JPS5990263A - Discoid information recorder - Google Patents

Abstract

PURPOSE:To record information at an equal linear speed by controlling the motor of a rotating device which rotates a disk and the motor of a feeding means which moves a pickup for recording radially and relatively. CONSTITUTION:The number of revolution of a turntable motor 3 is detected by a frequency generator FG7 and applied to a turntable motor control circuit 14, and a reference signal A is also applied to the circuit 14, so that the turntable motor 3 is driven to rotate synchronizing with the signal A. The signal A is supplied to a feed motor control circuit 15 as well. This circuit 15 has a frequency converting circuit 24 additionally as compared with the circuit 14. A reference signal B generated by this circuit 24 is applied to a phase comparator 25 together with a signal FG to generate and apply a signal corresponding to their phase difference to a feed motor 16, thereby moving the recording pickup through a feed stage 18. Consequently, the motors 16 and 13 are controlled to realize the recording at the equal linear speed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an information recording device for recording information such as video signals on a disc-shaped record carrier.

Conventional configurations and their problems Traditionally, the constant linear velocity (hereinafter referred to as CLV) of a recording device is such that the recording density is one line at each point on the radius of a disc-shaped record carrier (hereinafter referred to as a disk). It has been widely proposed because it increases the amount of information recorded on a single disk compared to angular velocity (hereinafter referred to as OAV).

A conventional example is shown in FIG. 1 and will be explained based on FIG. The disk (1) is placed on the turntable (2) and rotated by the turntable motor (3), and the recording pickup (4) is optically or mechanically placed on the turntable (2). Record information at points.

However, if the recording pickup (4) is an optical type, a photosensitive agent such as a resist must be applied onto the disk (1).

The recording pickup (4) is movable by a feeding means (5) in the radial direction of the disk (1), and the radial position of the recording pickup (4) is outputted as a voltage VB by 4% by a potentiometer (6). The voltage from the potentiometer (6) increases proportionally as the radial position of the recording pickup (4) moves outward, as shown in FIG. Turntable motor (,
3) is detected by a frequency generator (hereinafter referred to as FG), and the F-V replacer (8) generates a voltage VF that is inversely proportional to the motor rotation speed. Shown in Figure 3.

The output voltages of each of the potentiometer (6) and the F-V converter (8) are applied to a differential amplifier (9) to create an error voltage VE. This error voltage VE passes through the power amplifier OQ and drives the motor (3). At this time, use a potentiometer (6J, F-V converter (
8) must be adjusted.

When using such an analog method, the potentiometer (
6) FNU, linearity, temperature stability, and h
The temperature stability of the '-vy converter (8) becomes a problem, and it is necessary to adjust the characteristics including the temperature characteristics of the potentiometer (6) and the F-V converter (8). Further, in the conventional example, there is no control of the feeding means necessary for recording, and it is important to control the feeding means (5) including the feed motor in addition to controlling the turntable motor (3).

Purpose of the Invention In view of these points, the present invention performs a foot roll of the motor of the rotating device that rotates the disk and the motor of the feeding means that moves the pickup that performs recording relative in the radial direction, so that information can be recorded in the CL■. It is an object of the present invention to provide a disc-shaped information recording device that can be used to record data.

Structure of the Invention In order to achieve the above object, the present invention provides a rotating device for rotationally driving a disk-shaped record carrier, a recording pickup for recording information on the disk-shaped record carrier, and a recording position of the recording pickup for moving the recording position. A recording device that records information such as video signals and audio signals onto a disk-shaped record carrier, the recording device having a scale that detects a recording position and digitally outputs data, and a scale that inputs and processes the data. It has a reference signal generation circuit consisting of a microprocessor, a crystal oscillator, a programmable counter, and a
By adding the output of the crystal oscillator and the output of the microprocessor to a programmable counter and changing the frequency division ratio, the frequency of the output signal of the reference signal generation circuit is changed, and the output of the motor of the rotating device and the feeding means are The motor is controlled so as to be synchronized with the output signal of the reference signal generating circuit, and the recording is performed at a constant linear velocity at a desired position on the disk radius.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. , @
In Figure 4, the disc (1) is the turntable (2)
It is held on top and is rotationally driven by a turntable motor (3). A recording pickup (4) optically or mechanically records information at point (a) on the disk. The recording position fit (a) point is detected by the digital scale (b), and the digital output from the digital scale (b) is added to the microprocessor (2) and processed as follows.

ν. XM 1 Added to the generator circuit (c). The head of the reference signal generation circuit is shown in Fig. 5. It consists of a crystal optical oscillator α and a programmer full counter (E). The digital output N of the microprocessor (2) is sent to the programmable counter. The frequency of the reference signal is changed while hiding the added frequency division factor.At this time,
The oscillation frequency of the reference signal A is above 1' = M, x (1(
f's). Here, ``■''8 is the rotation speed (Hz) when the turntable motor (3) is locked to the reference signal.

Koontaeb! The rotation speed of the remotor (3) is detected by the FG (7), and the turntable motor control circuit 0◆
is added to the motor control circuit a, and the reference value Δ given by Oa is also added to the motor control circuit a, and the motor control circuit σψ
The output of drives the motor (3). In this way, the turntable motor (3) is rotated in synchronization with the reference signal A.

