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. 29, 1982
Filed:
Jun. 09, 1980
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365194 ; 365233 ;
Abstract
A bipolar memory circuit is provided with a delay circuit which receives a write enabling signal, a gate circuit which detects the coincidence between an input signal and an output signal of the delay circuit, and a circuit which is started by an output signal of the gate circuit and which provides a pulse signal of a fixed time. The operation of a write driver circuit in the bipolar memory circuit is controlled by the pulse signal. Noise interfering in the write enabling signal are neglected by the use of the delay circuit and the gate circuit. The pulse width of the write enabling signal is permitted to be made smaller than the pulse width of the pulse signal required by the write driver circuit.