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regarding the operation of MOS transistor

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how on are you going to trigger it then

we use a dc supply at the gate to trigger the MOS
 

FETs are designed to carry current in only one direction so they must operate from a DC source. The voltage applied between the gate and source controls the amount of current flowing through the transistor. Without the proper DC biases the FET does not perform a useful function.
 
1 small rephrase

MOS trannies can carry the desired amount of current or amplified form of current op only when the gate source voltage is adequate if it is not there is no point in going for a MOS

the Vgs is always a DC voltage given


if you are not still clear we need to hear more from you

do tell us the nature for this is an absurd qn

are you meaning to apply a DC voltage between the Drain and source or some thing like that do post on
 

thanks for replying........ actually i trying to design a down conversion mixer inn that when i m applying DC voltage at LO switch, in negative cycle of LO mos is not off. so much noise is generated. so is there any option to trigger a mos without dc bias or using only AC suppy.
 

nisha gupta said:
thanks for replying........ actually i trying to design a down conversion mixer inn that when i m applying DC voltage at LO switch, in negative cycle of LO mos is not off. so much noise is generated. so is there any option to trigger a mos without dc bias or using only AC suppy.
Click to expand...

try to understand noises are inevitable in amplification but they can be reduced adequately by using some filters both in the ip and op side that will reduce the noise to an extent not more than that
 

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