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

Self-calibrating stable ldo regulator

A regulator, voltage follower technology, applied in the direction of regulating electrical variables, control/regulating systems, instruments, etc.

Active Publication Date: 2013-09-18
TEXAS INSTR INC
View PDF11 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As discussed above, conventional LDO regulators have very large R over the higher range of these frequencies OUT

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
  • Self-calibrating stable ldo regulator
  • Self-calibrating stable ldo regulator
  • Self-calibrating stable ldo regulator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The LDO regulator architecture described in this article internally closes the LDO regulation loop using known poles and zeros to ensure the stability of the analog output voltage VDDA and the digital output voltage VDD. A low impedance output is generated for the digital output voltage VDD using a replica source follower circuit. Guaranteed stability is obtained at the expense of a change in digital output voltage equal to VGST of the pass transistor. This is handled by building a slow digital error correction circuit around the output voltage that controls the size of the pass transistor within bounds to regulate the output voltage. This enables building an LDO regulator with 1 / 2 the power consumption of a custom built conventional LDO regulator in less than 1 / 3 the area of ​​a custom built conventional LDO regulator. Because small area construction is possible, multiple LDO regulators can be freely used to provide supply isolation between other circuits on the SoC a...

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 self-calibrating stable LDO regulator. A substantially unconditionally stable LOD regulator includes has first and second current paths. The first current path provides a reference current. The second current path receives an input voltage for developing a differential current with respect to the reference current based on the input voltage. The second current path has a sense resistor for sensing the differential current. A first current source biases the first and second current paths. A third current path senses the differential current and develops the input voltage in response thereto to control the differential current. A second current source biases the second current path. A first voltage follower circuit receives a first voltage on a first side of the sense resistor to provide an analog voltage output, and a second voltage follower circuit receives a second voltage on a second side of the sense resistor to provide a digital voltage output.

Description

technical field [0001] The various methods and circuit embodiments described herein relate generally to low dropout (LDO) regulators, and more specifically to all regulators that are substantially unconditionally stable and can be constructed using smaller capacitor structures or no capacitor structures. describes a self-calibrating stable LDO regulator of the type. Background technique [0002] LDO regulators are linear DC voltage regulators and are widely used in mixed-signal system-on-chip (SoC) devices. For example, today's SoCs may contain digital, analog, mixed-signal and often radio frequency functions, all on a single chip or substrate, which may form part of an embedded system, for example. Examples of some of the various circuits that may be found on an SoC may include amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), phase-locked loops (PLLs), and the like. [0003] Many mixed-signal SoC functions generate spurious emissions a...

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): G05F1/56
CPCG05F1/565
Inventor 阿贾伊·库马尔克里希纳斯瓦米·纳加拉杰
Owner TEXAS INSTR INC