Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1993-12-21
1995-02-07
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 67, 327 72, 327 73, H03K 522, H03F 345
Patent
active
053878299
ABSTRACT:
A signal processing circuit is to be connected to an output stage of a charge-coupled device which includes a reference signal circuit and a CCD signal circuit that generate first and second output signals, respectively. The signal processing circuit includes a differential circuit and first and second amplifiers. The differential circuit receives the first and second output signals from the output stage of the charge-coupled device and generates a first signal corresponding to the first output signal and a second signal corresponding to the second output signal. The first amplifier has an output, a first input which receives the first signal from the differential circuit, and a second input which is connected to the output to serve as a negative feedback input thereto. The second amplifier has an output, a first input which receives the second signal from the differential circuit, and a second input which is connected to the output of the first amplifier to serve as a negative feedback input thereto. The second amplifier amplifies portions of the second signal which differ from the first signal to minimize the effect of noise.
REFERENCES:
patent: 4454435 (1984-06-01), Burns
patent: 5047667 (1991-09-01), Howie
patent: 5057716 (1991-10-01), Kiing
patent: 5182477 (1993-01-01), Yamasaki et al.
Cheng Chern-Chian
Wu Liang-Chung
Callahan Timothy P.
Hualon Microelectronics Corporation
Lam T. T.
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