Daniel S Draper

US Patent:

7127391, Oct 24, 2006

Filed:

Nov 20, 2003

Appl. No.:

10/720000

Inventors:

Charles E. Chang - Thousand Oaks CA, US
Daniel Scott Draper - Portland OR, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

G10L 21/00

US Classification:

704230, 375316

Abstract:

A method and apparatus is disclosed for reducing the error rate in a received signal by determining and establishing an optimal slice point for a decision device, or optimal operational parameters. In one embodiment, a processor monitors a received signal to determine signal characteristics, such as a peak signal level or phase value. A table look-up operation may occur in a data table or other processing may occur and, based on the signal characteristics, an optimal slice point may be determined. In one embodiment the look-up operation may also reveal one or more optimal operational parameters that, if adopted, will further reduce the error rate. A receiving station may communicate these optimal operational parameters to a transmitting station to modify operation of the transmitting station. Also disclosed is a method and apparatus for self-testing a communication system and channel to determine optimal slice points and operational parameters.

US Patent:

7265334, Sep 4, 2007

Filed:

Oct 5, 2005

Appl. No.:

11/244484

Inventors:

Daniel Draper - Portland OR, US
Maurice M. Reintjes - Beaverton OR, US
Gilberto I. Sada - Irvine CA, US
Keith R. Jones - Irvine CA, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

H01J 40/14

US Classification:

250214R, 250214 C

Abstract:

A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a target value from memory may be utilized to control one or more power levels of an optic signal. There may comprise 2 or more different power levels for the optic signal. During operation, target values may continue to be utilized or an open loop or closed loop control system may be utilized. Compensation may occur for both additive noise/distortion and multiplicative noise/distortion. The compensation for one power level may be expanded or extrapolated to compensate for additive noise/distortion and multiplicative noise/distortion that affect other power levels.

US Patent:

7276682, Oct 2, 2007

Filed:

Nov 19, 2004

Appl. No.:

10/993561

Inventors:

Daniel Draper - Portland OR, US
Gilberto I. Sada - Irvine CA, US
Maurice M. Reintjes - Beaverton OR, US
Keith R. Jones - Irvine CA, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

G01J 1/32

US Classification:

250205, 250214 R, 250214 C, 372 3802

Abstract:

A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator or driver. During operation, pre-stored values may continue to be utilized or an open loop or closed loop control system may be utilized. An open loop control system may incorporate a temperature module or a timer module to account for changes in environment or changes due to aging that may undesirably affect system operation. A closed loop control system may incorporate one or more feedback loops that generate a compensation value to account for detected changes. In one configuration one or more peak values of the actual optic signal, or a portion thereof, are detected and processed to generate the compensation signal.

US Patent:

7381935, Jun 3, 2008

Filed:

Nov 19, 2004

Appl. No.:

10/993525

Inventors:

Gilberto I. Sada - Irvine CA, US
Maurice M. Reintjes - Beaverton OR, US
Keith R. Jones - Irvine CA, US
Daniel Draper - Portland OR, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

G01J 1/32

US Classification:

250205, 250214 R

Abstract:

A method and apparatus is disclosed for optic signal power control to maintain a desired or optimum optic signal power level. During start-up, a default or target value from memory may be utilized to bias or otherwise control operation of an optic signal generator or driver. During operation, pre-stored values may continue to be utilized or an open loop or closed loop control system may be utilized. An open loop control system may incorporate a temperature module or a timer module to account for changes in environment or changes due to aging that may undesirably affect system operation. A closed loop control system may incorporate one or more feedback loops that generate a compensation value to account for detected changes. In one configuration one or more peak values of the actual optic signal, or a portion thereof, are detected and processed to generate the compensation signal.

US Patent:

7499648, Mar 3, 2009

Filed:

Sep 27, 2004

Appl. No.:

10/952488

Inventors:

Daniel S. Draper - Portland OR, US
Charles E. Chang - Coto DeCaza CA, US
Wim F. Cops - Newport Beach CA, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

H04B 10/16

US Classification:

398 37, 398177

Abstract:

A method and apparatus for signal amplification and decision device operation on a signal which has a magnitude, peak value, or other average power that varies over time. In general, a peak detector detects the peak value of a received signal and responsive to the peak value, selectively enables a decision device when the signal is amplified to increase decision device accuracy. The decision may occur before the amplification forces the signal into saturation. Multi-stage amplification in combination with controlled switching or multiplexing may be utilized to selectively amplify the signal and selectively initiate decision device operation. The peak detector value may also control signal amplification levels in a multi-stage amplifier. Responsive to the peak value, a switch, which receives as its input the output from one or more amplifier stages, may be controlled to output the signal after a desired amount of amplification.

US Patent:

7504610, Mar 17, 2009

Filed:

Jul 5, 2007

Appl. No.:

11/825463

Inventors:

Daniel S. Draper - Portland OR, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

G01J 1/32

US Classification:

250205, 250214 R

Abstract:

The power control system utilizing a normal average power control loop to control average power and modulation level of an optic signal generated by an optic signal generator. The target average power is adjusted by a small percentage, and the corresponding change in bias current needed to adjust the average power level is monitored. The change in average power divided by the change in bias current is a measure of the optic signal generator's slope efficiency. Modulation current is adjusted up or down based on the change in slope efficiency compared to the slope efficiency stored at the time of module calibration. By adjusting the modulation current, the desired optic signal output from the transmitter may be maintained.

US Patent:

7525346, Apr 28, 2009

Filed:

Jul 11, 2002

Appl. No.:

10/193834

Inventors:

Michael P. Khaw - Portland OR, US
Daniel S. Draper - Portland OR, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

H03F 3/45

US Classification:

327 52, 327 54, 330252, 330257

Abstract:

In one system embodiment, the system is characterized by: a differential amplifier including but not limited to at least one amplifying transistor having an emitter coupled directly to a ground. In one embodiment of a method of making a system, the method is characterized by: operably coupling at least one amplifying transistor of a differential amplifier directly to a ground. In one embodiment of a method of driving a system, the method is characterized by: driving at least one amplifying transistor of a differential amplifier with an emitter-follower feedback loop. In one system embodiment, the system is characterized by: a differential amplifier including but not limited to a first amplifying transistor having a base operably coupled with a first emitter-follower feedback loop.

US Patent:

7551852, Jun 23, 2009

Filed:

Jul 15, 2005

Appl. No.:

11/182423

Inventors:

Maurice M. Reintjes - Beaverton OR, US
Daniel Draper - Portland OR, US
Gilberto I. Sada - Irvine CA, US

Assignee:

Mindspeed Technologies, Inc. - Newport Beach CA

International Classification:

H04B 10/08
H04B 10/00
H04B 10/02

US Classification:

398 33, 398 30, 398 31, 398107, 3981675, 398177

Abstract:

A method and apparatus configured to transmit module data between optic modules over a primary communication channel, such as an optic fiber configured to carry network data or outgoing data. A control center may send the module data, such as any type of DDMI data, over the optic fiber to control one or more aspects of the optic module system. The optic module may also be configured to send module data regarding any aspect of module status or operation, to a control center, via the optic fiber. Use of the primary communication channel, normally reserved for only network data, allow for module to module communication or module to control center communication without need of cumbersome two wire interface or supplement channels. Optic module data communication may occur concurrent with network data transmission. Optic module data back-up may occur via the optic channel to provide rapid re-load of important optic module data.