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A Linear Regulator Combining a Reference and an Operational Amplifier

A linear voltage regulator, combining two into one technology, applied in the direction of instruments, control/regulation systems, and adjusting electrical variables, etc., can solve the problem of large static power consumption, achieve simple circuit, improve static power consumption, and achieve performance and cost effect

Active Publication Date: 2022-04-29
江苏长晶科技股份有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is: the circuit structure of the linear voltage regulator includes a reference circuit and an operational amplifier circuit at the same time, and there is a problem that the static power consumption is relatively large. Still has static power issues and increases circuit cost

Method used

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  • A Linear Regulator Combining a Reference and an Operational Amplifier
  • A Linear Regulator Combining a Reference and an Operational Amplifier
  • A Linear Regulator Combining a Reference and an Operational Amplifier

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Embodiment Construction

[0014] The implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0015] figure 1 It is a traditional linear regulator circuit architecture, including a reference circuit VREF, EA is an error amplifier, that is, a method circuit, P1 is an enhanced PMOS field effect transistor, an output power transistor, and R1 and R2 are feedback resistors.

[0016] exist image 3 In the traditional depletion-type reference circuit shown, ND1 is a depletion-type NMOS field effect transistor, and NE1 is an enhancement-mode NMOS field-effect transistor. The gate of depletion-type ND1 is connected to the source, and the substrate is connected to the source. The gate and drain of the enhancement tube NE1 are connected. By connecting the depletion tube in series with the intensifier tube and adjusting the size ratio of ND1 and NE1, a reference voltage Vref with zero temperature coefficient is formed.

[0017] Figure 4 The low-voltage l...

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Abstract

A linear regulator that combines a reference and an operational amplifier into one. By introducing a dissipative reference, the dissipative reference is used as both the reference and the first stage of the operational amplifier, so that the operational amplifier and the reference are integrated into one without Need to start the circuit, the circuit is extremely simple, on the basis of realizing the performance of the linear regulator circuit, since the depletion reference is used as both the reference and the first stage of the op amp, it can also significantly improve the static power consumption of low-power applications. Thus achieving the best combination of performance and cost.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, relates to a linear voltage regulator used for power supply management, and is a linear voltage regulator in which a reference and an operational amplifier are combined into one. Background technique [0002] With the widespread use of portable electronic products in all aspects of work and life, higher requirements are placed on the performance of the power supply, especially the low power consumption performance of the system. The traditional linear regulator can provide excellent anti-power interference ability, and is widely used in circuit design, such as figure 1 As shown, since both the reference circuit and the op amp circuit must be included in the architecture, this structure usually brings other problems, such as high static power consumption because both the reference circuit and the op amp circuit need to consume current, which will limit battery life, reducing the opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 杨国江王海波
Owner 江苏长晶科技股份有限公司
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