NON-LINEAR DISTORTION GENERATOR FOR BOTH SECOND AND THIRD ORDER DISTORTION

摘要

An in-line distortion generator for coupling in-line with a non-linear device(NLD) produces an output signal of useful amplitude, but with low compositesecond order, composite triple beat and cross modulation distortions. Thedistortion generator comprises an instant controlled non-linear attenuatorwhich utilizes the non-linear current flowing through a pair of diodes, inparallel with a resistor and an inductor, to provide the proper amount ofsignal attenuation over the entire frequency bandwidth. The distortiongenerator circuitry is always matched to the NLD, thereby ensuring a frequencyresponse that is predictable and predefined. The distortion generator may alsoinclude a temperature compensation circuit to ensure consistent operationthroughout a wide temperature range.