Singlechip signal sampling apparatus without module converter and sampling method thereof

An analog-to-digital converter and signal sampling technology, which is applied to measurement devices, instruments, and measurement using digital measurement technology, can solve the problems of not eliminating the analog-to-digital converter, the high price of the analog-to-digital converter, etc., and achieve low cost. Effect

CN101063693BInactive Publication Date: 2012-05-30无锡联源新能源技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2012-05-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention discloses one single machine signal sample device and its method without A / D converter, which comprises single machine, one comparer and one switch tube and one RC expansive circuit, wherein the comparer front input end is connected to test voltage and its negative input end is connected to the output end of RC charge circuit; the output end of comparer is connected to the capture function end of signal machine; the said switch tube collection electrode is connected to the negative input end of comparer and its emission electrode is connected to the earth connection end of RC charge circuit; the switch tube base electrode is connected to the single machine output end.
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Description

technical field

[0001] The invention belongs to the field of signal sampling, in particular to a single-chip signal sampling device without an analog-to-digital converter and a sampling method thereof. Background technique

[0002] At present, when collecting analog signals with a single-chip microcomputer, an analog-to-digital converter must be added between the analog signal and the single-chip microcomputer to convert the analog signal into a digital signal. Because the microcontroller can only process digital signals. Although some single-chip microcomputers integrate the analog-to-digital converter into the chip, in fact, the analog-to-digital converter is not eliminated. Analog-to-digital converters are relatively expensive, especially for analog-to-digital converters with relatively high precision, sometimes even greater than the price of the microcontroller itself. Contents of the invention

[0003] The present invention provides a single-chip signal sampling dev...

Examples

Embodiment Construction

[0024] see figure 1 . The signal sampling device of a single-chip microcomputer without an analog-to-digital converter of the present invention includes a single-chip microcomputer 1 , a comparator 2 , a switch circuit 3 and an RC charge-discharge circuit 4 . The output terminals of the switch circuit are respectively connected with the input terminals of the RC charging and discharging circuit and the single-chip microcomputer; one input terminal of the comparator is connected with the voltage to be measured 100, and the other input terminal of the comparator is connected with the output terminal of the RC charging and discharging circuit. The output terminal of the comparator is connected with the other input terminal of the microcontroller.

[0025] see figure 2 , which is a circuit block diagram of the single-chip signal sampling device single-chip microcomputer without an analog-to-digital converter in the present invention. The single-chip microcomputer 1 is a single...