Pipeline analog-to-digital converter

Abstract

The invention discloses a pipelined analog-to-digital converter. The pipelined analog-to-digital converter comprises a sub analog-to-digital converter, a multiplication digital-to-analog converter anda decoder, and the decoder provides a ground signal for the multiplication digital-to-analog converter. The sub-analog-to-digital converter is electrically connected with a ground pad through a firstmetal wire, and the decoder is electrically connected with the ground pad through a second metal wire.

Description

Technical field [0001] The present invention relates to a pipelined analog-to-digital converter (pipelined ADC, also known as pipeline ADC). Background technique [0002] figure 1 It is an existing pipelined analog-to-digital converter 100, which includes a plurality of serially connected arithmetic stages 110, a terminal analog-digital converter 120, and a digital correction circuit 130. Differential input signal V in After multiple stages of comparison, subtraction, and amplification, the output of each stage 110 and the output of the terminal analog-to-digital converter 120 are corrected by the correction circuit 130 to generate a digital code D, which is the differential input Signal V in The result after analog-digital conversion. The operation principle of the pipelined analog-to-digital converter 100 is well-known to those skilled in the art, so it will not be repeated here. [0003] figure 2 for figure 1 A functional block diagram of one of the operational stages 110 o...

AI Technical Summary

Problems solved by technology

However the above conditions limit the reference voltage V REF+ and reference voltage V REF- degrees of design freedom

Furthermore, image 3 The unit gain buffers (unit gain buffer) 310 and 320 in the

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