KR0157543B1 - Mode control method of magnetic recording / playback device - Google Patents

Abstract

A mode control method of a magnetic recording / reproducing apparatus of the present invention, and more particularly, a mode control method of a magnetic recording / reproducing apparatus of a patent application No. 93-5016 by the same applicant (March 29, 1993). Will be improved. In the mode control method of the magnetic recording / reproducing apparatus according to the present invention, the reproduction mode and the recording performance of the magnetic recording / reproducing apparatus can be improved by setting the reproduction mode to the reference mode and controlling other modes based on the reproduction mode. .

Description

Mode control method of magnetic recording / playback device

1 is a block diagram showing a mode control circuit of a magnetic recording / reproducing apparatus.

2 is a flowchart illustrating a conventional mode control process.

3 is a flowchart illustrating a mode control method of the magnetic recording / reproducing apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

10: key input unit 20: micom

21: Mode discrimination unit 22: Reference signal generator

23: FG output section 24: comparison section

30: main servo IC 40: capstan motor control unit

50: FG signal detection unit 60: amplification unit

70: converter

A mode control method of a magnetic recording / reproducing apparatus of the present invention, in particular, mode control associated with a magnetic recording / reproducing apparatus of Patent Application No. 93-5016 (March 29, 1993, hereinafter referred to as an earlier application) by the same applicant. It is about a method.

In the previous application, the stop mode among the eject mode, the unloading stop mode (hereinafter also referred to as ULS), the stop mode, and the play back mode (hereinafter also referred to as PB) is set to a lip switch ( The mode switch method was used as the basis of other modes by detecting with leaf switch. Here, a little unfamiliar to the unloading stop mode, the sensor detects whether the cassette tape is seated after the eject mode is executed, and the motor operates to prepare a new cassette tape to be inserted. This is called loading stop mode. FIG. 1 shows a block diagram of the mode control circuit of the magnetic recording / reproducing apparatus of the prior application which implements such a mode conversion method.

As shown in FIG. 1, the microcomputer 20 is connected to the key input unit 10 for selecting a mode. The main servo IC 30 for driving the capstan motor clockwise or counterclockwise is connected to the output terminal of the microcomputer 20 according to the start control signal Start ctl output from the microcomputer 20. A frequency generator (Frequency generator, hereinafter referred to as FG) signal generated by the capstan motor controller 40 for driving or stopping the capstan motor clockwise or counterclockwise according to the output of the main servo IC 30. The FG signal detection unit 50 for detecting the signal is connected, and the amplification unit 60 for amplifying the output of the FG signal detection unit 50 to an appropriate level is connected to the output terminal of the FG signal detection unit 50. A conversion section 70 for converting an analog type FG signal amplified by the output section of the amplifying section 60 into a digital type FG signal is connected to an output terminal of the amplifying section 60. The output terminal is connected to the microcomputer 20. The microcomputer 20 is connected to an output terminal of the key input unit 10 and determines the input mode corresponding to the signal output from the key input unit 10 and compares the current mode with the mode discriminating unit 21 and outputs a control signal. The FG signal generated according to the driving degree of the capstan motor and the reference signal generator 22 for controlling the driving of the capstan motor in accordance with the determined input mode and the current mode connected to the output terminal of the mode discriminating unit 21. Comparing the signal output from the FG signal output unit 23 and the FG signal output unit 23 and the signal output from the reference signal generator 22 to output a stop control signal (Stop ctl) when a predetermined condition is satisfied. The comparison part 24 is provided. The output terminal of the comparator 24 is connected to the main servo IC 30 to stop the driving of the capstan motor. The reference signal generator 22 outputs a high or low signal in the stop sensor S1 that outputs a high signal only in the stop mode, a high or low signal in the unloading stop mode, and outputs a high signal in the stop mode or the regeneration mode. And a cassette-in sensor S2 for outputting a low signal.

In the mode control circuit having such a configuration, the driving mode of the motor providing the mode conversion power is conventionally adjusted by countering the FG (Frequency generator) signal based on the stop mode so that the conversion mode of the magnetic recording / reproducing apparatus can be recognized. A mode conversion method is used, which is shown in FIG.

The mode control method of the magnetic recording / reproducing apparatus according to FIG. 2 is described in detail in the prior application, which will be briefly described here.

When the mode key or the cassette in signal is input through the key input unit (101), the input mode is determined (102), and the determined input mode is compared with the current mode (103). It outputs to the main servo IC (104) to drive the capstan motor (105) and outputs the FG signal (106).

On the other hand, if the current mode is the unloading stop mode and the input mode is determined to be satisfied (107) when the output of the stop sensor (S1) is triggered from low to high (108) stop control The signal is outputted to the main servo IC (109) to stop driving the capstan motor (110).

When the current mode is the stop mode and the input mode is the regeneration mode (111), when the output of the stop sensor S1 is triggered from high to low (112), the number of FG signals is counted (113). When the number of FG signals becomes equal (114), the stop control signal is output to the main servo IC (109) to stop the driving of the capstan motor (110).

