Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1992-07-17
1993-10-12
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
330126, 330267, 330295, H03F 330
Patent
active
052529312
ABSTRACT:
Disclosed is a a wide band frequency amplifier comprising the following: A first and a second transistor constitute a first push-pull amplifier circuit. A first current source is included, of which one end is connected to the second transistor base, the other end connected to ground. A first bias voltage source is interposed between the bases of the first and the second transistors. A third transistor is coupled with the first transistor in Darlington connection, thereby driving the first and the second transistors using an input signal. A fourth and a fifth transistor constitute a second push-pull amplifier circuit. A second current source is provided, of which one end is connected to the fourth transistor base, the other end connected to ground. A second bias voltage source is interposed between the bases of the fourth and the fifth transistors. A sixth transistor is coupled with the fourth transistor in Darlington connection, thereby driving the fourth and the fifth transistors using the input signal. A phase element is interposed between the second transistor base and the output end of the second push-pull amplifier circuit, thus causing the second and the fifth transistors to operate in Darlington connection at a trailing edge of the input signal.
REFERENCES:
patent: 4367442 (1983-01-01), Tanaka et al.
patent: 4431972 (1984-02-01), Ishii
patent: 4454479 (1984-06-01), Spires
patent: 4945259 (1990-07-01), Anderson
Mullins James B.
Sony Corporation
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