Michael N Walters

US Patent:

RE38487, Apr 6, 2004

Filed:

Jan 11, 2002

Appl. No.:

10/044506

Inventors:

Robert H. Isham - Flemington NJ
Charles E. Hawkes - Cary NC
Michael M. Walters - Apex NC

Assignee:

Intersil Communications, Inc. - Wilmington DE

International Classification:

G05F 1613

US Classification:

323224, 323283, 323288

Abstract:

A DC to DC buck pulse width modulator converter circuit includes an input, a high side output and a low side output. A high side switch is electrically connected between a common output node and a voltage supply, and controls a flow of current therethrough dependent upon the high side output. A low side switch is electrically connected between the common output node and ground, and controls a flow of current therethrough dependent upon the low side output. A virtual ground amplifier includes a second input electrically connected to ground. A current feedback resistor is electrically connected intermediate the common output node and a first input of the virtual ground amplifier. A variable impedance component is electrically connected to an output of the virtual ground amplifier and to the first input of the virtual ground amplifier. The impedance of the variable impedance component is varied dependent upon the output of the virtual ground amplifier. A sample and hold circuit is electrically connected intermediate the input of the pulse width modulator converter circuit and the variable impedance component.

US Patent:

RE38940, Jan 24, 2006

Filed:

Oct 29, 2002

Appl. No.:

10/282753

Inventors:

Robert H. Isham - Flemington NJ, US
Charles E. Hawkes - Cary NC, US
Michael M. Walters - Apex NC, US

Assignee:

Intersil Communications, Inc. - Palm Bay FL

International Classification:

G05F 1/613

US Classification:

323224, 323283, 323288

Abstract:

A DC to DC buck pulse width modulator converter circuit includes an input, a high side output and a low side output. A high side switch is electrically connected between a common output node and a voltage supply, and controls a flow of current therethrough dependent upon the high side output. A low side switch is electrically connected between the common output node and ground, and controls a flow of current therethrough dependent upon the low side output. A virtual ground amplifier includes a second input electrically connected to ground. A current feedback resistor is electrically connected intermediate the common output node and a first input of the virtual ground amplifier. A variable impedance component is electrically connected to an output of the virtual ground amplifier and to the first input of the virtual ground amplifier. The impedance of the variable impedance component is varied dependent upon the output of the virtual ground amplifier. A sample and hold circuit is electrically connected intermediate the input of the pulse width modulator converter circuit and the variable impedance component.

US Patent:

RE42532, Jul 12, 2011

Filed:

Jan 23, 2006

Appl. No.:

11/337925

Inventors:

Robert H. Isham - Flemington NJ, US
Charles E. Hawkes - Cary NC, US
Michael M. Walters - Apex NC, US

Assignee:

Intersil Americas Inc. - Milpitas CA

International Classification:

G05F 1/575
G05F 1/618

US Classification:

323284, 323224, 323285, 323288, 323283

Abstract:

A DC to DC buck pulse width modulator converter circuit includes an input, a high side output and a low side output. A high side switch is electrically connected between a common output node and a voltage supply, and controls a flow of current therethrough dependent upon the high side output. A low side switch is electrically connected between the common output node and ground, and controls a flow of current therethrough dependent upon the low side output. A virtual ground amplifier includes a second input electrically connected to ground. A current feedback resistor is electrically connected intermediate the common output node and a first input of the virtual ground amplifier. A variable impedance component is electrically connected to an output of the virtual ground amplifier and to the first input of the virtual ground amplifier. The impedance of the variable impedance component is varied dependent upon the output of the virtual ground amplifier. A sample and hold circuit is electrically connected intermediate the input of the pulse width modulator converter circuit and the variable impedance component.

US Patent:

62462202, Jun 12, 2001

Filed:

Aug 7, 2000

Appl. No.:

9/633316

Inventors:

Robert H. Isham - Flemington NJ
Charles E. Hawkes - Cary NC
Michael M. Walters - Apex NC

Assignee:

Intersil Corporation - Palm Bay FL

International Classification:

G05F 1613

US Classification:

323224

Abstract:

A DC to DC buck pulse width modulator converter circuit includes an input, a high side output and a low side output. A high side switch is electrically connected between a common output node and a voltage supply, and controls a flow of current therethrough dependent upon the high side output. A low side switch is electrically connected between the common output node and ground, and controls a flow of current therethrough dependent upon the low side output. A virtual ground amplifier includes a second input electrically connected to ground. A current feedback resistor is electrically connected intermediate the common output node and a first input of the virtual ground amplifier. A variable impedance component is electrically connected to an output of the virtual ground amplifier and to the first input of the virtual ground amplifier. The impedance of the variable impedance component is varied dependent upon the output of the virtual ground amplifier. A sample and hold circuit is electrically connected intermediate the input of the pulse width modulator converter circuit and the variable impedance component.

US Patent:

20160015027, Jan 21, 2016

Filed:

Mar 11, 2014

Appl. No.:

14/773423

Inventors:

- Amersfoort, NL
Qiwei He - Belle Mead NJ, US
Shawn Zhu - Stormville NY, US
Logan Dempsey - Princeton NJ, US
Michael Walters - Rhinebeck NY, US
Peter Westbye - Stenungsund, SE

Assignee:

AKZO NOBEL CHEMICALS INTERNATIONAL B.V. - Amersfoort

International Classification:

A01N 25/24
A01N 39/04
A01N 25/02
A01N 57/20

Abstract:

The present invention is directed to an agricultural composition comprising at least one agricultural chemical and at least one cellulose ether, wherein the cellulose ether is a nonionic methylethylhydroxyethyl cellulose (MEHEC) polymer. The present invention is also directed to a method for reducing spray drift during the spraying of an aqueous solution. The method comprises: providing a nonionic MEHEC polymer; combining the MEHEC polymer with at least one agricultural chemical to obtain the aqueous solution; and spraying the aqueous solution. Further, the present invention is also directed to a method for increasing resistance to rain wash off of an aqueous solution sprayed onto a surface. The method comprises: providing a nonionic MEHEC polymer; combining the MEHEC polymer with at least one agricultural chemical to obtain the aqueous solution; and spraying the aqueous solution onto the surface.