Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1990-10-31
1992-03-31
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330267, H03F 326
Patent
active
051011743
ABSTRACT:
A charge detection amplifier embodying the invention comprises a first amplification stage (Q10-Q15) coupled to an input terminal 70 and having an output node 72. Capacitive feedback is provided by a capacitor 82 coupled between an input node 71 and said output node 72. The operating bias point of said first amplification stage is set by a first balance circuit (Q16/Q17) coupled between said output node 72 and two internal nodes 74,76 of said first amplification stage, the magnitude of said coupling being controlled by a voltage applied to a first balance circuit input terminal 84. A first buffer stage 200 is provided to couple said output node 72 to a circuit output terminal 92 and to provide adequate current to drive an external load connected to said output terminal 92. A reset switch (Q24/Q25) is provided to short circuit said capacitor 82 in response to a signal applied to a reset terminal 104.
REFERENCES:
patent: 3983413 (1976-09-01), Gunsager et al.
patent: 4007381 (1977-02-01), Mahsen
patent: 4814648 (1989-03-01), Hynecek
Barndt B. Peter
Donaldson Richard
Hiller William E.
Mottola Steven
Texas Instruments Incorporated
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