JPH0281392A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To guarantee sure action with various action modes and to effectively utilize the power source by changing the checking level of a power source in accordance with the setting mode. CONSTITUTION:The checking level of a power source is changed in accordance with the setting mode. Namely, an operating part 11 to input the command in accordance with respective types of the mode of a system control circuit 10 has a mode switch 11-1 and the switch 11-1 switches the recording mode, reproducing mode and erasing mode. Namely, by discriminating the type of a power source device and setting the prohibiting voltage of recording, reproducing and erasing in accordance with the type of the power source, a suitable prohibiting voltage can be set for the power source device having a different capacity and the power source device having the different discharging characteristic and the action in respective action modes are made sure. Thus, the action at respective action modes can be made sure and the power source can be utilized effectively.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a recording or reproducing device.

[Conventional technology]

Traditionally, it has been an important requirement for portable electronic devices to be able to be powered by batteries, but especially for video tape recorders and electronic cameras, which have become rapidly popular in recent years, it has become difficult to take photos outdoors. In order to do this, reduction in size and weight and battery power are extremely essential elements. In addition, in places where electric power lines (referred to as AC power sources) are available, AC power sources can also be used to enable long-term recording, long-term playback of photographed image information, editing, etc.

In addition, in such video equipment, operations such as erasing are required to record, playback, and erase information on recording tracks that are no longer needed so that it can be recorded on those recording tracks again, and these modes are dependent on the equipment. They are installed depending on the purpose, but since the power consumption differs depending on the mode in which they are installed, it is necessary to consider the power supply voltage depending on the mode in which they are installed.

[Problem that the invention is trying to solve]

However, when using a battery as a power source, it goes without saying that you must always consider the battery life, but if the battery runs out during playback during shooting, the shooting operation may become impossible and you may miss a photo opportunity. However, when using batteries, it is necessary to take measures to minimize battery consumption, but simply increasing the capacity of the battery will result in the battery itself becoming larger and weighing less. There is a problem in that the small size and light weight, which are the characteristics of portable devices, are lost.

In addition, for example, in a device with an erase function, the power consumption during the erase operation is greater than the power consumption in the recording and playback operation modes, and when a battery is used as a power supply, the power capacity decreases during the erase operation, causing the , there is a problem that playback becomes impossible and important recording opportunities are missed.

Furthermore, compared to the recording operation, the reproducing operation continuously requires a certain amount of power consumption, and there is also a problem in that the power supply capacity decreases during the reproducing operation, making recording impossible.

In view of the above, it is an object of the present invention to provide a recording or reproducing apparatus that can ensure reliable operation in various operation modes and that can effectively utilize power.

[Means to solve problems]

In order to solve the above-mentioned problems, the present invention is an apparatus that performs recording, playback, or erase mode operation in each memory block of a storage means, and is characterized in that the power supply check level is changed according to the setting mode. do.

〔Example〕

In the embodiment of the present invention described below, the purpose is to solve the problems of the conventional example described above, and includes a means for detecting the voltage of the power supply section and a means for setting a plurality of reference voltages corresponding to recording, playback, and erasing modes. , and a control means that includes means for comparing the detected voltage of the power supply unit with a plurality of reference voltages, and limits the operation of the recording or reproducing apparatus in the set operation mode according to the output result of the comparison means. The present invention discloses a device that reduces power consumption when using a power supply device with limited power supply capacity and enables reliable operation in each operation mode by providing a means for identifying multiple power supply devices. A device is disclosed that enables reliable operation in each operation mode even for a plurality of power supply devices having different characteristics by changing the reference voltage level according to the identification result of the device.

An embodiment of the recording or reproducing apparatus according to the present invention will be described in detail above.

