Zero line falling electricity larceny prevention metering device based on reset prevention device
A technology of reset device and metering device, which is applied in the field of electric power and can solve problems such as reducing the system
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[0015] The present invention will be further described below in conjunction with accompanying drawing:
[0016] Simulator comparator detection circuit, the analog comparator circuit is the key to improve the electricity stealing metering system, the analog comparator CB of the chip V9911 is used here, its structure is as follows figure 1 shown. The input terminal M1 of the analog comparator CB, the reference voltage source (REF_LP) is input as the reverse signal source of the comparator. When the system is running, the switch of the analog comparator is turned on, and the input signal source of the analog comparator CB is selected, and then by reading Get the value of the ANState register to judge the output state of the analog comparator CB. figure 2 It is the schematic design of the analog comparator, where CMPBP or CMPBN represents the input terminal M1 of the analog comparator CB, and one of them can be selected through the input signal source of the analog comparator CB...
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