APPENDIX A DIGITAL PULSE-WIDTH MODULATION (PWM) CARD CIRCUIT A schematic diagram of the digital PWM card circuit is shown in figure A1. The parts are ... The synchronizer consists of a 74LS74 D flip-flop. a 7404 inverter gate, and a 7402 NOR gate. The dividers are ... The 1-MHz signal is also divided by 1000 with three cascaded 7490 decade counters each configured to divide by 10.
|Title||:||Design of a CO2 Laser Power Control System for a Spacelab Microgravity Experiment|
|Author||:||Carl J. Wenzler|