KR910003573Y1 - Turntable recording control circuit using automatic music program sensor - Google Patents

Abstract

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Description

Turntable Recording Control Circuit Using Automatic Music Program Sensor

1 is a circuit diagram of the present invention.

* Explanation of symbols for main parts of the drawings

20: regenerative amplifier 21: head

22: recording and playback amplifier 23: main amplifier

24: bias circuit 25: motor

26: magnet 27: AMPS

SP: Speaker SW1: Mode Selection Switch

LS1, 2: 1st, 2nd leaf switch

SW2-1, SW2-6: 1-6 recording / playback switch

Q1-Q5: Transistor C1-C7: Capacitor

R1-R14: Resistance

The present invention relates to an audio system having a turn table and a tape recorder, and more particularly to a circuit for controlling recording when audio information recorded on a disc is reproduced by a turn table and recorded on a tape. will be.

Normally, the amount of audio information of the disc played by the turntable is 40-45 minutes in total for both sides of the disc, and the amount of audio information that can be played or recorded by the tape recorder is about 60 minutes in total for both sides of the tape. If the information is recorded on one side of the tape, there will be about 10 minutes of blank space left, and there will be residual noise due to the non-information section that does not contain information between the sections containing the information of the disk while the audio information of the disk is not terminated. This occurred and there was a problem of recording on the tape.

Therefore, an object of the present invention is to record the residual noise generated by the disc non-information section on the tape by using the Automatic Music Program Sensor (AMPS) when recording the voice information on the tape. It is to provide a turntable recording control circuit using AMPS that can be prevented.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a circuit diagram of the present invention, and a mode selection switch SW1 for selecting a turntable, a radio or a tape recorder mode according to a listener's selection, and a first power source B + is supplied by the mode selection switch SW1. A reproduction amplifier 20 for amplifying and outputting the audio signal input from the pickup, a head 21 for recording the audio signal on the tape or reading out the audio signal recorded on the tape, and recording through the head 21; A recording and reproducing amplifier 22 for amplifying the reproduced voice signal, and a main amplifier 23 for amplifying and outputting the output of the reproducing amplifier 20 or the recording and reproducing amplifier 22 through a speaker SP. And a bias circuit 24 for generating and supplying a fixed waveform of a reference frequency when writing to the head 21, and by a first power source B + applied from the mode selection switch SW1 when selecting a turntable mode. The regenerative amplifier A first level adjusting means composed of a resistor R1, a capacitor C1, and a diode D1 for raising the output of the output to a predetermined level and transmitting it to the main amplifier 23 in one direction; and selecting a tape recorder mode. In response to the first power supply B + applied from the mode selection switch SW1, the output of the recording / reproducing amplifier 22 is raised to a predetermined level so that the resistor R2 transmits in one direction to the main amplifier 23. And second level adjusting means comprising a condenser C2 and a diode D2, and an external play key and a recording key, and outputting the output of the first level adjusting means. The output of the recording / reproducing amplifier 22 in association with the first recording / reproducing switch SW2-1 and the first recording / reproducing switch SW2-1 for transmitting to the input terminal of the terminal 22; The audio signal generated by the head 21 or the audio signal generated by the head 21 The second recording and reproducing switch SW2-2 transmitted to the input terminal of the controller 22 and the first recording and reproducing switch SW2-1 interlock with each other to form a waveform of the bias circuit 24 in the head 21. The third recording and reproducing switch (SW2-3) and the first recording and reproducing switch (SW2-1) to transmit the output of the recording and reproducing amplifier 22 to the second gain control means or the second The first power supply B + is supplied to the bias circuit 24 in association with the fourth recording and reproducing switch SW2-4 and the first recording and reproducing switch SW2-1 transmitted to the second recording and reproducing switch SW2-2. Fifth recording and reproducing switch (SW2-5) for controlling the supply of the < RTI ID = 0.0 >, < / RTI > motor 25 for driving the tape, the play key and recording key of the wabu, the rewind key and the fast forward key. The first power switch B1 supplied to the recording / reproducing amplifier 22 and the motor 25 when the forward power is selected, and the fast forward operation (B) a magnet 26 for resetting the selected fast forward key or recording key during a recording operation, and a first power source B + from the first leaf switch LS1 at the time of fast forward or recording in conjunction with an external fast forward key or recording key; ) And a second leaf switch LS2 supplied to the magnet 26 and a first power source applied from the mode selection switch SW1 through a diode D3 or D4 during a turntable operation or a tape recorder operation. The AMPS 27 which generates a voice signal presence signal by inputting the output of the reproducing amplifier 20 or the recording and reproducing amplifier 22 from the first or second level adjusting means by (B +). And a transistor for adjusting the detection time of the AMPS 27 by the mode selection switch SW1 by operating on the first power source B + applied from the mode selection switch SW1 during the tape recorder operation. AMPS adjusting means comprising Q1 and a capacitor C3 and two resistors R5 and R6, and a transistor Q2 and a resistor for driving the magnet 26 in accordance with the presence / absence detection signal of the AMPS 27. And a plurality of transistors Q3-Q5 and resistors R8-R11 for controlling the operation of the motor 25 according to the voice driving signal of the AMPS 27 during the turntable operation. And a first power supply B + from the mode selection switch SW1 to supply to the motor control means when the turntable is operated in conjunction with the motor control means composed of the motor and the first recording and reproducing switch SW2-1. And a first recording and reproducing switch SW2-6.

