Brake pulse forming circuit for a video tape recorder

Claim 1

In a video tape recorder having a capstan motor for intermittently driving a tape with a predetermined time interval, a brake pulse forming circuit for forming a brake pulse having a corrected pulse width and applying the same to said capstan motor to brake the capstan motor in a reverse direction during tape traveling, comprising: means for supplying said capstan motor with a motor driving signal for driving said capstan motor, means for generating a brake pulse having a constant pulse width and applying the same to said capstan motor at the time of braking said capstan motor in a reverse direction, means for generating first and second FG signals, out of phase with each other, associated with rotation of said capstan motor, first latch means for latching a level of said first FG signal at the rising edge of said second FG signal, second latch means for latching a level of said second FG signal at the rising edge of said first FG signal, third latch means for latching a level of an inverted signal of said first FG signal at the falling edge of said second FG signal, fourth latch means for latching a level of an inverted signal of said second FG signal at the falling edge of said first FG signal, a first gate for outputting a signal indicating reverse detection of said capstan motor in response to the outputs of said first, second, third and fourth latch means, a second gate for correcting a constant pulse width of said brake pulse so that said brake pulse may be terminated in response to the output of said first gate, and a third gate for correcting said motor driving signal so that said motor driving signal may be terminated in response to the output of said first gate.