Richard Louis Baumgartner

US Patent:

6998850, Feb 14, 2006

Filed:

Oct 10, 2003

Appl. No.:

10/683194

Inventors:

Richard A. Baumgartner - Palo Alto CA, US

Assignee:

Agilent Technologies, Inc. - Palo Alto CA

International Classification:

G01R 31/08
G01R 22/00
G01R 19/00

US Classification:

324522, 324 7617, 702 64

Abstract:

In one embodiment, a circuit measures picoampere current levels. The circuit comprises: an operational-amplifier that has differential inputs and differential outputs; a switching structure that switchably couples an input line to one of the differential inputs in response signals from a timing circuit; a first integrating capacitor coupled to one of the differential inputs and to one of the differential outputs; a second integrating capacitor coupled to the other of the differential inputs; and a charge injection compensation structure that selectively injects charge into the input line and removes charge from the input line in response to signals from the timing circuit.

US Patent:

7808759, Oct 5, 2010

Filed:

Jun 21, 2007

Appl. No.:

11/766333

Inventors:

Richard A. Baumgartner - Palo Alto CA, US

Assignee:

Avago Technologies ECBU IP (Singapore) Pte. Ltd. - Singapore

International Classification:

H02H 9/08

US Classification:

361 939, 361111

Abstract:

In an opto-isolator, common mode pulses that occur are compensated for by either adding current to the electrical-to-optical converter (EOC) drive current to compensate for a decrease in the EOC drive current caused by the occurrence of a common mode pulse or by pulling some of the drive current away from the EOC to compensate for an increase in the EOC drive current caused by the occurrence of a common mode pulse.

US Patent:

7852645, Dec 14, 2010

Filed:

Dec 12, 2007

Appl. No.:

11/954498

Inventors:

Julie Fouquet - Portola Valley CA, US
Richard Lum - Singapore, SG
Richard Baumgartner - Palo Alto CA, US

Assignee:

Avago Technologies ECBU IP (Singapore) Pte. Ltd. - Singapore

International Classification:

H02M 7/04
H02J 3/14

US Classification:

363 81, 363 84, 323284, 307 39

Abstract:

A method and circuit is provided for reducing power consumption in a power transformer, typically incorporated into an electrical or electronic device such as a consumer device. In an embodiment, a detection/isolation circuit is coupled to an input of a power transformer/rectifier via a switching device. The switching device can be, for example, a solid state relay. The detection/isolation circuit is configured to sense the occurrence of no-load conditions in the power transformer and responsively disengage the power transformer from a coupled source of power (e. g. , wall outlet) via the coupled switching device.

US Patent:

7948067, May 24, 2011

Filed:

Jun 30, 2009

Appl. No.:

12/495733

Inventors:

Julie E. Fouquet - Portola Valley CA, US
Richard A. Baumgartner - Palo Alto CA, US
Gary Tay - De Royal, SG
Dominique Ho - Singapore, SG

Assignee:

Avago Technologies ECBU IP (Singapore) Pte. Ltd. - Singapore

International Classification:

H01L 23/495

US Classification:

257666, 257676, 257E23043, 257E23052

Abstract:

In an embodiment, the invention provides a coil transducer isolator package comprising at least one lead frame, at least two integrated circuits (ICs) and a flex circuit comprising at least a first coil transducer. The first coil transducer comprises at least one metal coil. The coil transducer isolator package is fabricated such that no portion of the lead frame is physically located within a spatial volume extending substantially perpendicular to the at least one metal coil. The boundaries of the spatial volume are defined by a periphery of the at least one metal coil. At least one of the two ICs is at least partially located within the spatial volume extending substantially perpendicular to the at least one metal coil.

