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Im using digital isolator to isolate my PWM signals. Output VO does show any PWM output. What may be the issue here. I have used 1kohm at R1. Input side:

PWM_H_In : PWM signal from function generator PWM_L_In : SGND

Output side Supply: VDDH: +6V VEEH: -3V


1 Answer 1


You have filtered the PWM away with the 0.1 uF capacitor.

  • \$\begingroup\$ I removed the 0.1uF, i can see PWM output now. However output level is 2X of input. \$\endgroup\$ Commented Mar 5 at 13:51
  • \$\begingroup\$ @RohanKharvi If so, then that's a neat observation what your circuit does. I don't know what you expected to see and why. \$\endgroup\$
    – Justme
    Commented Mar 5 at 13:54

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