JPH0431420U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an optical disk recording device, Fig. 2 is a detailed circuit diagram of the shift register, logic circuit, and duty ratio setting circuit shown in Fig. 1, and Fig. 3 is a detailed circuit diagram of the circuit shown in Fig. 2. This is a time chart showing the signals flowing to each part. FIG. 4 shows the original recording signal and the recording pit formed by the original recording signal, and FIG. 5 shows the original recording signal, the recording signal generated based on the original recording signal, and the recording pit formed by the recording signal. ing. 10...shift register, 20...logic circuit,
21, 42...AND gate, 22...NAND gate, 40...Duty ratio setting circuit, 41
……counter.

Claims (1)

[Claim for Utility Model Registration] A first gate circuit that allows only a portion of the original recording signal having a predetermined width shorter than the shortest pit length of the optical disk to be recorded to pass through, the bits of the original recording signal. - A duty ratio setting circuit that sets the duty ratio of a clock signal having a frequency that is a predetermined times that of the clock signal; A second gate circuit is provided for passing the original recording signal from the falling point to near the falling point of the original recording signal, and recording is performed on the optical disk based on the output signals of the first gate circuit and the second gate circuit. An optical disc recording device featuring: