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Help regarding sizing MOS for rectifier

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saonibanerji

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Hi,

I am designing a High efficiency cmos rectifier for biomedical applications. I have attached the circuit along with the output voltage waveforms. Though it is fully rectified, the waveforms tend to extend highly into negative region. How could I possibly size the mosfets to prevent this?

I have simulated the circuit for Transient analysis, added a vsin of 1 V and frequency of 380 KHz ( frequency of the application) and for the load have added a parallel combination of R = 30 Kohms and C = 5 pF.

Looking forward to needful suggestions!!

Thanks in advance:)
 

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