JPS62200549A - Recording and reproducing device using non-volatile electric charge memory disk - Google Patents

Abstract

PURPOSE:To attain a stable recording and reproducing operation by constituting a device so that an electrode formed on one side of a recording and reproducing stylus reproduces a tracking reference signal regardless of an operation mode, and a crosstalk component from the electrode on the other side can be removed. CONSTITUTION:The recording/reproduction of a signal for a non-volatile memory disk D is performed with electrodes 2 and 3 provided on a recording and reproducing stylus S contacting slidably with the disk D. The titled device is constituted so that the electrode 3 is able to perform the reproducing operation of the tracking reference signal regardless of a set operation mode, and the recording and an erasing are performed by the electrode 2. At the electrode 3, a recorded recording signal, the tracking reference signal, and the signal which represents the reference rotating phase of the disk, etc., are supplied to a detection circuit DET as a change in an electrostatic capacity value. The crosstalk of the recording signal from the electrode 2 to the circuit of the electrode 3 is effectively removed by a resonance filter provided at the circuit DET, and the output of the circuit DET is supplied to BPFs 1-4 through an amplifier PA. Thus, the stable recording and reproducing operation can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recording and reproducing apparatus that can repeatedly record and reproduce information signals at a high recording density using a nonvolatile memory disk.

(Prior Art) A disc-shaped information recording medium (disc) has a simpler drive mechanism for the recording medium than other shapes of information recording media, such as tape-shaped or sheet-shaped recording media, and the structure of the playback device is simpler. In recent years, floppy disks, optical disks, It has come to be widely used in many applications in many fields as a type of disk that detects changes in capacitance value. ), a disc on which a user can record data only once (write-once type disc), and a rewritable disc (erasable disc on which data can be repeatedly recorded) are known.

The aforementioned read-only discs include optical discs and discs in which pits formed by protrusions or recesses corresponding to the information signals to be recorded are provided on the A and No. 1 sides of the disc. It has already been put into practical use as a type of disc that detects changes in capacitance value, and a playback-only disc is used as a recording device for producing master discs.

A large number of copies are made based on a high-density recording disk master made using a drive mechanism with high mechanical precision and a recording element feeding mechanism with high mechanical precision. A read-only disk can achieve high-density recording and playback of information signals by causing the playback element to faithfully follow the recording trace through tracking control during playback. However, with a read-only disc, it is not possible to erase the information signals recorded on it and record new information signals.

Furthermore, among the various types of discs described above, write-once discs on which information signals can be recorded only once also erase the information signals recorded on them and record new information signals, similar to the playback-only discs described above. It is not possible.

Recording (writing) and erasing information signals (rewriting information signals)
Magnetic disks have traditionally been the most commonly known disks that can be read and reproduced (non-destructively read), and have been put into practical use as storage devices in various devices.
Conventional magnetic disk drives rely on the mechanical precision of the magnetic head's feeding mechanism to create recording traces during recording.
Since the recording track was traced during playback, high-density recording and playback was not possible.

In recent years, as the demand for high-density recording of information signals on disks has increased, efforts have been made to obtain magnetic disk devices with high-density recording by narrowing the recording track and applying tracking control methods, for example, in Japanese Patent Laid-Open No. 55 -998
As disclosed in Publication No. 88, a proposal has been made to perform high-density recording and reproduction using a magnetic disk on which only tracking reference signals are recorded in advance, but this existing proposal does not allow recording. In addition to the drawback that a device with a complicated configuration is required to ensure that only the tracking reference signal is not erased when rewriting the content, the size of the magnetic gap is extremely large in order to achieve high-density recording with a magnetic disk. A minute magnetic head is required, but such a single magnetic head is difficult to manufacture.

Information signal recording (V included) and erasing (information signal rewriting)
Recently, as a disc with the possibility of playback (non-destructive reading), a phase change is caused in the recording layer of the disc by irradiation with a laser beam spot, making it possible to repeatedly record and play back information signals. Although discs have also been proposed, it has been pointed out that these types of discs currently have problems in weather resistance and that it is difficult to obtain a DIX recorder suitable for long-term storage.

