Voltage reference source circuit with high-order temperature compensation in full temperature section
A high-order temperature compensation and temperature compensation circuit technology, applied in the field of power supply, can solve the problems of low temperature coefficient and difficult to achieve, and achieve the effect of reducing temperature coefficient and improving stability
Pending Publication Date: 2019-03-26
西安航天民芯科技有限公司
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Problems solved by technology
The accuracy and stability of the reference voltage source of the core module directly determine the accuracy of the entire system. In order to better adapt to the development of analog and digital-analog hybrid circuits, the performance of the reference voltage source needs to be further improved to provide a stable circuit for the entire circuit. A reference source with small fluctuations with temperature changes, but in the prior art, the general reference only performs first-order compensation and it is difficult to achieve a lower temperature coefficient
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[0027] Such as figure 1 As shown, the full temperature range high-order compensation reference source involved in the present invention includes traditional first-order temperature compensation, high-order temperature compensation in the middle temperature section, temperature compensation in the high temperature section, and temperature compensation in the low temperature section. figure 1 The circuit is roughly divided into four parts: the first-order temperature compensation circuit, the middle temperature temperature compensation circuit, the bias voltage generation circuit, and the high and low temperature temperature compensation circuit. The following will analyze and describe these four parts respectively.
[0028] The first-order temperature compensation circuit includes NPN transistors Q1, Q2, Q3, Q4, Q6, Q7, Q8, P-type MOS transistors M1, M2, M3, and resistors R1, R3, R4, R5. The gate of the P-type MOS transistor M1 is connected to a bias voltage VB1, and the area o...
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The invention provides a voltage reference source circuit with high-order temperature compensation in a full temperature section, which is characterized by comprising a PTAT generation circuit module,a non-linear negative temperature coefficient current generation circuit module, a proportion superposition output circuit module, a bias circuit module, a high-temperature-section temperature compensation circuit module and a low-temperature-section temperature compensation circuit module. The reference voltage source provided by the invention adopts various temperature compensation modes to compensate the reference and greatly improves the temperature characteristics of the reference.
Description
technical field [0001] The invention relates to the field of power supplies, in particular to a voltage reference source circuit with high-order temperature compensation in all temperature ranges. Background technique [0002] In recent years, the consumer electronics market has continued to expand, and the field of integrated circuit power supplies has also expanded rapidly. With the increasingly high performance requirements of products, the performance requirements of power supply ICs have also become more and more stringent. The accuracy and stability of the core module reference voltage source directly determine the accuracy of the entire system. In order to better adapt to the development of analog and digital-analog hybrid circuits, the performance of the reference voltage source needs to be further improved to provide a stable circuit for the entire circuit. A reference source with small fluctuations with temperature changes, but in the prior art, it is difficult to ...
Claims
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Login to View More IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 王晓飞陈婷张龙
Owner 西安航天民芯科技有限公司