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Modulus switching circuit

An analog-to-digital conversion circuit and resistor technology, applied in the direction of analog/digital conversion, code conversion, electrical components, etc., can solve the problems of high production cost, poor conversion effect, complex structure, etc., and achieve small chip area occupation and cost reduction , the effect of strong anti-interference ability

Active Publication Date: 2013-03-06
BYD SEMICON CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the technical problems of the existing analog-to-digital converter circuit structure, high production cost, and poor conversion effect when detecting targets with strong interference, the present invention provides an analog-to-digital converter with low production cost and strong anti-interference ability circuit

Method used

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Embodiment Construction

[0027] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] Such as figure 1 As shown, it is a schematic diagram of the analog-to-digital conversion circuit module provided by Embodiment 1 of the present invention. It includes: a charge storage 16 , a current source module 15 , an input resistor 11 , a comparator 12 , a flip-flop 13 , a counter 14 , a discharge module 17 , and a clock generation module 18 .

[0029] The analog voltage signal to be converted is connected to the first input terminal of the comparator 12 through the input resistor 11, and the second input terminal of the comparator 12 is connected to a refer...

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Abstract

The invention provides a modulus switching circuit and belongs to the field of integrated circuits. The modulus switching circuit comprises a charge storage, a current source module, an input resistor, a comparator, a trigger, a counter and a discharging module. Simulation voltage signals to be switched is connected with a first input end of the comparator through the input resistor, a second input end of the comparator is connected with a reference voltage, an input end of the trigger is connected with an output end of the comparator, an output end of the trigger is connected with an input end of the counter and the discharging module, and the charge storage is connected between the first input end of the comparator and a first fixed level. The current source module is connected with the first input end of the comparator, and the discharging module is connected between the first input end of the comparator and a second fixed level. The modulus switching circuit is high in interference resistance, adjustable in switching accuracy and low in manufacturing cost.

Description

technical field [0001] The invention belongs to the field of integrated circuits, in particular to an analog-to-digital conversion circuit. Background technique [0002] The existing commonly used analog-to-digital converters include the following types: integral type, successive comparison type, parallel comparison type / serial comparison type, pipeline type, Sigma-delta modulation type, voltage-frequency conversion type, etc. [0003] The integral type analog-to-digital converter has high resolution, up to 22 bits, low power consumption, low cost, strong anti-interference ability, but low conversion speed. [0004] The successive comparison analog-to-digital converter has high speed and the sampling rate can reach 1MSPS. Compared with other analog-to-digital converters, the power consumption is quite low. When the resolution is lower than 12 bits, the price is lower; but when the resolution is higher than 14 bits In the case of a higher rate, the price is higher, and the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/34
Inventor 李振刚黄臣杨云
Owner BYD SEMICON CO LTD
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