FIG. 1 is a block diagram of an electronic camera that records, reproduces, and erases image signals on concentric tracks formed on a rotating magnetic disk. In the figure, 1 is a magnetic disk as a recording medium, 2 is a magnetic head that moves in the radial direction of the rotating magnetic disk 1, and records, reproduces, and erases signals on tracks formed on the magnetic disk 1, and 3 4 is a motor that rotates the magnetic disk l; 4 is a motor servo circuit that controls the motor 3 to rotate the magnetic disk l at a constant speed; 5 is a motor that moves the magnetic head 2 in the radial direction of the magnetic disk 1; a head moving mechanism for positioning the magnetic head 2 on tracks formed in the same circular shape;
6 is a camera section formed from an optical system including a photographing lens, an aperture shutter, an image sensor that converts the image information photographed by the optical system into an electrical signal, and 7 is an FM modulation device for the electrical signal output from the camera section. a recording signal processing circuit that performs signal processing, converts the signal into a signal suitable for recording on the magnetic disk, and supplies the signal to the magnetic head 2 via Sul;
Reference numeral 8 denotes a reproduction signal processing circuit which receives a signal reproduced from a track on the magnetic disk 1 by the magnetic head 2 or is inputted via Su2, and performs signal processing such as FM demodulation and converts it into an original video signal. In other words, it is a reproduction signal processing circuit that outputs a video signal to a video signal output terminal.

Reference numeral 9 denotes an erase signal supply circuit that supplies an erase current to the magnetic head 2 via SWl. Reference numeral 10 denotes a system control circuit for controlling this device, which controls the aforementioned motor servo circuit 4, head moving mechanism 5, camera unit 6,
A recording signal processing circuit 7, a reproduction processing circuit 8, an erasure signal supply circuit 9, Sul, etc. are controlled.

Reference numeral 11 denotes an operation unit for inputting commands corresponding to various modes to the system control circuit IO, and a mode switch 11
-1, and the recording mode, reproduction mode, and erasing mode are switched by the switch 11-1. Reference numeral 12 denotes a display section for displaying information related to each mode by the system control circuit IO, as shown in FIGS. 7(a) and (b) described later.
As shown in the figure, the track number of the head 2 being maxelled and a warning of voltage drop are given. Reference numeral 13 denotes a power supply unit that supplies power to the apparatus, and each block of the apparatus is thereby supplied with power. 14 is a voltage dividing circuit that divides the power supply voltage output from the power supply unit 13 into %; 15;
16. 17, the signal output from the voltage divider circuit 14 is input to a child terminal, and one terminal has preset voltages Vl, V2 . This is a voltage comparison circuit to which V3 is input. Further, the output signals of the voltage comparison circuits 15, 16 and 17 are inputted to the system control circuit 10 described above.

The operation of the embodiment of the present invention will be explained in detail below.

First, the mode 5ull-1 provided in the operation unit 11 issues a recording mode setting command to the system control circuit 1.
0, the system control circuit 10
It is determined whether the output of the voltage comparison circuit 15 is High or Low. At this time, the voltage level A of the power supply voltage is input to the 10 input terminals of the voltage comparator circuit 15, and the voltage Vl, which is set in the power supply voltage level section where recording operation is prohibited, is input to one terminal. . When the output signal of the voltage comparison circuit 15 is at High level, it is determined that the voltage of the power supply section is higher than the voltage that prohibits recording operation, and the system control 10 drives the camera section, recording signal processing circuit, and motor servo circuit. and execute the recording operation. To execute the recording operation, the system controller IO controls the motor servo circuit 4 to rotate the magnetic disk 1 at a constant speed, controls the aperture, shutter, etc. of the camera unit 6, and records the image converted into an electrical signal by the image sensor. Information is input to the recording signal processing circuit 7 and Swl is connected to A, so that the signal output from the recording signal processing circuit is converted into an electric signal on the track of the magnetic disk l via the magnetic head 2. This is done by recording image information. When recording of track l is completed, system controller lO controls head moving mechanism 5 to move magnetic head 2 to an adjacent track.

Here, the system controller 10 again determines whether or not the next recording mode setting command has been input from the operation unit 11, and if the recording mode setting command has been input, the voltage comparison circuit 15 is The output signal is determined, and when the output is at a high level, the above-mentioned control is carried out (repeat).Also, when the recording to the last track on the magnetic disk 1 is completed, a recording mode setting command is input. The recording operation is not performed even if the display unit 12 is controlled by the system controller 10.
This displays the track address where the magnetic head 2 is located, and each time recording is completed and the magnetic head 2 moves to another track, the displayed content changes, and the track address where the magnetic head 2 is located is always displayed. The current track address is displayed. Next, a case will be described in which the output signal of the voltage comparator circuit 15 is at a low level when a recording mode setting command is input to the system control circuit 10 from the operation unit 11.

