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DC offset self-calibration system for a digital switching amplifier

  • US 6,724,248 B2
  • Filed: 04/19/2002
  • Issued: 04/20/2004
  • Est. Priority Date: 04/24/2001
  • Status: Expired due to Term
First Claim
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1. A differential amplifier comprising first and second outputs and first and second supply rails, the differential amplifier further comprising offset cancellation circuitry which is operable during a calibration mode to generate an offset cancellation signal when the first and second outputs are both coupled to a calibration voltage between the first supply rail and the second supply rail, the offset cancellation signal being for facilitating at least partial cancellation of an offset voltage associated with the first and second outputs during a normal operation mode of the differential amplifier.

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