Circuit layout for signal amplification

Details Circuit layout for signal amplification Circuit layout for signal amplification

1986-10-07

1988-05-24

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, H03F 345

Patent

active

047468742

ABSTRACT:
In a circuit layout for signal amplification with the aid of a differential amplifier and signal coupling via a first capacitor, it is proposed, in order to prevent unacceptable operating point displacements into the non-linear area of the amplifier layout in the event of temporarily interfering high-level signals, that one input of the differential amplifier connected to the signal source via the first capacitor be connected via a first resistor, and the other input via a second resistor, jointly via an electronic switch controllable by a comparator, to reference potential. A reference voltage source is connected to one input of the comparator, and the signal source to the other input of the comparator via an RC element, whose time constant is of the same order of magnitude as the time constant formed by the first capacitor and the first resistor.

REFERENCES:
patent: 3872247 (1975-03-01), Saville et al.
patent: 4300102 (1981-11-01), Inoue
patent: 4405901 (1983-09-01), Taguchi et al.
patent: 4464632 (1984-08-01), Yoshihisa et al.
patent: 4527128 (1985-07-01), Bittner
U. Tietze, Ch. Schenk "Halbleiter-Schaltungstechnik", 3, Edition, Springer Verlag Berlin, 1974, pp. 294-295.

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