Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1989-03-22
1990-06-26
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330261, H03F 345
Patent
active
049375342
ABSTRACT:
In a band-pass amplifier having differential stage comprising two transistors fed from a joint current source, the collector of the first transistor is connected via a resistor to the base of a third transistor complementary to the first and second transistor, and the collector of the second transistor is connected via a resistor to the base of a fourth transistor complementary to the first and second transistor. The emitters of the third transistor and fourth transistor are connected to a supply voltage source, and the collectors of the third and of the fourth transistor form the output terminals of the amplifier.
REFERENCES:
patent: Re32479 (1987-08-01), Bohme
patent: 4547744 (1985-10-01), Kasperovitz
Mottola Steven
Telefunken electronic GmbH
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