Search

Thomas Tullsen Phones & Addresses

  • Peoria, AZ
  • 2097 Treewood Ln, San Jose, CA 95132 (408) 263-4553
  • Sunnyvale, CA
  • Fremont, CA
  • Maricopa, AZ
  • 2097 Treewood Ln, San Jose, CA 95132 (408) 476-3278

Work

Position: Retired

Education

Degree: Associate degree or higher

Publications

Us Patents

Bipolar Voltage To Frequency Converter

View page
US Patent:
48397881, Jun 13, 1989
Filed:
Jan 29, 1988
Appl. No.:
7/150139
Inventors:
Thomas R. Tullsen - San Jose CA
Assignee:
Dionex Corporation - CA
International Classification:
H02M 702
US Classification:
363 63
Abstract:
A bipolar voltage to frequency converter which utilizes a single operational amplifier for generating appropriate signals representative of the frequency and signs of a bipolar input signal. The present invention has applications in chemical chromatography, absorption meters and data acquisition systems.

Chromatographic Optical Detector With Logarithmic Calibration Circuit

View page
US Patent:
47000597, Oct 13, 1987
Filed:
Mar 13, 1986
Appl. No.:
6/839105
Inventors:
Thomas R. Tullsen - San Jose CA
Assignee:
Dionex Corporation - Sunnyvale CA
International Classification:
G01D 1800
G12B 1300
US Classification:
250214AG
Abstract:
An optical detector is provided. The optical detector provides automatic zeroing of a logarithmic ration function in applications such as absorption meters, fluorometers and other chromatographic techniques.
Thomas R Tullsen from Peoria, AZ, age ~88 Get Report