Patent ID: 7420421

Claim:
An open-loop radio frequency transmitter output power control system, comprising: a microprocessor capable of receiving a desired RF output power and a battery voltage value and transmitting a bias control voltage and a supply control voltage; a battery, operatively coupled to said microprocessor, capable of transmitting a battery voltage value to said microprocessor; a bias control circuitry, operatively coupled to said microprocessor and a ground, capable of receiving said bias control voltage from said microprocessor, capable of transmitting a bias output voltage; a supply control circuitry, operatively coupled to said battery, said microprocessor and said ground, capable of receiving a battery voltage and said supply control voltage, capable of transmitting a supply collector voltage, and wherein said supply control circuitry comprises a supply control amplifier; and a power amplifier having an RF input node and an RF output node, operatively coupled to said supply control circuitry and said bias control circuitry via an inductor, capable of receiving said supply collector voltage from said supply control circuitry, capable of receiving said bias output voltage from said bias control circuitry via said inductor, capable of receiving an RF input signal from said RF input node and transmitting an RF output signal from said RF output node in response to said RF input signal, said supply collector voltage and said bias output voltage.