Amplifier having field effect or bipolar transistors and a power

Details Amplifier having field effect or bipolar transistors and a power Amplifier having field effect or bipolar transistors and a power

1996-09-13

1997-08-05

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330277, H03F 316

Patent

active

056546734

ABSTRACT:
This invention has as its object to prevent the lower limit value of the linear input range of an amplifier from being changed even when the threshold voltage of a transistor varies. In order to achieve this object, a power supply voltage to be applied to the source electrode of a field effect transistor 17 which receives an input of the amplifier is supplied by an output from a source follower 21, 22 constituted by a field effect transistor. A power supply voltage to be applied to the emitter electrode of a bipolar transistor which receives an input of the amplifier is supplied by an output from an emitter follower constituted by a bipolar transistor.

REFERENCES:
patent: 5045808 (1991-09-01), Taylor
patent: 5068623 (1991-11-01), Camin et al.
IEEE Journal Of Solid-State Circuits., vol. SC-18, No. 6, Dec. 1983, New York, pp. 716-722, R.J. Van De Plassche et al. `A Monolithic High-Speed Sample-And-Hold Amplifier For Digital Audio.`.

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