Amplifiers – With semiconductor amplifying device – Including gain control means
Patent
1995-06-07
1997-02-11
Mottola, Steven J.
Amplifiers
With semiconductor amplifying device
Including gain control means
330308, 330 86, H03F 308
Patent
active
056025114
ABSTRACT:
A Compressing Capacitively Coupled Transimpedance Amplifier (CCTIA) circuit (10) has an amplifier (AMP) with a variable capacitance feedback network (C1, C2, C3, Q1, Q2) coupled between a current receiving amplifier input node and an amplifier output node. The output node outputs a voltage in response to a received current. The variable capacitance feedback network is responsive to the output voltage for establishing one of a plurality of different transimpedance values for the circuit such that the circuit exhibits a greatest transimpedance value for an input current having a magnitude below a threshold magnitude, and a lesser transimpedance value for an input current having a magnitude equal to or above the threshold magnitude.
REFERENCES:
patent: 4786831 (1988-11-01), Morse et al.
patent: 5198660 (1993-03-01), Yokoyama et al.
patent: 5363055 (1994-11-01), Ribner
Denson-Low W. K.
Mottola Steven J.
Santa Barbara Research Center
Schubert W. C.
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