Analog-to-digital converter and electronic equipment

An analog-to-digital converter and level technology, which is applied in the direction of analog-to-digital converters, etc., can solve the problems of low sampling accuracy and low sampling accuracy of the bootstrap circuit.

Active Publication Date: 2012-07-11
昆山启达微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In various specific bootstrap circuits in the prior art, charge injection and clock feedthrough will affect the input signal Vin, and the sampling accuracy is low
[0012] It can be seen that there is a problem in the prior art: the sampling accuracy of the bootstrap circuit is low

Method used

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  • Analog-to-digital converter and electronic equipment
  • Analog-to-digital converter and electronic equipment
  • Analog-to-digital converter and electronic equipment

Examples

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Embodiment Construction

[0044] A detailed description will be given below in conjunction with the accompanying drawings and embodiments.

[0045] In the embodiment of the present invention, CMOS transistors are preferably used to realize the CMOS gate voltage bootstrap switch circuit in the analog-to-digital converter. Other transistors are also applicable to realize the gate voltage bootstrap switch circuit. In this embodiment, the CMOS gate voltage bootstrap switch circuit is as follows: image 3 shown, yes figure 1 , 2 The specific implementation of the gate voltage bootstrap switch circuit is shown.

[0046] The analog-to-digital converter includes twelve transistors and two capacitors. In this embodiment, the first NMOS transistor and the first transistor describe the same device, and the first NMOS transistor is used for description only In order to make it easier for the reader to understand the type of the transistor, the rest of the transistors are similar. The second transistor, the four...

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PUM

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Abstract

The invention provides an analog-to-digital converter and electronic equipment and belongs to the field of analog circuit design. According to a gate-voltage bootstrapped switch circuit in the analog-to-digital converter, two transistors are connected with each other through a transmission gate (TG) and connected with an input signal Vin. By connecting the two transistors through the TG, influence of charge injection and clock feed-through on the input signal Vin can be effectively eliminated, and sampling accuracy is improved.

Description

technical field [0001] The invention relates to the field of analog circuit design, in particular to an analog-to-digital converter and electronic equipment. Background technique [0002] With the rapid development of integrated circuit technology, communication systems have higher and higher requirements for high-performance analog-to-digital converters (ADCs). The sample-and-hold (S / H) circuit at the front end of the ADC must meet high-speed, high-linearity, and high-precision requirements. Requirements, and the performance of the sampling switch usually determines the accuracy of the signal received by the S / H circuit. High-linearity and high-speed sampling switches can effectively reduce the impact of nonlinear factors such as charge injection and clock feedthrough on the sampling input, thereby improving sampling accuracy. [0003] Gate voltage bootstrap switch circuit such as figure 1 , figure 2 As shown, they respectively include a capacitor and a switch group. i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12
Inventor 朱樟明于光文
Owner 昆山启达微电子有限公司
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