CD_IGNITION

Published:2009/6/28 21:50:00 Author:May | From:SeekIC

Uses master oscillator-power amplifier type of DC/DC converter in which two sections of triple 3-input NANDgate serve as 10 kHz square-wave MVBR feeding class B PNP/ NPN power amplifier through two-gate driver. Remaining two gates are used as logic invert-ers. Secondary of T1 has t5.24 meters of No. 26 in six bankwindings, with 20tums No. 14 added and center-tapped for primary. T2 is unshielded iron-core RF choke, 30-100 pH, whh several turns wound over it for secondary. When main 20-A SCR fires, T2 develops oscillation burst for firing sensitive gate-Iatching SCR. Storage ca-pacitor energy is then dumped into ignition coil primary through power SCR.-K. W. Robbins, CD Ignition System, 73 Magazine, May 1974, p 17and19.



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