Patent · US Active

Current driver circuit

US8093925B2 · kind B2 · utility

0Cited by

3References

7Claims

0Family size

Assignee

TEXAS INSTRUMENTS DEUTSCHLAND GMBH · DE

Inventors

Sri Navaneethakrishnan Easwaran · Freising, DE
Michael Wendt · Günzburg, DE

Key dates

Filing date	Aug 12, 2009
Grant date	Jan 10, 2012
Priority date	—
Expiry date	Aug 22, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60R21/017
WIPO fieldControl
WIPO sectorInstruments

Abstract

An integrated regulated current drive circuit for driving a squib of an inflatable airbag has a current sense resistor connected in series with a load, and a reference resistor connected in series with a reference current source. Both resistors are matched to define a precise ratio of resistance values which determines the amount of current fed to the squib. Both resistors are implemented by combining a number of identical on-chip resistor elements.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.