The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2020
Filed:
Jun. 20, 2019
Wuxi Chipown Microelectronics Co., Ltd., Jiangsu, CN;
Wuxi Chipown Microelectronics Co., Ltd., Wuxi, CN;
Abstract
Comparison circuit and delay cancellation method are provided. The circuit includes a control circuit, capacitors and a transconductance amplifier circuit, wherein the control unit is configured to receive an input signal and control the comparison circuit to be in different working stages; the capacitors are configured to store a DC offset voltage signal at an automatic zero calibration stage; store the input signal when the output signal is inverted at a measurement stage; and store an equivalent delay voltage signal at a delay sampling stage; the transconductance amplifier circuit is configured to store the DC offset voltage signal to the capacitors at the automatic zero calibration stage; compare voltage signals on positive and negative input terminals and generate an output signal at the measurement stage; and store the equivalent delay voltage signal to the capacitors at the delay sampling stage. An inherent delay of the comparison circuit may be cancelled.