Patent ID: 6839009
Filing Date: 2005-01-04
Classification: H03M

Abstract:
1. In an analog-to-digital converter having successive converter stages, a method of converting data signals and calibrating at least one converter stage, the method comprising the steps of: with first sets of switched capacitors, processing data signals through said converter stages to provide corresponding data digital codes; with a second set of switched capacitors in a selected one of said converter stages, generating an initial calibration signal interleavably with said data signals; with second sets of switched capacitors in downstream converter stages that are downstream from said selected converter stage and in response to said initial calibration signal, processing downstream calibration signals interleavably with said data signals to provide corresponding calibration digital codes; with said second sets of switched capacitors in said selected and downstream converter stages, subsequently processing data signals through said converter stages to provide corresponding subsequent data digital codes; and correcting said subsequent data digital codes in accordance with said calibration digital codes.