Capacitive touch screen signal receiving circuit

A capacitive touch screen and signal receiving technology, applied in electrical components, electrical digital data processing, instruments, etc., can solve problems such as low efficiency, waste of resources, and high power consumption

Pending Publication Date: 2020-10-20
中航华东光电有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For a capacitive touch screen with a large size and a large number of receiving channels, for a circuit in which all channels receive signals in sequence, although the number of components is small and the circuit board area is small, it takes too long and the efficiency is very low; for al

Method used

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  • Capacitive touch screen signal receiving circuit

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[0015] The specific embodiments of the present invention will be described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and not to limit the present invention.

[0016] In the present invention, if there is no explanation to the contrary, the positional words contained in the term only represent the position of the term in the normal use state, or are common names understood by those skilled in the art, and should not be regarded as Term limitation.

[0017] See figure 1 , The present invention provides a capacitive touch screen signal receiving circuit, including N eight-to-one multiplexers, N operational amplifiers, and N ten-bit AD converters, where one eight-to-one multiplexer and one operational amplifier And a ten-bit AD converter form a basic unit for signal reception;

[0018] The eight-to-one multiplexer is controlled by the enable contro...

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Abstract

The invention discloses a capacitive touch screen signal receiving circuit. The circuit comprises N one-out-of-eight multiplexers, N operational amplifiers and N ten-bit AD converters, wherein one oneone-out-of-eight multiplexer, one operational amplifier and one ten-bit AD converter form a basic unit for receiving one path of signal; the one-out-of-eight multiplexers are enabled to be controlledto input signals for the operational amplifiesr; and a charge transfer method is used for detecting an induction capacitor, the operational amplifiers output following analog signals, the analog signals are converted into binary numbers with the bit width of ten bits through the ten-bit AD converters, and the binary numbers are transmitted to subsequent operation, so that multichannel analog signals are quickly and efficiently received and converted into digital signals in parallel. The capacitive touch screen signal receiving circuit is simple in basic unit structure, simple in repeated structure, high in reliability and high in transmission speed, and sufficient time is reserved for subsequent operation of the whole system.

Description

technical field [0001] The present invention relates to the technical field of capacitive touch screens, in particular to a signal receiving circuit of a capacitive touch screen. Background technique [0002] In the field of large-size capacitive touch screens, in order to ensure that the screen is larger and the resolution is still high, more receiving channels for sensor sensing signals are required, so there are more receiving signals, so quickly receive analog signals and convert them into digital signals. It is very necessary and important to reserve sufficient time for subsequent complex calculation operations, etc., to minimize the touch sensing time and improve the working speed of the device. [0003] For a capacitive touch screen with a large size and a large number of receiving channels, for a circuit in which all channels receive signals in sequence, although the number of components is small and the circuit board area is small, it takes too long and the efficien...

Claims

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Application Information

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IPC IPC(8): G06F3/044H04B1/16
CPCG06F3/044H04B1/16H04B1/1638
Inventor 王飒戴超君陈文明吴豪杰陈召全章小兵
Owner 中航华东光电有限公司
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