If the current mode is the playback mode and the input mode is the stop mode (115) when the output of the stop sensor (S1) is triggered from low to high (116) it outputs a stop control signal to the main servo IC (109) The drive stops (110).

When the current mode is the stop mode and the input mode is the eject mode (117), when the output of the cassette-in sensor S2 is triggered from high to low (118), the number of FG signals is counted (119) in the unloading stop mode. When the number of reference FG signals is equal to the number of counter FG signals (120), the stop control signal is output to the main servo IC (109) to stop driving the capstan motor (110).

If the current mode is the playback mode and the input mode is the eject mode (121), the number of FG signals is also counted (119) from the time when the output of the cassette in sensor S2 is triggered from high to low (119). When the number of reference FG signals is equal to the number of FG signals (120), the stop control signal is output to the main servo IC (109) to stop the driving of the capstan motor (110).

The mode control method as briefly described with reference to FIG. 2 has a disadvantage in that the stop mode is a reference, and thus a mechanical error occurs when switching to the playback mode, thereby reducing the playback performance or the recording performance of the magnetic recording / reproducing apparatus. .

It is an object of the present invention to provide a mode control method for improving recording / playback performance of a magnetic recording / playback apparatus.

The object of the present invention is to provide a motor shaft which determines the mode of the magnetic recording / reproducing apparatus according to the rotation direction and the rotation angle, and provides a motor for providing the mode conversion power, and generates a predetermined number of signals according to the rotation angle of the motor shaft. A mode control method of a magnetic recording / playback apparatus comprising a signal generator and mode selection means for selecting a mode, the first reference position of the motor shaft and the magnetic recording / A reference signal for setting a second reference position of the motor shaft in an eject mode of a playback device and for setting the number of signals generated for each conversion mode in the signal generator when converting from the first reference position and the second reference position to other modes; In the setting step, when a mode selection signal or a cassette-in signal is input through the mode selection means, a corresponding input mode is determined and the current A mode comparison step for comparing with the control mode, if the input mode and the current mode are different from each other, driving the motor according to the type of the input mode and the current mode to rotate the motor shaft in a required direction, and generating a signal; and When the rotating motor shaft reaches the first reference position or the second reference position, the set reference signal number is generated according to the type of the input mode and the current mode based on the reached first reference position or the second reference position. And a mode conversion step of terminating the driving of the motor after the motor shaft is rotated in the required direction by the required angle.

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

First, the circuit configuration for realizing the mode control method of the present invention is almost the same as in FIG. 1, and it is clear that the reference mode that can be detected by the mode detection sensor and the operation reference value of the motor are changed accordingly. That is, the first switch S1 capable of detecting the playback mode of the magnetic recording / playback apparatus and the second switch S2 for checking the presence or absence of the cassette tape are provided, and the number of FG signals generated between the stop modes in the playback mode. Measure and set the number of FG signals generated between and eject mode and unloading stop mode in advance.

3 is a flowchart illustrating a mode control method of the magnetic recording / reproducing apparatus according to the present invention, and shows a mode control process in the microcomputer according to the output of the key input unit.

That is, when a predetermined signal is input through the mode key or the cassette in switch (201), an input mode corresponding to the signal is determined (202). If the two input modes are different from each other by comparing the determined input mode with the current mode (203), it is determined whether the determined input mode is the stop mode and the current mode is the reproduction mode (204). If this is satisfied, the motor drive control signal in the first direction is output to the main servo IC (205) to drive the motor in the first direction and output the FG signal (206).

If the determined input mode is the stop mode and the current mode does not satisfy the condition of the regeneration mode, it is determined whether the determined input mode is the eject mode and the current mode is the regeneration mode or the stop mode (207). The drive control signal is output to the main servo IC (205) to drive the motor in the first direction and output the FG signal (206).

If the determined input mode is the eject mode and the current mode does not satisfy the condition of the play mode or the stop mode, it is determined whether the determined input mode signal is the cassette in signal and the current mode is the unloading stop mode (208). The motor drive control signal in the second direction is output to the main servo IC (209) to drive the motor in the second direction and output the FG signal (206).

If the determined input mode is a cassette-in signal and the current mode does not satisfy the condition of the unloading stop mode, it is determined whether the determined input mode is the play mode and the current mode is the stop mode (210). The drive control signal is output to the main servo IC (209) to drive the motor in the second direction and output the FG signal (206).

Meanwhile, when the determined input mode is the stop mode and the current mode is the regeneration mode (204a), the moment when the first switch S1 detecting whether the regeneration mode is triggered from high to low by a motor driven in the first direction (211) The FG signal generated according to the rotational degree of the motor shaft of the motor driven in the first direction (212) and the same as the first reference signal number between the preset stop mode and the regeneration mode (213). The signal is output to the main servo IC (214) and the driving of the motor is terminated (215). In this case, the magnetic recording / reproducing apparatus is in the stop mode.

