Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1979-04-16
1981-06-16
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330254, 330259, 330260, 330300, H03F 345
Patent
active
042740584
ABSTRACT:
An amplifier with separate AC and DC feedback loops is disclosed, in which first and second bipolar transistors or field effect transistors (FET) are connected differentially, a resistor is inserted between the emitters or sources of the first and second transistors, the base or gate of the first transistor is supplied with an input signal, the DC component of an output is fed back to the base or gate of the second transistor, the AC component of the output is fed back to the emitter or source of the second transistor to change over the feeding back amount of the AC component.
REFERENCES:
patent: 3419809 (1968-12-01), Lach et al.
Dereniak et al., "Low-Noise Preamplifier For Photoconductive Detectors," Review of Scientific Instruments, vol. 48, No. 4, Apr. 1977, pp. 392-394.
Mullins James B.
Sony Corporation
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