Amplifier and method of canceling distortion by combining hyperb

Details Amplifier and method of canceling distortion by combining hyperb Amplifier and method of canceling distortion by combining hyperb

1998-06-01

1999-08-24

Lee, Benny

Amplifiers

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

330252, 330295, H03F 126

Patent

active

059429399

ABSTRACT:
A differential amplifier (10) receives a differential input signal (V.sub.IN). The input signal is attenuated by a first attenuator (12) and applied to a tan h amplifier (16). The input signal is also attenuated by a second attenuator (14) and applied to a sin h amplifier (18). The input signals to the tan h amplifier and sin h amplifier are independently attenuated. The transfer functions of the tan h amplifier and the sin h amplifier each have a linear region and a non-linear region. The output of the tan h amplifier and the sin h amplifier are summed (26) so that the non-linear region of the tan h amplifier cancels with the non-linear region of the sin h amplifier. The overall transfer function of the differential amplifier is linear over a wide range of input signal amplitudes by the cancellation of the non-linear regions.

REFERENCES:
patent: 4095196 (1978-06-01), Seidel
patent: 4392252 (1983-07-01), Cluniat
patent: 4529946 (1985-07-01), Kusakabe
patent: 5406223 (1995-04-01), Vulih
patent: 5815039 (1998-09-01), Kimura

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