JPH0685238B2 - Control circuit of magnetic recording / reproducing apparatus - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control circuit of a magnetic recording / reproducing apparatus for locating a desired recording portion by using a non-recording portion of a magnetic tape.

(Prior Art) In recent years, when a magnetic tape is played back by a magnetic recording / playback apparatus, in playing back a music tape or the like in which a plurality of songs are recorded, it is sometimes desired to find the beginning of the song in order to play the desired song. The cue is performed by detecting an unrecorded portion existing between songs. For example, it detects a non-recorded portion several or several previous to the song currently being listened to, and when the desired non-recorded portion is detected, the high-speed feed state is automatically switched to the replay state again. .

In a device with a cue function in such a state, when setting the number of unrecorded parts before and after the currently listened song and performing automatic cue selection, a plurality of indicators are displayed. There is something to use.

Hereinafter, an example of the control circuit of the above-described conventional magnetic recording / reproducing apparatus will be described with reference to the drawings.

FIG. 7 shows a control circuit of a conventional magnetic recording / reproducing apparatus. In FIG. 7, 1 is a reproduction signal input terminal, 2 is a non-recording part detection signal generation circuit, 701 and 702 are switches, and 102 and 60
5,606 are drive plungers, and 601,602,603 are indicators.

The operation of the control circuit of the magnetic recording / reproducing apparatus configured as described above will be described below.

When the switch S is pressed once, the contacts of the switches 701 and 702 are switched from a to b, and when it is pressed twice, the contacts of the switches 701 and 702 are switched from b to c. Next, when a reproduction signal is input to the reproduction signal input terminal 1, the non-recording portion detection signal generating circuit 2 outputs a positive pulse signal in the non-recording portion as shown in FIG. 2 (b). , 608, turning on the drive plunger 606, switch 701,7
The contact point of 02 is switched from c to b, and the contact points of the switches 701 and 702 are switched from b to a when a signal from the non-recording portion is applied for the second time. Next, in the third signal, the signal of the non-recording portion is added to the transistor 101, the driving plunger 102 is operated, and the operation of the tape recorder is switched from the high speed operation to the normal reproducing operation or the reproducing operation is stopped. . That is, the drive plunger 102 is operated by the signal of the non-recording portion for the third time until the contact point a, and the cueing operation of the third music can be performed.

(Problems to be solved by the invention) However, in the conventional device, there is a limit to miniaturization because it has switching of mechanical contacts, and malfunction is likely to occur even in a miniaturized electronic circuit. There was a problem.

In view of the above problems, the present invention provides a control circuit for a magnetic recording / reproducing device that is compact and eliminates malfunctions.