The present invention will be described in detail based on the above-described configuration.

First, when the listener selects the turntable mode by operating the mode selector switch SW1, and then operates the turntable, the first power source that is the supply power supply through the line 1 from the contact TTP of the first mode selector switch SW1. The regenerative amplifier 20, which is supplied and operated by B +), inputs and amplifies the audio signal from the pickup of the turntable through the line 2 and outputs it to the first level adjusting means.

The first level adjusting means for inputting the output of the regenerative amplifier 20 raises the output of the regenerative amplifier 20 to a predetermined level by the first power source B + applied through the line 1, thereby increasing the output of the regenerative amplifier 20. In this case, the capacitor C1 is a blanking capacitor for blocking DC and only the AC component of the output of the regenerative amplifier 20 is output to the anode of the diode D1, and the resistor R1 is used for the bias. ) Blocks the ingress of the signal on line 3.

Then, the main amplifier 23 inputs and amplifies the audio signal on the line 3 through the capacitor C3 and the variable resistor VR1 and outputs it through the speaker SP so that a person can hear it.

At this time, when the listener presses the recording key to record the audio information to the tape, the 1-6 recording / playback switch (SW2-1-SW2-6) contacts (b1-b6) and contacts (C1-C6), respectively. ) Is turned on and the first and second leaf switches LS1 and 2 also remain on.

Then, the recording and reproducing amplifier 22, which is operated by the first power supply B + applied through the first leaf switch LS1, outputs the audio output on the line 3 to the resistor R12 and the first recording and reproducing switch. Input amplification through the two contacts b1 and c1 of (SW2-1), two contacts (b4, c4) of the fourth recording and reproducing switch (SW2-4) and two contacts of the second recording and reproducing switch (SW2-2) Output to the head 21 via (b2, c2).

The capacitor C6 connected between the second recording / reproducing switch SW2-2 and the fourth recording / reproducing switch SW2-4 acts as a blanking capacitor for DC blocking, and serves as a resistor R13 and a capacitor C7. The configured parallel circuit has a filtering function.

On the other hand, the bias circuit 24 is also operated by the first power source B + applied through the two contacts b5 and c5 of the fifth recording and reproducing switch SW2-5 to generate a sinusoidal waveform of the reference frequency to generate the third recording. It outputs to the head 21 via the two contacts b3 and c3 of the regeneration switch SW2-3.

Then, the head 21 records the voice signal input from the recording / reproducing amplifier 22 on the tape by the sinusoidal waveform applied from the bias circuit 24. At this time, the tape is driven by the motor 25 operated by the first power source B + applied through the first leaf switch LS1.

On the other hand, the AMPS 27, which receives the first power B + on the line 1 through the diode D4, outputs the output of the regenerative amplifier 20 output on the line 3 to the resistor voltage dividers R3 and R4. By inputting through) and checking whether there is a voice signal during the output of the reproducing amplifier 20, while the voice signal is output, while the voice signal in the low logic state is output to the line 4, if the voice signal is not detected, that is to be reproduced When reproducing the non-information section of the disc, the audio presence / absence detection signal in a high logic state is output to the line 4.

At this time, the magnet driving means for inputting the voice presence detection signal through the line 4 is connected to the magnet 26 through the resistor R7 by the transistor Q2 which is turned on when the voice presence detection signal in the high logic state is input. The magnet 26 is operated by grounding to form a current path of the magnet 26.

The magnet 26 then resets the external recording key when the current path is formed.

On the other hand, the motor control means for inputting the first power source B + on the line 1 through two contacts b6 and c6 of the sixth recording and reproducing switch SW2-6 detects the presence or absence of audio on the line 4. A signal is input to stop the motor 25 according to the logic state of the voice presence detection signal. While the voice presence detection signal in the low logic state is input, the motor 25 is operated and the voice presence detection signal in the high logic state is input. When is inputted, the motor 25 is stopped.

The motor control means will be described in detail as follows.

The audio presence detection signal on the line 4 is applied to the base from the line 1 through the resistor R6 via the two contacts b6 and c6 of the sixth recording and reproducing switch SW2-6. It is applied to the base of transistor Q4 via the collector of transistor Q3 turned on by (B +) and the resistor voltage dividers R9 and R10 of the emitter.

Then, the transistor Q4 is turned on when the high logic state voice presence detection signal is applied, and the first power source B + applied to the collector through the first leaf switch LS1 to the base of the transistor Q5 through the emitter. Is authorized.

