| 摘要 |
A counting clock generator for a video tape recorder, in which two different phase counter clock signals at a pulse repetition frequency corresponding to the running speed of a tape are processed to obtain a direction detection signal indicating the direction of running of the tape and a clock signal at a frequency of predetermined times that of the two different phase counter clock signals, and the clock signal thus obtained is counted by a reversible counter, which is controlled for switching between up-counting and down-counting by the direction detecting signal with data "0" preset when the tape is running forward and data "maximum value" preset when the tape is running backward, for producing two revised counter clock signals of different phases according to the count output signal from the reversible counter. |
