Differential sampling circuit for improving signal to noise ratio in an electronic organ having multiplexed keying
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United States of America Patent
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Oct 9, 1984
Grant Date -
N/A
app pub date -
Jun 17, 1983
filing date -
Jun 17, 1983
priority date (Note) -
Expired
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Abstract
The present invention is a differential sampling circuit for improving the signal to noise ratio by eliminating d.c. level distortion in square wave signals used as components for forming a stairstep or bright wave signal in an electronic organ having multiplexed keying. The multiplexed drawbar signals for even footages at both sides of a sampling resistor are demultiplexed, applied to a sample and hold circuit and applied as inputs to a differential amplifier to cancel any fluctuations of the d.c. signal component.
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