An apparatus for generating a velocity error signal.

摘要

There is an apparatus for generating a velocity error signal for use in a time base corrector. This apparatus comprises: an A/D converter (2) to convert a velocity error to a digital signal; a summing circuit (4) to convert an output signal of the A/D converter (2) to a phase shift amount; a zero value interpolation circuit (5) to multiply the sampling frequency of the phase shift amount with an integer; a digital low-pass filter (6) to interpolate an output signal of the interpolation circuit (5); a differentiating circuit (7) to convert an interpolated phase shift amount of an output signal of the low pass filter (6) to a phase difference; and a D/A converter (9) to convert the digital phase difference data to an analog signal. With this apparatus, the velocity error can be accurately corrected.