(Means for Solving the Problems) In order to solve the above problems, the control circuit of the magnetic recording / reproducing apparatus of the present invention causes the output state to be inverted from the first state to the second state or to the second state according to an input signal. To a first state and stores and holds this state until the next input signal is input, a first memory circuit, a second memory circuit, a third memory circuit, a fourth memory circuit, a fifth memory circuit, and A first memory device including a second memory circuit and a third memory circuit, a second memory device including the fourth memory circuit and a fifth memory circuit, a first display circuit for operating a display, and a first memory device. A second display circuit, a third display circuit, a first circuit that operates to output a signal when a display circuit other than the first display circuit is no longer in an operating state, and a song from a playback signal of the magnetic memory playback device. Non-recording that detects a non-recording part between songs and generates a signal A section detection signal generating circuit, a switch for outputting a signal for setting a non-recording section each time a number of operations corresponding to the number of the non-recording sections existing up to a desired music piece is operated, and the magnetic recording / reproducing apparatus. A drive circuit for controlling the operation, wherein one output end of the second storage circuit is connected to one input end of the third storage circuit, and the other output end of the second storage circuit is connected to the third storage circuit. A circuit is connected to each of the other input terminals of the circuit so as to apply a signal, and from one output terminal of the fourth memory circuit to one input terminal of the fifth memory circuit, and the other output terminal of the fourth memory circuit. To the other input terminal of the fifth memory circuit so as to apply a signal, respectively, and from one output terminal of the first circuit to one input terminal of the first memory circuit, and the other of the first circuit. From the output end to the other input end of the first storage circuit Are connected to each of the third storage circuits from one output end of the third storage circuit to one input end of the second storage circuit, and from one output end of the fifth storage circuit to the fourth storage circuit. One input end of the first storage circuit is connected to one input end of the second storage circuit, and one output end of the third storage circuit is connected to one input end of the third storage circuit. The output of the non-recording portion detection signal generation circuit when the third storage circuit or the fifth storage circuit is connected to one input end of the fourth storage circuit so as to apply a signal, respectively, and is in the second state. From the end, an output signal of the non-recording portion detection signal generating circuit or a signal for setting the non-recording portion from the output end of the switch is applied to one input end of the second storage circuit or the fourth storage circuit. Connected and said When first memory circuit or said third storage circuit is in the second state,
The non-recording section setting signal is connected from the output end of the switch so as to be applied to the other input end of the second storage circuit or the fourth storage circuit, and the output end of the second storage circuit is connected to the second storage circuit. One of the input terminals of one circuit, and the fourth
An output terminal of the memory circuit is connected to the other input terminal of the first circuit so as to apply a signal, respectively, and an output terminal of the first circuit is connected so as to apply a signal to the input terminal of the first display circuit. , A signal is applied from the output end of the second storage circuit to the input end of the second display circuit, and a signal is applied from the output end of the fourth storage circuit to the input end of the third display circuit. When the signal is output from the switch, the first display circuit, the second display circuit, and the third display circuit are sequentially operated one by one to determine the number of the song being listened to. Whether or not the non-recording portion is selected is displayed, and each time the signal is output from the non-recording portion detection signal generating circuit, the third display circuit, the second display circuit, and the first display circuit are provided one by one. Are operated in sequence, and the first display circuit is Wherein said driving circuit and the signal is further output from the unrecorded portion detection signal generating circuit is characterized in that it operates while work.

(Operation) According to the present invention, the control circuit of the magnetic recording / reproducing apparatus can be miniaturized because it is composed of an electronic circuit, and by providing two storage circuits in the storage device,
It is possible to eliminate a malfunction when the magnetic recording / reproducing apparatus is controlled by operating a switch or a non-recording portion signal.

(Embodiment) Hereinafter, a control circuit of the magnetic recording / reproducing apparatus of the present invention will be described based on an embodiment.

FIG. 1 is a circuit diagram showing a first embodiment of the present invention.
In the figure, 1 is a reproduction signal input terminal, 2 is a non-recording portion detection signal generating circuit, 3 is a gate circuit which constitutes the first circuit, and 4 is an inverting circuit. Reference numeral 5 is a first memory circuit composed of, for example, a flip-flop circuit. Is the first
The memory device is formed of the second memory circuit 6 and the third memory circuit 7. Further, is a second memory device, and is composed of a fourth memory circuit 8 and a fifth memory circuit 9. 10 is the second gate circuit, 11 is the third gate circuit,
Reference numeral 12 is a fourth gate circuit, 13 is a fifth gate circuit, 14 is a sixth gate circuit, 15 is a seventh gate circuit, 16 is a power supply circuit, 17 is a drive circuit, and 18 is a reset circuit.

