enter image description here Hello, I made a rectifier circuit. I also include a comparator. I referred to this paper --> An ultra-low-voltage self-powered energy harvesting rectifier with digital switch control.

The circuit consists of two stage. first stage, Va signal is working(green color). In the next step, however, the voltage drops rapidly.

The output of the vc is not generate. A point connected with a load

Please help me.

Have a nice day. thk.

enter image description here

  • \$\begingroup\$ What is the load? \$\endgroup\$ – Dampmaskin Mar 22 '17 at 9:05
  • \$\begingroup\$ I made 10u cap and 20K resistor \$\endgroup\$ – Jeong Jeong Hoon Mar 22 '17 at 9:13

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