KR870002424Y1 - Head modulation circuit - Google Patents

Abstract

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Description

Multi-purpose sleep learning head change over circuit

1 is a state diagram showing the information contained in the stereo channel of the multi-purpose sleep learning tape of the present invention.

2 is a head switching circuit of the present invention.

* Explanation of symbols for main parts of the drawings

1: casting part 2: gate control part

3: display logic section 4: reproduction recording head section

5: erasing head portion 11: first logic portion

12: second logic unit 13: third logic unit

14: fourth logic unit

The present invention relates to a head switching circuit for multi-purpose sleep learning.

The sleep learning head is suitably composed of two channels in the case of mono, in which one channel has hypnotic information recorded, and the other channel has a system in which learning information is recorded or reproduced.

Conventionally, for this reason, a head suitable for this, and when not learning sleep, a channel containing learning information has a means for recording or erasing other contents or a switching means for recording and erasing ordinary mono music. .

However, in such a device, the electrical connection for use in stereo is complicated, and there is a problem in the use means thereof, and it has been difficult to use for stereo.

The present invention has been devised in view of the above-described inconvenience, which is intended to greatly increase the value of use of the multi-purpose sleep learning apparatus by utilizing the stereo by giving a head selection means using an electronic logic circuit.

This will be described in detail below.

A four-channel stereo switch (S ₁ ), a mono switch (S ₂ ), a normal stereo switch (S ₃ ), and a cancellation switch (S ₄ ) of four reproduction and recording head sections (4) are constituted. _One end of the stereo switch S ₁ is connected to an input terminal of one side of the NAND gates N ₁ -N ₄ of the first logic unit 11.

The mono switch S ₂ is connected to an input terminal of the NAND gates N ₅ and N ₆ of the second logic unit 11, and the stereo switch S ₃ is normally connected to the NAND gate of the third logic unit 13. N ₇ and N ₈ ) are connected to one end, and the erase switch S ₄ is connected to the inverter I ₂ of the fourth logic unit 14.

On the other hand, the flip-flop FF Q stage of the gate control unit 2 including the function switching switch S ₅ , the inverter I ₂ , and the flip-flop FF is the NAND gate N ₇ of the third logic unit 13. , N ₈ ) is connected to the other end, and the Q output is connected to the other input of the NAND gates N ₁ -N ₆ of the first and second logic units 11 and 12.

In addition, NAND gates N ₉ -N ₁₁ and transistors T ₁ -T ₃ having _one end of each of the input switch lines S ₁ -S ₂ and the Q and Q outputs of the gate controller 2 as two inputs. And a display logic section 3 as an LED (LED ₁ -LED ₃ ), each output line of the first, second, third, logic sections 11-13 and the erasing logic section 14 being countercurrent resistant. _One coil of each head (PH ₁ : hypnotic music, PH ₂ : hypnotic music, ST ₁ : learning information, ST ₂ : learning information, ER ₁ : first erasing bias, ER ₂ : second erasing bias) The other end thereof is connected to the recording device and the reproducing device, and connected to the gyrometer or the eliminating system (EP ₁ , EP ₂ ), respectively.

Unexplained sign B ⁺ is the power supply.

In the present invention of the above configuration, when the sleep learning is performed in stereo, when the switch S ₁ is pressed, the input logic 1 is applied to one end of the NAND gates N ₁ -N ₄ of the first logic unit 11, and in this case, the power supply B ⁺ The logic 1 is applied to the reset R end of the flip-flop FF of the gate control unit 2 so that the output logic of Q becomes 1, so that the output of the first logic unit 11 becomes 0 to reproduce and All four heads of the recorder (PH ₁ , PH ₂ , ST ₁ , ST ₂ ) are selected at the same time. In this case, the PH ₁ , PH ₂ is for the hypnotic music information channel, and the ST ₁ , ST ₂ is for the learning information channel. Stereo recording and playback on 4-channel tape is possible.

At this time, the direct current or alternating current bias of the reproduction and recorder should be designed with sufficient consideration for the NAND gates N ₁ -N ₈ and the output of the inverter I ₂ .

Meanwhile, when the stereo switch S ₁ of the sleep learning is selected, the two input logics of the NAND gate N ₉ of the display unit 3 become 1, respectively, and the transistor T ₁ is turned off to turn on the LED (LED ₁ ). It will be turned on.

Similarly, when the stereo switch S ₁ is turned off and the mono switch S ₂ for sleep learning is pressed, the output of the second logic unit 12 becomes 0, and the two heads PH ₂ and ST _{1 are turned off.} In the same way, the two input logics of the NAND gate N ₁₀ of the display unit 3 become 1 and the 2 outputs become 0, thereby turning on the LED (LED ₂ ).

On the other hand, when the function selection switch S ₅ of the gate control unit 2 is pressed, the Q output of the flip-flop FF is inverted to 1, and q becomes 0, so the general switch is turned off after the mono switch S ² is turned off. When S ₃ is unlocked, only the learning information heads ST _{1 and} ST ₂ are selected because the output of the third logic unit 13 becomes zero.

In addition, two inputs of the NAND gate N ₁₁ of the display unit 3 become 1 to turn on the LED (LED ₃ ).

In addition, when the stereo switch S ₃ is turned off and the erase switch S ₄ is pressed, the output of the fourth logic unit 14 is zero, and the first and second erase heads ER ₁ and ER ₂ are selected. .

In this case, since the display unit 3 is not utilized, the erasing operation can be confirmed.

The present invention is a device that utilizes the channel for sleep learning, the stereoscopic and mono can be selectively selected for sleep learning, two channels of learning information can be used to record the ordinary sound information, by providing a means that can be erased There is a beneficial feature that significantly increases the utility of such devices.

Claims (1)

Four heads (PH ₁ , PH ₂ , ST ₁ , SN ₂ ) and two erasing heads (ER ₁ , ER ₂ ) having stereo playback and recording heads for sleep information and learning information, respectively, are provided. The first logic unit 11 for simultaneously selecting all the four heads of the sleep learning stereos PH ₁ , PH ₂ , ST ₁ , and ST ₂ , and the heads of the two sleep learning monos PH ₂ , ST ₁ A second logic section 12 for selecting only the third, a third logic section 13 for selecting only the heads ST ₁ and ST ₂ for two normal stereos and a learning information erasing head ER ₁ , ER ₂ ) a fourth logic unit 14 for selecting keys is provided, and the casting unit 1 and the function selection switch S ₅ , the inverter I ₂ , and the flip are made by four switches S ₁ and S ₄ . The gate controller 2 of the flop FF is connected to the gate control unit 2 and the casting operation unit 1 to connect the gate controller 2 and the casting logic unit 1 to the display logic unit 3 to display the selected contents upon selection. city Learning-purpose water head switching circuit, characterized in that the configuration.