Amplifier arrangement

Details Amplifier arrangement Amplifier arrangement

1991-08-30

1992-11-10

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330255, H03F 345

Patent

active

051627515

ABSTRACT:
An amplifier circuit includes a driver stage made up of a differential pair and which is coupled to an output stage consisting of a first output transistor and a second output transistor having a common terminal coupled to the output signal terminal of the amplifier circuit. The driver stage provides class AB operation of the output transistors at a comparatively low supply voltage. In order to obtain such operation, a translinear network including the differential pair and a diode-connected transistor is coupled directly to a current mirror which includes the second output transistor. The translinear network and the current mirror dictate the setting of the first and the second output transistor, respectively.

REFERENCES:
patent: 4228404 (1980-10-01), Widlar
patent: 4292584 (1981-09-01), Kusakabe
patent: 4335358 (1982-06-01), Hoeft
patent: 4689580 (1987-08-01), Fukuda et al.
patent: 4714894 (1987-12-01), Gulczynski
patent: 4800339 (1989-01-01), Tanimoto et al.
patent: 5039953 (1991-08-01), Su

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