Open-Loop RF Transmitter Output Power Control for Increased Power Efficiency (NC#97507) system includes microprocessor, battery, bias control circuitry, supply control circuitry and power amplifier. Microprocessor receives desired RF output power and battery voltage value and transmits bias control voltage and supply control voltage. Bias control circuitry is operatively coupled to microprocessor and receives bias control voltage and transmits bias output voltage. Supply control circuitry is operatively coupled to battery and microprocessor, and receives battery voltage and supply control voltage, and transmits supply collector voltage. Power amplifier is operatively coupled to supply control circuitry and bias control circuitry via inductor, and receives supply collector voltage and bias output voltage, and transmits RF output signal in response to RF input signal, supply collector voltage and bias output voltage.
Open-Loop RF Transmitter Output Power Control for Increased Power Efficiency (NC #98068) method includes determining a desired RF output power and obtaining a battery voltage value; determining a supply control voltage, a bias control voltage and a highest power efficiency; and transmitting selected values of the supply control voltage and the bias control voltage to supply control circuitry and bias control circuitry.