When the output signal of the voltage comparison circuit 15 is at a low level, it is determined that the voltage of the power supply section is lower than the voltage that prohibits the recording operation, and at this time the system controller 10 inhibits the recording operation. That is, in this case, it is prohibited to drive the motor servo circuit 4 to rotate the magnetic sheet l, it is also prohibited to control the camera section 6 and the recording signal processing circuit 7, and the recording operation sequence is started. There isn't. At this time, the system controller 10 displays the display unit 12.
・Display indicating that the power supply voltage is low by controlling Lb (
Low Battery) is displayed on the display section as shown in FIG. 7(a). Also, the system controller 10
continues to detect the output signal of the voltage comparison circuit 15 even during the recording operation, and if the output of the voltage comparison circuit 15 changes to Low level during the recording operation, the output signal of the voltage comparison circuit 15 is detected after recording of one track is completed. , the display unit 12 displays the above-mentioned display indicating that the power supply voltage is low. That is, once the recording operation is started, the system control circuit 1O performs control so that the recording is not stopped midway (and after the recording operation is finished, the recording operation is prohibited from being performed).

Next, a reproduction mode setting command is issued from the operation unit 11 to a mode Su (not shown) to the system control circuit lO.
We will explain the case where it is input. When a reproduction mode setting command is input, the system control circuit 10 determines whether the output signal of the voltage comparison circuit 16 is High or Low. A voltage corresponding to the section of the power supply voltage outputted from the power supply section is inputted to the ten input terminals of the voltage comparison circuit 16,
- A voltage level v2 of % of the power supply voltage that inhibits the reproduction operation is input to the input terminal. That is, the system control circuit 10 detects that the output signal of the voltage comparison circuit 16 is H4.
When detecting that the power supply voltage is at the gh level, the system control circuit determines that the power supply voltage level is higher than the voltage level that prohibits reproduction operation, and the system control circuit drives the motor servo circuit 4 to rotate the motor 3, thereby increasing the magnetic seam 1-1. Rotate at low speed. In addition, Swl is switched to B to control the playback signal processing circuit to operate. In other words, the playback signal is input from the track on the magnetic sheet l to the playback signal processing circuit 8 via the magnetic head 2 and Swl, and the playback signal is The signal processing circuit 8 outputs a reproduced video signal.

In addition, even during playback operation, the system control circuit 1
0 constantly detects the output signal of the voltage comparator circuit 16,
If the voltage of the power supply unit drops during the regeneration operation and reaches a level that prohibits the regeneration operation, the output signal of the voltage comparison circuit 16 becomes Low level, and when the system control circuit 10 detects this, the motor servo circuit is controlled to stop the rotation of the motor 3, and also to stop the operation of the reproduction signal processing circuit, thereby stopping the reproduction operation. At this time, the system control circuit IO is configured to display the display rLbJ on the display unit 12 indicating that the power supply voltage is low, as described above.
controls the display unit 12. Further, when the regeneration mode setting command is input to the system control 10 and the output signal of the voltage comparator circuit 16 is at a low level, the display section 12 displays a message "Lb" indicating that the power supply voltage is low without executing the regeneration operation. ” is displayed to indicate that the playback operation is prohibited.

