering, buffering, and scaling of analog signals so that they can be accurately quantized without aliasing ...

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