Attenuator circuit employing bootstrapping

Details Attenuator circuit employing bootstrapping Attenuator circuit employing bootstrapping

H - Electricity

03

H

333/86

H03H 11/24 (2006.01) H03G 1/00 (2006.01) H03G 7/00 (2006.01) H03G 9/02 (2006.01) H03G 9/18 (2006.01)

Patent

CA 1269138

ABSTRACT OF THE DISCLOSURE ATTENUATOR CIRCUIT EMPLOYING BOOTSTRAPPING When impedance elements such as FETs are used in attenuators, the elements have linear responses only when the signals attenuated are below certain signal levels. When signal conditions causing the element to operate non-linearly are detected, bootstrapping is applied to reduce the voltage across the element so that the element will operate linearly. The control signal at the gate of the element is then modified to compensate for the increase in effective impedance of the element caused by bootstrapping. The improved attenuators are especially useful in signal compressors and expanders.

530894

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