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:
Oct. 19, 1982
Filed:
Feb. 11, 1980
Melvin L Marmet, Norco, CA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
A circuit for producing a signal of one type in the absence of a semiconductor at an addressed memory location and a signal of another type in the presence of the semiconductor includes a constant voltage reference source to supply a variable current to a pull up FET. The pull up FET is connected to be in series with the memory semiconductor when it is present in the circuit, and operates to supply a low level voltage to an output amplifier when the semiconductor is present and a high level voltage when the semiconductor is not present. The low level voltage is centered about the trigger point of the amplifier, so that the bit line swing from the memory semiconductor produces a full MOS output from the amplifier.