Dual-input describing function of double-valued nonlinearities
P.K. Rajagopalan, J. Mishra · Proceedings of the Institution of Electrical Engineers · 1969
A general method of obtaining the altered characteristic, and hence the dual-input describing function (d.i.d.f.), of double-valued nonlinearities subjected to two sinusoidal signals whose frequencies are incommensurate has been presented with illustrative examples and experimental verification.