John T Herrmann

US Patent:

7162655, Jan 9, 2007

Filed:

Jul 16, 2003

Appl. No.:

10/620945

Inventors:

Brent A. McDonald - Round Rock TX, US
John A. Herrmann - Cedar Park TX, US
Daniel E. Jenkins - Bastrop TX, US

Assignee:

Dell Products, L.P. - Round Rock TX

International Classification:

G06F 1/26

US Classification:

713320, 713300, 713340

Abstract:

Power supply response to variations in power demand by a microprocessor is improved with a compensation loops that estimate changes in load current with improved speed. The load current estimate is performed in part with a capacitance feed forward compensation loop that senses voltage at output capacitors to replicate the current present in the capacitors and communicates the capacitor current adjusted by an optimized gain to the power supply for adjustment of power output. Capacitor current is replicated with a frequency domain filter having a pole that cancels out the zero created by power supply equivalent series resistance and capacitor capacitance. The capacitance compensation loop improves power supply response time to microprocessor power demand skews so that the size or number of output capacitors may be reduced while still maintaining power supply at the microprocessor to within desired voltage and current tolerances.

US Patent:

52474402, Sep 21, 1993

Filed:

May 3, 1991

Appl. No.:

7/695052

Inventors:

Zbynek A. Capurka - Palatine IL
John E. Herrmann - Mundelein IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

B60Q 104
G06F 1550

US Classification:

36442405

Abstract:

The present invention provides for automatic control of the performance of a transportation vehicle based on the vehicle's geographic location. This is accomplished by determining the geographic location of the vehicle by employing a navigation system (107) and comparing its location output to a predetermined performance control requirement then modifying the control of the vehicle as a result. Such control modification includes control of a vehicle's lights by a vehicle lights controller (109).

US Patent:

50417681, Aug 20, 1991

Filed:

Apr 12, 1989

Appl. No.:

7/336474

Inventors:

John E. Herrmann - Mundelein IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H02P 506
H02K 2908

US Classification:

318138

Abstract:

In a three phase full wave type brushless DC motor control system, the neutral (common) terminal (15) is connected to the positive terminal (14A) of a battery (14) with the negative battery terminal (14B) connected to ground comprising a reference terminal (27) for the control system. Pairs of upper and lower controllable switching drive devices (21A-22A, 23B-24B, 25C-26C) are utilized to control current in windings (13A-13C) of the motor (13). Diodes (29-34) are connected across each of the switching devices for handling inductive transient signals. An effective storage capacitor, preferably comprising individual storage capacitors (36-38) connected across each pair of switching devices, is used to store a boost voltage, above battery voltage, which is generated by inductive transient signals. This configuration not only returns inductive energy in the windings to the battery and/or other windings in the motor, but also substantially reduces radiated noise and conducted noise and therefore provides less battery voltage ripple.

US Patent:

44979002, Feb 5, 1985

Filed:

Mar 28, 1983

Appl. No.:

6/479413

Inventors:

Dinah Abram - Highland Park IL
Alan S. Armstrong - Waukegan IL
John E. Herrmann - Hawthorn Woods IL
Chung-Mei Ling - Chicago IL

Assignee:

Abbott Laboratories - North Chicago IL

International Classification:

G01N 3354
G01N 3356

US Classification:

436511

Abstract:

The present disclosure relates to a solid phase immunoassay for the detection of Neisseria gonorrhoeae antigens in a clinical specimen, wherein the Neisseria gonorrhoeae antigens to be determined are coated or adsorbed on the solid phase.