Amplification circuit with a determined input impedance and vari

Details Amplification circuit with a determined input impedance and vari Amplification circuit with a determined input impedance and vari

1993-09-03

1996-07-30

Mottola, Steven

Amplifiers

Combined with automatic amplifier disabling switch means

348707, H03F 114

Patent

active

RE0353051

ABSTRACT:
A voltage-current amplification circuit comprises two sub-circuits (B1, B2), each of which comprises a differential amplifier (D), a resistor (R4), a transistor (T), and a first switch (K1) connected between the transistor base and ground. Each sub-circuit (B1, B2) also comprises an additional amplifier (A1, A2), and an additional resistor (R2a, R2b), respectively. The inputs of the additional amplifiers being connected to ground through a common resistor (R) and to the emitters of the two transistors through a common resistor (R1). Each sub-circuit further comprises a second switch (K2) formed by a single transistor.

REFERENCES:
patent: 3681699 (1972-08-01), Kelly et al.
patent: 3729666 (1973-04-01), Kelly
patent: 4104678 (1978-08-01), Van Roessel
Nuclear Instruments and Methods, 37 (1965) 58-60 (North-Holland Publishing Co.), "A Transistorized Linear Gate", E. Elad and S. Rozen, AEC of Israel, Hakirya Tel-Aviv, Israel.

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