Folding device and folding and interpolating A/D converter

Abstract

The invention discloses a folding device, and a folding and interpolating A / D converter. The folding device comprises a folding amplifying circuit and an output load circuit, wherein the folding amplifying circuit comprises odd-numbered folding blocks including N-type MOS (Metal Oxide Semiconductor) transistor folding blocks and P-type MOS transistor folding blocks, which are connected with one another in a staggered manner; the first output terminals of the N-type MOS transistor folding blocks are mutually connected; the second output terminals of the N-type MOS transistor folding blocks arealso mutually connected; both output terminals of each P-type MOS transistor folding block are connected with two neighboring N-type MOS transistor folding blocks. According to the invention, the folding device has greatly lowered power consumption and greatly reduced parasitic capacitance at the output nodes, thereby facilitating the improvement on the speed and the dynamic performance of the folding device.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a folder and a folding interpolation analog / digital converter. Background technique [0002] At present, high-speed analog-to-digital converters are widely used in fields such as wireless communication systems, digital TVs, liquid crystal display drive circuits, and hard disk drive circuits. These fields not only require high-speed analog-to-digital converters, but also have low power consumption and small area. advantage. The flash analog-to-digital converter adopts a fully parallel structure and is one of the fastest types of analog-to-digital converters. However, as the resolution increases, the comparators it uses increase exponentially, resulting in excessive power consumption. The resolution and application of the flash analog-to-digital converter are limited. The folded interpolation analog-to-digital converter greatly reduces the number of comparators by usi...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a folder and a folded interpolation type analog / digital converter. Based on the folder, it can overcome the problems caused by the excessive power consumption of the folder in the prior art and the excessive parasitic gate-to-drain capacitance. The problem of speed and dynamic high-frequency performance degradation

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