Novel fourteen-bit assembly line-successive approximation type analog-to-digital converter

Abstract

The invention relates to a novel fourteen-bit assembly line-successive approximation type analog-to-digital converter, which comprises a first-stage assembly line, a second-stage assembly line, a third-stage assembly line, a fourth-stage assembly line and digital error correction logic, wherein the first-stage assembly line, the second-stage assembly line and the third-stage assembly line are of afive-bit successive approximation type analog-to-digital converter structure, and one of the five bits is a redundant bit; the fourth-stage assembly line is a two-bit successive approximation type analog-to-digital converter; and an input signal passes through the first-stage assembly line, the second-stage assembly line, the third-stage assembly line and the fourth-stage assembly line to obtaina converted digital code, and the converted digital code is input into the digital error correction logic for processing to obtain a fourteen-bit digital code. The converter has the advantages of highconversion rate and low power consumption.

Description

【Technical field】 [0001] The invention relates to the technical field of electronic circuits, in particular to a novel 14-bit pipeline-successive approximation analog-to-digital converter. 【Background technique】 [0002] Successive approximation analog-to-digital converter, SAR is the abbreviation of successive approximation register in English. In each conversion process, by traversing all quantized values ​​and converting them into analog values, the input signal is compared with it one by one, and finally the output signal is obtained. Digital signal. SAR-ADC converter is composed of: sample and hold circuit, DAC, comparator, successive approximation register, timing and other control circuits, the core is DAC and comparator. [0003] With the continuous development of CMOS process technology, pipelined analog-to-digital converter (Pipeline ADC) has been widely used in the fields of Internet of Things, image sensing and wireless communication. A traditional pipelined an...

AI Technical Summary

Problems solved by technology

Although using successive approximation analog-to-digital converter (SAR ADC) instead of flash analog-to-digital converter (Flash ADC) can reduce the power consumption of each pipeline, it has a large limitation in conversion rate.

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