Patent ID: 9595937
Date: 2017-03-14
CPC Classifications: H03H

Claim:
1. An attenuator circuit, comprising: a first input node to receive a first input voltage signal; a second input node to receive a second input voltage signal; a first output node to provide a first output signal; a second output node to provide a second output signal; a first impedance circuit, including a plurality of first impedance components coupled with the first input node; a plurality of first switching circuits individually coupled with a corresponding one of the first impedance components, the individual first switching circuits operative to electrically connect the corresponding first impedance component to the first output node when a corresponding first control signal is in a first state, and to electrically connect the corresponding first impedance component to the second output node when the corresponding first control signal is in a second state; a second impedance circuit, including a plurality of second impedance components coupled with the second input node; a plurality of second switching circuits individually coupled with a corresponding one of the second impedance components, the individual second switching circuits operative to electrically connect the corresponding second impedance component to the first output node when a corresponding second control signal is in a first state, and to electrically connect the corresponding second impedance component to the second output node when the corresponding second control signal is in a second state; and a third impedance component coupled between the first and second output nodes, wherein the first impedance components are resistors, wherein the second impedance components are resistors, and wherein the third impedance component is a resistor.