Next, the erase operation will be explained. A setting command for the erasing operation is input to the system control circuit IO by the operation unit 11, but the erasing operation can only be executed when the apparatus is in the playback mode. That is, even if an erase operation setting command is input to the system control circuit 10 from the operation unit when the present apparatus is not operating in the playback mode, the erase operation will not be executed. When the erase operation setting command is input to the system control circuit 10 by the operation unit during execution of the playback mode, the system control circuit determines whether the output signal of the voltage comparison circuit 17 is at a high level or a low level. A voltage corresponding to & of the power supply voltage outputted from the power supply section is input to the ten input terminals of the voltage comparator circuit 17, and a voltage v3 corresponding to the power supply voltage that prohibits the erase operation is input to one terminal. It has been entered. In other words, when the output signal of the voltage comparison circuit 17 is at High level, is the power supply voltage level at which the erase operation can be executed?
When the power supply voltage is at the OW level, the system control circuit determines that the power supply voltage has dropped to a power supply voltage level at which the erase operation is prohibited. Output M of voltage comparison circuit 17; 6
(When the level is High, the system control 10 stops the operation of the reproduction signal processing circuit 8, connects Swl to C, and operates the erase signal supply circuit 9, thereby transmitting the erase signal to the magnetic field via Sul. input to head 2,
Erase one track on the magnetic sheet where the magnetic head is located. When the erasure of one track is completed, the system control circuit 10 stops the operation of the erasure signal supply circuit, connects Swl to B, and operates the reproduction signal processing circuit 8, so that the reproduction signal of the erased track, That is, the reproduction signal processing circuit 8 outputs random noise, and the completion of the erasing operation is confirmed.

In addition, when this device is in the playback mode and an erase operation setting command is input to the system control circuit 10 by the operation unit, if the output signal of the voltage comparator circuit 17 is at a low level, the power supply voltage is set for the erase operation. The system control circuit 10 indicates on the display that the power supply voltage is lower than the prohibited voltage level. rLbJ
The display unit 12 is controlled to display the following. At this time, the playback signal processing circuit 8 is operated without stopping the playback mode operation.
Therefore, the reproduced video signal continues to be output. In addition, the "Lb" display, which indicates that the power supply voltage has dropped to a level where the erase operation cannot be performed, continues only while the erase operation setting command is input from the operation panel. When the setting command is canceled, the system control circuit IO controls the display section to stop displaying "Lb".

Next, a case will be described in which a plurality of types of power supplies with different characteristics are used in the power supply section. First, a method for identifying a power supply device will be described.

3 to 6 are diagrams illustrating the case where the power source identification means identifies a battery and an AC power adapter. FIG. 3 is a perspective view of the battery, FIG. 4 is a perspective view of the AC power adapter, and FIG. 5 is a perspective view of the battery. 6 are perspective views showing a state in which an AC power adapter and a battery are installed in the battery storage section of the device, respectively.

In each figure, l is a battery compartment formed in the device, 2 is a battery installed in the battery compartment, and 3 is the same (the AC power adapter body is installed in the battery compartment and can supply power to the device; A plug 4 is arranged.A ten electrode 2a and a - electrode 2b are arranged on the upper surface of the battery 2.
On the corresponding top surface of the power adapter 3, ten electrodes 3a,
- Electrodes 3b are arranged, and one electrode, for example, one electrode 3b, is formed wider in the width direction than the electrode 2h of the battery 2.

On the other hand, when the battery 2 or the AC power adapter 3 is installed in the battery compartment l of the device, the ten electrodes 2a of the battery 2 or the ten power supply 3 of the AC power adapter 3 are inserted into the battery compartment l of the device.
+ side connection piece 5a connected to a.

Same (one side connection piece 5b connected to one electrode 2b of battery 2 or one electrode 3b of AC power adapter 3 is arranged as a power supply terminal, and when battery 2 is installed, As shown in FIG. 6, when the AC power adapter 3 is attached without contacting any electrode, it is connected to one electrode 3b formed wide as shown in FIG. When the battery 2 is installed, the connecting pieces 5a and 5b for power supply are connected to the corresponding electrodes 2a, 5c, respectively.
2b, but the identification connecting piece 5C only contacts the top surface of the battery and does not contact any of the electrodes.

On the other hand, when the AC power adapter 3 is attached, the connection pieces 5a and 5b for power supply are connected to the electrodes 3a and 3b, respectively.
a connecting piece 5b for connecting to the electrode 3b to form a power supply path and for connecting the identification connecting piece 5C to the electrode 3b;
5c is electrically connected by electrode 3b.

When battery 2 is installed in the battery compartment like this,
It is possible to electrically distinguish between the case where the power adapter 3 is attached and the case where the power adapter 3 is attached.

In the above-mentioned embodiment, a structure was described in which one electrode 3b of the AC power adapter 3 was widened to conduct the connecting piece 5b and the connecting piece 5c for identifying the power supply.
The power source 3a of the power adapter 3 may be made wider so that the connecting piece 5a and the connecting piece 5C for identifying the power source are electrically connected to each other.

