Check patentability & draft patents in minutes with Patsnap Eureka AI!

Pre-driver stage with adjustable biasing

A pre-driver, bias current technology, used in the field of electrical systems

Pending Publication Date: 2021-08-27
TEXAS INSTR INC
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of multi-channel electronic systems, the power consumption / heat dissipation of IC components such as operational amplifiers becomes a challenge, which also brings design and cost issues

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
  • Pre-driver stage with adjustable biasing
  • Pre-driver stage with adjustable biasing
  • Pre-driver stage with adjustable biasing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] This article describes a pre-driver stage topology with adjustable bias current and related circuits and systems. In one example, a pre-driver stage is used to provide base current to bipolar junction transistors (herein "BJTs" or just "bipolar" transistors) of the output stage of an operational amplifier, where the output stage is biased using class AB. In the described example, the described pre-driver stage topology improves power efficiency over other pre-driver stage topologies by supporting lower quiescent current. In some examples, the pre-driver stage uses a small fixed bias current to ensure fast response of the pre-driver stage components. Furthermore, the pre-driver stage adds an adjustable bias current to the fixed bias current, wherein the adjustable bias current increases as the voltage difference across the first and second input terminals of the pre-driver stage increases. In one example, the voltage difference represents the difference between the inpu...

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 pre-driver stage with adjustable biasing. The invention relates to an electrical system (500) which includes a power supply (502) and an electrical circuit (504) coupled to the power supply (502) and including an operational amplifier (506). The operational amplifier (506) includes an input stage (202) and a pre-driver stage (204, 300, 400) coupled to the input stage (202), wherein the pre-driver stage (204, 300, 400) includes a first input terminal (302), a second input terminal (306), and a voltage supply terminal (302). The operational amplifier (506) also includes an output stage (210) with bipolar transistors coupled to the pre-driver stage (204, 300, 400). The pre-driver stage (204, 300, 400) is configured to: detect a voltage differential across the first and second input terminals (304, 306) of the pre-driver stage (204, 300, 400); and provide an adjustable bias current (Iadjust) based on the voltage differential.

Description

[0001] Cross References to Related Applications [0002] This application claims the U.S. interim Priority to Application Serial No. 62 / 982,142, the entire content of which provisional application is incorporated herein by reference. technical field [0003] Embodiments of the present application relate to an electrical system, and in particular, to an operational amplifier including a pre-driver stage with adjustable bias. Background technique [0004] The rapid development of electronic devices and integrated circuit (IC) technology has led to the commercialization of IC products. With the development of new electronic devices and the advancement of IC technology, new IC products are being commercialized. One example of an IC product needed in electronic devices is an operational amplifier. In one example operational amplifier, bipolar transistors are used in at least one stage of the operational amplifier. Example output stage topologies for operational amplifiers in...

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): H03K17/687H03K17/10
CPCH03K17/10H03K17/687
Inventor 马蒂因·弗里达斯·斯诺埃
Owner TEXAS INSTR INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com