Unlock instant, AI-driven research and patent intelligence for your innovation.

Dynamic biasing circuit of linear voltage regulator

A linear regulator and bias circuit technology, applied in instruments, regulating electrical variables, control/regulating systems, etc., can solve the problem that LDOs are difficult to achieve extremely high transient response, and loads in different working states cannot achieve adaptive static power consumption. Adjustment and other issues to achieve adaptive power adjustment, improve transient response performance, and simple structure

Pending Publication Date: 2022-02-11
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical defects that low-power LDOs are difficult to achieve extremely high transient response and loads in different working states and adaptive static power consumption adjustment, and propose a dynamic bias circuit for linear voltage regulators

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dynamic biasing circuit of linear voltage regulator
  • Dynamic biasing circuit of linear voltage regulator
  • Dynamic biasing circuit of linear voltage regulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A dynamic bias circuit of a linear voltage regulator, compared with the existing voltage regulator bias structure, can realize low power consumption, ultra-high transient response and self-adaptive bias adjustment. figure 1 It is a flow chart of the dynamic bias circuit working process of the linear voltage regulator of the present invention, and its adjustment process is as follows:

[0034] Step 1. First, measure the output voltage of the linear regulator.

[0035] Step 2. Then, differential calculation is performed on the output voltage obtained in step 1 to obtain the rate of change of the output voltage.

[0036] Step 3. Finally, the bias of the linear regulator is adjusted based on the rate of change of the output voltage obtained in step 2 to realize dynamic bias.

[0037] figure 2 It is the structural diagram of the dynamic bias circuit of the linear regulator provided by the present invention. This system is used to monitor the LDO output voltage and dynami...

Embodiment 2

[0058] The dynamic bias circuit of the linear voltage regulator described in this application can also be used as a bias circuit of an independent linear voltage regulator chip. In an independent chip design, the dynamic bias circuit of the linear voltage regulator described in this application is the same as that in Embodiment 1:

[0059] Including a current reference circuit 101, a differentiator bias circuit 102, a differentiator circuit 103 and a linear voltage regulator bias circuit 104;

[0060] Wherein, the current reference circuit 101 is used to generate a stable current reference, which is implemented using a bandgap current source to ensure performance under full temperature conditions;

[0061] Wherein, the differentiator bias circuit 102 is used to generate a bias voltage for the differentiator circuit 103, which is realized by using a bias MOS tube and a current mirror;

[0062] Wherein, the differentiator circuit 103 is used to detect the output voltage of the ...

Embodiment 3

[0067] The dynamic bias circuit of the linear voltage regulator described in this application can also be constructed as a digital circuit to complete the same function. In digital dynamic bias structure design, such as Figure 7 The dynamic bias circuit of the linear voltage regulator provided by the present invention is shown in the structural diagram under the digital circuit structure:

[0068] Includes clock sources, analog-to-digital converters, digital differentiators, bias current switch networks, and linear regulator bias circuits;

[0069] Wherein, the clock source is used to generate a stable clock signal, and is used to provide a stable clock signal to the analog-to-digital converter and the digital differentiator;

[0070] Among them, the analog-to-digital converter is used to sample the output voltage of the linear voltage regulator, and convert it into a digital signal for subsequent processing circuits.

[0071] Wherein, the digital differentiator is used to ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a dynamic biasing circuit of a linear voltage regulator, and belongs to the technical field of design of integrated circuits and linear voltage regulators. The dynamic biasing circuit includes a current reference circuit, a differentiator biasing circuit, a differentiator and a linear voltage regulator biasing circuit, wherein the differentiator biasing circuit is connected with the current reference circuit and the differentiator. The differentiator is connected with the differentiator bias circuit; and the linear voltage regulator biasing circuit is connected with the differentiator. The output voltage of the linear voltage regulator is input into the differentiator; the differentiator differentiates the output voltage of the linear voltage regulator to obtain an output voltage change rate; and a biasing current of the linear voltage regulator is output in a positive correlation manner by taking the output voltage change rate as a standard, and a biasing circuit of the linear voltage regulator is dynamically adjusted according to the biasing current. According to the circuit, the transient response performance of the LDO can be effectively improved, and self-adaptive power consumption adjustment is achieved.

Description

technical field [0001] The invention relates to a dynamic bias circuit of a linear voltage regulator, which belongs to the technical field of integrated circuit and linear voltage regulator design. Background technique [0002] In a system on chip (System on Chip, SoC), a linear voltage regulator is used as a power supply of the SoC, and is one of the essential key components of all SoCs. With the development of integrated circuit technology in recent years, linear regulators are also developing towards lower static power consumption, lower settling time, and no external capacitors. However, according to analog circuit design experience, static power consumption and response speed are two mutually restraining parameters, and traditional methods cannot optimize both to the extreme. Considering that recent digital systems dynamically adjust clock frequency according to processing requirements to reduce power consumption, low-dropout linear regulators (Low-Dropout Regulator, L...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 解尧明张蕾李潇然陈志铭王兴华刘堃杨佳衡
Owner BEIJING INSTITUTE OF TECHNOLOGYGY