Number | Name | Date | Kind |
---|---|---|---|
3277406 | Ocker | Oct 1966 | |
3715690 | Young et al. | Feb 1973 | |
4760535 | Englmeier | Jul 1988 | |
4839617 | Speake | Jun 1989 | |
4970479 | Landt et al. | Nov 1990 |
Number | Date | Country |
---|---|---|
0552654 | Apr 1977 | SUX |
Entry |
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Walters et al, "Helical filters with PIN-diode Q-control for Pre-converter AGC, Conference on Radio Receivers & Associated Systems", Jul. 1972, pp. 61-67. |