Power-on reset/power-down detection circuit with zero static power consumption and its realization method
A technology of power-down detection and static power consumption, which is applied in the direction of electrical components, electronic switches, pulse technology, etc., can solve the problems of large circuit area, large static power consumption, and the inability to realize the power-down detection function, and achieve strong driving ability , Zero static power consumption, achieve the effect of static power consumption
Active Publication Date: 2020-08-28
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology
Although this circuit can realize the power-on reset function, it has the following problems: 1) it cannot realize the power-down detection function, 2) when the power supply voltage is stable, there is a large static power consumption, 3) there is a high resistance in the circuit design value resistors, larger circuit area
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[0046] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0047] see Figure 2 to Figure 5 . It should be noted that the diagrams provided in this embodiment are only schematically illustrating the basic idea of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and shape of the components in actual implementation. Dimensional drawing, the type, quantity and proportion of each component can be changed arb...
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The invention provides a power-on reset / power-off detection circuit with zero static power consumption and a realization method thereof. The circuit comprises a power-on reset module which is used fordetecting a power supply voltage when power-on is carried out and generating a power-on step signal when the power supply voltage is greater than a first threshold voltage; a power-off detection module which is connected with the power-on reset module and is used for detecting the power supply voltage when power-off is carried out and generating a power-off step signal when the power supply voltage is smaller than a second threshold voltage; a waveform integration module which is connected with the power-on reset module and the power-off detection module and is used for carrying out waveformintegration on the power-on step signal and the power-off step signal and generating a power-on reset step signal and a power-off detection step signal; and a pulse generation module which is connected with the waveform integration module and is used for processing the power-on reset step signal and the power-off detection step signal and generating a power-on reset pulse signal and a power-off detection pulse signal. Through application of the circuit and the method, various problems existing in the existing power-on reset circuit are solved.
Description
technical field [0001] The invention belongs to the field of circuit design, in particular to a power-on reset / power-down detection circuit with zero static power consumption and a realization method thereof. Background technique [0002] Power-on reset (Power-on reset) circuits are widely used in various digital circuits and digital-analog hybrid circuits, and are used to reset unit circuits such as flip-flops, registers, and latches to ensure that the unit circuits are can start normally. [0003] Existing power-on reset circuits such as figure 1 As shown, in the initial state, all nodes in the circuit are at zero potential; when the power supply voltage rises from zero to the threshold voltage of M2, the M2 tube is turned on, and the gate voltage of M5 is pulled down, M5 is turned on, and the potential of the OUT terminal increases with the power supply voltage. Variety. When the power supply voltage reaches the sum of the threshold voltage of M2 tube and M1 tube, M1 a...
Claims
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IPC IPC(8): H03K17/22
CPCH03K17/223
Inventor 郭家树陈后鹏宋志棠
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI