Patent ID: 7440734

Claim:
A quadrature RF power detector comprising: A first amplifier input adapted to receive a first amplifier signal from an output of an in-phase amplifier leg of RF power amplifier circuitry, and a second amplifier input adapted to receive a second amplifier signal from an output of a quadrature-phase amplifier leg of the RF power amplifier circuitry, wherein the second amplifier signal is phase-shifted from the first amplifier signal by essentially 90 degrees; first amplifier and detection circuitry adapted to amplify and detect the first amplifier signal to provide a first detection output signal that is a DC representation of the first amplifier signal, wherein the input impedance of the first amplifier input is higher than the output impedance of the first amplifier and detection circuitry providing the first detection output signal; second amplifier and detection circuitry adapted to amplify and detect the second amplifier signal to provide a second detection output signal that is a DC representation of the second amplifier signal, wherein the input impedance of the second amplifier input is higher than the output impedance of the second amplifier and detection circuitry providing the second detection output signal; combining circuitry adapted to combine the first and second detection output signals to provide a combined detection output signal; and filter circuitry adapted to filter the combined detection output signal to reduce ripple to provide a filtered, combined detection output signal.