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:
Dec. 13, 1994
Filed:
Nov. 19, 1993
Rajsekhar Jayaraman, Rancho Palas Verdes, CA (US);
Anand Janaswamy, Ossining, NY (US);
Thor Wacyk, Briarcliff Manor, NY (US);
Philips Electronics North America Corporation, New York, NY (US);
Abstract
A half-bridge driver circuit including a lower drive module and a floating upper drive module for driving respective external upper and lower power transistors of a high voltage half bridge is contained in an integrated circuit chip which includes an on-chip bootstrap diode emulator for charging an external bootstrap capacitor that powers the upper drive module. The upper drive is accommodated in an insulated well and the diode emulator includes as its main current carrying element, a LDMOS transistor formed along the periphery of the well. The LDMOS transistor is driven into a conducting state at the same time the lower power transistor is driven into a conducting state.