Thor Hallen

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Thor Hallen

Thor Oscar Hallen (b. 1939 – d. 2002) was a Tektronix engineer.

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Tek products

  • 7904 vertical amplifier
  • 7A19 amplifier plug-in
  • 1A7A differential amplifier plug-in with true differential offset

Products by Thor Hallen

Model Class Description Designers Introduced
7A19 Plug-in 600 MHz amplifier Thor Hallen Val Garuts 1971
7904 Oscilloscope 500 MHz non-storage mainframe Val Garuts Thor Hallen John McCormick Les Larson Bill DeVey Bill Peek Hans Springer Joe Burger Joel Swanno Ken Hawken 1971

Components by Thor Hallen

Model Class Description Designers Used in
155-0059-00 Monolithic integrated circuit HF amplifier Thor Hallen 7834 7844 7854 7904 R7903 R7912 7912AD
203-0080-90 Monolithic integrated circuit HF output amplifier Thor Hallen 155-0065-00 155-0064-01 155-0125-00

Patents by Thor Hallen

Page Office Number Title Inventors Company Filing date Grant date
Patent US 3924198A US 3924198A Transistor amplifier having single control to simultaneously adjust level input resistance and input voltage Thor Hallen Tektronix Inc 1971-08-12 1975-12-02
Patent US 3715609A US 3715609A Temperature compensation of voltage controlled resistor Thor Hallen Tektronix Inc 1971-08-17 1973-02-06

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