Japanese Patent Application Laid-Open No. 58-1981 was first developed as a disc that can satisfactorily solve the problems of the various types of rewritable discs mentioned above.
There is a non-volatile charge memory disk disclosed in Japanese Patent No. 56245. That is, an insulating film having a charge W implantation function is provided on a semiconductor substrate, and a depletion region and a non-depletion region are formed, which correspond to a tracking reference signal and a signal indicating a reference rotational phase of the disk, respectively. A nonvolatile charge memory disk is a nonvolatile charge memory disk in which an array pattern is formed in advance on a semiconductor substrate in a state that is not erased during normal recording, reproducing, erasing, etc. operations, and this nonvolatile charge memory disk is i1!, which is provided on the recording and reproducing needle that rotates at When recording, reproducing, and erasing operations are performed through the pole, the recording/reproducing needle reproduces a tracking reference signal previously recorded on the nonvolatile charge memory disk, and the recording/reproducing needle is tracking-controlled based on the signal. As a result, information signals can be recorded and reproduced with an extremely narrow recording trace interval (track pitch).
In addition, since the electrode provided on the recording/reproducing needle used for recording and reproducing information signals can be configured to be extremely thin, recording and reproducing information signals with extremely short recording wavelengths is also possible. performed, therefore stably and V! High-density recording and reproduction can be performed in a freely replaceable state.

(Problems to be Solved by the Invention) However, as described above, an insulating film having a charge storage function is provided on a semiconductor substrate.

The semiconductor is in a state in which the arrangement pattern of depletion regions and non-depletion regions, which correspond to the tracking reference signal and the signal indicating the normal rotational phase of the disk, is not erased during normal recording, reproducing, and erasing operations. A non-volatile charge memory disk pre-formed on the substrate is rotated at a predetermined rotation speed, and a tracking reference signal reproduced by an electrode provided on a recording/reproducing needle that comes into sliding contact with the surface of the non-volatile charge memory disk is Based on the recording and playback needle 1
In a conventional recording and reproducing device that performs recording and reproducing operations while performing tracking control, the reproducing operation of the tracking reference signal and the recording operation of the information signal are performed in a time-sharing manner when the recording and reproducing device is in the recording mode. For example, it cannot be used in cases where the information signal to be recorded and reproduced must be continuous on the time axis, and the recording mode of the recording and reproduction device cannot be used. In some cases, a switching circuit that operates accurately as a switching circuit to time-divisionally perform the reproduction operation of the tracking reference signal and the recording operation of the information signal is required. Detection of the reference signal becomes impossible, and furthermore, since the switching circuit is connected to the resonant circuit of the high frequency signal in the capacitance value change detection circuit, the detection operation of the tracking reference signal is impaired due to an increase in stray capacitance. Shortcomings such as instability in some cases became a problem, and improvements were sought.

(Means for Solving the Problems) The present invention provides an insulating film having a charge storage function on a semiconductor substrate.
A film is provided, and an arrangement pattern of depletion regions and non-depletion regions corresponding to a tracking reference signal and a signal indicating a reference rotational phase of the disk is formed during normal recording, reproduction, and erasing operations. A non-volatile charge memory disk formed in large quantities on a semiconductor substrate in a state that will not be erased is rotated at a predetermined number of revolutions, and an electrode provided on a recording/reproducing needle that comes into sliding contact with the surface of the non-volatile charge memory disk is rotated. In a recording and reproducing device using a non-volatile charge memory disk in which recording and reproducing operations are performed through a non-volatile charge memory disk, a recording and reproducing needle that comes into sliding contact with the surface of the non-volatile charge memory disk is formed on the non-volatile charge memory disk. It is said that each individual electrode is provided in a front-back positional relationship with respect to the extending direction of the recorded trace, and is substantially parallel to each other.

Also, one of the two W1 poles mentioned above is 'R'.

It is connected to a reproducing circuit that is capable of at least reproducing the tracking reference signal regardless of the operating mode set in the recording/reproducing apparatus, and furthermore, it is connected to the reproducing circuit that is capable of reproducing at least the tracking reference signal regardless of the operating mode set in the recording/reproducing apparatus. a non-volatile device comprising means for preventing crosstalk components from being supplied to the regeneration circuit to the circuit of the electrode connected to the regeneration circuit based on the signal supplied to the other electrode of the poles; A recording and reproducing device using a charge memory disk is provided.

