Title:
COMPARATOR CIRCUIT HAVING PRE-CHARGING AND EARLY RESET OUTPUT STAGE
Document Type and Number:
WIPO Patent Application WO/2022/057513
Kind Code:
A1
Abstract:
Disclosed is a comparator circuit having a pre-charging and early reset output stage, the comparator circuit comprising: a first pre-charging transistor and a second pre-charging transistor. A gate of the first pre-charging transistor is connected to a pre-charging signal, and a gate of the second pre-charging transistor is connected to a master clock signal, wherein the pre-charging signal is enabled earlier than the master clock signal. At a pre-charging phase, there is a small electric current, and a comparator slowly amplifies an input small signal to reduce noise; and the electric current is increased after a certain time delay, such that on the basis of pre-charging, the comparator rapidly completes a pre-amplification phase and then enters a regeneration phase. The regeneration phase can be completed rapidly due to the increased electric current. As a result of certain signal amplification during a pre-charging time, equivalent input noise in a subsequent phase is reduced. By means of the present invention, a high speed, low power consumption and low noise can all be realized. In the present invention, an early reset output stage is fed forward, and hysteresis decreases to the range of indexes without increasing a reset time and increasing internal capacitance too much.
Inventors:
CAI MINQING (CN)
YAO YUFENG (CN)
GE YUNLONG (CN)
WANG HAONAN (CN)
LEE SEUNG CHUL (CN)
ZHONG YINGQUAN (CN)
YAO YUFENG (CN)
GE YUNLONG (CN)
WANG HAONAN (CN)
LEE SEUNG CHUL (CN)
ZHONG YINGQUAN (CN)
Application Number:
PCT/CN2021/111549
Publication Date:
March 24, 2022
Filing Date:
August 09, 2021
Export Citation:
Assignee:
HANGZHOU JOYWELL SEMICONDUCTOR CO LTD (CN)
International Classes:
H03M1/08; H03M1/00; H03M1/34
Foreign References:
| CN111092612A | 2020-05-01 | |||
| CN105763192A | 2016-07-13 | |||
| CN107888171A | 2018-04-06 | |||
| CN105680834A | 2016-06-15 | |||
| CN104113292A | 2014-10-22 | |||
| US20140132437A1 | 2014-05-15 |
Attorney, Agent or Firm:
XU & PARTNERS, LLC. (CN)
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