Patent ID: 6888405

Claim:
A programmable gain amplifier (PGA), comprising: a resistor having a plurality of taps; a first group of n-fine stage switches, each fine stage switch in said first group having an output coupled to a first group output terminal; a second group of n-fine stage switches, each fine stage switch in said second group having an output coupled to a second group output terminal; said first group of fine stage switches are connected to a first group of adjacent taps of said plurality of taps, and said second group of fine stage switches are connected to a second group of adjacent taps of said plurality of taps; a first coarse stage switch having an input coupled to said first group output terminal, and an output coupled to an output of said PGA; a second coarse stage switch having an input coupled to said second group output terminal, and an output coupled to said output of said PGA; and wherein if a first fine stage switch is closed in said first group, then a second fine stage switch is closed in said second group.