In such a configuration, when a voltage is applied to the + B terminal, a voltage of about 2.1V is output to the output point F of the power supply circuit 16. That is, each of the four diodes 252-255 is approximately
It shows a voltage drop of 0.7V, which is about 2.8V.
Since the contact voltage between the base and emitter of 251 is reduced by 0.7 V, 2.8−0.7 = 2.1 (V). In addition, the voltage applied to the + B terminal is also applied to the capacitor 260,
A charging current flows through the capacitor 260 via the resistor 259 in the reset circuit 18, and the transistors 257 and 258 are turned on. As a result, the bases of the transistors 48 and 60 of the second and fourth memory circuits 6 and 8 are negatively biased, so that the second and fourth memory circuits are
The Q output of 6,8 becomes a low voltage (hereinafter referred to as L voltage). Therefore, the transistors 48 and 60 are turned off, the collectors of the transistors 48 and 60 are set to a high voltage (hereinafter referred to as H voltage), and the bases of the transistors 49 and 61 are turned to H voltage and turned on via the resistors 46 and 58. At the same time, their collectors (Q) become the L voltage. Therefore, the gate circuit 12,1
The emitters of transistors 77 and 84 of 4 are transistors 49 and 61.
It is connected to and becomes the L voltage. Also transistors 77,8
The base of 4 is connected to point A via resistors 76 and 85,
Since the point A is biased to the H voltage via the resistor 270, as a result, the transistors 77 and 78 are turned on, and the bases of the transistors 54 and 66 become negative, so that the transistor 54,
66 is turned off, transistors 55 and 67 are turned on, the output Q of the third and fifth memory circuits 7 and 9 becomes L voltage, and the third and fifth memory circuits
The memory circuits 7 and 9 are reset.

Therefore, the bases of the transistors 34 and 35 of the gate circuit 3 are biased by the L voltage of the outputs Q of the second and fourth memory circuits 6 and 8, and the transistors 34 and 35 are turned off, so that the gate circuits thereof are turned off. The output Q of 3 is H voltage.

A second storage device and a second storage device
When the Q outputs of the fourth storage circuits 6 and 8 are both at the L voltage, that is, when they are reset to the initial state, the Q output of the gate circuit 3 is at the H voltage. In this way, when the Q output of the gate circuit 3 becomes the H voltage, the transistor 202 that constitutes the display circuit is turned on, and the indicator constituted by the light emitting diode 203 connected to this transistor also becomes O.
N, but the transistors 205 and 208 that make up the display circuit
Since it is OFF, the light emitting diode 20 connected to these
6,209 is OFF.

Further, in this case, since the pace of the transistor 37 of the inverting circuit 4 is biased to the H voltage by the resistor 36,
The transistor 37 is turned on, and the Q output of the inverting circuit 4 becomes the L voltage. Therefore, since the emitter of the transistor 69 of the gate circuit 10 has the L voltage and the base has the H voltage due to the bias from the point A, the transistor 69 is turned on, the transistor 43 of the memory circuit 5 is turned off, and the transistor 42 is turned on. Is turned on, and the Q circuit of the memory circuit 5 becomes H voltage.
Therefore, the other memory circuits 6, 7, 8 and 9 are in an inverted state.

In such a state, when the switch S is pressed and turned on, the transistors 92 and 93 are turned on, so that the voltage at the points A and B changes from the H voltage to the L voltage. Since the Q output of the memory circuit 5 is H voltage, the base of the transistor 73 of the gate circuit 11 is also H voltage, and since the emitter is connected to the point B, it is L voltage. As a result, the transistor 73 is turned ON, The transistor 49 of the memory circuit 6 is turned off and the transistor 48 is turned on. As a result, the Q output of the memory circuit 6 becomes H voltage, turning on the transistor 205 connected to the light emitting diode 206 and turning on the light emitting diode 206. At the same time, the Q output of the memory circuit 6 sets the base of the transistor 35 of the gate circuit 3 to the H voltage, so that the transistor 35 is turned on and the Q output of the gate circuit 3 becomes the L voltage. Therefore, the transistor 202 and the light emitting diode 203 are turned off, and the Q output of the inverting circuit 4 becomes H voltage.

On the other hand, the Q output of the memory circuit 6 becomes H voltage, and the gate circuit
Since the emitter of the 12th transistor 77 is connected to the H voltage, and the base is connected to the point A which is at the L voltage by the ON of the transistor 92 via a resistor,
Remains OFF, so the state of the memory circuit 7 does not change. Further, since the L voltage of the output of the memory circuit 7Q is applied to the base of the transistor 81 of the gate circuit 13, since the transistor 81 is OFF, the states of the other memory circuits 8 and 9 do not change.

