Differential mode input envelope detector applied to wake-up receiver

The invention relates to a differential-mode input envelope detector applied to a wake-up receiver. The differential-mode input envelope detector comprises N detector circuit subunits, n is greater than or equal to 1; and each detector circuit subunit comprises four coupling capacitors and four diodes. One end of the first coupling capacitor is connected with the negative input end of the single-ended to differential balun module, and the other end of the third coupling capacitor is connected with the negative input end of the single-ended to differential balun module; and one end of the second coupling capacitor is connected with the anode input end of the single-ended to differential Balun module. A positive input end and a negative input end are arranged in each stage of detector circuit subunit and connected with a positive output end and a negative output end of the balun module respectively, differential output signals of the single-end-to-differential balun module are fully utilized, and the gain of th