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:
Jul. 03, 2001
Filed:
Jun. 13, 2000
Stepan Iliasevitch, Nepean, CA;
Nortel Networks Limited, Montreal, CA;
Abstract
A signal level shifting circuit comprises an emitter-follower transistor with a base supplied with an input signal, a collector coupled to a supply voltage, and an emitter coupled via a level shifter to a bias circuit, whereby a level shifted signal is produced at a junction point between the level shifter and the bias circuit. The level shifter comprises one or more diodes to provide a forward voltage drop providing a signal level shift, a PMOS transistor switch in parallel with the diode(s), and a control circuit responsive to the supply voltage for controlling the switch to bypass the diode(s), thereby providing a smaller level shift, when the supply voltage has a lower one of two possible values. The circuit can have a differential input and a differential output stage, and cascode-connected transistors for reducing voltages so that the circuit can be implemented using BCMOS technology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile