Bandgap Reference Voltage Generator
A reference voltage and voltage technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems such as reference voltage changes, achieve the effect of weakening the impact and improving radiation resistance performance
Active Publication Date: 2019-10-29
北京中科微投资管理有限责任公司
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Problems solved by technology
[0005] The embodiment of the present application provides a bandgap reference voltage generating device, which solves the technical problem in the prior art that the reference voltage output by the bandgap reference circuit changes due to the influence of the total dose radiation effect, and effectively improves the bandgap Benchmark Radiation Hardness
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[0023] In the prior art, a bandgap reference circuit with a general structure can generate a bandgap reference voltage that does not vary with temperature and power supply voltage, but does not have the ability to resist total dose radiation. When the general-purpose bandgap reference circuit works in a radiation environment, the radiation will induce the PN junction to increase the leakage current of the base of the triode, and the current gain will decrease, so that the output voltage of the bandgap reference circuit of the bandgap reference circuit will change. In view of this, the embodiment of the present invention solves the technical problem in the prior art that the reference voltage output by the bandgap reference circuit changes due to the influence of the total dose radiation effect by providing a bandgap reference voltage generator, effectively improving anti-radiation performance.
[0024] In order to make the purpose, technical solutions and advantages of the emb...
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The invention discloses a bandgap reference voltage generating device, and belongs to the field of integrated circuits. The bandgap reference voltage generating device comprises a body circuit, a first compensation circuit and a second compensation circuit, wherein the body circuit is used for generating bandgap reference voltage. Under non-radiation conditions, voltage at the first current compensation end of the first compensation circuit is equal to first voltage, and voltage at the second current compensation end of the second compensation circuit is equal to second voltage. Under radiation conditions, the first compensation circuit is used for providing first compensation current for the inverse-phase input end of an operational amplifier in the body circuit, so that voltage at the inverse-phase input end keeps consistent with that before irradiation; the second compensation circuit is used for providing second compensation current for the same-phase input end of the operational amplifier, so that voltage at the same-phase input end keeps consistent with that before irradiation. The bandgap reference voltage generating device effectively improves anti-radiation performance ofbandgap reference.
Description
technical field [0001] The invention relates to the field of integrated circuits, in particular to a bandgap reference voltage generating device. Background technique [0002] Voltage reference circuits that are independent of power supply voltage and temperature are widely used in various analog circuits, such as voltage regulators, A / D, D / A converters, etc. For some special applications, such as aerospace equipment and high-energy physics experimental circuits working in radiation environments, the voltage reference circuit is also a very important module. At this time, the requirement for the reference circuit is not only the ability to output a stable voltage, but its output characteristics do not change with the radiation dose, that is, the radiation resistance hardening ability also plays a vital role in the reliability of the equipment. [0003] In the past, radiation-resistant hardened application-specific integrated circuits (ASICs) for space applications were usua...
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IPC IPC(8): G05F1/565G05F1/567
CPCG05F1/565G05F1/567
Inventor 徐子轩李博刘海南罗家俊
Owner 北京中科微投资管理有限责任公司