High output impedance amplifier

Details High output impedance amplifier High output impedance amplifier

1992-07-30

1994-02-08

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330296, H03K 316

Patent

active

052851710

ABSTRACT:
An amplifier arrangement comprises a first transistor (N1) having a control electrode coupled to an input terminal for receiving an input signal (Vin), a first main electrode coupled to a first supply-voltage terminal (2), and having a second main electrode. A second transistor (N2) has a control electrode, a first main electrode coupled to the second main electrode of the first transistor, and a second main electrode coupled to a second supply-voltage terminal (3) by means of a current source (J1). An output terminal supplies an output signal (Vout). An amplifier (N4, N5) has an inverting input (V1) coupled to the second main electrode of the first transistor, and an output (V0) coupled to the control electrode of the second transistor. An apparatus (N3, N6, N7, N8, P1, P2, P3, P4) is provided for correcting a first potential on the second main electrode of the first transistor depending upon a second potential on the control electrode of the first transistor in a manner such that the first transistor is operated at a desired point of saturation.

REFERENCES:
patent: 4697153 (1987-09-01), Lish
patent: 5039954 (1991-08-01), Bult et al.

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