Number | Name | Date | Kind |
---|---|---|---|
3816803 | Gordon | Jun 1974 | |
3988696 | Sharpe | Oct 1976 | |
4077016 | Sanders et al. | Feb 1978 | |
4115745 | Egan | Sep 1978 | |
4151463 | Kibler | Apr 1979 | |
4590440 | Haque et al. | May 1986 | |
4689577 | Vreeken et al. | Aug 1987 | |
4924225 | Dingwall et al. | May 1990 | |
4999633 | Draxelmayr | Mar 1991 | |
5027116 | Armstrong et al. | Jun 1991 | |
5302916 | Pritchett | Apr 1994 | |
5337022 | Pritchett | Aug 1994 | |
5572167 | Alder et al. | Nov 1996 |
Entry |
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"Controlled-Root Approach to Digital Phase-locked Loops" Electronic Systems, NASA Tech. Briefs, Apr, 1995, p. 40, Stephens, S.A. et al. |
"PLL's Lock Indicator Detects Latching Simply" by Steve Kirby, Electronics, Apr. 10, 1980. pp.127-129. |
"How Can you be Sure that Your PLL is Really Locked In?" by C. Andrew Sharpe, EDN, Feb. 20, 1977, vol.22, No. 4. pp.109-112. |