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
| Manufacturer | Model | Description | Designers | Introduced |
|---|---|---|---|---|
| Tektronix | 7A19 | 600 MHz amplifier | Thor Hallen • Val Garuts | 1971 |
| Tektronix | 7904 | 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 |
| Tektronix | R7903 | 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 | 1974 |
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 |
Links
- A Subnanosecond Realtime Oscilloscope, Tekscope Vol.3 No.4 July 1971