Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1993-05-27
1994-09-13
Chilcot, Jr., Richard E.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
250214A, 330 59, 330308, H04B 1006
Patent
active
053473892
ABSTRACT:
An improved optical receiver for an optical signal amplitude modulated with broadband RF signals is described. The optical receiver includes an optical detector which receives the optical signal and generates a radio frequency electrical signal which varies with the intensity level of the incoming optical signal. The electrical signal is applied antiphased from the optical detector to a pair of cascode transimpedance amplifiers which are coupled in a push-pull relationship. The coupling from the optical detector is matched to each of the inputs of the cascode amplifiers. Bias networks are used for each amplifier to maintain the gain stability of the receiver and to provide better output impedance matching to a coaxial cable for CATV distribution. The optical receiver can provide greater output power for the same input power because of the shared bias currents of the cascode stages in each amplifier.
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Chilcot Jr. Richard E.
Negash Kinfe-Michael
Scientific-Atlanta, Inc.
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