Reference circuit structure in voltage stabilizing system

A reference circuit and circuit technology, which can be used in control/regulating systems, regulating electrical variables, instruments, etc., and can solve problems such as high power consumption and large chip area.

Inactive Publication Date: 2018-03-02
丹阳恒芯电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method can be designed with a bandgap reference circuit, but its power consumption is relatively large, and resistors and transistors are needed, resulting in a large chip area

Method used

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  • Reference circuit structure in voltage stabilizing system

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Embodiment Construction

[0013] combine figure 1 As shown, in the following embodiments, the reference circuit structure in the voltage stabilizing system at least includes: a start-up circuit that drives the reference circuit through a single NMOS transistor; an operational amplifier circuit that adopts a self-biased differential structure , to minimize the impact of current changes on the circuit; a core reference circuit, the accuracy of the reference current and reference voltage generated is very high, and the temperature coefficient can be adjusted according to the actual test situation. Since the entire circuit does not use resistors, No triode is used either, so the overall circuit area is also very small. For the voltage regulation system, the reference circuit with low power consumption is very advantageous.

[0014] The start-up circuit is composed of capacitor C1, NMOS tubes NM10 and NM11. When the power supply VDD is powered on, the voltage across the capacitor C1 will not change suddenl...

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PUM

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Abstract

The invention discloses a reference circuit structure in a voltage stabilizing system. The structure includes a starting circuit, an operational amplifier circuit, and a core reference circuit; the starting circuit is used for driving the reference circuit, starting is more stable, and the system is more stable; the operational amplifier circuit adopts a self-biased differential structure, and theinfluence of current change on the circuit is reduced to the greatest extent; the core reference circuit generates core reference current and reference voltage, the accuracy of generating the reference voltage is very high, since no resistors and triodes are adopted in the whole circuit, MOS transistors are adopted, the area of the whole circuit is thus very small, and according to the test situation, the temperature coefficient of the circuit can be adjusted.

Description

technical field [0001] The invention relates to the field of reference voltage circuits, in particular to a reference circuit structure in a voltage stabilizing system. Background technique [0002] In the Internet of Things and most wireless communication applications, the relevant receiving circuits or transmitting circuits require low power consumption and small area. These systems need to use a voltage regulator system, so low power consumption and small area are important for reference Circuit is very critical and very necessary. As an important part of the analog circuit, the voltage stabilizing system, and the reference circuit is an important part of the voltage stabilizing system, generally needs to work normally in a wide temperature range, so not only requires low power consumption, but also requires stable performance, which has a relatively Good temperature characteristics, it is best to occupy a small area. The traditional method can be designed with a bandga...

Claims

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Application Information

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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 沈怿皓
Owner 丹阳恒芯电子有限公司
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