Patent ID: 7193477

Claim:
A gain amplifier, comprising: an amplification stage for amplifying a signal applied to an input of the amplifier; and a multi-band resonant load connected between a DC bias voltage and a DC bias input of the amplification stage, the multi-band resonant load using a set of elements to provide a match in a first frequency band, at least two subset of the set of elements to provide a match in a second frequency band, and in a third frequency band; wherein the set of elements includes a first capacitor, a first inductor, a second capacitor, a second inductor and a third inductor, the first capacitor and the first inductor being connected in parallel to form a shunt resonator, the second capacitor and the second inductor being connected in series to form a series resonator, and the shunt resonator and the series resonator being connected in parallel, which is then connected in series with the third inductor L 3 .