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Comparator

A technology of comparators and amplifiers, applied in the field of comparators, can solve problems such as inability to complete design indicators, and achieve the effect of optimizing performance

Pending Publication Date: 2019-03-29
SHANGHAI HUALI INTEGRATED CIRCUTE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional solutions have limitations in high-speed requirements, and basically cannot complete the design indicators

Method used

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  • Comparator

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Embodiment Construction

[0031] The present invention provides a comparator, including a preamplifier and a dynamic latch, the dynamic latch only generates power consumption when latching, and the voltage at the first connection terminal of the dynamic latch is equal to the power supply when performing latching Voltage.

[0032] The preamplifier includes first to seventh MOSs M1 to M7; the second connection end of the first MOS M0 is connected to the external current IBIAS, the third connection end of the first MOS M0 and the third connection end of the second MOS M1, and the first MOS The first connection end of M0 and the first connection end of the second MOS M1 are connected to GND33, the second connection end of the second MOS M1 is connected to the first connection end of the third MOS M2 and the first connection end of the fourth MOS M3, and the first connection end of the third MOS M2 The second connection terminal is connected to the second connection terminal of the fifth MOS M4, the third c...

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Abstract

The invention provides a comparator, comprising a preamplifier and a dynamic latch, wherein the dynamic latch generates power consumption only when latching, and the voltage of a first connecting terminal of the dynamic latch is equal to the power supply voltage when latching. The comparator reduces the kickback effect by adding a circuit with isolated output and input to optimize the performanceof the comparator. The circuit provided by the invention adopts a current comparison form, and isolates the output end and the input end by adding two pairs of current mirrors. The comparator providedby the invention sacrifices the static power consumption at the amplifier to fix the current, and controls the mismatch error between the input pair tubes, thereby reducing the influence of the current deviation on the mismatch.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a comparator in a CMOS integrated circuit. Background technique [0002] For the design of high-resolution comparators in the prior art, it is difficult for single-stage latches to meet the increasing requirements of integrated circuit design. The traditional solution is to use signal cascade amplification, remove the mismatch voltage and then enter the latch for comparison. Traditional solutions have limitations in high-speed requirements, and basically fail to meet design targets. To improve the traditional solution, the comparator with preamplifier and latch structure is widely used, and its speed and accuracy can meet the requirements through reasonable design. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a device that can improve the minimum resolvable voltage and comparison speed, reduce the mismatch volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/0233
CPCH03K3/02335
Inventor 张宁邱雯婷
Owner SHANGHAI HUALI INTEGRATED CIRCUTE MFG CO LTD