Patent ID: 9292716
Filing Date: 2016-03-22
CPC Classification: G01R,G06G,H03D

Claim Text:
1. A power detection circuit configured to detect an output power of a radio frequency transmitter, the power detection circuit comprising: a multiplier circuit configured to multiply a first differential input signal and a second differential input signal, wherein (i) the first differential input signal corresponds to a radio frequency signal to be amplified by the radio frequency transmitter, and (ii) the second differential signal corresponds to an output signal as amplified by an amplifier of the radio frequency transmitter; a bias circuit configured to generate a bias signal; and a differential amplifier configured to generate, based on (i) the bias signal and (ii) the first differential signal and the second differential signal as multiplied by the multiplier circuit, an indication of the output power of the amplifier of the radio frequency transmitter.