Low-power-consumption high-speed comparator

Abstract

The invention discloses a low-power-consumption high-speed comparator which comprises four PMOS tubes, four NMOS tubes, two first buffers, two OR gates, a first analog signal input end, a second signal input end, a first comparison result output end, a second comparison result output end and a clock control end. When the clock control end qamp is at a high level, the comparator is in a reset state. When the clock control end qamp jumps from a high level to a low level, the comparator is in a comparison state. After the comparator completes comparison, the comparator enters a latch state, and an output result is kept unchanged. According to the low-power-consumption high-speed comparator, small input mismatch voltage can be obtained by increasing the size of an input tube; the low-power-consumption high-speed comparator fully utilizes the property of high characteristic frequency of the NMOS tubes, increases the conversion speed of the comparator, has simple circuit structure and is suitable to be used in a high-speed conversion circuit.

Description

technical field [0001] The invention relates to the technical field of semiconductor integrated circuits, in particular to a high-speed comparator with low power consumption. Background technique [0002] Clocked comparators are commonly used in analog-to-digital converters. Analog-to-digital converters are operating faster and faster, requiring comparator circuits with faster conversion rates. Conventional comparator circuits generally have a pre-amplification circuit. Although the input mismatch voltage of the comparator can be reduced, it also reduces the maximum operating speed of the comparator and increases the power consumption of the circuit. Contents of the invention [0003] In order to overcome the problems in the prior art, the purpose of the present invention is to provide a low-power high-speed comparator circuit, which can realize high-speed conversion rate with less power consumption. [0004] In order to achieve the above object, the technical scheme ad...

AI Technical Summary

Problems solved by technology

Although the input mismatch voltage of the comparator can be reduced, it also reduces the maximum operating speed of the comparator and increases the power consumption of the circuit

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