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Digital Controller for High Frequency Power Supply

IP.com Disclosure Number: IPCOM000085513D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Calvo, R: AUTHOR [+2]

Abstract

This power supply utilizes digital techniques in its feedback loop and control to take advantage of large-scale integration of digital circuitry.

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Digital Controller for High Frequency Power Supply

This power supply utilizes digital techniques in its feedback loop and control to take advantage of large-scale integration of digital circuitry.

In the illustrated supply, the following functions are performed by the controller blocks:.

Multiplexer 10 allows all incoming signals to share the same analog-to-digital (A-to-D) converter 12. Timing for the multiplexer 10 is derived from the control circuit clock 14.

A-to-D converter 12, by multiplexer of 10, samples the incoming signals (continuous voltage waves) and converts them to a set of time-ordered sequences of numbers, representing points on the input waves at periodic intervals.

Gating circuitry 16 routes each sequence of points into an associated digital filter 18, 20, 22. The output of each digital filter is also a sequence of points; the output sequence would match the sample points at the output of a corresponding continuous filter, had the continuous wave been fed into it. Thus, it is possible to filter "noise" and "unwanted signals" from a numeric representation of a signal, just as though the signal had been passed through an analog filter.

Random-access memory 24 buffers the information from the digital filter bank 25, which is continually changing and must be temporarily stored in a memory for further evaluation.

Read-only storage (ROS) memory 26 contains certain constants such as those representing the desired feedback voltage, the overvoltage and overcurrent threshold poi...