A Wideband Envelope Detector with Low Ripple and High Detection Speed

In this paper, a new envelope detector design in a 40nm CMOS technology is presented. The design employs quadrature signal generation and 2^nd harmonic cancellation to reduce output ripple while achieving high detection speed at the same time. The envelope detector operates from 500MHz to 6GHz with a detection speed of 250 MHz. It achieves less than 2% ripple, 0.64 ns delay and consumes 76.9 uW. With the achieved results, it is suitable for use in a nonlinear interference suppression receiver, enabling more than 25 dB of suppression.