Voltage monitoring circuit and voltage monitoring method
A voltage monitoring and circuit technology, applied in hardware monitoring, current indication direction, voltage polarity indication, etc., can solve the problems of reduced accuracy, nonlinear characteristic error, high cost, etc., and achieve the effect of achieving stability and reducing resources
Active Publication Date: 2017-11-07
INVENTEC PUDONG TECH CORPOARTION +1
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Problems solved by technology
[0003] However, if an I2C type ADC chip is used, the required cost is relatively high, and if a CPLD differential port is used, the conversion circuit designed based on the principle of the integral comparator of the ADC will be limited by the nonlinear characteristics of the RC circuit and the CPLD The error of the port potential comparator causes the practical accuracy to be greatly reduced
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[0044] The detailed features and advantages of the present invention are described in detail below in the embodiments, the content of which is sufficient to enable any person of ordinary skill in the art to understand the technical content of the present invention and implement it accordingly, and according to the disclosed content, claims and drawings of this specification , any person of ordinary skill in the art can easily understand the related objects and advantages of the present invention. The following examples further illustrate the concept of the present invention in detail, but do not limit the scope of the present invention in any way.
[0045] Please refer to figure 1 , figure 1 It is a circuit structure diagram of a voltage monitoring circuit according to an embodiment of the present invention. Such as figure 1 As shown, the voltage monitoring circuit 1 includes a first multiplexer 10 , a controller 12 , a resistor network circuit 14 and a first comparison cir...
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The invention discloses a voltage monitoring circuit which comprises a first multiplexer, a controller, a resistor network circuit and a first comparison circuit. The first multiplexer receives multiple tested voltages. The controller controls the first multiplexer to output one of the multiple tested voltages and produce a detection signal. The detection signal includes multiple levels, and the controller is used for outputting the levels switched according to switching instructions. The resistor network circuit comprises multiple first resistors respectively corresponding to the levels. The resistor network circuit utilizes the switching of the levels to sequentially produce multiple first reference voltages. The first comparison circuit is used for sequentially comparing the first reference voltages with the output tested voltages and sequentially and correspondingly producing and transmitting multiple first comparison results to the controller so as to judge voltage values of first tested voltages. The invention also discloses a voltage monitoring method.
Description
technical field [0001] The invention relates to a voltage monitoring circuit and a voltage monitoring method, in particular to a voltage monitoring circuit and a voltage monitoring method using a resistor network. Background technique [0002] An analog-to-digital converter (Analog Digital Converter, ADC) is a commonly used circuit, which is mainly used to convert an analog signal into a digital signal. When designing a server, the ADC circuit is often used to monitor the voltage of each channel in the server, or to identify the ID voltage of different boards. For the existing ADC circuit, an integrated circuit bus (I2C) type ADC chip is usually used, and a differential port of a CPLD can also be used to design a conversion circuit with ADC function by using the RC integration principle. [0003] However, if an I2C type ADC chip is used, the required cost is relatively high, and if a CPLD differential port is used, the conversion circuit designed based on the principle of t...
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IPC IPC(8): G06F11/30G01R19/165
CPCG01R19/16576G06F11/3058G01R17/02H04Q2213/13292H04Q3/42G01R19/165H04M3/26G01R19/14H04M19/005
Inventor 梁磊邹小兵
Owner INVENTEC PUDONG TECH CORPOARTION