Patent ID: 6906592

Claim:
A radio frequency (RF) driver amplifier system for providing linear in decibel gain control in response to gain control voltage received, said RF driver amplifier system having driver amplifier circuitry including a bipolar junction transistor and a matching circuit, said RF driver amplifier system comprising: a linear transconductor receiving an input voltage and providing a controlled current based on input voltage received; temperature compensation circuitry for varying current from the linear transconductor according to absolute temperature; an exponential current controller receiving current varied according to temperature from the temperature compensation circuitry and providing an exponential current in response; and an inductive degeneration compensator receiving exponential current from the exponential current controller and providing a control current to said driver amplifier circuitry compensating for inductive degeneration due to at least one inductor in said driver amplifier circuitry; wherein control current passes from said inductive degeneration compensator to said driver amplifier circuitry and said bipolar junction transistor and matching circuit and output gain from said driver amplifier circuitry varies linearly in decibels with respect to the input voltage.