The motor control circuit F6σ is configured as shown in FIG. That is, the reference signals A and li'G
Is the signal a phase comparator? An output signal corresponding to the phase difference between the two signals is generated at υ, passes through the filter (A), and is added to the power amplifier (A). The amplified output drives the turntable motor (3).

On the other hand, the reference signal A is the feed motor control circuit (c)
Also supplied. In order to move the recording pickup (4) according to the rotation of the turntable (2), the number of teeth M2 of the feed motor σQ (FGQ7), the feed stage (T)
The transmission ratio K must be taken into account. For this reason, the feed motor control path has an extra frequency conversion circuit compared to the turntable motor control circuit Q41. The reference signal B produced by this frequency conversion circuit (c) is added to the phase comparator (2) along with the "G" multiple, and the phase comparator (2) receives as many as 9 signals corresponding to the phase difference. The output of the phase comparator (2) is applied to a feed motor αQ via a filter (A) and a power amplifier (A), and moves the recording pickup via a feed stage (To).

By following this method, by controlling the feed motor aQ and the turntable motor (3), the C during recording is controlled.
Since LV operation can be easily realized, and digital scales 0υ generally have a long accumulation, and many measure relative distances magnetically or optically, recording is possible as shown in Figure @8. Any position outside the range (for example, the outermost circumference)
A Hall element (C) is installed at As the device undergoes changes, it is appropriate to preset the data to the scale.

Also, when attaching the disc (1) to the turntable (2), the scale may be preset automatically by moving it to the outermost position and resting on the plow of the Hall element (E) in this outermost position. .

In all the explanations up to Gin, the recording pickup (4) moves (as explained in M-set, the recording pickup (4 is fixed, turntable (2), turn tape I), and the disk (1) is moved. In case of digital reply
All you need to do is measure the position on the disk (1) with αυ and move the disk (1), motor (3), etc. with the feed stage [phase].

Also, as shown in the ninth prisoner, the linear velocity V. By digitally inputting the value from the outside to the microphone [1 processor Q color, it is possible to change the linear velocity within one disk (1), and the main part is digital, Since it is processed in a pulsed manner, it is stable in terms of temperature and steady state.

In addition, as shown in Figure 10, in one recording device, the CA and CLVO directions can be easily switched by switching the reference signal A to the external reference signal C using a changeover switch. I can do it.

The optical system has a scale that detects the radial position of the recording pickup, processes the digital output from this scale with a microprocessor, and changes the output of the microprocessor into a frequency. Since the motor of the rotating device and the motor of the feeding means are controlled based on the signal having the chest technique number, the constant linear velocity (CLV) of the recording device can be easily obtained.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the conventional example, Figure 2 is a characteristic diagram of the potentiometer used in the conventional example, Figure @3 is a characteristic diagram of the F-V converter used in the conventional example, and Figure @4 is the characteristic diagram of the F-V converter used in the conventional example. A block diagram showing one embodiment. Figure 5 is a detailed block diagram of the reference signal ordering circuit. Figure 6 is a detailed block diagram of the turntable motor control circuit. Figure 7 is a detailed block diagram of the feed motor control circuit. The figure is a configuration diagram when using a scale to measure relative distance, and Figure 9 shows linear velocity V from the outside. Figure 10 is a block diagram when inputting to a microprocessor.
FIG. 3 is a configuration diagram when performing LV cutting. (1) Disc, (3) Turntable motor, (4) Recording pickup, (5) Feeding means, (7) Frequency generator, θυ... Digital scale, (2)... Microprocessor - 1st grade... Reference signal brother l: E circuit, θΦ... Turntable motor controller circuit, 0th... Feed motor control circuit, QQ... Feed motor, U...Frequency generator, CI field...Crystal oscillator, (E)...Programmable counter, (C)...Hall element, wire...
・Monument, ni)... Changeover switch agent Todoroki Moto Sakuhiro Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 11 Figure 8 Figure 9 Figure 4 Figure 1O Figure 469-

Claims (1)

[Claims] 1. A rotating device that rotationally drives a disk-shaped record carrier, a recording pickup that records information on the disk-shaped record carrier, and a feeding device that moves the recording position of the recording pickup, A recording device that records information such as video signals and audio signals on a disk-shaped record carrier includes a scale that detects a recording position and digitally outputs data, a microprocessor that inputs the cheater and performs arithmetic processing, and a crystal oscillator. and a programmable counter, the output of the crystal oscillator and the output of the microprocessor being added to the programmable counter;
By changing the frequency division ratio, the frequency of the output signal of the reference signal generation circuit is changed, and the motor of the rotating device and the feed motor of the feeding means are controlled to be synchronized with the output signal of the reference signal generation circuit, and the disk radius Any 4XIiI above
A disk-shaped information recording device configured to record operating speeds such as t″i1′. 2. The scale for measuring the recording position is a length measuring device for measuring relative distances, and the distance outside the recording range of the disk-shaped record carrier is 2. The disk-shaped information recording device according to claim 1, wherein a reference value is input to the sub-length device when the recording position coincides with the reference point using an arbitrary point. 3. The first claim characterized in that the input data of the microprocessor is two data, recording position and linear velocity, and the linear velocity can be changed at any point of the recording position.
Disc-shaped information recording device as described in Section 1. 4. The output of the reference signal generation circuit is configured to be switchable from the outside to a constant angular velocity (UAV) signal, and is
The disc-shaped information recording device according to claim 1, characterized in that it is also capable of recording V.