On the other hand, the Q output of the inverting circuit 4 is at the H voltage when the switch S is held down.
Since the base of 69 is at the L voltage at the point A via the resistor 71, the transistor 69 is OFF and the Q output state of the memory circuit 5 remains at the H voltage before the switch S is pushed and does not change. That is, by pressing the switch S, the light emitting diode 203 of the display is turned from ON to OFF,
206 changes from OFF to ON, and the light emitting diode 209 remains OFF. Then, the Q output of the gate circuit 3 changes from the H voltage to the L voltage, the Q output of the memory circuit 6 changes from the L voltage to the H voltage, the Q output of the memory circuit 5 remains the H voltage, and the memory circuit 7 The Q outputs of 8, 8 and 9 remain at the L voltage.

Next, when the contact is turned off by releasing the switch S, the transistors 92 and 93 are turned off, and the points A and B become the H voltage, that is, the voltage at the point F applied through the resistors 270 and 271. The base of the 12th transistor 78 has an H voltage, and the emitter has an L voltage. That is, the emitter of the transistor 78 is connected to the output of the memory circuit 6, that is, the collector of the transistor 48, and the transistor 48 is in the ON state to have the L voltage. Therefore, the transistor 78 is turned on, the transistor 55 of the memory circuit 7 is turned off, the transistor 54 is turned on, and the Q output of the memory circuit 7 becomes H voltage. The H voltage, which is the Q output of the memory circuit 7, makes the base of the transistor 81 of the gate circuit 13 the H voltage. However, since the H voltage at the point B is applied to the emitter of the transistor 81, the transistor 81 is turned off. Therefore, the state of the memory circuit 8 does not change.

On the other hand, since the Q output of the gate circuit 3 is L voltage, the emitter of the transistor 68 of the gate circuit 10 becomes L voltage,
Since the base becomes H voltage, the transistor 68 is turned on, the transistor 42 of the memory circuit 5 is turned off, and the transistor 4 is turned on.
3 is turned on, and the Q output of the memory circuit 5 changes from H voltage to L voltage. Therefore, when the switch S is released and turned off, the Q outputs of the memory circuits 6 and 7 become H voltage,
The Q output of the gate circuit 3 and the Q outputs of the storage circuits 5, 8 and 9 become L voltage, and only the light emitting diode 206 of the display is turned on and the other light emitting diodes 203 and 209 are turned off.

Next, when the switch S is pressed again, the Q output of the memory circuit 8 is set to L by the gate circuit 13 by the same operation as described above.
The voltage changes to the H voltage, and the transistor 208 and the light emitting diode 209 are turned on. At this time, the transistor 35 of the gate circuit 3 is turned from ON to OFF and the transistor 34 is turned ON, so that the Q output of the gate circuit 3 remains at the L voltage.

Then, when the switch is released and turned off next, the Q output of the memory circuit 9 is changed from the L voltage to the H voltage by the gate circuit 14, and the Q output of the memory circuit 7 is changed from the H voltage to the L voltage by the gate circuit 12. .

Further, when the switch is pressed to turn it on for the third time, the Q output of the memory circuit 8 is changed from the H voltage to the L voltage by the gate circuit 13, so that the light emitting diode 209, which is an indicator, is turned off.
Then, the transistor 34 of the gate circuit 3 is turned off, and its Q output changes from the L voltage to the H voltage. Therefore, the transistor 202 and the display 203 are turned on.

Next, when the switch S is released and turned off, Q of the memory circuit 9
The output is reset from the H voltage to the L voltage by the gate circuit 14, and the Q output of the memory circuit 5 is set to H by the gate circuit 10.
The voltage changes from the L voltage to the L voltage, which causes the initial reset state. When the switch S is further pressed in such a state, as described above, the light emitting diodes 203 to 206, and
It turns on in order to 209.

