AMPLIFICATION CIRCUIT AND METHOD OF COMPENSATING FOR VOLTAGE OFFSET OF INPUTS

摘要

Aspects of the disclosure provide an amplification circuit. The amplification circuit includes an amplifier and a first variable resistive device. The amplifier includes first and second input nodes configured to receive the first and second input electrical signals and first and second output nodes configured to output first and second output electrical signals having amplified voltages relative to the first and second input electrical signals. The first variable resistive device is electrically coupled to the second input node of the amplifier. The first variable resistive device being configured to have a selected resistance value to compensate for a direct current (DC) voltage difference between the first and second input electrical signals based on a DC voltage difference between first and second output electrical signals that are output from the first and second output nodes of the amplifier.

主权项

1. An amplification circuit, comprising:
an amplifier configured to amplify first and second input electrical signals, the amplifier including:
first and second input nodes configured to receive the first and second input electrical signals; andfirst and second output nodes configured to output first and second output electrical signals having amplified voltages relative to the first and second input electrical signals; and a first variable resistive device electrically coupled to the second input node of the amplifier, the first variable resistive device being configured to have a selected resistance value to compensate for a direct current (DC) voltage difference between the first and second input electrical signals, based on a DC voltage difference between first and second output electrical signals that are output from the first and second output nodes of the amplifier.