Low-power-consumption 12-bit assembly line successive approximation analog-digital converter

Abstract

The invention discloses a low-power-consumption 12-bit assembly line successive approximation analog-digital converter which comprises a 6-bit sublevel successive approximation analog-digital converter, an operational amplifier, a 7-bit sublevel successive approximation analog-digital converter and a digital delay calibration unit. The residual signal output end of the 6-bit sublevel successive approximation analog-digital converter is connected with the input end of the operational amplifier, digital signals of the 6-bit sublevel successive approximation analog-digital converter are output to the high 6-bit input end of the digital delay calibration unit, the output end of the operational amplifier is connected with the input end of the 7-bit sublevel successive approximation analog-digital converter, and the digital signal output end of the 7-bit sublevel successive approximation analog-digital converter is connected with the low 6-bit input end of the digital delay calibration unit. The converter effectively achieves combination of assembly line analog-digital converters and successive approximation comparators, effectively improves comprehensive performance of the analog-digital converters, is low in power consumption compared with like analog-digital converters and has wide application prospects in the deep submicron process.

Description

technical field [0001] The invention relates to the technical field of analog-to-digital converters, in particular to a 12-bit pipelined successive approximation analog-to-digital converter with low power consumption. Background technique [0002] With the wide application of digital signal processing technology in the fields of high-resolution images, video processing, and wireless communication, the circuit system puts forward higher requirements for analog-to-digital converters. High-speed, high-precision, low-power ADCs have become the pursuit of the industry. Target. [0003] With the development of advanced manufacturing industry, semiconductor device technology has been developed to the deep sub-micron technology field, which brings many benefits to the signal processing circuit: lower power supply voltage, lower power consumption, higher processing speed, more High integration, smaller chip area, but higher requirements for analog circuit design, traditional circuit...

AI Technical Summary

Problems solved by technology

However, there are still problems in the design of the traditional pipelined successive approximation analog-to-digital converter: 1. The design of the sub-stage analog-to-digital converter of the traditional pipelined successive approximation analog-to-digital converter adopts the successive approximation converter with capacitive-resistive structure

In this way, the power consumption of the circuit cannot be effectively reduced, and it is difficult for the 128-fold amplifier to achieve high output accuracy

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