Patent ID: 8903339

Claim:
A gain adjustment device for a wireless communication circuit, the wireless communication circuit comprising a transmission circuit and a reception circuit, the gain adjustment device comprising: a signal generator, coupled to the transmission circuit, for generating a test signal to the transmission circuit, wherein the test signal is an anti-ramp signal including a plurality of sinusoidal waves with different predetermined power levels, and is transmitted through a printed circuit board (PCB) such that the reception circuit coupled to the transmission circuit generates a corresponding reception signal in response to the test signal; and a gain adjustment circuit, comprising: a power detector, coupled to the reception circuit, for detecting a plurality of power levels corresponding to the different predetermined power levels in the reception signal, respectively and accordingly generates a detection result; and a control unit, coupled to the power detector and the transmission circuit, for adjusting the transmitter gain configuration and the receiver gain configuration according to the detection result.