If the determined input mode signal is the cassette-in signal and the current mode is the unloading stop mode (208a), the first switch S1 is triggered from low to high by the motor driven in the second direction (216). Outputs the one-way drive control signal to the main servo IC (217) to generate the FG signal while rotating the motor in reverse (218), and is driven in the first direction from the moment (211) when the first switch is triggered from high to low When the FG signal generated according to the rotational degree of the motor shaft of the motor is countered (212) and the number of reference signals between the preset play mode and the stop mode is the same (213), the stop control signal of the motor is output to the main servo IC (214). The driving of the motor is terminated (215).

In this case, too, the cassette tape is inserted into the magnetic recording / reproducing apparatus and is in a ready state in which the reproducing function can be performed, that is, in the stop mode of the magnetic recording / reproducing apparatus.

If the determined input mode is the regeneration mode and the current mode is the stop mode (210a), when the first switch S1 is triggered from low to high by the motor driven in the second direction (219), the stop control signal of the motor is generated. The servo IC is output (214) and the driving of the motor is terminated (215). In this case, it is in the mode control state of the magnetic recording / reproducing apparatus.

If the determined input mode is the eject mode and the current mode is the play mode or the stop mode (207a), the moment when the second switch S2 for detecting whether the cassette tape is seated by the motor driven in the first direction is triggered from high to low From 220, the second direction drive control signal of the motor is output to the main servo IC (221). The motor is rotated in reverse to generate an FG signal, and the FG signal is countered (222). When the number of FG signals to be countered is equal to the second reference signal between the preset eject mode and the unloading stop mode (223), the stop control signal of the motor is output to the main servo IC (214) and the driving of the motor is terminated (215). ). Here, the moment 220 when the second switch S2 is triggered from high to low is the eject mode state, and the final state of the magnetic recording / reproducing apparatus is the unloading stop mode state. That is, it is in the ready state to insert the next cassette tape.

The mode control method of the magnetic recording / reproducing apparatus according to the present invention as described above with reference to FIG. It can be effective.

Claims (4)

Selecting a motor having a motor shaft in which the mode of the magnetic recording / reproducing apparatus is determined in the rotation direction and the rotation angle, the motor providing the mode conversion power, the signal generator generating the predetermined number of signals according to the rotation angle of the motor shaft, and the mode. A mode control method of a magnetic recording / reproducing apparatus having a mode selection means, comprising: a first reference position of the motor shaft at the start of a reproducing mode of the magnetic recording / reproducing apparatus and an eject mode of the magnetic recording / reproducing apparatus; A reference signal number setting step of setting a second reference position of the motor shaft and setting the number of signals generated for each conversion mode in the signal generator when converting from the first reference position and the second reference position to other modes; A mode comparison step of determining a corresponding input mode and comparing the current mode with a mode selection signal or a cassette-in signal through the mode selection means; A motor driving step of driving the motor to rotate the motor shaft in a required direction and generating a signal when the input mode and the current mode are different from each other; And the reference signal number set according to the type of the input mode and the current mode based on the reached first reference position or second reference position when the rotating motor shaft reaches the first reference position or the second reference position. And a mode conversion step of terminating the driving of the motor after the motor shaft is rotated in the required direction by the generated angle to the input mode or the required mode. The method of claim 1, wherein the reference signal number setting step includes the first reference signal number generated by the signal generator and the unloading stop mode at the second reference position according to the rotation angle of the motor shaft when the first reference position is converted to the stop mode. And setting the second reference signal number generated by the signal generator according to the rotation angle of the motor shaft during conversion to. The method of claim 2, wherein the motor driving step includes driving the motor to rotate the motor shaft in a first direction when the determined input mode is a stop mode and the current mode is a regeneration mode, and the determined input mode is an eject mode. Drive the motor to rotate the motor shaft in the first direction when the current mode is the regeneration mode or the stop mode, and drive the motor when the determined input mode is the cassette-in signal and the current mode is the unloading stop mode. And rotating the motor shaft in a second direction and rotating the motor shaft in a second direction when the determined input mode is a regeneration mode and the current mode is a stop mode. The signal generator of claim 3, wherein the mode conversion step comprises: the signal generator starting from the moment when the motor shaft rotated in the first direction reaches the first reference position when the determined input mode is the stop mode and the current mode is the regeneration mode. The motor shaft is rotated in the second direction when the number of signals generated by the counter is the first reference signal, and the driving of the motor is terminated. When the determined input mode is a cassette-in signal and the current mode is an unloading stop mode. When the first reference position is reached, the motor is rotated in the first direction and the number of signals generated by the signal generator is counted from the first reference position. When the first reference signal is reached, the driving of the motor is terminated. When the determined input mode is the regeneration mode and the current mode is the stop mode, the driving of the motor is terminated at the first reference position, and the plate When the separate input mode is the eject mode and the current mode is the play mode or the stop mode, when the motor shaft rotated in the first direction reaches the second reference position and the cassette out signal is input, the motor shaft is rotated in the second direction. And counting the number of signals generated by the signal generator and ending the driving of the motor when the number of the second reference signals is reached.