Power buffer circuit

Details Power buffer circuit Power buffer circuit

1986-04-07

1988-03-01

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

323273, 323280, 330300, H03F 134, G05F 140

Patent

active

047289015

ABSTRACT:
A power buffer circuit includes a power MOS device connected via a local feedback loop to a differential amplifier. The MOS device amplifies the power of an input signal to produce an output signal. The differential amplifier causes the output signal voltage to follow the input signal voltage by sensing a difference between the two voltages and generating in response a difference signal to the MOS device to change the output signal voltage level. The buffer circuit may be configured as a current source or a current sink that maintains unity voltage gain from the input to output signal. The power buffer circuit may be incorporated into a voltage regulator that maintains a remotely sensed output voltage substantially equal to a predetermined factor of a reference voltage via a second, outer feedback loop.

REFERENCES:
patent: 3244963 (1966-04-01), Kreckel
patent: 3315149 (1967-04-01), Strait et al.
patent: 4560918 (1985-12-01), Callen
Richardson, "New Op Amps And Applications," New Electronics, vol. 13, No. 12, Jun. 12, 1980, pp. 103, 104, 107.
Williams, "Voltage Following;" Wireless World, Sep. 1968, pp. 295-298.

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