| 摘要 |
PURPOSE:To realize easily circuit integration with a few adjusting processes of the titled circuit by constituting the circuit separating a synchronizing signal included in a television signal as a logic circuit. CONSTITUTION:When a signal A is inputted to a shift register 10 shifted by a clock Cp1, the signal is shifted at each stage. Shift outputs of each stage are ANDed and an output F is inputted to a frequency division circuit 12 via inverters 11a, 11b. The signal is frequency-divided into three and an output G is obtained, an output H ANDed with an output F is inputted to other terminal of a flip-flop to which the signal H is applied. A pulse width signal I from the leading of the output H till the rising of the signal A is obtained as an output P.L. Moreover, a frequency division circuit 14 makes control so that no excess pulse is outputted. |
