Robert L Macomber

US Patent:

7519789, Apr 14, 2009

Filed:

Jan 20, 2005

Appl. No.:

11/039366

Inventors:

Robert L. Macomber - Portland ME, US
David J. Fensore - New Gloucester ME, US

Assignee:

National Semiconductor Corporation - Santa Clara CA

International Classification:

G06F 1/26
H03K 5/19
G11C 7/00

US Classification:

711167, 327 24, 365221

Abstract:

A method for dynamically selecting a clock edge for recovering read data received from a slave at a master is provided that includes determining whether an internal clock signal is high when a first bit of read data is received at the master. One of a falling edge and a rising edge of the internal clock signal are selected for recovering the read data based on the determination of whether the internal clock signal is high when the first bit of read data is received at the master.

US Patent:

7643593, Jan 5, 2010

Filed:

Oct 14, 2005

Appl. No.:

11/250591

Inventors:

Robert L. Macomber - Portland ME, US

Assignee:

National Semiconductor Corporation - Santa Clara CA

International Classification:

H04B 1/16
H04L 7/00

US Classification:

375355, 455255, 455259, 455208

Abstract:

A method for recovering data includes generating a plurality of out-of-phase clock signals. The method also includes generating samples of an incoming data signal, where a plurality of samples are generated using each of the plurality of clock signals. The method further includes selecting one of the plurality of clock signals and providing the samples generated using the selected clock signal. The incoming data signal may be received over a serial interface that includes a clock line for transporting a main clock signal. The out-of-phase clock signals could be approximately 0, 90, 180, and 270 out-of-phase with respect to the main clock signal. The out-of-phase clock signals could be used to clock different registers that sample the incoming data signal. The selected clock signal could be selected by identifying a transition that occurs between samples associated with two of the clock signals and then selecting another of the clock signals.

US Patent:

59130717, Jun 15, 1999

Filed:

Jul 26, 1993

Appl. No.:

8/097438

Inventors:

Robert Macomber - Portland ME

Assignee:

National Semiconductor Corporation - Santa Clara CA

International Classification:

G06F 1300

US Classification:

3958004

Abstract:

A peripheral device and a host device implement a scalar interrupt-acknowledgement system. The peripheral device detects events and increments an unprocessed counter in response to each detected event. The host device processes the events and increments a processed counter in response to each processed event. After a number of events have been processed, the host device transmits the value held by the processed counter to the peripheral device. In response, the peripheral device subtracts the value of the processed counter from the value of the unprocessed counter. The peripheral device asserts an interrupt when events remain to be processed and deasserts the interrupt when all the events have been processed.

US Patent:

51542730, Oct 13, 1992

Filed:

Nov 26, 1991

Appl. No.:

7/798536

Inventors:

Robert A. Macomber - Agoura CA

Assignee:

Socio Tec Integrators, Inc. - Agoura Hills CA

International Classification:

B65G 1716

US Classification:

198321

Abstract:

A floor mounted inside chain loop carousel conveyor with chain pivots at the inside corners of successive rectangular platforms and with use of spanning "butterfly" bifold guards comprising a pair of identical triangular sides with upper edges pivotally connected to each other and lower edges pivotally connected respectively to adjacent sides at successive platforms. All three pivotal connection seams are equipped with piano-type hinges. The "butterfly" bifold guards, when extended in passing around curved sections of the conveyor provide a bridge higher than, rather than flush with the platform so as to provide a structurally rigid personnel guard.