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Peak Amplitude Select and Control Circuit

IP.com Disclosure Number: IPCOM000090685D
Original Publication Date: 1969-Jun-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 27K

IBM

Related People

Kochis, RL: AUTHOR [+2]

Abstract

The circuit selects out voltage peaks in a waveform which has a basic sinusoidal character. The circuit also produces a constant amplitude output of the peaks that it selects. In operation, input waveform A is shifted up in voltage by buffer 10 operating in cooperation with positive clamp 12 to produce waveform B. The latter is the same as waveform A, with a DC voltage added to shift waveform B higher than waveform A. Waveform B is then passed through clipper circuit 14 which clips off the low voltage peaks of waveform B and produces waveform C. Buffer 16 and negative clamp 18 operate in the same manner as buffer 10 and positive clamp 12, except for the opposite polarity. Waveform D is essentially the same as waveform C, except it is shifted down by addition of a negative DC voltage component to waveform C.

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Peak Amplitude Select and Control Circuit

The circuit selects out voltage peaks in a waveform which has a basic sinusoidal character. The circuit also produces a constant amplitude output of the peaks that it selects. In operation, input waveform A is shifted up in voltage by buffer 10 operating in cooperation with positive clamp 12 to produce waveform
B. The latter is the same as waveform A, with a DC voltage added to shift waveform B higher than waveform A. Waveform B is then passed through clipper circuit 14 which clips off the low voltage peaks of waveform B and produces waveform C. Buffer 16 and negative clamp 18 operate in the same manner as buffer 10 and positive clamp 12, except for the opposite polarity. Waveform D is essentially the same as waveform C, except it is shifted down by addition of a negative DC voltage component to waveform C. The high-voltage peaks in waveform D are then clipped by clipper 20 to produce waveform E. To eliminate the DC component from waveform E, such is passed through AC coupling circuit 22 which passes only the AC components of the waveform E to subtractor 24. The resultant signal F can then be subtracted from original signal A by subtractor 24 and yield waveform G. Waveform G consists only of the peaks of waveform A. The peaks have a constant amplitude irrespective of the amplitude of waveform A.

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