Class-A differential amplifier and method

Details Class-A differential amplifier and method Class-A differential amplifier and method

1990-10-25

1992-06-16

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330261, H03F 345

Patent

active

051227592

ABSTRACT:
A circuit for the Class-A differential amplification of two input signals.
A first constant current source 22 is connected between a voltage supply terminal 3 and a node 8. A second constant current source 24 is connected between the supply terminal 3 and a node 9. A first transistor T1, with a control electrode connected to input terminal 1, has a conduction path connected between node 8 and a voltage supply terminal 10. A second transistor T2, with a control electrode connected to input terminal 2, has a conduction path connected between node 9 and terminal 10. A third transistor T3, with a control electrode connected to input terminal 1, has a conduction path connected between node 9 and an output terminal 6. Finally, a fourth transistor T4, with a control electrode connected to input terminal 2, has a conduction path connected between node 8 and an output terminal 7.

REFERENCES:
patent: 5006818 (1991-04-01), Koyama et al.
Schmoock, "An Input Stage Transconductance Reduction Technique for High-Slew Rate Operational Amplifiers", IEEE Journal of Solid-State Circuits, Dec. 1975, pp. 407-411.

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