Equalizer used for a VTR

Abstract

A video signal is read from a magnetic tape, and amplified by a head amplifier. The video signal then passes separately through first and second BPFs, the BPFs having respective passband characteristics so as to be applied to a first adding circuit. A first coefficient circuit multiplies the output from the first BPF by a positive coefficient while a second coefficient circuit multiplies the output from the second BPF by a negative coefficient. A second adding circuit adds all three signals, namely, signals from the first adding circuit and from the first and second coefficient circuits, and outputs the added signal to a trap circuit. The frequency characteristic of the equalizer can be adjusted by changing the coefficients in the first and second coefficients circuits. A change of the coefficients does not affect the level of the carrier component of a luminance signal.

Dependencies are inferred from the claim text.