Bulk connection for diode connected PMOS

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mdeepak12

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I am trying out a CMOS rectifier. I did built a bridge rectifier and it works fine.

The doubt which I am getting now is, how important is the bulk connection in diode connected transistor (PMOS).

Consider a PMOS with Gate-drain (GD) connected, and the bulk connected to source terminal (SB). Now the question is which of these connection form the P and N terminal of the diode and how is it determined.

Which junction in transistor, the diode characteristic is used. Is it drain-bulk, source-bulk of gatedrain-source junction.
Can anyone brief on it?

Thanks in advance.

Regards,
Deepak
 

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