Analog signal storage using recirculating CCD shift register wit

Details Analog signal storage using recirculating CCD shift register wit Analog signal storage using recirculating CCD shift register wit

1975-11-17

1976-12-21

Hecker, Stuart H.

Communications: electrical

Digital comparator systems

307221D, G11C 1918, G11C 2100, G11C 2700

Patent

active

039991717

ABSTRACT:
An analog signal storage system wherein degenerate analog signal storage devices may be used for relatively long time analog data storage. A recirculating charge transfer device shift register is used to store the analog data and a variable gain amplifier is included in a recirculation path between the shift register output and input. The gain of this amplifier is periodically adjusted so as to maintain the overall loop gain of the system at unity. The gain control signal is produced by comparing the amplitudes of a reference signal pulse before and after propagation through the shift register. Based on this comparison, a control signal is generated and applied to adjust the gain of the variable gain amplifier in a sense tending to compensate for signal loss due to propagation through the shift register. The output of the shift register may be strobed to read out analog signal data for external utilization at a lower rate than the propagation rate through the shift register.

REFERENCES:
patent: 3931510 (1976-01-01), Kmetz

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