Patent ID: 6876243

Claim:
A programmable gain attenuator, comprising: a signal path having an input, an output, and a set of resistors coupled in series between said input and said output; a set of taps, wherein each tap in said set of taps corresponds to a terminal of a resistor in said set of resistors; an interpolation resistor coupled in parallel with said signal nath between a first tap in said set of taps and a second tap in said set of taps, said first tap and said second tap separated by at least two resistors in said set of resistors; and a set of switches, wherein each switch in said set of switches is coupled between a corresponding tap in said set of taps and a bias voltage, said bias voltage located outside said signal path; wherein said set of switches has a first switch with a first resistance and a second switch with a second resistance, said first switch and said second switch both being closed to provide an attenuation setting.