Power-on reset circuit
An electric reset and circuit technology, applied in data reset devices, electrical components, electronic switches, etc., can solve the problems of poor reliability and high power consumption, and achieve the effects of high reliability, low dynamic power consumption and cost reduction
Active Publication Date: 2020-01-31
广州粒子微电子有限公司
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Problems solved by technology
[0003] With the continuous advancement of CMOS technology and the development requirements of SOC systems, POR circuits need to meet the requirements of low power consumption and high reliability. However, traditional POR circuits have relatively large defects in practical applications, mainly high power consumption and reliability. poor
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[0038] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited.
[0039] Such as figure 2 As shown, a power-on reset circuit is applied in the SOC chip of the Internet of Things, and has ultra-low power consumption. Including dynamic voltage generation circuit 1, two-stage operational amplifier comparator 2, RC delay unit 3, Schmitt trigger 4, D flip-flop 5, where:
[0040] The output end of described dynamic voltage generating circuit 1 is connected with two-stage operational amplifier comparator 2, provides positive and negative input voltage V for two-stage operational amplifier comparator 1 and V 2 ; The output terminal of the two-stage operational amplifier comparator 2 is connected with the input terminal of the RC delay unit 3, and is connected with the reset terminal of the D flip-flop 5 at the same time, by comparing the voltage value V 1 and V 2 To dete...
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The invention provides a power-on reset circuit, being applied to an SOC of Internet of Things. The power-on reset circuit comprises a dynamic voltage generation circuit, a two-stage operational amplifier comparator, an RC delay unit, a Schmitt trigger and a D trigger, and is characterized in that the output end of the dynamic voltage generation circuit is connected with the input end of the two-stage operational amplifier comparator; the output end of the two-stage operational amplifier comparator is respectively connected with the input end of the RC delay unit and the reset end of the D trigger; the output end of the RC delay unit is connected with the input end of the Schmitt trigger; the output end of the Schmitt trigger is connected with the sampling end of the D trigger through thephase inverter, and the output end of the Schmitt trigger is connected with the enabling end of the dynamic voltage generation circuit; and the output end Q of the D trigger outputs a power-on reset signal. According to the power-on reset circuit, the dynamic power consumption in the power-on process is low, and the power consumption in the static state is only p watt magnitude; the chip area canbe reduced, and the cost is reduced; and the power-on reset function can be accurately realized by quick / slow power-on and re-power-on, so that the reliability is extremely high.
Description
technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to a power-on reset circuit. Background technique [0002] A power-on reset circuit (Power-On Reset, hereinafter referred to as POR) is an indispensable module in a system-on-chip (SOC), and its main function is to ensure that the entire system starts correctly during power-on. The POR circuit maintains a low level during the rising process of the power supply voltage, so that each functional module, each circuit node voltage and logic level in the system are in a known state of being reset; until the power supply voltage stabilizes and reaches the normal operating voltage specified by the system. Quickly generate a high level to make the system run from a definite initial state, avoiding system error execution and destroying the normal working ability of the entire system. [0003] With the continuous advancement of CMOS technology and the development requirement...
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IPC IPC(8): H03K17/22G06F1/24
CPCH03K17/223G06F1/24H03K2217/0036
Inventor 邓进丽徐肯
Owner 广州粒子微电子有限公司