Floating NPN current mirror

Details Floating NPN current mirror Floating NPN current mirror

1981-02-27

1982-12-28

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330288, 323315, H03F 345, G05F 320

Patent

active

043664458

ABSTRACT:
An amplifier circuit is disclosed which utilizes a differential-to-single ended converter having a floating current mirror. The amplifier includes a differential driving circuit having first and second differential output terminals which are respectively connected to first and second current supplies and an output transistor. The current mirror includes a diode-connected transistor having a base-to-emitter junction connected in parallel with the base-to-emitter junction of a further transistor. The base electrode of the diode-connected transistor is connected to one of the differential output terminals and the collector electrode of the further transistor is connected to the other differential output terminal. The emitter electrodes of the diode-connected transistor and of the further transistor are adapted to receive a voltage having a fixed magnitude which enables the transistors of the current mirror to have the same conductivity type as the transistors of the differential driving circuit and the output transistor.

REFERENCES:
patent: 3840819 (1974-10-01), Steckler
patent: 4308496 (1981-12-01), Nagano

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