Ronald M Larson

US Patent:

6529505, Mar 4, 2003

Filed:

Jul 14, 1998

Appl. No.:

09/115149

Inventors:

William Robert Davis - Woodridge IL
Jason T. Kuo - Naperville IL
Ronald Frank Larson - Naperville IL
Albert Joseph Sawyer - Wheaton IL
Kenneth Wayne Shelhamer - Naperville IL
Larry Phillip Stoa - Warrenville IL
Robin Jeffrey Thompson - Batavia IL

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H04J 316

US Classification:

370389, 370465

Abstract:

A system for expanding a parameter encoding field in a new communications protocol that is compatible with an old protocol. An unused command parameter in an old protocol is used to indicate an expanded parameter encoding field in a new protocol. Parameter encodings from the old protocol are unchanged in the new protocol. A system communicating using the old protocol recognizes all parameters from the old protocol and ignores parameters from the new protocol. A system communicating using the new protocol recognizes parameters from both the old and new protocols.

US Patent:

7639746, Dec 29, 2009

Filed:

Jul 1, 2005

Appl. No.:

11/173109

Inventors:

William P. Cornelius - Los Gatos CA, US
Matthew K. Herndon - San Carlos CA, US
Ronald K. Larson - Mountain View CA, US

Assignee:

Apple Inc. - Cupertino CA

International Classification:

H04B 3/00
H04L 25/00

US Classification:

375257, 375222, 375220, 375219, 375258

Abstract:

A system that transmits signals through a communication channel. During operation, the system receives a sequence of bits for transmission through the communication channel. While transmitting a given bit, the system determines if the given bit has the same state as the previously transmitted bit. If so, the system uses a voltage-mode driver to drive a signal through the communication channel. Otherwise, the system uses a current source coupled to the voltage-mode driver to boost the drive-level of the voltage-mode driver. Note that the current source supplies a current to the communication channel without changing the impedance of the voltage-mode driver. In this way, the present invention compensates for frequency dependant losses in the communication channel without sacrificing impedance matching and without substantially increasing power consumption.

US Patent:

44255152, Jan 10, 1984

Filed:

Nov 16, 1981

Appl. No.:

6/321503

Inventors:

Ronald K. Larson - San Jose CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03K 333
H03K 512

US Classification:

307268

Abstract:

A method is provided which minimizes the risetime of a pulse modulated microwave signal propagated through a frequency multiplier circuit which has an input blocking capacitor. The circuit is conditioned by injecting a pulse which charges the blocking capacitor to its steady state value. When a subsequent pulse modulated microwave signal is sent through the frequency multiplier circuit, there is no delay in risetime associated with charging the blocking capacitor of the frequency multiplier circuit.

US Patent:

50288903, Jul 2, 1991

Filed:

May 2, 1990

Appl. No.:

7/517771

Inventors:

Ronald K. Larson - Los Altos Hills CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03C 106
H03C 114

US Classification:

332160

Abstract:

A microwave amplitude modulation system maintains constant amplitude attenuation at very high modulation rates over a broad range of microwave frequencies in response to voltage driving signals derived from modulation signals. In the system, the video input of a shunt-type PIN diode microwave amplitude modulation system is driven by a logarithmic voltage amplifier circuit which receives the modulation signals as an input.

US Patent:

49965000, Feb 26, 1991

Filed:

Oct 24, 1989

Appl. No.:

7/426637

Inventors:

Ronald K. Larson - Mountain View CA
John L. Imperato - Palo Alto CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03G 330

US Classification:

330279

Abstract:

An automatic power control system compensates for temperature variable components in a broadband signal generator by providing a reference signal generating circuit that is temperature matched with an automatic level control feedback circuit. The temperature matched components are either monolithic or placed in substantial thermal contact with one another. The signals from the matched signal paths are input to a summing circuit such that the effect of any temperature variation in one path is exactly offset by the corresponding temperature variation in the other path.