Systematic design of negative group delay circuits

Abstract

In this brief, we introduce and verify some general opamp based structures to obtain negative group delay circuits. First order and second order negative group delay circuits are verified and all are noninverting circuits. As both the transfer functions and the group delay are simultaneously considered important derivations related to the actual bandwidth of operation are derived. LTSpice circuit simulations and experimental results using Gaussian input signals are provided to verify the theory.