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:
Nov. 24, 2020
Filed:
Aug. 29, 2019
Toshiba Memory Corporation, Tokyo, JP;
Kei Shiraishi, Kawasaki Kanagawa, JP;
Masaru Koyanagi, Ota Tokyo, JP;
Mikihiko Ito, Ota Tokyo, JP;
Yumi Takada, Yokohama Kanagawa, JP;
Yasuhiro Hirashima, Kawasaki Kanagawa, JP;
Satoshi Inoue, Zushi Kanagawa, JP;
Kensuke Yamamoto, Yokohama Kanagawa, JP;
Shouichi Ozaki, Komae Tokyo, JP;
Taichi Wakui, Kawasaki Kanagawa, JP;
Fumiya Watanabe, Chigasaki Kanagawa, JP;
TOSHIBA MEMORY CORPORATION, Tokyo, JP;
Abstract
A semiconductor memory device includes a differential waveform shaping circuit including first and waveform shaping circuits connected in parallel. The first waveform shaping circuit has a first inverting amplifier, and two inverters connected in series. The first inverting amplifier inverts and differentially amplifies an input signal having a rectangular waveform. Then, the output of the first inverting amplifier is passed through the two inverters. The second waveform shaping circuit has a first inverter, a second inverting amplifier, and a second inverter connected in series. The second inverting amplifier inverts and differentially amplifies the output signal from the first invertor, and the second inverter inverts the output signal from the second inverting amplifier. The differential waveform shaping circuit generates an output signal by averaging the output signal from the first waveform shaping circuit and the output signal from the second waveform shaping circuit.