Next, a case where the identification information of the above-mentioned power source identification means is actually used to control the operation mode of a recording or reproducing apparatus will be described by way of example with reference to FIG. 13, although the figure numbers may change.

FIG. 13 is a block diagram in which the identification information of the power supply identification means is used to control the operation mode of the recording or reproducing device.
Voltage comparator circuit 15 in the figure. 16. The voltage level input to one terminal of the power supply 17 is switched according to the identification information of the power supply.

In other words, when the power supply unit shown in Fig. 3 is set in the power supply unit, the detection signal provided in the power supply unit is not connected to one pole of the power supply unit, so it is pulled up by the resistor R1. 5w3, 3w4°, and 8w5 are switched and controlled by the detection signal, and Vl, V2, and v3 are connected to one input terminal of each voltage comparison circuit 15, 16, and 17. Furthermore, when the power supply device shown in FIG. 4 is set in the power supply unit, the detection signal is connected to one pole of the power supply device, so the detection signal becomes Low level, 5w3.3w4
．． 8w5 is connected to Vl', V2', and V3', and one input terminal of each voltage comparator circuit is connected to vl', ■2', and
3' is connected. In other words, depending on the type of power supply device, the prohibition voltage for recording, reproducing, and erasing may be Vl, V2, or V2. V3 or Vl
', V2', and V3'.

In addition, in this embodiment, a power supply device, a 12AC power adapter, and a battery are used to identify the power supply device and record the identification information.
I explained how to switch the prohibition voltage for playback and erasure, but
This is not limited to two types of power supply devices, but by changing the number and formation position of identification electrodes and connection pieces, it is possible to connect AC power adapters and multiple types such as N1CD batteries, lead batteries, alkaline manganese batteries, etc. By switching the voltage level input to one input terminal of the voltage comparator circuit for a power supply device, it is possible to set a prohibition voltage for recording, reproduction, and erasing corresponding to the characteristics and capacity of each power supply device.

Further, the method of identifying the power supply device is not limited to the method shown in the embodiment, and the type and method of the power supply may be determined by other methods, for example, by connecting a load to the power supply and determining the characteristics of the terminal voltage drop.

In addition, in the above-mentioned embodiment, when the power supply voltage falls below the operation prohibition voltage in each mode of recording, playback, and erasing, the display shown in FIG. 7(a) is displayed and the operation of each mode is stopped. As shown in FIG. 8, another set 15'-17' of the same configuration as 15 to 17 shown in the first figure is provided, and the reference voltages are set to Vl'V2' and V3' to the husband #1.
V1. V2. It is also possible to set the voltage to be slightly higher than V3, and to display a "6" mark on the display section 12 as shown in FIG. 7(b) in accordance with the outputs of the voltage comparison circuits 15' to 17'. In the display example shown in FIG. 7(b), "z8"
indicates the position of the head 2 on the disk l, and in the example shown in FIG. 7(a), such a position display segment is used to indicate 1-! =1 is displayed. This allows the configuration to be further simplified.

Next, we will explain the operation of the embodiment configured as shown in Fig. 8.
This will be explained using the flowcharts shown in FIGS. 9 to 12.

9 to 12 are flowcharts for explaining the operation of the system control circuit 10. FIG.

FIG. 9 is a flowchart illustrating the operation when the reproduction mode is set.

In this flow, it is first confirmed that the playback mode is set (S-1), and it is determined whether the output of the voltage comparison circuit 16 is "H" (5-3), and if it is not "H", the 5 to stop the motor 3 and stop the operation of the reproduction signal processing circuit to prevent abnormal operation due to voltage drop.
-5), and further display on the display unit 12 as shown in Fig. 7(a).
(S-7).

On the other hand, in S-3, if the output of the voltage comparison circuit 16' is 1H'', it is determined whether the output of the voltage comparison circuit 16' is ``H'' or not (5-9), and if it is H, the regeneration operation is performed. If the output of the comparator circuit 16 is not H, the display unit 12 displays a display as shown in FIG. 7(b) and the process proceeds to 5-13. does not stop the regeneration operation (continues it) until the regeneration mode setting is canceled or the comparator circuit 16 detects that the power supply voltage has decreased.

