A reference voltage generation circuit with compensation loop and electronic equipment
A reference voltage and compensation circuit technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems such as large voltage temperature coefficients, achieve lower temperature coefficients, high output accuracy and stability, and solve high temperature coefficients Effect
Active Publication Date: 2019-12-10
苏州市相城区黄桥工业园经济发展有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the voltage temperature coefficient generated by the existing reference voltage generating circuit is relatively large, and to provide a reference voltage generating circuit with a lower temperature coefficient and electronic equipment
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[0009] The present invention provides a reference voltage generation circuit and electronic equipment with a compensation loop. In order to make the purpose, technical solution and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0010] As shown in Figure 1, a reference voltage generating circuit with a compensation circuit includes a start-up circuit, a reference voltage source circuit and a compensation circuit; the start-up circuit includes MOS transistors M9, M10, M11, M12 and M13, and MOS transistor M11 The source of M12 is connected to the input voltage VDD, the drain is connected to the gate and connected to the source of M12, the drain of M12 is connected to the gate and connected to the ga...
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The invention relates to the technical field of simulating circuits, in particular to a reference voltage generating circuit with a compensating circuit. The reference voltage generating circuit comprises a start circuit, a reference voltage source circuit and the compensating circuit. By means of the reference voltage generating circuit, the problems that the reference voltage source temperaturecoefficient is high and precision is reduced in the prior art are effectively solved; on the basis of a traditional reference voltage circuit, by adding the compensating circuit and start currents, the output voltage temperature coefficient is reduced, and high output precision and stability are achieved. The invention further provides an electronic device. The sensing precision of a microelectronic mechanical system sensor can be remarkably improved.
Description
technical field [0001] The invention relates to the technical field of analog circuits, in particular to a reference voltage generating circuit with a compensation loop and electronic equipment. Background technique [0002] The reference voltage generation circuit is the basic module unit in analog circuit design, mixed signal circuit design and digital design. Its function is to provide a reference voltage for the system that does not vary with temperature and power supply voltage. It has high precision, low power consumption, and high power supply rejection. The reference voltage generation circuit with low temperature coefficient is very important for the whole circuit. A traditional bandgap reference voltage can obtain a reference voltage with zero temperature coefficient by linearly superimposing two voltages with positive and negative temperature coefficients. The difference between the base-emitter voltages of two bipolar transistors is proportional to the absolute ...
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IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 李勇臣
Owner 苏州市相城区黄桥工业园经济发展有限公司