A Cascaded Trigger Current Comparator Circuit for Reducing Power Consumption
A current comparison and triggering technology, applied in the measurement of current/voltage, measurement of electrical variables, instruments, etc., can solve the problems of influence, high power consumption of high-precision comparators, and disadvantageous realization of low-power consumption of precision current comparison circuits. Reduce power consumption and ensure high precision
Active Publication Date: 2020-01-17
SG MICRO
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Problems solved by technology
The inventors found that the power consumption of the high-precision comparator is relatively high, which affects or is not conducive to the realization of low power consumption of the precision current comparator circuit
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[0015] Below with the accompanying drawings ( figure 1 ) to illustrate the present invention.
[0016] figure 1 It is a schematic diagram of the structure and principle of a cascaded trigger current comparison circuit for reducing power consumption in the present invention. Such as figure 1 As shown, a cascaded trigger current comparison circuit that reduces power consumption includes a front-stage comparator COMP2 and a rear-stage comparator COMP1 connected through a control logic circuit 6, and the latter stage comparator COMP1 has an enabling terminal en, The enabling terminal en is connected to the enabling signal output port 5 of the control logic circuit 6, and the preceding stage comparison result output port out2 of the preceding stage comparator COMP2 is connected to the preceding stage comparison result input port of the control logic circuit 6 4. The positive input terminals (+) of the front-stage comparator COMP2 and the rear-stage comparator COMP1 are connected...
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The invention relates to a cascading triggering type current comparison circuit achieving power consumption reduction. The cascading triggering refers to the fact that a preceding comparer detects that a to-be-detected signal exceeds preceding threshold value voltage, then triggers a backward comparer to detect the to-be-detected signal through a control logic circuit, and outputs a current comparison result based on whether the to-be-measured signal exceeds the backward threshold value voltage, wherein the detection precision to the to-be-detected signal of the backward comparer is higher than that of the preceding comparer. Power consumption reduction refers to the fact that the backward comparer is in the dormancy state before triggering and the preceding comparer with quite low power consumption replaces the backward comparer with quit high power consumption to perform the detection on the to-be-detected signal under the dormancy state. Thus, detection precision is ensured, power consumption is reduced and achieving of low power consumption of a precise current comparison circuit is facilitated.
Description
technical field [0001] The present invention relates to a current comparison circuit, in particular to a cascade trigger type current comparison circuit with reduced power consumption. The cascade trigger means that the pre-stage comparator detects that the measured signal exceeds the threshold voltage of the pre-stage and triggers it through the control logic circuit. The latter-stage comparator detects the measured signal, and outputs a current comparison result based on whether the measured signal exceeds the threshold voltage of the latter stage. The detection accuracy of the latter-stage comparator for the measured signal is higher than that of the former-stage comparator ; The reduction of power consumption means that the rear-stage comparator is in a dormant state before being triggered, and in this dormant state, the detection of the signal under test uses a lower-power-consumption front-stage comparator to replace a higher-power-consumption rear-stage comparator, Ther...
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IPC IPC(8): G01R19/165
CPCG01R19/165
Inventor 林毅竟满雪成王虎张波
Owner SG MICRO