| 摘要 |
PURPOSE:To give a shaping to the signal having a large waveform distortion into the signal having the prescribed pulse duration, by carrying out a phase comparation between the input signal and the received clock at the changing point of the input signal and thus securing the synchronism of the digital phase. CONSTITUTION:Phase comparator 1 carries out a phase comparison to received clock (d) at the fall point of input signal (c), and then transmits phase comparison signal S1 to phase compensator 3. And phase compensation controller 2 transmits phase compensation timing signal s2 produced by the fall of signal (c) and the rise of signal (d) each to compensator 3. Compensator 3 gives the 1/4 division to the output of reference frequency oscillator 6 while receiving no signal s2. And the 1/4 division is changed over to the 1/3 division when receiving signal s2 and advance commanding signal s1. Furthermore, the 1/3 division is changed over to the 1/5 division with reception of both signal s2 and delay commanding signal s1. Then the 1/32 phase comensation is carried out for signal (d), and thus phase compensation signal s3 is sent to divider 4. Signal s3 is divided into 1/8 by divider 4 to produce reception clock (d) synchronized with signal (c). Clock (d) is then sent to waveform shaping circuit 5, and signal (c) is sampled by signal (d) at circuit 5. Then waveform shaping output signal (e) having the prescribed pulse duration is transmitted. |
