Up/down slope control circuit

Published:2011/8/10 4:05:00 Author:Nicole | Keyword: up slope, down slope, control circuit | From:SeekIC

This circuit adopts Siliconix DG387CJ solid circuit relay to produce cut-over from up slope slope to down slope, when servo mechanism is in new zero, the circuit will slow down. The slope factor depends on the adjusting position of R1, R2. This circuit arrangement can ensure the best servo mechanism system response with low cost. The input singal detected by A1 is not zero, then starting the photoelectric isolator A3, to cut over A4. The system load is moved to the needed position by positive slope which is produced by A5, then the feedback voltage of servo mechanism will counteract the control input voltage. When this voltage drops to within 0.7V from ground potential, A1 outputs 0 , A3 cuts off. A4 starts down slope waveform, the system will slow down and until stop. For 20V/s slope factor, it takes C=0.33μF, R3=1.8MΩ.



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