Amplifiers – With semiconductor amplifying device – Including particular biasing arrangement
Patent
1977-01-13
1978-10-17
Dahl, Lawrence J.
Amplifiers
With semiconductor amplifying device
Including particular biasing arrangement
330253, 330261, H03F 304
Patent
active
041211693
ABSTRACT:
An amplifier device comprises a pair of cascode connected transistors wherein the base of the first transistor is connected to an input terminal, the emitter is grounded through a resistor, the collector is connected to the emitter of the second transistor, the collector of the second transistor is connected to a source through a resistor and to an output terminal, and the base of the second transistor is connected to the emitter of the first transistor via a biasing circuitry. The voltage drop between the collector and the emitter of the first transistor is kept constant irrespective of the input signal voltage. The amplifier operates stably with a small deformation of the waveform.
REFERENCES:
patent: 3641448 (1972-02-01), Steckler
patent: 3660773 (1972-05-01), Free
patent: 3938055 (1976-02-01), Buhler
Dahl Lawrence J.
Helzer Charles W.
Nippon Gakki Seizo Kabushiki Kaisha
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