help me with the bridge rectifier

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liucheng311

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dear all:
i need to integrate a bridge rectifier within a chip,but i never did this before.i saw someone did this with the circuit be below,i want to know what is the advantage and the disadvantage with this circuit
 

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Hi. Disadvantage is that current goes both ways. The cap will charge, and then discharge through the fet's.

I've seen another drawing having the same function. There, the cmos where all n-channel.
Look at this page.
 
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