US Patent:

8061017, Nov 22, 2011

Filed:

Feb 26, 2009

Appl. No.:

12/393596

Inventors:

Julie E. Fouquet - Portola Valley CA, US
Richard A Baumgartner - Palo Alto CA, US
Gary R. Trott - San Mateo CA, US

Assignee:

Avago Technologies ECBU IP (Singapore) Pte. Ltd. - Singapore

International Classification:

H01F 7/06

US Classification:

29606, 296021, 29605, 336 65, 336 83, 336200, 336206, 336208

Abstract:

Various embodiments of means and methods for reducing the pick-up of electromagnetic interference (“EMI”) by coil transducers are described and shown that are configured to provide high voltage isolation and high voltage breakdown performance characteristics in small packages. In some embodiments, the lengths, heights, and horizontal distances between wires electrically connecting transmitter circuits and receiver circuits to coil transducers are minimized and optimized respecting one another.

US Patent:

8116055, Feb 14, 2012

Filed:

Mar 8, 2010

Appl. No.:

12/719036

Inventors:

Richard A. Baumgartner - Palo Alto CA, US
Kwee Chong Chang - Singapore, SG

Assignee:

Avago Technologies ECBU IP (Singapore) Pte. Ltd. - Singapore

International Classification:

H02H 9/08

US Classification:

361 939, 361111

Abstract:

In an opto-isolator, a common mode pulse compensation circuit is provided that senses when a common mode pulse event occurs and that adds current to the LED drive current to compensate for a decrease in the LED drive current caused by the occurrence of the event. The common mode pulse compensation circuit is capable of operating effectively over a very wide range of common mode pulse slopes by automatically adjusting the amount of current that is added to the LED drive current based at least in part on the slope of the sensed common mode pulse. In addition, the common mode pulse compensation circuit is capable of being implemented with LEDs that operate at very low drive currents, which allows the power consumption requirements of the opto-isolator to be reduced.

US Patent:

8385043, Feb 26, 2013

Filed:

Jun 2, 2009

Appl. No.:

12/477078

Inventors:

Gek Yong Ng - Singapore, SG
Richard A. Baumgartner - Palo Alto CA, US
Julie E. Fouquet - Portola Valley CA, US

Assignee:

Avago Technologies ECBU IP (Singapoare) Pte. Ltd. - Singapore

International Classification:

H01H 9/00

US Classification:

361268

Abstract:

Galvanic isolators are disclosed herein. An embodiment of a galvanic isolator comprises a generally planar electrically insulating substrate comprising opposing first and second surfaces, the substrate comprising an electrically insulating, low dielectric loss material and having a transmitter coil disposed on the first surface and a receiving coil disposed on the second surface. A transmitter circuit is operably connected to the transmitter coil. The transmitter circuit comprises a first detector that detects a rising edge of an input signal; a first pulse generator that generates a plurality of first pulses upon detection of the rising edge; a second detector that detects a falling edge of the input signal; and a second pulse generator that generates a plurality of second pulses upon detection of the falling edge. A receiver circuit is operably connected to the second receiving coil. The receiver circuit generates a signal that is substantially similar to the input signal based on the first pulses and the second pulses.

US Patent:

8436709, May 7, 2013

Filed:

Jan 4, 2011

Appl. No.:

12/984565

Inventors:

Julie E. Fouquet - Portola Valley CA, US
Gek Yong Ng - Singapore, SG
Richard Baumgartner - Palo Alto CA, US
Gary R. Trott - San Mateo CA, US

Assignee:

Avago Technologies General IP (Singapore) Pte. Ltd. - Singapore

International Classification:

H01F 5/00

US Classification:

336200

Abstract:

Disclosed herein are various embodiments of coil transducers and galvanic isolators configured to provide high voltage isolation and high voltage breakdown performance characteristics in small packages. A coil transducer is provided across which data or power signals may be transmitted and received by primary and secondary coils disposed on opposing sides thereof without high voltage breakdowns occurring therebetween. At least portions of the coil transducer are formed of an electrically insulating, non-metallic, non-semiconductor, low dielectric loss material. Circuits are disclosed herein that permit high speed data signals to be transmitted through the coil transducer and faithfully and accurately reconstructed on the opposing side thereof. The coil transducer may be formed in a small package using, by way of example, printed circuit board, CMOS and other fabrication and packaging processes.