Patent ID: 6404287
Filing Date: 2002-06-11
Classification: H03F

Abstract:
A linear amplifier bias network comprising:a radio frequency bipolar junction transistor having a collector, emitter and base; a capacitor having one end coupled to the base of the bipolar junction transistor and having an opposite end configured to receive a radio frequency signal; a second bipolar junction transistor having a base, a collector and an emitter, wherein the collector is coupled to a dc supply voltage; a first resistor having one end coupled to the base of the second bipolar junction transistor and having an opposite end coupled to a bias voltage source; a second resistor having a first end coupled to the emitter and having a second end coupled to the base of the radio frequency bipolar junction transistor, the second resistor having a resistance value rendering the linear amplifier bias network capable of minimizing gain expansion associated with the radio-frequency bipolar junction transistor; and a third resistor having one end coupled to the bias voltage source and having an opposite end coupled to the second end of the second resistor, wherein the second and third resistors are capable of adjusting a bias impedance associated with the bias network such that the bias network can achieve a desired temperature compensation characteristic.