(Example) Hereinafter, specific contents of a recording/reproducing apparatus using a nonvolatile charge memory disk of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of a recording/reproducing apparatus using a nonvolatile charge memory disk of the present invention. In FIG. 1, D is a nonvolatile charge memory disk, and this nonvolatile The charge memory disk D is driven and rotated by a drive motor M at a predetermined rotation speed. 12 is a non-volatile charge memory disk D
This is a clamper for fixing the drive motor M to a turntable (not shown) fixed to the rotating shaft of the drive motor M.

The above-mentioned non-volatile charge memory disk D includes a semiconductor substrate Si and a first insulating film made of a thin oxide film formed on the above-described semiconductor substrate Sik, as shown in the cross-sectional view illustrated in FIG. io, a second insulating film N made of a nitride film formed on the first insulating film O, and vapor deposition of aluminum formed on the back surface of the semiconductor substrate SL.
It is composed of A.

The semiconductor mentioned above! ! , on the WS, for example, a silicon single crystal thin plate having an n-type conductivity type or a silicon amorphous thin plate (a silicon single-crystal thin plate having a p-type conductivity type or an amorphous silicon thin plate may be used). is used. As described above, when a silicon single crystal thin plate or silicon amorphous uF2 is used as the semiconductor substrate Si, the first insulating film 0 described above is a silicon oxide film, and the second insulating film 0 is a silicon oxide film. N is nitrogen.

It is a silicon oxide film.

In FIG. 5, D/', DA, .

DA... is a depletion in the arrangement pattern of depletion areas and non-depletion areas that correspond to the tracking reference signal to be recorded in advance on the nonvolatile memory disk D and the signal indicating the reference rotational phase of the disk, respectively. If a monocrystalline thin plate of silicon or an amorphous thin plate of silicon is used as the silicon substrate Si, the depletion area DA,
DA... is used to implant till elementary ions accelerated to, for example, 10 to 100 K a V into a silicon substrate Si to a depth of several hundred nm through a mask pattern having a predetermined pattern, and then activate them later. It can be easily formed by converting it into

FIG. 6 shows the tracking reference signal recorded in advance in the silicon substrate Si of the nonvolatile memory disk D by a predetermined arrangement pattern of depletion areas A, DA, etc. and non-depletion areas and the rotational phase of the disk reference. 6 is a diagram explaining the recording area of the signal shown in FIG. 6, and the curve shown as a solid line in FIG. The curve shown by a line is the recording area of the other one of the two types of tracking reference signals, Fp2, and the curve shown by a broken line shows the reference rotational phase of the disk D (No. 8 F
This is the recording area of p3.

FIG. 7 shows the two types of tracking signals Fpi, F
p2 and No. 48 Fp indicating the reference rotational phase of disk D.
3 is a frequency allocation diagram illustrating the mutual frequency relationship between the recording signal FM recorded on the disk D, and
No. 8 is the above-mentioned two types of towing signals Fpl,
Fp2 and a signal Fp indicating the reference rotational phase of the disk D.
In order to explain the mutual arrangement relationship with E in Fig. 6,
FIG. 2 is an enlarged view of a portion. In Figure 8,
Areas R, R, etc. sandwiched between the respective recording traces of the two types of tracking signals Fpl and Fp2 are areas where recording signals are to be recorded, and the frame indicated by the dotted line in Figure 1 is the area R mentioned above. In addition, S in Figure 1 is a recording/reproducing needle, and this recording/reproducing needle S is transmitted through a support (cantilever) as shown in Figure 1. Actuator ball of tracking control system
The recording/reproducing needle S can accurately track the recording trace by being driven and displaced by the ACT as will be described later.

A signal Fp3 indicating the reference rotational phase of the disk D described above.
is recorded at a specific radial position on the disk D, and the signal Fp3 is used for determining the timing of polarity switching of the tracking control signal generated based on the tracking reference signal, and for other purposes.

It is used to determine the timing of the operation of the recording/reproducing device.

