Analog-to-digital converter and electronic equipment

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...

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

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