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Sampling Control for Analog Waveform Analyzer

IP.com Disclosure Number: IPCOM000092434D
Original Publication Date: 1966-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Chittenden, RM: AUTHOR [+2]

Abstract

The arrangement shown in A is for sampling the output of waveshape analysis character recognition systems. A correlation network 5, 7, and 9 is provided with inputs from a delay device such, as a delay line which contains the waveshape to be analyzed. The correlation networks correspond to the characters which are represented by unique waveforms. The outputs of the correlation networks are supplied through amplifiers 11, 13, and 15 to an analog storage arrangement comprising diodes 17, 19, and 21. The latter supply inputs to capacitors 23, 25, and 27.

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Sampling Control for Analog Waveform Analyzer

The arrangement shown in A is for sampling the output of waveshape analysis character recognition systems. A correlation network 5, 7, and 9 is provided with inputs from a delay device such, as a delay line which contains the waveshape to be analyzed. The correlation networks correspond to the characters which are represented by unique waveforms. The outputs of the correlation networks are supplied through amplifiers 11, 13, and 15 to an analog storage arrangement comprising diodes 17, 19, and 21. The latter supply inputs to capacitors 23, 25, and 27.

Switches 29, 31, and 33 are opened during the time period when the character waveform is near its reference position in the delay line. The capacitors are thus allowed to charge to their peak voltage output as determined by the associated correlation network. Switches 35, 37, and 39 are closed just prior to the closing of switches 29, 31, and 33. The former switches are opened at the same time that switches 29, 31, and 33 are closed. The charges upon the associated capacitors are accordingly delivered to a maximum level detector 41. The latter provides an output on the lines 0, 1, and 2, corresponding with the three input networks shown.

The waveform diagram shown in B shows at a the waveform in the delay line as it approaches the reference position. The tracking period that is the time during which the switches 29, 31, and 33 are opened as the waveform approaches the re...