Number | Name | Date | Kind |
---|---|---|---|
4176329 | Moskowitz | Nov 1979 | |
4262260 | Tamura | Apr 1981 | |
4538298 | Bose | Aug 1985 | |
4764967 | Christopher | Aug 1988 | |
4891841 | Bohn | Jan 1990 |
Entry |
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Audio Handbook by D. Bohn, National Semi Conductor, 1976, pp. 2-40 to 2-49. |
Radiotron Designer's Handbook, Supplement, by F. Langford-Smith, Wireless Press, 1953, p. 1483. |