Monolithic amplifier having a balanced, double-to-single ended c

Details Monolithic amplifier having a balanced, double-to-single ended c Monolithic amplifier having a balanced, double-to-single ended c

1975-11-13

1977-06-14

Rolinec, Rudolph V.

Amplifiers

Signal feedback

Combined with control of bias voltage of signal amplifier

330 17, 330 69, H03F 345

Patent

active

040300447

ABSTRACT:
The amplifier configuration includes a double-to-single ended converter having two interconnected portions, each having three signal paths. Two of the signal paths include transistors of a first conductivity type having main electrodes coupled between one of the output terminals of a differential amplifier and a power supply conductor. The other path includes a transistor of the second conductivity type having a control electrode coupled to one of the differential amplifier output terminals and main electrodes coupled between power supply conductors. Identical current sources drive corresponding transistors of each portion. The transistors of the second conductivity type enable quiescent voltages of only one base-to-emitter voltage drop to be developed at each of the output terminals of a differential amplifier to facilitate balance and maximization of the dynamic signal range. The substantially identical configurations of the two portions of the converter enable substantially identical quiescent currents to be drawn thereby to minimize the differential amplifier input offset voltage.

REFERENCES:
patent: 3760288 (1973-09-01), Leonard
patent: 3921090 (1975-11-01), Wheatley, Jr. et al.
patent: 3922614 (1975-11-01), VAN DE Plassche

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