Optoelectronic compound switching matrix
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United States of America Patent
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-
Nov 8, 1988
Grant Date -
N/A
app pub date -
Mar 7, 1984
filing date -
Mar 7, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Optoelectronic switching matrix which switches multiplexed input signals to narrowband output lines. Each crosspoint of the matrix is comprised of a heterodyning photosensor, which optically receives the multiplexed input signal and electrically receives a selectable local oscillator signal. The difference frequency can thus be selected to be within the passband of a low pass filter whereby narrowband output signals can be received from the input signals without requiring the use of a demultiplexer.
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