At this time, as shown in FIG. 6, the first memory circuit 5, the third memory 5
Considering the case where the memory circuits 7 and 9 and the gate circuits 10, 12 and 14 do not exist, when the switch S is pressed, the transistor 73 is turned on when the Q output of the gate circuit 3 is H voltage.
Then, the transistor 49 in the memory circuit 6 is turned off, the transistor 48 is turned on, the Q output becomes the H voltage, and the gate circuit 3
Q output becomes the L voltage. Then, since the Q output of the memory circuit 6 becomes the H voltage, the transistor 81 is turned on, the transistor 61 in the memory circuit 8 is turned off, the transistor 60 is turned on, and the Q output of the memory circuit 8 also becomes the H voltage. Therefore, a single operation of the switch S causes a malfunction in which the Q outputs of both the memory circuits 6 and 8 become the H voltage, and both the light emitting diodes 205 and 208 are turned on.

However, in the present invention, for the second and fourth memory circuits 6 and 8 whose states are changed by turning on the switch S,
Since the first, third, and fifth memory circuits 5, 7, 9 that change the state when the switch S is released and turned OFF are also provided, only one display unit is always turned ON and malfunction Is prevented.

Next, the operation of the control circuit of the magnetic recording / reproducing apparatus configured as described above will be described. Since the magnetic recording tape has a recording section and a non-recording section as shown in FIG. 2 (a), such a magnetic tape is reproduced by a magnetic recording / reproducing section (not shown) to input a reproduction signal. When input to the terminal 1, the non-recording portion detection signal generating circuit 2 outputs a positive pulse signal in the non-recording portion as shown in FIG. Now, when the Q output of the memory circuits 8 and 9 which constitute the second memory device is the H voltage, the light emitting diode 2
If a positive pulse signal is applied to point D due to the presence of an unrecorded part when 09 is ON, the transistor 9
Since 5,97 is turned on, points A and C are at the L voltage.
On the other hand, since the Q output of the memory circuit 9 is the H voltage, the base voltage of the transistor 88 of the gate circuit 15 is the H voltage and the emitter of the memory circuit 9 is the L voltage.
When turned on, the base of the transistor 49 of the memory circuit 6 becomes L voltage, and the Q output of the memory circuit 6 becomes H voltage. As a result, the transistor 205 and the light emitting diode 206 are turned on. At the same time, the Q output of the memory circuit 9 sets the base of the transistor 82 of the gate circuit 13 to the H voltage and the emitter of the gate circuit 13 to the L voltage of the point A. Therefore, the transistor 82 is turned on and the base of the transistor 60 of the memory circuit 8 is set to the L voltage. Therefore, the memory circuit 8 is reset, the Q output becomes the L voltage, and the transistor 208 and the light emitting diode 209 are turned off.

Next, when the positive pulse signal based on the non-recording portion disappears, one voltage changes to the other voltage, for example, the H voltage changes to the L voltage, and the transistor 95 is turned off. Since the base of the transistor 78 is at H voltage and the emitter of the transistor 78 is at L voltage because the transistor 48 is ON, the transistor 78 is ON, the base of the transistor 55 of the memory circuit 7 is L voltage, and the memory circuit 7 is Inversion, the Q output becomes the H voltage. At the same time, the base of the transistor 84 of the gate circuit 14 is at the H voltage, and since the transistor 61 is ON, the emitter of the transistor 84 is at the L voltage. Therefore, the transistor 84 is ON and the base of the transistor 66 of the memory circuit 9 is connected. The memory circuit 9 is reset to L voltage and the Q output is set to L
The voltage.

Thus, when the positive pulse signal is applied to the point D and then this is removed, the light emitting diode 209 to the light emitting diode 206 are removed.
The display operation moves to.

