| 摘要 |
1. Frequency and phase stabilization device for a coder/decoder for colour video system, characterized in that it comprises a phase locking circuit containing an amplifier, an OR gate, a filter and a voltage controlled oscillator (VCO), said circuit receiving at the input a synchronization signal (SYN), and at least one D-type flip-flop (B1), of which the (SET) and (RESET) inputs receive the output signal (S) from the oscillator of the phase locking circuit through a complementary circuit and an inverter gate, the output from the flip-flop (B1) supplying a control signal to the coder/decoder, the flip-flop comprising a clock input (CLK) receiving a synchronization signal (SYN). |
