Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Compensation method for more input computing amplifiers and its output voltage

A technology of operational amplifiers and compensation methods, which is applied in the direction of improving amplifiers to reduce temperature/power supply voltage changes, differential amplifiers, DC-coupled DC amplifiers, etc., which can solve problems such as errors and achieve the effect of improving accuracy

Active Publication Date: 2016-03-23
NOVATEK MICROELECTRONICS CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this gm H and gm L The difference between them also causes errors in the output voltage Vo of the multi-input operational amplifier 100 under the specific combination of input voltages V1~VK, which cannot be ideally shown in Table 1.

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
  • Compensation method for more input computing amplifiers and its output voltage
  • Compensation method for more input computing amplifiers and its output voltage
  • Compensation method for more input computing amplifiers and its output voltage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] In the following, a number of implementation examples are provided for the compensation method of the output error of the multi-input operational amplifier, so that those skilled in the art can understand and implement.

[0034] image 3 It is a flowchart of a compensation method for an output error according to an embodiment. This output error compensation method 300 is suitable for applications such as figure 1 The multi-input operational amplifier shown. Figure 4 Then it is a schematic diagram of a multi-input operational amplifier 400 according to an embodiment. Please refer to the following image 3 and Figure 4 for easy understanding.

[0035] It is worth noting that the following is the compensation method 300 using the output error applied to Figure 4 Four-input operational amplifier 400 to explain the details of the process. However, the output error compensation method 300 can be applied to multi-input operational amplifiers with various numbers of i...

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

A compensation method for a multi-input operational amplifier and its output voltage. The steps of the compensation method include: first, aiming at the situation where the input voltages received by the differential pair are a specific level combination, to obtain multiple original spans of the differential pair respectively. conductance value; and based on multiple original transconductance values, obtain a transconductance difference value of each of the differential pairs that need to be adjusted; and then based on the transconductance difference value and the original transconductance value, obtain the need to adjust The adjusted transconductance value of each differential pair; finally, use the adjusted transconductance value to adjust the transconductance of the differential pair that needs to be adjusted, so that the output voltage is uniform under various combinations of input voltages. Meet expectations.

Description

technical field [0001] The invention relates to a multi-input operational amplifier, and in particular to a compensation method for the output error of the multi-input operational amplifier. Background technique [0002] In consideration of reducing the layout area of ​​an integrated circuit (Integrated Circuit, IC), output buffers of many display driving ICs are constructed by using multi-input operational amplifiers. This multi-input operational amplifier can generate a combined output voltage by interpolating several different voltage values. [0003] Please refer to figure 1 The internal circuit diagram of the input stage of a known multi-input operational amplifier is shown. Such as figure 1 As shown, the input stage of the multi-input operational amplifier has K differential pairs, where K is a positive integer greater than 1, such as 4. Each differential input pair has an input end coupled to an output end of the multi-input operational amplifier for receiving the...

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 Patents(China)
IPC IPC(8): H03F3/45H03F1/30
Inventor 黄如琳卓均勇刘育韶
Owner NOVATEK MICROELECTRONICS CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com