Francis X Schumacher

US Patent:

7196948, Mar 27, 2007

Filed:

Mar 7, 2005

Appl. No.:

11/074462

Inventors:

Sunil K. Vemula - Sunnyvale CA, US
Francis X. Schumacher - Palo Alto CA, US
Ian P. Shaeffer - San Jose CA, US

Assignee:

Sun Microsystems, Inc . - Santa Clara CA

International Classification:

G11C 7/00

US Classification:

365193, 365191, 365194, 365233

Abstract:

A method for reading data from a memory module over a bi-directional bus is provided. The method initiates with issuing a read command. Then, a strobe signal is transitioned from a mid-rail state. In one embodiment, the strobe signal is transitioned to a logical low state. A read enable signal is then transitioned prior to a first falling edge of the strobe signal. The strobe signal represents an earliest availability for valid read data being available. The valid read data is read in response to the read enable signal transition. A microprocessor and a system wherein data is read over a bi-directional bus are included.

US Patent:

49856391, Jan 15, 1991

Filed:

Jul 7, 1989

Appl. No.:

7/376783

Inventors:

Denny M. Renfrow - San Jose CA
Francis X. Schumacher - Palo Alto CA
Edward R. Helder - Fremont CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

H03K 500
H03K 513

US Classification:

307262

Abstract:

An edge generation circuit phase delays pulses of a first signal propagated on an integrated circuit. The edge generation circuit includes a first variable delay circuit located on the integrated circuit, a delay line located off the integrated circuit and a second variable delay circuit located on the integrated circuit. The first variable delay circuit receives the first signal and produces a second signal which is in phase with the first signal. The delay line receives the second signal and produces a third signal. The third signal is delayed in phase from the second by a precise amount. The second variable delay circuit receives the third signal from the delay line and produces a fourth signal. The fourth signal is in phase with the third signal.

Address:

2781 Ross Rd, Palo Alto, CA 94303

VIN:

JTDKN3DU9A0002596

Make:

TOYOTA

Model:

PRIUS

Year:

2010