Patent ID: 6130635
Filing Date: 2000-10-10
Classification: H03M

Abstract:
A method for operating a circuit in an analog to digital converter, comprising the steps of:providing a resistor network, the resistor network having: (i) a plurality of resistor banks connected together, each resistor bank of the plurality of resistor banks having a plurality of resistors connected together in series, such that a node is present between adjacent resistors in said each resistor bank, and a plurality of first switches for selecting a node between adjacent resistors, and (ii) a plurality of second switches for selecting a chosen resistor bank of the plurality of resistor banks, wherein a parasitic capacitance is present between the plurality of resistors of the chosen resistor bank and a second switch of the plurality of second switches;closing a first switch of the plurality of first switches in the chosen resistor bank to charge the parasitic capacitance; andclosing a second switch of the plurality of second switches after closing the first switch after charging the parasitic capacitance in said chosen resistor bank.