Electrifying reset and undervoltage turnoff circuit
A technology of shutting off the circuit and electrical reset, applied in the direction of electronic switches, data reset devices, electrical components, etc., can solve the problems of poor circuit adaptability to process angle and temperature, difficult to control reset signal, large current consumption, etc., to save energy Power consumption and area, the effect of small chip area and reliable operation
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[0016] Such as figure 2 As shown, the power-on reset and undervoltage shutdown circuit includes a voltage division follower circuit 1, a voltage comparator 2, a delay buffer circuit 3 and a reset shutdown circuit 4, and the voltage division follower circuit 1 is composed of two The two-way detection circuit generates two outputs to the voltage comparator 2 for comparison. The output of the voltage comparator 2 is delayed and shaped by the delay buffer circuit 3 to generate a power-on reset (power-on reset) POR signal output. Break circuit 4 can make input EN to decide the timing of reset.
[0017] Such as image 3 As shown, one of the two detection circuits described above uses capacitors C1 and C2 in series to divide the voltage to detect the power supply voltage. The accurate voltage division ratio can be obtained by using capacitors to divide the voltage. Circuits can also be placed under the capacitors to save chip area and have no static power. consumption. The other ...
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