JPS5971472U - Information reading position control signal generation circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing the main parts of an example of an optical disc playback device with a built-in length-jump control section;
The figure is a connection diagram showing a conventional control signal generation circuit, FIG. 3 is a waveform diagram used to explain the operation of the circuit shown in FIG. 2, and FIG.
The figure is a connection diagram showing an example of an information reading position control signal generation circuit according to the present invention, FIG. 5 is a waveform diagram used to explain the operation of the example shown in FIG. 4, and FIG. 6 is an information A connection diagram showing another example of the reading position control signal generation circuit, and FIG. 7 is a waveform diagram used to explain the operation of the example shown in FIG. 6. In the figure, 1 is a disk, 4 is an information reading means, 8 is a light beam control circuit, 10 is a 1-track/jump operation signal generation circuit, 12 is an S-RF-F, 3 is an operational amplifier, 1
6 is a level comparison section, 17 is an edge detection section, 18 and 21
2 is a monostable multivibrator, 20 is an AND gate, and 22 and 25 are waveform shaping units. Figure 6 S meeting

Claims (1)

[Scope of utility model registration request] A pulse for a drive signal for moving a reading position on the disk by the information reading means in a direction across a recording track formed in a spiral shape on the disk is applied so that the reading position is between two adjacent recording tracks. A driving pulse generator generates a driving pulse so as to have a trailing edge at a certain point in time, and a braking signal pulse for quickly applying a brake to the movement of the driving signal at the reading position.
A braking pulse generator that generates a braking pulse for a predetermined period after the trailing edge of the driving signal pulse;
and a combining section disposed on the output side of the braking pulse generating section and generating the driving signal and the braking signal in succession according to the driving signal pulse and the braking signal pulse, and the braking pulse generating section. a waveform shaping section disposed between the generating section and the synthesizing section or on the output side of the synthesizing section so that the amplitude of the leading edge of the braking signal is larger than the amplitude of the trailing edge; An information reading position control signal generation circuit comprising: