Patent US 4870593A
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| Patent number | US 4870593A (click link for details and documents via Google Patents) |
|---|---|
| Title | Circuit and method for determining the phase angle of a complex electrical signal |
| Inventors | Ahmed M. F. Said |
| Company | Tektronix Inc |
| Filing date | 1988-04-08 |
| Grant date | 1989-09-26 |