Recording of recording signals on the nonvolatile memory disk D and reproduction of signals recorded on the nonvolatile memory disk D are performed using two electrodes provided on the recording/reproducing needle S that comes into sliding contact with the nonvolatile memory disk Di. 2.3. FIG. 4(tl) is an enlarged perspective view of the vicinity of the tip of the main body 1 of the recording/reproducing needle S, and FIG. 4(b) is an enlarged perspective view of the tip of the recording/reproducing needle S. FIG. 4 is an enlarged plan view of the dependent surface 4, and as shown in FIG. Each individual W1 is in a front-back positional relationship with respect to the extending direction and is approximately parallel to each other.
Furthermore, one of the two TTT poles 2 and 3 mentioned above, FFI pole 3, is independent of the operating mode set in the recording/reproducing device. , is connected to a reproducing circuit that is capable of at least reproducing the tracking reference signal.

The other electrode 2 of the two electrodes 2 and 3 records the recording signal applied thereto on the nonvolatile memory disk D, and erases the recorded information on the nonvolatile memory disk D by the erasing signal supplied thereto. Used to eliminate green lights.

The information signal to be recorded (for example, an audio signal or an audio signal) supplied to the terminal 5 in FIG. By supplying the voltage to the electrode 2 of the recording/reproducing needle S after the voltage is amplified to a voltage that is equal to the voltage of Record No. 48 is recorded as an array pattern of accumulated charges corresponding to . In FIG. 9, a recording/reproducing needle S is in sliding contact with the surface of a nonvolatile charge memory disk D under tracking control operation, and its electrode 2 is irL! It is a diagram showing a state in which a recording signal is recorded as an accumulated charge in a nitride film N of a non-volatile memory disk D by applying a voltage according to a recording signal. The part indicated by the frame indicates the accumulated charge generated in the nitride film N in response to the recording signal).

Among the two electric currents t42°3 of the recording/reproducing needle S slidingly contacted on the surface of the nonvolatile memory disk D as described above,
The electrode 2 used for recording <rt is made so that the electrode 144rlj at the end of the electrode is substantially equal to the recording path of the recording signal to be recorded,
In addition, the electrode 3 for reproducing the signal recorded on the nonvolatile memory disk D is slightly widened so that the electrode III covers the recording trace of the tracking reference signal provided on both sides of the recording trace of the information signal. (See Figure 8).

On the other hand, among the two electrodes 2.3 at J'9 of the recording/reproducing needle S that slides into contact with the surface of the nonvolatile memory disk D, it is used to reproduce the recording signal recorded on the disk D. In TTF pole 3, non-volatile memory disk °D
Nitriding of 0. The recording signal recorded in the JN as an accumulated charge according to the recording signal, the tracking reference signal recorded as an array pattern of depletion areas and non-depletion areas on the nonvolatile memory disk D, and the rotational phase of the disk reference. It simultaneously detects the signals shown as changes in capacitance value,
The change in capacitance value is given to the detection circuit DET.

FIG. 2 shows a specific configuration example of the three-dimensional circuit of the detection circuit DET, and FIG. 3 is an equivalent circuit diagram of the three-dimensional circuit shown in FIG. In the detection circuit DET shown in FIGS. 2 and 3, O20 is an oscillator, CL is a coupling line, RES is a resonator, RSF is a resonant filter, and SD is a detection circuit. G
The high frequency oscillation wave of Hz is transmitted from the inductor L1 to the inductors ■ and 2 of the resonator RES via the coupled inductor CL.
guided by.

Among the two electrodes 2.3 of the recording/reproducing needle S that is in sliding contact with the surface of the nonvolatile memory disk D, the terminal T1 at one end of the resonator RES is connected to the record 4 recorded on the disk D.
Since the electric field 3 used for reproducing No. 4 is connected, it corresponds to the recording signal and tracking reference signal recorded on the nonvolatile memory disk D, as well as the signal indicating the reference rotational phase of the disk. The resonant frequency of the resonator RES changes due to the change in the capacitance value that occurs.

Thereby, the high frequency signal supplied to the resonator RES is
The amplitude is modulated in accordance with the change in the resonant frequency that changes with the change in the capacitance value.

The amplitude-modulated high-frequency signal is guided from the inductor L2 to the inductor L3 of the resonant filter R5F, but the resonant frequency of the resonant filter R8F is equal to the frequency of the high-frequency oscillation wave generated by the oscillator O8C. It is set.

The resonance filter R8F extracts only the amplitude-modulated high-frequency component at a frequency of about IGHz from the signal supplied to it from the resonator RES.

