Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Patent
1979-02-02
1981-05-12
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
H03F 310
Patent
active
042675219
ABSTRACT:
A compound transistor circuit having a high input impedance as well as a high gain, comprises a first and a second bipolar transistor, and a third and a fourth bipolar transistor both being complementary to the above first and second transistors. The emitters of the first and second bipolar transistors are coupled together to a first terminal, and their bases are connected together to the collector of the first bipolar transistor. The third and fourth bipolar transistor emitters are coupled together to a second terminal, and their bases are connected together to the collector of the fourth bipolar transistor. The collectors of the first and third bipolar transistors are connected in common to a third terminal, and the collectors of the second and fourth bipolar transistors are coupled to each other.
REFERENCES:
patent: 3619658 (1971-11-01), Prunty
patent: 3681623 (1972-08-01), Hoffman, Jr. et al.
patent: 3914683 (1975-10-01), van de Plassche
patent: 3973215 (1976-08-01), Ahmed
patent: 4016435 (1977-04-01), Voorman
patent: 4027177 (1977-05-01), Davis
patent: 4029974 (1977-06-01), Brokaw
patent: 4081696 (1978-03-01), Oda et al.
Allen, "Two-Terminal Constant-Current Device", EEE, Oct. 1965, pp. 71, 72.
Williams, "A D.C. Regulator For Low Voltages", Electronic Engineering, Mar. 1970, pp. 41-43.
Mullins James B.
Nippon Gakki Seizo Kabushiki Kaisha
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