Cascode amplifier with nonlinearity correction and improve trans

Details Cascode amplifier with nonlinearity correction and improve trans Cascode amplifier with nonlinearity correction and improve trans

1987-08-06

1988-10-18

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

330151, 330252, 330311, H03F 132

Patent

active

047790571

ABSTRACT:
An improved cascomp amplifier includes a main differential transconductance amplifier stage, a pair of diode connected sense transistors and a differential correction amplifier stage. The sense transistors present a precise measure of the error voltage to the correction amplifier and extend the reverse breakdown voltage of the input stage of the main amplifier. The sense transistors are also used to correct additional gain variations due to transistor beta. The correction amplifier provides a current which cancels the nonlinearities of the main amplifier. The configuration of the correction amplifier reduces the capacitive load to the main amplifier thereby reducing aberrations in the transient response.

REFERENCES:
patent: 4267516 (1981-05-01), Traa
patent: 4390848 (1983-06-01), Blauschild

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