Next, the operation when the recording mode is set will be explained using FIG. 10.

In this flow, first confirm that the recording mode is set (S-15), and if the recording mode is set, determine whether the output of the voltage comparison circuit 15 is "H" or not (S-17). , if it is not "H", the operation of the recording signal processing circuit 7 and camera section 6 is stopped. Further, in this case, if the set mode is set to the reproduction mode, the motor 3 may continue to rotate because it may become operable. Nao 5
-19, the rotation of the motor 3 may be stopped in order to save power.

5-20 causes the display shown in FIG. 7(a) to be performed similarly to S-7. On the other hand, if the output of the voltage comparator circuit 15 is "H", it is determined whether the output of the voltage comparator circuit 15' is "H"(S-22); if it is not "H", it is the same as 5-11. The display shown in FIG. 7(b) is then performed (S-23).

In step 5-25, it is detected whether a recording level trigger is input, and when the trigger is input, recording control is started (S-25), and the camera unit 6 and the recording signal processing circuit are 7 to start recording.

Next, it is determined whether the recording operation has been completed (S-27), and if it has not been completed, it is determined whether the output of the voltage comparator circuit 15 is "H"(S-29); if it is not "H", the flag is L.
Set BIFLAG S-31), voltage comparison circuit 1
5' to determine whether the output is "H" S-33),
If it is not “H”, set the flag LB2FLAG.S
-35), if "H", the flow returns to 5-27. −
If it is determined in step 5-27 that the recording operation has ended, it is determined whether LBIFLAG and LB2FLAG are set. 5-37. S-39), LBIF
If LAG is set, the flow branches to 5-19, and if LB2FLAG is set, the display shown in FIG. 7(b) is performed similarly to 5-23, and the head 2 is moved one track (S -41), change the track number displayed on the display section 12 S-43), the flow is 5-1
Return to 5.

As described above, in the recording mode, even if a voltage drop is detected from the comparator circuits 15 and 15', after the recording operation is actually started by the recording trigger, until the recording/reproduction ends. Even so, the operation of the apparatus is not prohibited or a warning is displayed, and the above-mentioned prohibition or warning is displayed only after the recording operation is completed. As a result, the recording operation started once can be performed reliably.

Next, the operation when an erase operation is instructed will be explained using FIG. 11.

If an erasing operation is instructed, it is determined whether such an operation is instructed (S-51); if an instruction is given, it is determined whether or not a reproducing operation is in progress (S-53);
If the playback operation is in progress, the flow goes to 5-55. If the playback operation is not in progress, the flow returns to 5-51 so that the erase operation is not executed.

On the other hand, in 5-55, the output of the voltage comparison circuit 17 is “
If it is "H", the erase operation is started (S-57), and the output of the voltage comparison circuit 17 remains "H" until it is detected in step 5-59 that the erase operation is completed. Determine whether it is "H" (S-61), and if it is not "H", set flag LB2FLAG (S-63)
.

When the erasing operation is completed, it is determined whether the flag LB2FLAG is set (S-65), and if it is not set, the flow jumps to S-1 in FIG. If it has been set, the display shown in Figure 7(a) will be displayed to determine whether the erase operation has been instructed (S-67).
, if an instruction has been given, "Lb" on the display section 12
The display is canceled (S-70), and the flow branches to S-1 in FIG.

In the embodiment described above, when the start of the erase operation is instructed and the level of the power supply voltage is not higher than a predetermined level, the display unit 12 displays a message as shown in FIG. 7(b). Have them do it. Further, the above-mentioned display on the display section 12 is automatically canceled when the instruction to start the erasing operation is canceled.

Also, as explained in Figure 10, even if the power supply voltage drops during the erase operation, the erase operation is not controlled to stop or a warning is displayed (and such stop control or warning display is not performed after the erase operation is completed). I try to do this.

Further, in the embodiment shown in FIG.
Although the flow used only the output of the voltage comparator circuit 17 and 17' as in the flow shown in FIG. You can also do this.

