Current mirror amplifiers with programmable gain

Details Current mirror amplifiers with programmable gain Current mirror amplifiers with programmable gain

1980-06-30

1982-11-30

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330255, 330257, 330278, H03F 345, H03G 330

Patent

active

043618162

ABSTRACT:
A current mirror amplifier includes first and second transistors connected together at their common electrodes, the first transistor being connected for receiving input signal current at its output electrode, and the control electrodes of the transistors being connected for conditioning the second transistor for conducting a current responsive to the input signal current. Switch means, responsive to a control signal, selectively connects the output electrode of the second transistor to a supply terminal so the current gain between the input signal current and the current in the connection of their common electrodes switches responsive to the control signal.

REFERENCES:
patent: 3921090 (1975-11-01), Wheatley, Jr. et al.
patent: 3952257 (1976-04-01), Schade, Jr.
patent: 4064506 (1977-12-01), Cartwright, Jr.
patent: 4092612 (1978-05-01), Schade, Jr.
patent: 4103246 (1978-07-01), Limberg
patent: 4117416 (1978-09-01), Schade, Jr.
patent: 4117417 (1978-09-01), Ahmed
patent: 4119924 (1978-10-01), Ahmed
patent: 4151481 (1979-04-01), Funston et al.
patent: 4160944 (1979-07-01), Ahmed
patent: 4177392 (1979-12-01), Haferl

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