Then, when the next positive pulse signal is applied to the point D, the points A and C become the L voltage, the transistor 74 of the gate circuit 11 is turned on, and the memory circuit 6 is turned on for the same reason as described above. Reset to bring its Q output to the L voltage. As a result, the transistor 205 and the light emitting diode 206
At the same time when it is turned off, the transistors 34 and 35 of the gate circuit 3
Since its base has an L voltage, its Q output has an H voltage, and the transistor 202 and the light emitting diode 203 are turned ON.
Then, when the positive pulse signal applied to the point D disappears, the points A and C become the H voltage, and the Q output of the inverting circuit 4 becomes the L voltage.
Turns on. As a result, the Q output of the memory circuit 5 becomes the H voltage and the output becomes the L voltage.

Until now, when the light emitting diodes 206 and 209 which are indicators were turned on, the output of the memory circuit 5 was at the H voltage, so the transistor 100 was turned on.
The positive pulse signal applied to the point was grounded at the midpoint between the resistors 98 and 99, and the positive pulse signal was not input to the drive circuit 17 of the tape recorder.

While the second positive pulse signal is being applied, the output of the memory circuit 5 remains at the H voltage even if the ON operation of the display moves from 206 to 203. Is still ON and the positive pulse signal at the point D was not input to the drive circuit 17.

However, when the second positive pulse signal disappears and the third positive pulse signal is applied to point D,
Since the output of the memory circuit 5 is at the L voltage, the transistor 100 is in the OFF state, so that a positive pulse signal is input to the drive circuit 17 and the transistor 101 is turned ON.
Then, a drive current flows through the plunger 102 that switches the operation of the tape recorder, and the plunger 102 operates. By the operation of this plunger, the operation of the tape recorder is switched from a high-speed reproduction operation generally called cue or review to a normal reproduction operation, or stopped. That is, as described above, the switch S
By operating the light emitting diode 20 which is the third indicator.
If 9 is set to ON, the third positive pulse signal, in other words, switching the tape recorder operation from high-speed playback to normal playback or stopping it in the third non-recording section Is automatically performed and, for example, a tape on which music or the like is recorded can be used for the cueing operation of a song.

When the third positive pulse signal is input, the Q outputs of the storage circuits 6, 7, 8 and 9 are at the L voltage, so the Q output of the storage circuit 5 remains at the H voltage and does not change. In this state, even if the fourth positive pulse signal and the fifth positive pulse signal are input, the same operation as the third operation is performed, the positive pulse signal is applied to the drive circuit 17, and the memory is stored. circuit
Since the states of 6, 7, 8, 9 and the memory circuit 5 do not change, the light emitting diode 203 which is the first display remains ON.

As described above, in the present embodiment, when the first indicator 203 is turned on, the drive circuit 17 operates in the first unrecorded section, and the second indicator 206 is turned on. The second non-recording part, the third indicator 20
When 9 is turned on, the drive circuit 17 is operated in the third non-recording section, and the operation of the tape recorder can be changed.

As described above, not only the memory circuits 6 and 8 are operated by the voltage (H or L voltage) of one of the signal based on the switch operation and the signal based on the non-recording portion, but also the other voltage (L or L) of the signal. The H voltage) eliminates the malfunction due to the two actions of operating the memory circuits 5, 7, and 9.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, when the portion surrounded by the alternate long and short dash line is made into an integrated circuit, a light emitting diode 305 which constitutes a fourth display is added to the first to third display 203, 20.
It is possible to use only part 6,209 or switch it so that the first to fourth indicators 203, 206, 209 and 305 can be activated. Therefore, in the second embodiment, sixth and seventh memory circuits similar to the fourth memory circuit 8 and the fifth memory circuit 9 used in the first embodiment.
Gate circuit 1 similar to 800,900 and gate circuits 13,14,15
30,140,150, further transistors 307,311,312, resistor 3
06, 308, 310, 313 are added, a transistor 316 and a resistor 317 are added to the reset circuit 18, and a transistor 318 and a resistor 319 are added to the gate circuit 3. In such a structure, the switch S is pressed to press the first, second and third light emitting diodes 203, 206, 20.
The operation until 9 is turned on is the same as that of the first embodiment. Since the terminal 304 is set to the H voltage via the resistor 306, when the switch S is pressed the third time, the transistor 311 is turned on, the collector of the transistor 311 becomes the L voltage, and the gate circuit 130 causes the memory circuit 800 to operate. Q output of becomes the H voltage. As a result, the transistor 307 and the light emitting diode 305 serving as the fourth indicator are turned on, and the gate circuit 13 causes the Q output of the memory circuit 8 to be an L voltage.

