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Reference voltage driving circuit of analogue-to-digital converter

A technology of analog-to-digital converters and drive circuits, applied in the direction of analog-to-digital converters, physical parameter compensation/prevention, etc., can solve problems such as shortened recovery time, and achieve the effect of high speed and high precision

Active Publication Date: 2015-11-11
西安航天民芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the sampling rate increases, the recovery time available for the voltage of the reference voltage circuit becomes shorter

Method used

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  • Reference voltage driving circuit of analogue-to-digital converter
  • Reference voltage driving circuit of analogue-to-digital converter
  • Reference voltage driving circuit of analogue-to-digital converter

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Embodiment Construction

[0018] In order to further illustrate the invention, it will be further described below in conjunction with the accompanying drawings:

[0019] Such as figure 1 As shown in the present invention, a drive circuit for reference voltage of an analog-to-digital converter, the circuit module includes two reference voltage drive modules and a switched capacitor network. The voltage driving modules are respectively a voltage driving module Vtdriver and a voltage driving module Vbdriber, which are respectively used to drive the reference voltage to a high potential and a low potential. The driver has a voltage gain of 1. The switched capacitor network includes a Vt switched capacitor network and a Vb switched capacitor network. The Vt switched capacitor network is composed of a switch St1, a switch St2, a switch St3, a switch St4, a capacitor Ctp, a capacitor Ctn, a capacitor Ct, and a capacitor Ctx. The Vb switched capacitor network is composed of a switch Sb1 , a switch Sb2 , a s...

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PUM

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Abstract

The invention discloses a reference voltage driving circuit of an analogue-to-digital converter. The reference voltage driving circuit is characterized by comprising two reference voltage driving modules and two switched capacitor networks; the two switched capacitor networks are correspondingly connected with the two reference voltage driving modules. According to the reference voltage driving circuit of the analogue-to-digital converter, the relative establishment accuracy of the reference voltage driving circuit outputting voltage signals is improved, and therefore, higher-speed and higher-accuracy establishment is realized under the same power consumption.

Description

technical field [0001] The invention relates to the technical field of semiconductor integrated circuits, in particular to a driving circuit for a reference voltage of an analog-to-digital converter. Background technique [0002] In the past few decades, integrated circuit technology has been developed rapidly. Especially the electronic system headed by communication is constantly developing towards the direction of high speed, high performance, high integration and low cost. This puts forward higher requirements for each module in the system. such as an analog-to-digital converter. While the system requires improving the sampling rate and quantization accuracy of the analog-to-digital converter, it also hopes to improve the conversion efficiency of the analog-to-digital converter and reduce its power consumption. [0003] In a traditional high sampling rate analog-to-digital converter, an internal reference voltage driving circuit is often used to improve the driving acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12H03M1/06
Inventor 廖浩勤严伟
Owner 西安航天民芯科技有限公司