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Two-dimensional matrix keyboard circuit

A keyboard circuit and two-dimensional matrix technology, applied in the field of two-dimensional matrix keyboard circuits, can solve problems such as long delay, and achieve the effects of short delay, simple understanding, and small execution resources.

Inactive Publication Date: 2017-07-04
天津小马快跑科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a two-dimensional matrix keyboard circuit to solve the problem of long time delay in the traditional keyboard circuit in the above-mentioned background technology

Method used

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  • Two-dimensional matrix keyboard circuit

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Experimental program
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Effect test

Embodiment

[0016] This embodiment includes: keyboard circuit, amplifier circuit, such as figure 1 shown.

[0017] The keyboard circuit includes button S1, button S2, button S3, button S4, button S5, button S6, button S7, button S8, button S9, chip U1, transistor Q1, resistor R9, resistor R1, capacitor C4, capacitor C5, inductor L1 , Resistor R1, pin 1 of chip U1 is connected to one end of button S1, its pin 2 is connected to one end of button S, its pin 3 is connected to one end of button S3, its pin 4 is connected to one end of button S4, and its pin 5 is connected to one end of button S4 Connect one end of button S5, its pin 6 connects one end of button S6, its pin 7 connects one end of button S7, its pin 8 connects one end of button S8, its pin 9 connects one end of button S9, its pin 17 Connect the base of the transistor Q1, its pin 18 is connected to the collector of the transistor Q1, its pin 23 is connected to one end of the resistor R9, its pin 24 is connected to one end of the ...

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Abstract

The invention belongs to the technical field of keyboards, and in particular relates to a two-dimensional matrix keyboard circuit comprising a keyboard circuit and an amplifier circuit, wherein the keyboard circuit comprises a button S1, a button S2, a button S3, a button S4, a button S5, a button S6, a button S7, a button S8, a button S9, a chip U1, a triode Q1, a resistor R9, a resistor R1, a capacitor C4, a capacitor C5, an inductor L1 and a resistor R1, wherein a pin 1 of the chip U1 is connected with one end of the button S1, the amplifier circuit comprises an amplifier U2 and a capacitor C6, a pin 1 of the amplifier U2 is connected with a pin2 of the chip U1 and one end of the capacitor C6, a pin 3 of the chip U1 is earthed, and the other end of the capacitor C6 is connected with a pin 40 of the chip U1.

Description

technical field [0001] The invention belongs to the technical field of keyboards, in particular to a two-dimensional matrix keyboard circuit. Background technique [0002] Keyboards are widely used in various electronic devices as peripheral devices for controlling commands or data input of the electronic devices. Therefore, the quality of the keyboard and whether its functions can be operated normally will directly affect the operational stability of the electronic device. [0003] Matrix keyboard, as a kind of control button, has been widely used in teaching and production. Matrix keyboard, as a kind of control button, has been widely used in teaching and production. The matrix keyboards in the prior art all have independent keys, and the key values ​​are output by scanning. Its shortcomings mainly lie in: the program is complex, difficult to understand, the execution takes up system resources, and there is a relatively certain delay, which increases the complexity of l...

Claims

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Application Information

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IPC IPC(8): H03M11/02H03M11/20
CPCH03M11/02H03M11/20
Inventor 王新华
Owner 天津小马快跑科技发展有限公司
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