Digital voltage stabilizer and voltage stabilization method thereof

A voltage stabilizer, digital technology, applied in the direction of instruments, electric variable adjustment, control/regulation system, etc., can solve the problems of low control precision, long time for stable voltage, fast response speed, etc.

Active Publication Date: 2019-06-28
HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among them, if the transistors of the PMOS transistor array choose transistors with larger currents, we can quickly reach the stable voltage we want, but the control accuracy is low; if the transistors of the PMOS transistor array choose transistors with smaller currents, higher control can be achieved. Accuracy, but the time required to stabilize the voltage is longer
It is difficult for traditional digital regulators to achieve fast response and high output voltage accuracy

Method used

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  • Digital voltage stabilizer and voltage stabilization method thereof
  • Digital voltage stabilizer and voltage stabilization method thereof
  • Digital voltage stabilizer and voltage stabilization method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] Such as figure 1 As shown, this embodiment provides a digital voltage regulator, including: a first comparator 1, a line switching unit 2, a voltage regulation control unit 3, a first transistor array 4, and a second transistor array 5; wherein, the first transistor The width-to-length ratio of the transistors in the array 4 is greater than the width-to-length ratio of the transistors in the second transistor array 5 .

[0063] Specifically, the first comparator 1 is used to output the first reference voltage V ref and the output voltage of the digital regulator output V out The comparison result; the voltage regulation control unit 3 is used to generate a voltage regulation signal according to the comparison result of the first comparator 1 under the control of the clock signal; the line switching unit 2 is used to generate a voltage regulation signal according to the output voltage V out with the second reference voltage V ref-H and the third reference voltage V r...

Embodiment 2

[0082] combine figure 2 As shown, this embodiment provides a digital voltage regulator, including: a first comparator 1, a line switching unit 2, a voltage regulation control unit 3, a first transistor array 4, and a second transistor array 5; wherein, the first transistor The width-to-length ratio of the transistors in the array 4 is greater than the width-to-length ratio of the transistors in the second transistor array 5 . In particular, the voltage regulation control unit 3 in this embodiment includes a first voltage regulation control module 31 and a second voltage regulation control module 32 . Wherein, the first voltage regulation control module 31 is connected between the line switching unit 2 and the first transistor array 4, and the first voltage regulation control module 31 is used to conduct with the first comparator 1 under the control of the line switching unit 2 , under the control of the first clock signal CLK1, the first voltage regulation signal is generate...

Embodiment 3

[0097] combine image 3 As shown, this embodiment provides a digital voltage regulator, including: a first comparator 1, a line switching unit 2, a first voltage regulation control module 31, a second voltage regulation control module 32, a first transistor array 4 and a second Two transistor arrays 5; wherein, the width-to-length ratio of the transistors in the first transistor array 4 is greater than the width-to-length ratio of the transistors in the second transistor array 5 . In particular, the first voltage regulation control module 31 in this embodiment includes a first shift register 311 , and the second voltage regulation control module 32 includes a second shift register 321 . Wherein, the first end of the first shift register 311 is connected to the line switching unit 2, the second end is connected to the first transistor array 4, and the control end is connected to the first clock signal end; the first end of the second shift register 321 is connected to the The ...

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Abstract

The invention provides a digital voltage stabilizer and a voltage stabilization method thereof, and belongs to the technical field of power supply management equipment. The digital voltage stabilizercomprises a first comparator, a line switching unit, a voltage conditioning control unit, a first transistor array and a second transistor array; the width to length ratio of transistors in the firsttransistor array is high than that of transistors in the second transistor array; the first comparator outputs a comparison result between a first reference voltage and an output voltage; the voltageconditioning control unit generates a voltage conditioning signal according to the comparison result of the first comparator under control of a clock signal; and according to a comparison result between the output voltage and second and third reference voltages as well as the voltage conditioning signal output by the control unit, the line switching unit controls either the first or the second transistor array to switch on transistor in the corresponding number so as to adjust the output voltage.

Description

technical field [0001] The invention belongs to the technical field of power management equipment, and in particular relates to a digital voltage stabilizer and a voltage stabilizing method thereof. Background technique [0002] Low Dropout Regulator (LDO: Low Dropout Regulator) digital voltage regulator has been widely used as a power management circuit in portable electronic devices, wireless energy transmission systems and other fields. In the traditional D-LDO structure digital regulator, after the output voltage Vout is compared with the reference voltage Vref, the comparison result is output to the counter to control the increase or decrease of the counter value, and the counter transmits the value to the decoder for decoding, and the decoder then according to The decoded signal controls the turn-on number of transistors in a group of PMOS transistor arrays to adjust the output voltage, and the output voltage Vout is fed back to the comparator for comparison with the r...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56G05F1/468G05F1/575
Inventor冯雪欢李永谦
OwnerHEFEI XINSHENG OPTOELECTRONICS TECH CO LTD