Next, when the switch S is released and turned off, Q of the memory circuit 9
The output becomes the L voltage, and the Q output of the memory circuit 900 becomes the H voltage. Then, when the switch is pushed next time, the light emitting diode 305 which is the fourth indicator is turned off and the first light emitting diode 203 is turned on. In this way, by operating the switch S, the four indicators can be sequentially turned on.

Further, when the light emitting diode 305 and the resistor 306 connected to the terminal 304 of the fourth indicator are removed and the terminal 304 is grounded to the L voltage, the transistor 312 remains held OFF. Even if the switch S is operated, the memory circuit 80
The Q output of 0,900 remains at the L voltage, the fourth light emitting diode 305 does not turn on, and the indicators are the 1st, 2nd, 3rd, 1st, 2nd,
The cycle operates as in the first embodiment.
That is, in the second embodiment, the number of display devices can be switched to either 4 or 3 simply by operating the terminal 304, so that the number of terminals can be reduced as in the case where the control circuit is integrated. Even when the number is small, it is very convenient because the operation mode can be switched. Note that when the number of terminals is large, the base of the transistor 312 may be connected to another independent terminal.

As described above, the transistor 318 and the resistor 319 are added to the gate circuit 3, and the memory circuit 6,8,800 is added.
The Q output of the gate circuit 3 is configured to be the H voltage when the Q output of is the L voltage. Also reset circuit
By adding the transistor 316 and the resistor 317 to 18, the memory circuit 800 is reset when the power supply + B is turned on.

Next, the operation of the control circuit thus configured will be described. Now, by operating the switch S, the fourth display 305 is turned on.
Suppose you have N. At this time, when the positive pulse signal as described above is applied to the point D, the third display 209 is turned on and 4
The positive pulse signal at point D is input to the drive circuit 17 with the th positive pulse signal, and the plunger 102 is driven as described above.

If the switch S is provided with a differentiating circuit composed of resistors 501 and 503 and a capacitor 502 as shown in FIG. 4, H generated when the switch S'is pushed as shown in FIG. The voltage pulse or the L voltage pulse generated when the switch S ′ is released makes it possible to control the transistors 92, 93 and 311 and protect the transistors 92, 93 and 311 from damage due to excessive power.

As described above, the first circuit, the first memory circuit, at least two memory devices, the non-recording section detection signal generation circuit, and the first, second, and third display circuits are provided, and By providing two storage circuits, one storage device can easily select the beginning of a desired piece of music by operating a switch and a non-recording section signal, and can eliminate malfunctions.

[Brief description of drawings]

FIG. 1 shows the first part of the control circuit of the magnetic recording / reproducing apparatus of the present invention.
2 is a circuit diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the relationship between the recording mode of the magnetic tape and the output of the non-recording portion detection signal generating circuit, and FIG. 3 is a diagram of the magnetic recording / reproducing apparatus of the present invention. FIG. 4 is a circuit diagram showing a second embodiment of the control circuit, FIG. 4 is a circuit diagram showing another embodiment of the switch section, FIG. 5 is a waveform diagram showing its output, and FIG. FIG. 7 is a circuit diagram for explaining an example, and FIG. 7 is a circuit diagram of a conventional example. 1 ... Reproduction signal input terminal, 2 ... Non-recording part detection signal generating circuit, 3 ... Gate circuit, 4 ... Inversion circuit, 5 ... First
Memory circuit, 6 ... second memory circuit, 7 ... third memory circuit, 8 ... fourth memory circuit, 9 ... fifth memory circuit,
10 to 15 ... Gate circuit, 16 ... Power circuit, 17 ... Driving circuit, 18 ... Reset circuit, 800 ... Sixth memory circuit, 900
...... Seventh memory circuit, 130,140,150 …… Gate circuit, 20
3,206,209,305 …… Light emitting diode, S …… Switch.