Further, in the configuration shown in FIG. 8, the comparison circuits 15 to 17,
15' to 17', which makes the configuration complicated, but the warning voltage when displaying as shown in Fig. 7(b) in playback mode and the displaying as shown in Fig. 7(a) during erasing. The configuration can be simplified by making the prohibited voltages equal to each other.

In such a case, the flowchart shown in FIG.
The changes are made as shown in Figure 2. That is, in the flowchart of FIG. 11, it is determined that the output of the voltage comparison circuit 17 is "H" as 5-61, but in the flowchart of FIG.
It is only necessary to determine that the output of ' is "H".

Also, in the flowchart of Figure 11, 5-63.5
Although the flag LB2FLAG is used as -65, the flag LB3FLAG may be used in the flowchart of FIG.

[Other Examples]

FIG. 2 shows another embodiment of the voltage comparator circuit section.

Blocks in FIG. 2 that are the same as those in FIG. 1 are indicated by the same numbers, and explanations thereof will be omitted. Reference numeral 18 denotes a voltage comparison circuit, and the voltage comparison circuit 15.1 shown in FIG. 16. Similarly to 17, a voltage level of % of the voltage of the power supply unit is inputted. −
A recording inhibiting voltage level v1, a reproducing inhibiting voltage level v2, and an erasing inhibiting voltage level v3 are input to the car input terminal via 8w2.Switching of 8w2 is performed by the system control circuit 10, and the system control circuit 10 controls the power source 8w2 so that the prohibited voltage level corresponding to the operation mode commanded by the operation section 11 is input to one terminal of the voltage comparison circuit 18, and detects the output signal level of the voltage comparison circuit 18. The operation of this device is controlled by determining the voltage level. In addition, with the voltage level input to one input terminal of the voltage comparison circuit 18 being constant, the voltage level divided into sections of the power supply voltage input to ten input terminals is level-shifted in accordance with each mode of recording, playback, and erasing. It is clear that the same effect can be obtained even if

Although three types of voltages are shown in FIG. 2 as input to the ten input terminals, six types may be used as shown in FIG. 8, for example.

As explained above, by setting the prohibition level of the power supply voltage in recording, playback, and erase modes, it is possible to ensure operation in each mode under operating conditions with different power consumption such as recording, playback, and erase operations. can.

In addition, in this embodiment, by increasing the setting level of the prohibited voltage in the order of recording, playback, and erase modes, the capacity of the power supply device is Even when the camera's temperature decreases, recording is still possible, no important photo opportunities are missed, and the characteristics of an electronic camera can be brought out to the fullest. Furthermore, in the above embodiment, a device having three modes of recording, playback, and erasing has been described, but it is not necessary to have these three modes, and the present invention can be applied to any device having a plurality of modes. In addition, in this embodiment, by determining the type of power supply device, and setting the above-mentioned prohibition voltage for recording, playback, and erasing according to the type of power supply, power supply devices with different capacities can be applied. Furthermore, it is possible to set an appropriate prohibition voltage for power supply devices having different discharge characteristics, and operation in each operation mode can be ensured.

〔Effect of the invention〕

As explained above, according to the present invention, operation in each operation mode can be ensured, and power supply can be used effectively.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention, and FIG.
The figure is a block diagram showing another embodiment of the voltage comparison circuit, FIGS. 3 and 4 are perspective views showing the external appearance of the power supply device, and FIGS. 5 and 6 are perspective views showing the identification terminal of the power supply device. FIG. 7 is a diagram showing an example of a display by the display unit 12 shown in FIG. 1, FIG. 8 is a block diagram showing the configuration of another embodiment of the present invention, and FIGS. 9 to 12 are implementations shown in FIG. 8. Flowchart for explaining the operation of the example; FIG. 13 is a block diagram of a voltage comparison circuit according to another embodiment of the present invention; 1 is a magnetic disk; 13 is a power supply section; 15. 16. 1
7 is a voltage comparison circuit, and 10 is a system control circuit.

Claims (2)

[Claims] (1) A recording or reproducing apparatus that performs a recording, reproducing or erasing mode operation in each storage block of a storage means, and is characterized in that the check level of the power supply is changed according to the setting mode. (2) The check level is erase mode, play mode,
A recording or reproducing device characterized by having the highest recording mode in order.