Patent ID: 7492235

Claim:
An attenuator, comprising: a first series transistor having first and second terminals and a gate, the first terminal adapted to receive an input signal to be attenuated; a first gate resistor connected between a first attenuator control voltage and the gate of the first series transistor; a second series transistor having first and second terminals and a gate, the second terminal adapted to output an attenuated output signal; a second gate resistor connected between a second attenuator control voltage and the gate of the second series transistor; a shunt transistor, comprising: a gate configured as a gate transmission line, a source configured as a source transmission line, and a drain configured as a drain transmission line, wherein one of the source transmission line and the drain transmission line is connected to ground, and wherein the other of the source transmission line and the drain transmission line extends between the second terminal of the first series transistor and the first terminal of the second series transistor and has a selected characteristic impedance; and a shunt gate resistor connected between a third attenuator control voltage and the gate of the shunt transistor.