Low 1/f noise amplifier for CCD imagers

Details Low 1/f noise amplifier for CCD imagers Low 1/f noise amplifier for CCD imagers

1987-09-24

1989-03-21

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307355, 307279, 307263, 307443, 330253, 377 63, H03K 522, H03K 1716

Patent

active

048146480

ABSTRACT:
A low 1/f noise amplifier has been provided for an output of a CCD imager. To reduce clock noise, the amplifier employs a differential detection scheme. Linear stages (54, 76) are coupled by capacitors (60, 82) to a differential amplifier (64). Differential amplifier (64) employs a first (112, 118) and a second (172, 198) differential transistor pair. The second differential pair (172, 198) is cross-coupled to the outputs of the first differential pair (112, 118) by load resistances (180, 206) with the voltage drop across them remaining substantially constant. To maintain stability, the positive and negative branches of the amplifier are periodically reset by a resetter (210). The input nodes (62, 86) are periodically reset to a voltage reference.

REFERENCES:
patent: 4007381 (1977-02-01), Moshen
patent: 4075514 (1978-02-01), Sequin
patent: 4223234 (1980-09-01), Levine
patent: 4644287 (1987-02-01), Levine
Weste et al., "MOST Amp for Performing . . . Functions", Electronic Circuits and Systems, Sep. 1977, vol. 1, No. 5, pp. 165-172.

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