When the recording/reproducing apparatus is in the recording mode, a high voltage recording signal is supplied to the electrode 2 of the recording/reproducing needle S. It is unavoidable that the recording signal crosstalks to the circuit of the electrode 2, but the crosstalk of the recording signal from the electrode 2 to the electrode 3 circuit can be effectively removed by the resonance filter R8F.

The amplitude modulated wave of the high frequency signal output from the resonant filter R8F is amplitude demodulated by the detection circuit SD, and is sent to the terminal T2.
to the preamplifier PA.

The signal fed to the preamplifier PA described above is amplified by the preamplifier PA and then passed through the bandpass filters BPFI~
Be supplied to B P F4.

The signal extracted by the bandpass filter B T' F4 is:

This is the recording signal (frequency modulated wave signal) shown as FM in Fig. 7, and this signal undergoes the necessary signal processing in the demodulation circuit OEM, and is sent to the output terminal 6.7 for recording. Information signals (for example, video signals and audio signals) are output.

Also, the signal extracted by the bandpass filter BPFI is
The tracking reference signal Fpl shown as FPI in FIG. 7, and the signal extracted by the bandpass filter l3PF2 is the tracking reference signal Fp2 shown as Fp2 in FIG. The signal extracted by the bandpass filter WB P F3 is the seventh
The signal Fp3 shown as Fp3 in the figure indicates the reference rotational phase of the disk.

The signal Fp3 indicating the reference rotational phase of the disk extracted by the bandpass filter BPF3 described above is generated by two types of tracking which are sequentially and alternately recorded every revolution of the disk, as shown in FIG. Reference signal FPI, Fp2
Therefore, the signal Fp3 indicating the reference rotational phase of the disk extracted by the above-mentioned bandpass filter BPF3 is rectified and smoothed by the detection circuit DET:1, and then sent to the switching pulse generation circuit XPG. By being supplied as a trigger signal, a switching pulse is given from the switching pulse generation circuit XPG to the changeover switch SW.

Further, the tracking reference signal Fpl extracted by the bandpass filter BPFI and the tracking reference signal Fp2 extracted by the bandpass filter BPF2 are fixed to different fixed signals via input terminals 8 and 9 of the changeover switch SW, respectively. given at the contact point.

Therefore, as the movable contacts in the changeover switch SW are switched for each revolution of the disk by the changeover pulses generated by the changeover pulse generation circuit XPG, the movable contacts in the changeover switch SW are connected to the respective output terminals 10.11 of the changeover switch SW. The tracking reference signal Fpl and the tracking reference signal Fp2 are sequentially and alternately switched and output at the position of the reference rotational phase for each rotation of the disk.

As a result, two types of tracking reference signals Fpl and Fp which are sequentially and alternately recorded as shown in FIG.
The polarity of the tracking control signal, which will be described later, is generated based on the above-mentioned number 2 and is always maintained correctly for each round of the disk.

The above-mentioned tracking reference signal Fpl and tracking reference signal Fp2 are transmitted through a detector DET2. L) E'r
After being rectified and filtered by differential amplifier DA, the signal is rectified and filtered by differential amplifier DA, and is then outputted from differential amplifier DA to tracking control circuit TSC. Tracking control circuit T
In the SC, the tracking error signal is subjected to phase compensation and then power amplified to obtain a tracking control signal, which is then applied to the 7 actuator ACT of the tracking control system so that the recording/reproducing needle S always correctly follows a predetermined recording trace.

(Effects) As is clear from the above detailed explanation, the recording/reproducing device using the nonvolatile charge memory disk of the present invention is provided with an insulating film having an ffl back accumulation function on a semiconductor substrate, and , the semiconductor is in a state in which the arrangement pattern of depletion regions and non-depletion regions, which correspond to the tracking reference signal and the signal indicating the reference rotational phase of the disk, respectively, is not erased during normal recording, reproducing, and erasing operations. A non-volatile charge memory disk pre-formed on a substrate is rotated at a predetermined rotational speed, and recording and reproducing operations are performed via electrodes provided on a recording and reproducing needle that comes into sliding contact with the surface of the non-volatile charge memory disk. In a recording/reproducing apparatus using a non-volatile charge memory disk.

