BIBLIOGRAPHY
- Basu (P K), Das Sarma (A), Ghosh (D K) & Zoha (M S). Direction Sensing and Electronic Gearing in N/C Circuits J.I.I S.T. 4, 2; 1974.
- Alex (T K). Frequency Doubler Covers Wide-Frequency Range for Unsymmetrical Square Waves. Electronic Design, 16, August 2, 1974; 115–116.
- Ross(W). Pulse Train Frequency Varied as Duty Cycle Slays Constant. Electronics, July 21,1969; 84.
- Laynon(H P D). One Shot with Feedback Loop Maintains Constant Duty Cycle. Electronics, July 24, 1975; 93.
- Stitt (R M) & Morrison (R L). Wide Range Pulse Shaping Circuit Gives Square Waves with 50% Duty Cycle. Electronic Design, 8, April 12, 1974; 116.
- Taylor (RL). Frequency Doubler Square Wave Output. Electronics, July 22,1976; 111.
- Zagajewski (T) & Moll (E). Pulse Multiplication Using Walsh-Function. Electronic Engg. Mid May 1978; 29–32.