Patent ID: 6992524
Filing Date: 2006-01-31
Classification: G05F,H03F

Abstract:
1. A bias control circuit for a bias circuit, said bias circuit being coupled to an amplifier transistor, said bias circuit including a first bias transistor, a second bias transistor, and a third bias transistor, a base of said amplifier transistor being coupled to an emitter of said second bias transistor, a base of said second bias transistor being coupled to a base of said first bias transistor and to a collector of said third bias transistor, a base of said third bias transistor being coupled to an emitter of said first bias transistor and to said bias control circuit at a first node, said bias control circuit comprising: means for receiving a control voltage; and means for actively adjusting an equivalent resistance of said bias control circuit responsive to said control voltage, said equivalent resistance being established between said first node and a reference voltage.