The recording and reproducing needles that come into sliding contact with the surface of the non-volatile charge memory disk are positioned in front and back in the extending direction of the recording traces formed on the non-volatile charge memory disk, and are substantially parallel to each other. In addition, one of the two electrodes is capable of reproducing at least the tracking reference signal regardless of the operating mode set in the recording and reproducing device. The circuit of the electrode is connected to a regeneration circuit adapted to perform the operation, and is further connected to the regeneration circuit described above based on the signal supplied to the other of the two electrodes described above. In the recording/reproducing apparatus using this non-volatile charge memory disk, two crosstalk components provided on the recording/reproducing needle are provided. The tracking reference signal is always supplied to the reproduction circuit by one of the electrodes, and the signal supplied to the other of the two electrodes provided on the recording and reproduction needle is Based on this, crosstalk components to the circuit of the electrodes connected to the above-mentioned playback circuit are prevented from being supplied to the above-mentioned playback circuit, so no matter what operating mode the recording/playback device is operating. , in order for the tracking reference signal to be regenerated in good condition,
The tracking control operation performed on the recording and reproducing needle S described above is performed regardless of the operating mode of the recording and reproducing device, and the recording signal is continuous on the time axis. Even it's recording and playback operation can be carried out well under tracking control,
In addition, the tracking reference signal can be reproduced well even if the disk has uneven rotation, and the reproduction operation of the tracking reference signal and the recording operation of the recording signal are performed in a time-sharing manner, which is necessary. There is no need for additional switching circuits, and it is possible to easily provide a recording and reproducing apparatus that can perform stable recording and reproducing operations with a simple configuration.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the general +q configuration of a recording/reproducing bag using a non-volatile charge memory disk of the present invention, Figures 2 and 3 are circuit diagrams of a detection circuit, and Figure 4 is a diagram of a recording/reproducing needle. Explanatory drawings, Fig. 5 is an enlarged sectional view of a part of the nonvolatile charge memory disk, Fig. 6 is a plan view of the nonvolatile charge memory disk, Fig. 7 is a frequency distribution diagram of signals, and Fig. 8 is a diagram of the nonvolatile charge memory disk. Tracking reference recorded on memory disk 4
FIG. 9 is a plan view illustrating an arrangement pattern such as No. 8, and a side view showing a nonvolatile charge memory disk and a recording/reproducing needle. D...Nonvolatile charge memory disk, S...Recording resealing, M...Drive motor, Si...Semiconductor substrate, 0
...first insulating film, N...second insulating film, A...
Aluminum vapor deposition film, DA...depletion region, ACT...
・Tracking control system actuator, FMM...
Frequency modulator, RA...recording amplifier, DE'r:...
Detection circuit, O20...high frequency oscillator, CL...coupling line, RES...resonator, R8F...resonance filter,
S1)...Detection circuit. PA...Preamplifier, B P Fl-11P I"
4... Bandpass filter, DETI to DET3... Detector, TSC... Tracking control circuit, SW... Changeover switch, 1... Main body of recording/reproducing needle, 2, 3... Electrode, 4...Sliding surface, Patent applicant: Victor Japan Co., Ltd. Agent: Takao Imama, patent attorney 1'・4 No. 1
- To...

Claims (1)

[Claims] An insulating film having a charge storage function is provided on a semiconductor substrate, and an array pattern of depletion regions and non-depletion regions is provided, each of which corresponds to a tracking reference signal and a signal indicating a reference rotational phase of the disk. A non-volatile charge memory disk, which is pre-formed on a semiconductor substrate in a state that is not erased during normal recording, reproducing, erasing, etc. operations, is rotated at a predetermined number of rotations and is brought into sliding contact with the surface of the non-volatile charge memory disk. In a recording and reproducing device using a non-volatile charge memory disk in which recording and reproducing operations are performed through electrodes provided on the record and playback needle, a recording and reproducing needle that slides into contact with the surface of the non-volatile charge memory disk. The non-volatile charge memory disk is equipped with individual electrodes that are positioned in front and back in the extending direction of the recording trace formed on the non-volatile charge memory disk and are substantially parallel to each other. Further, one of the two electrodes described above is connected to a reproducing circuit that is capable of at least reproducing the tracking reference signal regardless of the operation mode set in the recording and reproducing device. Further, crosstalk components to the circuit of the electrode connected to the regeneration circuit based on the signal supplied to the other of the two electrodes are not supplied to the regeneration circuit. A recording and reproducing device using a non-volatile charge memory disk, comprising means for