Patent ID: 6549075
Filing Date: 2003-04-15
Classification: H03G

Abstract:
A method of configuring a switch network, the method comprising the steps of:providing a variable gain circuit having a switch network that is configurable to control a ratio between at least one fixed resistor and at least one programmable resistor; comparing the ratio of the resistance of the at least one fixed resistor and the resistance of the at least one programmable resistor for a desired circuit gain; and configuring the switch network such that any switch that is in a DC current path when activated to implement the desired circuit gain is activated such that the DC current path switch resistance combines solely with the at least one resistor having the larger resistance value, and further such that the DC current path switch resistance of any switch that is in a DC current path when activated to implement the desired circuit gain is activated such that the DC current path switch resistance divides equally among the at least one fixed resistor and the at least one programmable resistor when the resistance of the at least one fixed resistor is equal to the resistance of the at least one programmable resistor to implement the desired circuit gain.