Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Implementation system of low-voltage reference source

A technology for realizing system and reference source, applied in the field of realizing low-voltage reference source system, it can solve the problems of high internal resistance, image mixed with streak interference, and few types, so as to reduce output load, reduce reference voltage fluctuation, and achieve flexible application. Effect

Active Publication Date: 2016-05-25
长春长光精密仪器集团有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that the existing low-voltage reference voltage source lower than 1.2V has few types and high internal resistance, and when connecting a switch capacitive load, interference glitches are easily superimposed on the reference voltage, resulting in mixed stripe interference in the image output by the image sensor. , providing a realization system of low-voltage reference source

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
  • Implementation system of low-voltage reference source

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0013] Specific implementation mode 1. Combination figure 1 Describe this implementation mode, a low-voltage reference source realization system,

[0014] The reference source and its resistor divider circuit generate the required reference voltage through voltage division, and the noise of the reference source is filtered by the first RC passive low-pass filter circuit; the voltage output by the power supply is used as the power supply of the operational amplifier, and the second The RC passive low-pass filter circuit filters the noise of the power supply to reduce the noise to the output of the operational amplifier; on the one hand, the active low-pass filter circuit composed of the operational amplifier filters out high-frequency noise, allowing low-frequency DC signals to pass through, and on the other hand uses The low output resistance characteristic of the operational amplifier improves its load capacity; the output voltage of the active low-pass filter circuit compose...

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 an implementation system of a low-voltage reference source. The implementation system solves the existing problem of stripe interference mixed in an image output by an image sensor caused by the facts that low-voltage reference sources of lower than 1.2V are small in variety and high in internal resistance, superimposed interference for burrs is easy on reference voltage when the capacitive load of a switch is connected. The implementation system comprises a reference source, a resistance voltage division circuit, a first RC passive low-pass filtering circuit, a power supply, a second RC passive low-pass filtering circuit, an active low-pass filtering circuit consisting of an operational amplifier, serially connected resistors, a high-capacity ceramic capacitor and an image sensor. The implementation system uses a topological structure that the operational amplifier follows after voltage division of an existing high-voltage reference source, the load capacitors of the switch inside the high-capacity ceramic capacitor and the image sensor are used to be connected in parallel to reduce the fluctuation of reference voltage, and external disturbance is reduced by using the low-pass filtering circuit.

Description

technical field [0001] The invention relates to a realization system of a low-voltage reference source, in particular to a realization system of a low-voltage reference source applied to a capacitive switching load of an image sensor. Background technique [0002] In today's image sensor applications, a variety of reference voltage sources are required, especially low voltage reference sources with voltages below 1.2V. Using a low-voltage reference source built inside the image sensor can not only improve reliability, but also reduce volume and weight. However, when the load is a switching capacitor, interference glitches will appear on the reference voltage, and the output image will be mixed with fringe interference. There are few types of low-voltage reference voltage sources with a voltage lower than 1.2V on the market, and most of them have high internal resistance, which cannot meet the application requirements of switched capacitor loads. [0003] Therefore, the pres...

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): G05F1/46
CPCG05F1/461
Inventor 余达刘金国孔德柱李广泽赵莹景岩李嘉
Owner 长春长光精密仪器集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products