Jack William Flinsbaugh

6678271, Jan 13, 2004

Jul 12, 1999

09/351268

Jack Flinsbaugh - San Jose CA

Nortel Networks Limited - St. Laurent

H04L 1256

370392, 370489, 370412, 370419, 370420, 370421, 370463, 370480

An apparatus and method for providing a translation layer between a local bus and a global bus is described. The apparatus has a local bus and a global bus respectively coupled to a local bus gateway and a global bus gateway. A storage unit is coupled to both of the gateways, the storage unit having a traffic unit. Traffic control logic is coupled to at least one of the gateways and to at least one traffic statistic register.

61221279, Sep 19, 2000

Jun 4, 1997

8/849332

Jack W. Flinsbaugh - San Jose CA

Seagate Technology, Inc. - Scotts Valley CA

G11B 503
G11B 509
G11B 502

360 66

Apparatus and method for dynamically programmiing the magnitude of read bias and write currents in a disc drive head. A digital input value is provided to a register of a digital to analog converter, the digital input value indicative of the desired magnitude of the head current. A multiplier of the digital to analog converter multiplies the digital input value by a reference voltage to generate an output voltage. The differential voltage between the reference voltage and the output voltage controls the source to drain resistance of a transistor connected in series with a preamp voltage source of a preamp circuit. By inputting different digital input values, the source to drain resistance of the transistor, and hence the magnitude of the current generated by the preamp voltage source, are precisely controlled. The magnitude of the head current is provided as a multiple of the magnitude of the current generated by the preamp voltage source. During a read operation, the read bias current is provided to the head and the effects of flux trasitions on the read bias current are decoded by a read channel to retrieve the data stored on the disc drive.

62888633, Sep 11, 2001

Apr 24, 2000

9/557247

Jack W. Flinsbaugh - San Jose CA

Seagate Technology LLC - ScottsValley CA

G11B 503
G11B 509

360 66

Apparatus and method for dynamically programming the magnitude of read bias and write currents in a disc drive head (30A, 30B). A digital input value is provided to a register (80) of a digital to analog converter (76, 78), the digital input value indicative of the desired magnitude of the head current. A multiplier (82) of the digital to analog converter (76, 78) multiplies the digital input value by a reference voltage to generate an output voltage. The differential voltage between the reference voltage and the output voltage controls the source to drain resistance of a transistor (106) connected in series with a preamp voltage source (114, 120) of a preamp circuit (70). By inputting different digital input values, the source to drain resistance of the transistor (106), and hence the magnitude of the current generated by the preamp voltage source (114, 120), are precisely controlled. The magnitude of the head current is provided as a multiple of the magnitude of the current generated by the preamp voltage source (114, 120). During a read operation, the read bias current is provided to the head (30A, 30B) and the effects of flux transitions on the read bias current are decoded by a read channel (68) to retrieve the data stored on the disc drive.

60886625, Jul 11, 2000

Dec 13, 1996

8/766495

Jack W. Flinsbaugh - San Jose CA
Ronald D. Metzner - Yukon OK
Clyde E. Goodner - Midwest City OK
Monty A. Forehand - Yukon OK
Gopinath K. Bendigeri - North Ogden UT

Seagate Technology, Inc. - Scotts Valley CA

G11B 1518
G01K 700

702132

A temperature sensing system for use in a computer disc drive comprises a themoelectric sensor having an output sensor voltage which is variable as a function of temperature, an interface circuit adapted to receive the output sensor voltage from the thermoelectric sensor and adapted to generate a scaled and level-shifted analog output voltage signal, and an analog-to-digital converter circuit adapted to receive the analog output signal voltage from the interface circuit and convert the analog output signal voltage into a digital signal which is compared to various defined thresholds.