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use pmos or pnp as active load?

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mona123

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I have option on SiGeBiCMOS process to use pnp BJT or pFET device as active load. which one should I use and why? thanks.
 

It depends on what you want. Usually BJTs suffer higher current loss, but can accomodate higher currents than FETs
 

can you please expalin a little more elaborately? thanks. why BJT have more current loss? what is current loss ?
 

MOSFETs have near-zero gate to source leakage, where as BJTs do have a significant base current.

On the other hand, if you wish to draw large currents, BJTs are much more effective.

It all depends on what you need to achieve.
 

why is pnp more effective than pmos in drawing large current?
 

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