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:
Jan. 01, 1985
Filed:
Mar. 16, 1982
Douglas D Smith, Provo, UT (US);
Signetics Corporation, Sunnyvale, CA (US);
Abstract
A bipolar voltage translator contains a pair of differentially coupled transistors (Q1 and Q2) for converting an input voltage (V.sub.IN) supplied to one (Q1) of the pair into an output voltage (V.sub.OUT) taken between the other (Q2) and a first resistor (R9). A further transistor (Q4) coupled through a second resistor (R12) to a V.sub.EE supply provides current for the differential pair. A voltage reference circuit (10) containing at least three serially coupled diodes (S5, J3, and J4) with a resistive voltage divider (R13 and R14) across an intermediate one (J3) of the diodes provides the current-source transistor with a reference voltage (V.sub.REF2) that equals V.sub.EE +(1+.alpha.)V.sub.BE where .alpha. is 0.2-3.0. The ratio of the first resistor to the second is desirably .beta./.alpha. where .beta.is the output voltage swing divided by V.sub.BE. If .beta. is 1 and the transistors are NPN devices, the output voltage level is suitable for current tree logic.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile