MAGNETIC RECORDING AND REPRODUCING DEVICE PROVIDED WITH FM EQUALIZER CIRCUIT

摘要

PURPOSE: To attain optimum frequency characteristic for a reproduced FM luminance signal with respect to the plural recording modes for the NTSC/PAL systems, plural tape speeds and different luminance signal bands. CONSTITUTION: A reproduction FM luminance signal is fed to a trap 4 and a subtractor 5 via a subtractor 3. An output of the subtractor 5 indicates a BPF characteristic and outputted from an output terminal 2 via an adder 9. An output of the trap 4 is negatively fed back to the subtractor 3 via a coefficient circuit 6 to make the frequency band characteristic narrow thereby increasing FM equalization quantity. Furthermore, the output of the trap is fed to the adder 9 via the coefficient circuit 7 and a low-pass filter 8 to reduce the FM equalization quantity thereby realizing the FM equalizer circuit with a large variable range with respect to the frequency characteristic.