Receiver passive lower mixer harmonic suppression correction method

The invention provides a correction method for harmonic suppression of a passive lower mixer of a receiver, and belongs to the technical field of integrated circuits. A radio frequency signal and a local oscillator signal LO are subjected to down-mixing through a passive IQ mixer to generate an intermediate frequency signal, the intermediate frequency signal is amplified through a first-stage transimpedance amplifier and input to a resistance network, and an output signal of the resistance network is connected to a next-stage transimpedance amplifier to be output. The resistor network comprises a gain correction resistor array RA, a phase correction resistor array RP and a fixed resistance resistor array. According to the invention, the phase and gain matching problem is solved by changing the size of all variable resistors in the resistance network, and the harmonic suppression ratio is obviously improved. Precise matching of the gain and the phase can be completed only by using the resistor array, so that t