Claims (1)

[Claims] 1. A first state in which an output state is inverted from a first state to a second state or an input state is inverted from a second state to a first state and the state is stored and held until the next input signal is input. A first memory circuit, a second memory circuit, a third memory circuit, a fourth memory circuit, a fifth memory circuit, a first memory device including the second memory circuit and a third memory circuit, and the fourth memory circuit And a fifth memory circuit, a second memory device, a first display circuit for operating the display device, a second display circuit, and a third memory device.
A display circuit, a first circuit which operates so as to output a signal when a display circuit other than the first display circuit is no longer in an operating state, and a non-recording interval between songs from a reproduction signal of a magnetic recording / reproducing apparatus. A non-recording portion detection signal generating circuit that detects a portion and generates a signal, and a signal for setting a non-recording portion each time a number of operations corresponding to the number of non-recording portions existing up to a desired music piece is operated. A switch for outputting and a drive circuit for controlling the operation of the magnetic recording / reproducing apparatus are provided, and one output end of the second memory circuit is connected to one input end of the third memory circuit, and the second memory is also provided. The other output terminal of the circuit is connected so as to apply a signal to the other input terminal of the third memory circuit, and the one output terminal of the fourth memory circuit is connected to the one input terminal of the fifth memory circuit. Also, from the other output end of the fourth memory circuit The fifth memory circuit is connected so as to apply a signal to the other input terminal of the fifth memory circuit, from one output terminal of the first circuit to one input terminal of the first memory circuit, and the other input terminal of the first circuit. The output terminal is connected so as to apply a signal to the other input terminal of the first memory circuit, and the one output terminal of the third memory circuit is connected to the one input terminal of the second memory circuit, and the fifth memory circuit is also connected. A signal is connected from one output terminal of the memory circuit to one input terminal of the fourth memory circuit, and from one output terminal of the first memory circuit to the other input terminal of the second memory circuit. Further, the third storage circuit or the fifth storage circuit is in a second state, which is connected so as to apply a signal from one output end of the third storage circuit to the other input end of the fourth storage circuit, respectively. In this case, the non-recording portion detection signal The output signal of the non-recording part detection signal generating circuit from the output end of the raw circuit or the signal for setting the non-recording part from the output end of the switch is input to one input end of the second storage circuit or the fourth storage circuit. When the first storage circuit or the third storage circuit is in the second state, the signal for setting the non-recording portion is output from the output end of the switch. 4 memory circuit is connected to the other input terminal so that the output terminal of the second memory circuit is connected to one input terminal of the first circuit, and the output terminal of the fourth memory circuit is connected to the first circuit. Is connected to each of the other input terminals so as to apply a signal, and is connected so that a signal is applied from the output terminal of the first circuit to the input terminal of the first display circuit, and from the output terminal of the second memory circuit. Second display time Is connected so that a signal is applied to the input end of the switch, and a signal is applied from the output end of the fourth memory circuit to the input end of the third display circuit, and each time a signal is output from the switch. The first display circuit, the second display circuit, and the third display circuit are sequentially operated one by one to display the number of the non-recording section selected from the song being listened to, and the non-recording is performed. Every time a signal is output from the unit detection signal generation circuit, the third display circuit, the second display circuit, and the first display circuit are sequentially operated one by one, and the first display circuit is operating. The control circuit of the magnetic memory reproducing apparatus, wherein the drive circuit operates when a signal is further output from the non-recording portion detection signal generating circuit.