Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Patent
1981-11-09
1986-01-21
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
323316, H03F 304
Patent
active
045659737
ABSTRACT:
A current amplifying circuit comprising an input current source connected in series between a power source terminal and a ground terminal, first and second transistors connected diodes, a third transistor whose base is connected to the connecting point of the input current source and the first transistor and whose collector is connected to the power source terminal, and a fourth transistor whose base is connected to an emitter of the third transistor, whose emitter is connected to the ground terminal and whose collector becomes an output terminal. In this circuit, the current source of a current proportional to the input current is inserted between the ground terminal and the emitter of the third transistor, and the current amplification factor is set by the emitter area ratio of the first and fourth transistors and the current ratio of the current sources.
REFERENCES:
patent: 3868581 (1975-02-01), Ahmed
patent: 4142117 (1979-02-01), Chang
patent: 4240041 (1980-12-01), Hashimoto et al.
patent: 4292597 (1981-09-01), Niimura et al.
"Radio Fernsehen Elektronik" 26, 1977, No. 23/24, pp. 755-760.
1975 IEEE International Solid-State Circuits Conf. pp. 194-195.
1978 International Solid-State Circuits Conf., pp. 142-143.
Mullins James B.
Tokyo Shibaura Denki Kabushiki Kaisha
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