Magnetic recording correction circuit for reducing interference waves by third-degree inter-modulation distortions

摘要

A magnetic recording correction circuit for a video tape recorder comprises a first multiplier supplied with a first signal to output a signal having a frequency which is twice as high as that of the first signal; a second multiplier supplied with a second signal and a first multiplier output signal outputted from the first multiplier to output a correction signal having a component of a sum frequency of the second signal and the first multiplier output signal and a component of a difference frequency therebetween; an adding circuit for adding the first and second signals and the correction signal; and a phase shifter provided on the output side of the second multiplier to exert a phase characteristic on the correction signal with respect to the first and second signals.