Circuit providing harmonic response rejection for a frequency mixer

An apparatus for reducing a harmonic response in an electronic circuit is provided. The apparatus includes an RF input configured to provide a first signal operating at a radio frequency. The apparatus includes a local oscillator configured to produce a second signal operating at a local oscillator (LO) frequency. The apparatus includes a switching mixer configured to mix the first and second signals. The apparatus includes a notch filter comprising an inductor and a capacitor connected in parallel. The notch filter is directly coupled to an input of the switching mixer in series. The notch filter is tuned such that its resonant frequency is a harmonic of the LO frequency signal. In an aspect, the apparatus also includes a transformer configured to provide the first signal. In an aspect the apparatus also includes a second notch filter comprising a second inductor and a second capacitor connected in parallel. 提供了种用于减小电子电路中的谐波响应的装置。该装置包括RF输入，其被配置为提供在射频处操作的第信号。该装置包括本地振荡器，其被配置为产生在本地振荡器(LO)频率处操作的第二信号。该装置包括开关混频器，其