Power-on reset circuit
A technology of electric reset and circuit, applied in the direction of electrical components, electronic switches, pulse technology, etc., can solve the problems of inconvenient use, low accuracy range, and great influence of threshold voltage, etc., and achieve the effect of increasing the application range
Inactive Publication Date: 2020-12-25
SUZHOU KUNYUAN MICROELECTRONICS
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[0003] The existing power-on reset circuit generally adopts a structure based on a MOS transistor. However, the threshold voltage of a power-on reset circuit based on a MOS transistor structure is greatly affected by the MOS transistor process, and the accuracy range is low; or a bandgap (bandgap reference)-based structure, however, the structure of bandgap is complicated, and bandgap needs to be started first, which is inconvenient to use
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[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0024] figure 1 A schematic diagram of the circuit structure of a power-on reset circuit provided by an embodiment of the present invention, refer to figure 1 , the power-on reset circuit includes: a first resistive element R1, a second resistive element R2, a third resistive element R3, a fourth resistive element R4, a first transistor Q1, a second transistor Q2, a Triode Q3, the first inverter INV1 and the second inverter INV2; the first resistive element R1 is electrically connected to the input terminal Vin o...
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The invention discloses a power-on reset circuit. The circuit comprises a first resistive element, a second resistive element, a third resistive element, a fourth resistive element, a first triode, asecond triode, a third triode, a first inverter and a second inverter. The first resistive element is electrically connected with the input end of the power-on reset circuit, and a second end is electrically connected with the collector of the first triode and the base of the first triode. The emitter of the first triode is grounded. A first end of the second resistive element is electrically connected with a first end of the first resistive element, and a second end is electrically connected with the collector of the second triode. The base of the second triode is electrically connected withthe base of the first triode, the emitter is electrically connected with a first end of the third resistive element, and a second end of the third resistive element is grounded. The base of the thirdtriode is electrically connected with the collector of the second triode, the emitter is grounded, and the collector is electrically connected with the input end of the first inverter. According to the invention, an accurate threshold voltage can be generated without band-gap reference.
Description
technical field [0001] Embodiments of the present invention relate to a power-on reset technology, and in particular to a power-on reset circuit. Background technique [0002] As power-on reset circuits (Power On Reset, POR) are more and more widely used in various chip systems, the performance requirements for power-on reset circuits are also getting higher and higher. [0003] The existing power-on reset circuit generally adopts a structure based on a MOS transistor. However, the threshold voltage of a power-on reset circuit based on a MOS transistor structure is greatly affected by the MOS transistor process, and the accuracy range is low; or a bandgap (bandgap reference)-based However, the structure of bandgap is complicated, and bandgap needs to be started first, which is inconvenient to use. Contents of the invention [0004] The invention provides a power-on reset circuit, which can generate accurate threshold voltage without a bandgap reference. [0005] An embod...
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IPC IPC(8): H03K17/22
CPCH03K17/22
Inventor 孙波杨逢春
Owner SUZHOU KUNYUAN MICROELECTRONICS