John C Weld

59258276, Jul 20, 1999

Sep 25, 1997

8/938619

Ashraf W. Lotfi - Rowlett TX
John D. Weld - Succasunna NJ

Lucent Technologies Inc. - Murray Hill NJ

G01B 716

73799

A system for, and method of, empirically determining stress in a molded package and a power module embodying the system or the method. In one embodiment, the system includes: (1) a sensor, having a magnetic core exhibiting a known complex permeability in a control environment, that is embedded within the molded package and therefore subject to the stress and (2) a measurement circuit, coupled to the sensor, that applies a drive signal to the sensor, measures a response signal received from the sensor and uses the drive signal and the response signal to determine a complex permeability under stress of the core. The magnitude of the stress can then be determined from the core's complex permeability under stress.

56594623, Aug 19, 1997

Apr 12, 1996

8/640583

Ashraf Wagih Lotfi - Rowlett TX
Robert Joseph Roessler - Rowlett TX
John David Weld - Succasunna NJ

Lucent Technologies Inc. - Murray Hill NJ

H02M 7521

363 21

A power magnetic device, a method of manufacture therefor and a power converter. The power magnetic device includes: (1) an isolation transformer having a primary winding and a secondary winding, (2) a switch coupled to the primary winding, (3) a rectifier coupled to the secondary winding and (4) an encapsulant substantially surrounding the isolation transformer, the switch and the rectifier to join the isolation transformer, the switch and the rectifier into an integrated package, the integrated package having: (a) a first power input coupled to a first end of the primary winding, (b) a second power input coupled to the switch, (c) first and second power outputs coupled to the rectifier circuit and (d) a control input coupled to the switch, the control input allowing the switch to be controlled to couple the primary winding to a source of electrical power, the power magnetic device thereby capable of employing the isolation transformer and the rectifier to convert electrical power into DC electrical power.

57875693, Aug 4, 1998

Feb 21, 1996

8/604637

Ashraf Wagih Lotfi - Rowlett TX
John David Weld - Succasunna NJ
Karl Erich Wolf - Rockwall TX
William Lonzo Woods - Kaufman TX

Lucent Technologies Inc. - Murray Hill NJ

H01F 4102

296021

An encapsulated package for a power magnetic device and a method of manufacture therefor. The power magnetic device has a magnetic core subject to magnetostriction when placed under stress. The package includes: (1) compliant material disposed about at least a portion of the magnetic core and (2) an encapsulant substantially surrounding the compliant material and the magnetic core, the compliant material providing a medium for absorbing stress between the encapsulant and the magnetic core, the compliant material reducing the magnetostriction upon the magnetic core caused by the stress from the encapsulant. In one embodiment, the encapsulant includes a vent to an environment surrounding the package. The vent provides pressure relief for the compliant material, allowing the compliant material to substantially eliminate the magnetostrictive effects.

56422768, Jun 24, 1997

Feb 8, 1995

8/385495

Ashraf Wagih Lotfi - Rowlett TX
Lennart Daniel Pitzele - Rockwall TX
John David Weld - Succasunna NJ

Lucent Technologies Inc. - Murray Hill NJ

H02M 100

363144

An integral transformer/rectifier component includes a lead frame having terminals for connecting to conductors of a circuit substrate. A transformer primary and secondary winding is mounted on the lead frame and a rectifying diode is mounted on the same frame and is directly connected to a winding terminal end of the secondary winding, The transformer windings and diode are encapsulated in a thermoset plastic. A terminal end of the diode is extended beyond the encapsulation and used as an output terminal of the integral transformer/rectifier component.

59396415, Aug 17, 1999

Jul 31, 1998

9/127707

Ashraf W. Lotfi - Rowlett TX
John D. Weld - Succasunna NJ

Lucent Technologies Inc. - Murray Hill NJ

G01B 716

73768

A system for, and method of, empirically determining stress in a molded package and a power module embodying the system or the method. In one embodiment, the system includes: (1) a sensor, having a magnetic core exhibiting a known complex permeability in a control environment, that is embedded within the molded package and therefore subject to the stress and (2) a measurement circuit, coupled to the sensor, that applies a drive signal to the sensor, measures a response signal received from the sensor and uses the drive signal and the response signal to determine a complex permeability under stress of the core. The magnitude of the stress can then be determined from the core's complex permeability under stress.