Patent US 3274505A
| Patent number | US 3274505A (click link for details and documents via Google Patents) |
|---|---|
| Title | Series transistor circuit with selectively coupled stages |
| Inventors | Arnie Frisch, Larry Weiss, Morris Engelson |
| Company | Tektronix Inc |
| Filing date | 1964-02-28 |
| Grant date | 1966-09-20 |
Related products:
| Manufacturer | Model | Description | Introduced | Designers |
|---|---|---|---|---|
| Pentrix | Pentrix L20 | 4 GHz Spectrum Analyzer plug-in | 1963 | |
| Pentrix | Pentrix L30 | 10.4 GHz Spectrum Analyzer plug-in | (?) |
The ultimate objective was a portable SA, but time was of the essence so we came up with an interim short-cut. The display circuitry and power supply already existed in the Tekronix mainframe. All we had to do is design the RF SA plug-in.
Then we discovered that we had neglected two important areas: shielding for the highly sensitive RF circuits and power supply conversion from higher voltage tubes to lower voltage transistors.
My experience with EMI and Larry’s mechanical layout capability solved the RF shielding problems, and Arnie came up with a clever way to utilize the power supply from the Tektronix mainframe. This yielded a patent on which my name also appears, but actually my contribution to this design was miniscule; most of the work was done by Arnie.