At this time, the transistor Q5 is turned off by the first power source B + applied to the base and the motor 25 is stopped by shorting the motor 25 with the second power source GND.

Therefore, the tape recorder stops recording when playing the non-information section of the turntable's disc.

Also, it is forbidden to mention that the recording control process using AMPS and the voice information processing search operation are currently used in the tape recorder operation. In addition, the AMPS can adjust the time for generating and outputting the voice signal detection signal after detecting the voice signal by the AMPS control means. In the tape recorder operation mode, the resistance from the contact point (TRP) of the mode selector switch SW1 is used. The resistor R6 and the capacitor C3 are held in a conductive state between the line 6 and the connection point 7 by the turned-on transistor Q1 which inputs the first power source B + applied through the R14 to the base. Delays the output time of the audio presence detection signal of the AMPS 27 by the time constant, and the transistor Q1 is turned off in the tape recorder operation mode, so the sum of the two resistors R5 and R6 and the capacitance of the capacitor C2 are The output time of the audio presence detection signal of the AMPS 27 is delayed by the time constant by the value.

The present invention as described above can control the operation of the deck during non-information section playback or playback completion by controlling the recording of the voice information recorded on the disk during the turntable operation and can prevent the residual noise generated by the non-information section to be recorded. There is an advantage to that.

Claims (1)

A mode selection switch SW1 for selecting a turntable, radio or tape recorder mode according to the listener's selection, and a first power source B + supplied by the mode selection switch SW1 to receive a voice signal input from a pickup. A reproduction amplifier 20 for amplifying and outputting, a head 21 for recording an audio signal on or reading out the audio signal recorded on the tape, and a recording for amplifying the audio signal recorded or reproduced through the head 21. A recording amplifier 22, a main amplifier 23 for amplifying the output of the reproduction amplifier 20 or the recording reproduction amplifier 22 and outputting the same through the speaker SP, and when recording to the head 21. The output of the regenerative amplifier 20 is controlled to a predetermined level by a bias circuit 24 for generating and supplying a fixed waveform of frequency and a first power source B + applied from the mode selection switch SW1 when the turntable mode is selected. Rising to Output of the recording / reproducing amplifier 22 by the first level adjusting means for one-way transmission to the main amplifier 23 and the first power supply B + applied from the mode selection switch SW1 when the tape recorder mode is selected. Second level adjusting means for raising the signal to a predetermined level and transmitting it to the main amplifier 23 in one direction, and transmitted to an external play key and a recording key to output the first level adjusting means. The output of the recording / reproducing amplifier 22 is interlocked with the first recording / reproducing switch SW2-1 for transmitting to the input terminal of the recording / reproducing amplifier 22 and the first recording / reproducing switch SW2-1. A second recording and reproducing switch SW2-2 for transmitting to the head 21 or an audio signal generated in the head 21 to an input terminal of the recording and reproducing amplifier 22, and the first recording and reproducing switch ( The square waveform of the bias circuit 24 is linked to SW2-1 to the head 2. 1) transmits the output of the recording / reproducing amplifier 22 to the second gain adjusting means in association with the third recording / reproducing switch SW2-3 and the first recording / reproducing switch SW2-1. A first power supply (3) is connected to the bias circuit 24 in association with the fourth recording / playback switch SW2-4, which is transmitted to the second recording / playback switch SW2-2, and the first recording / playback switch SW2-1. The fifth recording and reproducing switch SW2-5 for controlling the supply of B +), the motor 25 for driving the tape, the first power supply when selecting an external play key and a recording key, a rewinding key, and a fast forward key. In an acoustic apparatus having (B +) the first reproducing switch (LS1) supplied to the recording / playing amplifier (22) and the motor (25), a fast forward key or a record key selected during a fast forward operation or a recording operation is returned. It is linked with the magnet 26 to set and an external fast forward key and a recording key, and is fast forward The second leaf switch LS2 for inputting the first power B + from the first leaf switch LS1 to the magnet 26 during recording or recording, and the mode selection for turntable operation or tape recorder operation. By detecting the presence or absence of an audio signal by inputting the output of the reproduction amplifier 20 or the recording reproduction amplifier 22 from the first or second level adjusting means by the first power supply B + applied from the switch SW1. The AMPS 27 generates an audio signal presence signal and operates the first power source B + applied from the mode selection switch SW1 when the tape recorder is operated, thereby causing the AMPS 27 to operate by the mode selection switch SW1. AMPS adjustment means for adjusting the detection time of the control unit, magnet driving means for driving the magnet 26 according to the voice presence detection signal of the AMPS 27, and voice presence detection signal of the AMPS 27 during turntable operation. According to the of the motor 25 Motor control means for controlling the movement and the first recording and reproducing switch (SW2-1) in conjunction with the first power supply (B +) from the mode selection switch (SW1) during the turntable operation to supply to the motor control means A turntable recording control circuit using an automatic music program sensor, characterized by comprising a sixth recording and reproducing switch (SW2-6).