Field effect transconductance amplifiers

Details Field effect transconductance amplifiers Field effect transconductance amplifiers

1979-01-18

1980-12-23

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330151, 330300, 330311, H03F 316

Patent

active

042413168

ABSTRACT:
Field effect transconductance amplifiers having improved linearity and noise rejection characteristics to provide an amplifier output having excellent temporal coherence with the input signal are disclosed. The amplifiers utilize a series connection of two field effect devices, actual or emulated, preferably appropriately biased in a carrier velocity limited region to maximize linearity of the output. A high level of rejection of power supply noise may be achieved by a third series field effect device. Various embodiments including high gain and power amplifier embodiments are disclosed.

REFERENCES:
patent: 3286189 (1966-11-01), Mitchell et al.
patent: 3449683 (1969-06-01), Gane
patent: 3449686 (1969-06-01), Bladen
patent: 3723892 (1973-03-01), Julie
Watson, "Biasing Considerations in F.E.T. Amplifier Stages", Electronic Engineering, Nov. 1968, pp. 600-605.
Nienhuis, "Integrated Audio Amplifiers with High Input Impedance and Low Noise", Philips Technical Review, vol. 31, No. 7/8/9, pp. 245-247.

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