JPS58205961A - Disc player - Google Patents

Abstract

PURPOSE:To smooth the shift of a head, by synthesizing a reproducing level detecting output of an information track with a track error signal detecting output so as to form a new track error signal. CONSTITUTION:A track error signal ET is given to an input terminal IN1 at first. A prescribed track error signal (b) is obtained from this error signal ET when a reproduced optical spot S moves to tracks T1, T2, T3. Further, a reproducing signal HF is applied to an input terminal IN2 together with the error signal ET when the signals on the tracks T1, T2, T3 are reproduced. Thus, when a shift pulse L or R is given while doing track servo, the phase of the track error signal is shifted gradually and stopped at a shift of one track's share. Then, the shift of one track is done in a time four times the time (t) of a monostable multivibrator. Thus, the shift of the head is done smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tinook player, and relates to the movement of the head of a digital, audio, multiplayer, video tinook, etc.

LD A is a bucket that reproduces the information of the Tinuk using an optical pickup.In #, the signal 1R recorded in the Nuviral format is reproduced as usual.Other than 4), when temporarily stopping th, the Tinuk is rotated once. Even in this case, it was necessary to move the original pickup in the direction of the disc on which the Nuviral nose track was recorded, correct it, and find the correct position k.

The conventional configuration for performing this kind of operation is to completely release the tracking servo and use the optical pickup to pick up the bulk of the worker.In addition to the tracking knob servo drive unit for moving mirrors and lenses, Tracking servo again without any time? By doing so, the original pickup is moved by one truck.

The wave height 1111 and the width of this warning party Barnu are constant and bamboo, so due to the eccentricity of Dinuku etc., the relative displacement @T* degree of the truck and the original pickup changes, which impairs reliability. There was. For this purpose, we added a large gun to the servo coil between the tracks of the optical pickup to lower the width of the lune and change the wave height, increasing the acceleration and increasing the relative speed such as eccentricity. I tried not to accept any example.

For this reason, the drive amplifier and original pickup became large and consumed a lot of weight.

The invention was made in view of the above drawbacks, and in the present invention, the voltage applied to the optical pickup is selected to be as large as the value when servoing a normal eccentric tinook, and the voltage applied to the optical pickup is set to 11IIj as in the conventional configuration. The first step is to obtain an engineered servo device without applying twice as much voltage.

For this reason, in the present invention, although there is no track servo without temporarily canceling the tracking servo, the reference position of the servo is moved and the C process is set so that the servo moves to the next track. be.

The present invention will be explained below with reference to the drawings. Figure 1 shows an example of a major block diagram, and Figure 2 shows the relationship between the first track and each error number in this explanation.

First, track error signal E is sent to the input terminal INI! Put in. The track error signal & track T l in Fig. 2
, T , , Ill s, if the playback source spot S moves '1'', the type of trunk error 4 shown in Figure 2 (b) will occur.
Boat No. 8 takes over.

Note that 1 is an amplification circuit for amplifying the track error signal.

Various methods for detecting such track error signals have been proposed in the past, including methods using three beams, jl! I
The details of the imitation output method will be omitted, since most people who use this method are well aware of it.

Also, the above track error signal F! along with the input end.

Ts, T! , '[Every reproduction when the signal of 1 is regenerated) IF' is added.

The reproduced signal lTh' is applied to the detection path 2 to obtain a voltage corresponding to the reproduced level.

Output of *a circuit 2 above &'! Track Tz, 'f'
2. 'I's (maximum value at Q center position, Track Fil, , III, Listen T3') ``2 If you select the smallest market pressure box with gold-like polarity in darkness etc. The maximum ratio in the center of the valley track is zero volts.
c (Add -■ of Pai, Anufu, and Pressure with the itching device 3 on stage K.

Output cover at this time, track l[t~T1 and spot S1
In response to ζ7T, the result becomes as shown in the 21st dH ・The above detection 1u
In addition to the inverting circuit 5, the second
The output shown in Figure C is applied to the third and fourth 'aJ change switches 8.9.

-Track error signal from Manzhenghi 1 Route 1 (Fig. 1 (
(B))) is applied to the first l'JK switch 6 and the inverting circuit 4 is inverted to invert the waveform Δ shown in FIG. The waveform output is
Add to change switch 7.

