Amplifiers – With semiconductor amplifying device – Including particular power supply circuitry
Patent
1991-05-03
1992-10-20
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including particular power supply circuitry
330202, 323267, H03F 100
Patent
active
051573539
ABSTRACT:
The present invention relates to electronic circuits, such as an operational amplifiers, which have dual power supply requirements. When the power supply voltages are switched between an "off" state and an "on" state, the power supply transient voltages of the two polarities closely track each othe so as to reduce audio transients from being produced within the operational amplifiers. This tracking is accomplished by the negative polarity power supply voltage being provided for the signal amplifier at the output terminal of an unity gain operational amplifier having an inverting input terminal coupled to the positive polarity power supply voltage.
REFERENCES:
patent: 3133242 (1964-05-01), Harries
patent: 3747008 (1973-07-01), Zaretsky
patent: 3826969 (1974-07-01), Eichelberger et al.
patent: 4283673 (1981-08-01), Lieux
patent: 4320447 (1982-03-01), Krauss
patent: 5027266 (1991-06-01), Ishii et al.
Balakrishnan, "Power GaAsFET Amplifier with Single Supply", Electronic Engineering, Nov. 1986, p. 40.
Emanuel Peter M.
Mullins James B.
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
Wein Frederick A.
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