Nonlinear EMI simulation of an AM detector at the system level

Abstract

Abstract-A nonlinear detector simulation technique that can be used together with the discrete technique for a rapid radio receiver electromagnetic compatibility and electromagnetic interference (EMC/EMI) simulation up to the baseband signal processing path at the system level is proposed. The technique presented allows one to simulate an amplitude modulation (AM) detector in the large signal mode as well as in the small signal mode by taking into account the nonlinearity of the detector transfer characteristic. The technique was validated by making comparisons with measurements and PSPICE simulation data.

Electromagnetic interference detection method to increase the immunity of a microcontroller-based system in a complex electromagnetic environment

“…1, a monitor circuit is used prior to detection ADC2, whereas a resistor-capacitor (RC) low-pass filter (LPF) is used prior to normal ADC1. The monitor circuit is composed of a simple RC high-pass filter (HPF) and an envelope circuit [11]. The HPF stops the wanted signal but passes the interference signal; the envelope detector obtains the envelope of the interference signal and the envelope signal is coupled to the reference signal (2.5 V DC signal) to detection ADC2.…”

Tracing AM‐detector transfer characteristics

“…In Siforow (1974), it is shown that the transfer factor of the AM detector made of a diode or a bipolar transistor can be determined on the basis of the solution to some transcendental equation. This idea has been developed in Loyka (1999Loyka ( , 2000 where approximation formulas of the transfer factor, valid for small and large signals, are proposed.…”

EMC/EMI analysis in wireless communication networks

“…The input and output filters model the matching networks, and the quasymemoryless nonlinear elements model the amplifier nonlinearity (both AM-AM and AM-PM). Using this approach, we may simulate other RF and IF stages (like mixers and IF amplifiers) and even detectors [18] in a computationally-efficient way. Further, using the black-box approach, we may simulate the entire link and network operation under real -world conditions and signals.…”