Integrator input error correction circuit and circuit method

摘要

A circuit includes a first amplifier and a second amplifier, wherein first amplifier is configured to receive an input current at a first input of the first amplifier, and an output of the first op-mp is configured to drive a first input of the second amplifier. The circuit further includes a pull-up current source selectively coupled to the first input of the second amplifier, and a pull-down current source selectively coupled to the first input of the second amplifier. If the absolute value of the input current is larger than a predefined threshold current: i) the pull-up current source is configured to drive current into the first input of the second amplifier for a first polarity of the input current, and ii) the pull-down current source is configured to sink current from the first input of the second amplifier for a second polarity of the input current.

主权项

1. A circuit comprising:
a first amplifier configured to receive an input current at a first input of the first amplifier, an output of the first amplifier being configured to drive a first input of a second amplifier; and one or more current sources selectively coupled to the first input of the second amplifier, wherein if a value of the input current is larger than a predefined threshold, the one or more current sources are configured to drive current into the first input of the second amplifier for a first polarity of the input current, and sink current from the first input of the second amplifier for a second polarity of the input current.