Earth distribution 1st to 4th C11 strange sweets f6~9 &:!
The outputs of the first to fourth variable switches 6 to 9 are fed to an adder circuit 10 and added, and the optical pickup is returned to the original track position and the outputs of the first to fourth variable switches 6 to 9 are controlled by an I controller 11. The track error No. 1g shown in ) is taken as track error number 1g.

In order to make this track error (No. 6 become Ov'), add the comparison amplification circuit 12 with the reference breakdown voltage section F by /JLI, amplify it, and move the source 7.

With this configuration, the first to fourth i=J changes switches 6 to 9 are controlled by the controller, and the track error signal (at the '2C)' k valley trough 1 T1. 'h,'r
s VC5t, 3 and any phase and 1/) are mutually exclusive.

In other words, younger brother 1's El change switch 6 is off 2nd to w
J3 variable switches 7, 8, 9 are off and tLt?
Since the track error signal (in Figure 1) is equal to the tracking signal (in) shown in Figure 1, G1 is the same as the tracking signal shown in Figure 1. I'm always being sidelined by a certain stick. Since only the third variable switch 8 is turned on and the track error signal corresponds to t-i in FIG. 7, the spot moves to the end of the track corresponding to P2.

At this time, the second and fourth (leather switches 7 and 9) are in the ゛ state!
When the PIA process is gradually attenuated and the variable switch 8 of the output line 3 is gradually turned from the OFF state to the interrogation state, the track error signal is shown in Figure 1 (B) ej. Go back to the middle of , and move to the position shown in the 11th step e).

Similarly, if only the second plexi switch 7 is turned off in the VC #C phono state, the formation of tJl (c4' 1
The position corresponds to the 4 points, and the fourth variable switch 9
If only is turned on, it will be the Ps position of the 21st horsefly),
Finally, if only the first pj history switch 6 is turned off, pt/in other words, Nuhot S in Figure 1 (b) will be 8.
Move to 9 - [Figures 3 and 4 are shown above]
, is a system diagram and a waveform explanatory diagram of the control device 11. In Figure 3, the input signal INK is input manually.

The l signal is added to the fourth OR circuit MOF (4 and flip-flop circuit) 1F1 and the t'L% 40th OR circuit 01 (+
The output is cascaded to the 11th to 3rd monostable multivibrator 11° ~ 1z, ~1
3 and the first to third OR circuits 0tt1. ORz
, 01 (enter 1 in s.

That is, the first OR circuit 01 (one input K) receives the output of the first monostable multibiflator M1 and the output of the second monostable 1-pull multibifurator Mx,
The output of the second monostable multivibrator M3 and the output of the third monostable multivibrator M3 are input to the input of the second OR circuit (Jltt).
The OR circuit 01vc is input to the output of 41M5 to the first, third, and third monomarine flakes. The output of the first OR circuit 01t1 and the output of the 711717071 circuit FFl are given to the input of the exclusive OR circuit hXx. gate circuit (G) is applied to the 10,000 inputs, and also to the 10,000 human power in the second gate circuit.

The output of the third OR circuit ORj forces the ladder divider circuit 13 [,
is added to the negative input power of the comparator circuit CI.

A triangular wave generator ζ4 manufactured triangular wave standard No. 45 Ps is given to the comparator circuit, and the output of the comparator circuit C is connected to the second inverter circuit I2 and the above-mentioned parts 1 and 2.
Add the output of the gate circuit (it, (3z's other input terminal IC) to the input of the 30th gate circuit <3s l/J-10,000.
Valve the first 1st route 11 to the input and the 4th
The gate circuit (, given to i4's single power.

- The output of the inverter circuit 12 of the hjll182 is applied with the input pressure of the third and fortieth gate circuits (is, (it), and the output of the inverter circuit 12 of the hjll182 is applied to the input pressure of the third and fortieth gate circuits (is, (it),
, the output of the middle G4 is applied to the gates of the rsl to fourth variable switches 6.7.8.9 shown in FIG. The signal is applied to the boost circuit IO through a filter circuit consisting of the following.

Before explaining the operation of the above-mentioned configuration, first refer to FIG.

