Patent ID: 6744322
Filing Date: 2004-06-01
Classification: H03F

Abstract:
A circuit comprising:a bipolar transistor having a base, an emitter, and a collector, said bipolar transistor comprising a SiGe HBT; a field effect transistor having a gate, a source, and a drain; said base of said bipolar transistor being an input of said circuit; said emitter of said bipolar transistor being coupled to a first reference voltage; said collector of said bipolar transistor being coupled to said source of said field effect transistor; said gate of said field effect transistor being coupled to a bias voltage; said drain of said field effect transistor being coupled to a second reference voltage; said drain of said field effect transistor being an output of said circuit; wherein said drain of said field effect transistor is not coupled to said base of said bipolar transistor by a feedback network, wherein said drain of said field effect transistor is directly coupled to a first capacitor, said first capacitor being directly coupled to a BiFET low noise amplifier output wherein said base of said bipolar transistor is directly coupled to a second capacitor and directly coupled to a bias circuit.