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Muti-channel integrator

An integrator and multi-channel technology, applied in the field of integrators, can solve problems such as increasing the area

Inactive Publication Date: 2013-03-20
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to prevent the output of the integrator 120 from reaching saturation, the feedback capacitor Cfb of the integrator 120 must also increase its capacitance accordingly (that is, increase its area).

Method used

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  • Muti-channel integrator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] The following embodiments will take a capacitor type touch panel as an example to illustrate the application of the multi-channel integrator of the present invention. However, the scope of application of the present invention should not be limited thereto. Any charge-type touch panel, even any circuit or electronic product that needs a multi-channel integrator, can be applied according to the teaching of this manual.

[0031] figure 2 It is a schematic circuit diagram illustrating a multi-channel integrator according to an embodiment of the present invention. The multi-channel integrator 200 has n channels, and each channel is configured with an integration unit. Only the integration unit 210 - 1 of the first channel and the integration unit 210 - n of the nth channel are shown in the figure, and other channels can be analogized with reference to the following description. Besides, the multi-channel integrator 200 also has a first switch SW1 and a second switch SW2....

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Abstract

The invention discloses a multi-channel integrator, comprising a first switch, a second switch and multiple integral units, wherein the first terminals of the first switch and the second switch are used for receiving reference voltages; each integral unit comprises an operational amplifier, a feedback switch, a third switch, a fourth switch and a feedback capacitor; the second terminal of the operational amplifier is used for receiving a second reference voltage; the first terminal and the second terminal of the feedback switch are respectively coupled with the first input terminal and the first output terminal of the operational amplifier; the first terminal of the third switch is coupled with the first input terminal of the operational amplifier; the first terminal of the forth switch is coupled with the output terminal of the operational amplifier; the first terminal of the feedback capacitor is coupled with the second terminal of the first switch and the second terminal of the third switch; and the second terminal of the feedback capacitor is coupled with the second terminal of the second switch and the second terminal of the fourth switch.

Description

technical field [0001] The present invention relates to an integrator, and in particular to a multi-channel integrator. Background technique [0002] With the vigorous development of electronic technology and the popularization of wireless communication and network, various electronic devices have gradually become an indispensable tool in life. However, common input and output (I / O) interfaces, such as a keyboard or a mouse, are quite difficult to operate. In contrast, the touch panel is an intuitive and simple input and output interface. Therefore, the touch panel is often used as a human-machine interface between a human and an electronic device to perform control. [0003] In general, touch panels can be classified into resistive touch panels, optical touch panels, capacitive touch panels, and the like. According to the readout method, it can be divided into current type touch panel and charge type touch panel. figure 1 A schematic diagram illustrating a capacitor typ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/02H03K17/955G06F3/041
Inventor 庄凯岚李国铭陈英烈
Owner HIMAX TECH LTD