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

Apparatus and method for amplifier input protection

An amplifier and protection circuit technology, applied in the field of input protection circuit, can solve problems such as electromigration damage and amplifier damage

Active Publication Date: 2018-07-31
ANALOG DEVICES INC
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If protection is lacking, large input signals can lead to overvoltage conditions and / or high levels of power dissipation, which can lead to damage to the amplifier, such as damage to semiconductor junctions in metal lines and / or electromigration

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
  • Apparatus and method for amplifier input protection
  • Apparatus and method for amplifier input protection
  • Apparatus and method for amplifier input protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The following detailed description of certain embodiments presents various descriptions of specific embodiments of the invention. However, the invention can be embodied in many different ways, for example as defined and covered by the claims. In this specification, reference is made to the drawings, wherein like reference numerals may indicate identical or functionally similar elements.

[0015] Figure 1A An example of amplifier 10 is shown. Figure 1B shown connected in the configuration of the buffer 20 in the Figure 1A amplifier 10.

[0016] The amplifier 10 includes a first or non-inverting input voltage terminal VIP, a second or inverting input voltage terminal VIN, an output voltage terminal VOUT, an amplifier circuit 1 , and an input protection circuit 2 . The amplification circuit 1 comprises a first or non-inverting input, a second or inverting input and an output. The input protection circuit 2 includes a first input protection member 3 a , a second input...

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

Apparatus and methods for providing and amplifier input protection. In certain embodiments, the amplifier input protection circuit includes a first JFET electrically connected between the first input and the first output, and a second JFET electrically connected between the second input and the second output. Additionally, the first clamp is electrically connected to the first output, and the second clamp is electrically connected to the second output. The first current mirror mirrors the current through the first clamp and provides the mirrored current to a third JFET electrically connected between the source and the gate of the first JFET. In addition, the second current mirror mirrors the current through the second clamp and provides the mirrored current to a fourth JFET electrically connected between the source and the gate of the second JFET. Configuring the protection circuit in this manner can provide the advantages of low noise and low fault current at the same time.

Description

technical field [0001] Embodiments of the present invention relate to electronic systems, and more particularly to input protection circuits for amplifiers. Background technique [0002] Amplifiers, such as operational amplifiers or instrumentation amplifiers, may include input protection circuitry to protect the amplifier from large input signals. Without protection, large input signals can lead to overvoltage conditions and / or high levels of power dissipation, which can lead to damage to the amplifier, such as damage to semiconductor junctions in metal lines and / or electromigration. [0003] When the input voltage signal is within a safe voltage range, the input protection circuit can be used to provide the input signal to the amplifying circuit of the amplifier, so that the amplifier can amplify the input signal. For example, in one example, the input protection circuit may provide an input signal to the amplifier circuit when the voltage level of the amplifier input is ...

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): H03F1/52
CPCH03F3/45475H03F2203/45552H03F1/523H03F2200/441H03F2200/471H03F3/16
Inventor M·格斯滕哈伯R·詹森
Owner ANALOG DEVICES INC
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