The signal is manually applied to IN4 as a pulse as shown in FIG. 4 (2). Kakeru 4's Or IPI wl (missing JRa and the 1st to 3rd hair multivibrators i'vlt, Mz,
As shown in the waveform in Figure 4, Mz is faintly rμ, and the first and third mononutable multivibrators tAX
The output of the 30th OR circuit O1, which provides the third output, is added to the integral circuit 13, and the integrated output forms a triangular waveform as shown in Figure 0.

The triangular waveform is converted to the OPg iC in FIG. 4 of the triangular wave oscillator 14.
Select a time constant to outperform the FIG. 4 00 waveform CI'.

Next, considering the case where the moving pulse is only L, one input of the exclusive OR circuit C1 causes the output of the flip-flop circuit FFI to be a zero port because it is a reset output, and the other signal has the same phase. First, when the movement pulse LA is input, the first monostable multivibrator M1 operates 1, and since the second OR circuit 0kLt output &r is off at this time, the first and third gate circuits G1 and Qs Only the first gate circuit q1 is in the state t), and one object moves to the phantom while moving repeatedly, as shown in waveform 01' of the fourth diagram. When this pulse is modified to operate the 1-field effective transistor FET in the As it gradually becomes OFF state 9g, the output of -3 1μ'' variable null 7ch 8 becomes male 4 due to the third gate circuit Qs.
The waveform G3 iC shown in Figure σ) is shown in Figure 4 U.
The output increases as follows.Next, the mononudable multivibrator M2 of Ki2 operates, and the second gate circuit (32) starts operating as shown in 1Ilr1, and the second iJ father switch 7
As shown in Figure 4 ψ), it transitions to Or, at this time the third
The utility switch 8 is turned off. For Mr. 1d1, the third monostable multivar 1 brake unit M3 Pμ command!
'144's Ojf Nuitch is turned on as shown in Figure 4 (I), and as the mono-ru 4 Yo-ki Ibreme M3 Henohalnu waveform ends, the iC 1st QJ inu 1 tuna 6 increases. FC indicates that track error No. 1r4 has moved by one track. In addition, when the above ゛ and 1 (sama & c moving bapal) t are manually operated, the flip-flop circuit Fk'x is set and the exclusive sieve OR circuit becomes The conduction order of the third and fourth iJ change switches 8.9 is reversed, so that the track error Il+ and the third track Il+ and Eri3 are reversed. I'm going to move to the track + rs side.

Since the present invention is configured and operates as described above, even though it does not have a track servo, when the movement pulse L or It is input, the phase of the track error signal shifts in the same way, and is shifted by one track. For this reason, if you perform this operation once per rotation, you will be able to get a Nuviral-like track in order to get one track in one turn during the 4th cycle of Seven Nonu 1-Full Maruna Vibrator time. It can be stored in one place.

If the movement time 4i is almost longer than one revolution, then the head movement y, = kt') Kti, will not increase the gravity consumption and smooth movement will be possible. In addition, if the movement pulse L or ratio is increased and the movement time is short, the track can be moved precisely without applying the servo, and the track can be moved without any risk of errors. In this embodiment, the switch elements are gradually moved so that each switch is controlled by digital VC? lJe is 1st to gg4 1
:Il & switch 6.8,7,9. Even if you only turn the switches in the order of the hooks, the phase range of each error signal will become servo 0.
Since it is in the functional area, it is possible to create a waiting value that can be almost the same with a small number of circuits.

[Brief explanation of drawings]

Figure 1 is a system diagram of the Tinuku player of the present invention, Figure 26
) to) 5. Figure 1' is an enlarged plan view and waveform diagram of the truck for explaining the operation, Figure 3 is a system diagram of the controller shown in Figure 1,
Figure 4 - σ) is the waveform explanatory diagram in Figure 3, 1 + 1] circuit, 2 is the detection circuit, 3 is the booster, 4
．． 5 is an inverting circuit; 6. N', l (,9&Eng first position; 4's OJ Shunuitte, lOjikawa, m1 circuit, 11 is city i] - device soai. Patent applicant 8X Columbia closed ceremony center agent) Patent attorney Kazumi Yamaguchi, -.
Ut

Claims (1)

[Claims] -r tL F (-iT corresponding trunk error) from the information track This Tinuku player comprises a signal obtained by sequentially switching or combining the level adjustment means output and the track error signal detection output as a new track error 1 signal, and then servoing the main big amplifier.