Mosfet as switch

[ali electronic]

I am trying to model a ciruit which includes 2 MOSFETs which work as switches.

Can I use a normal switch instead of the MOSFETs.

thanks

 

[Paul Burridge]

On 14 Dec 2004 02:38:19 -0800, ali@vuetec.com (ali electronic) wrote:

I am trying to model a ciruit which includes 2 MOSFETs which work as switches.

Can I use a normal switch instead of the MOSFETs.

It depends. I assume from the question that accurate modelling of the
MOSFET's analogue properties is not required, so yes, you could
probably use a switch, but personally, I'd still make allowances for
the devices turn-on/turn-off times.
--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[qrk]

On 14 Dec 2004 02:38:19 -0800, ali@vuetec.com (ali electronic) wrote:

I am trying to model a ciruit which includes 2 MOSFETs which work as switches.

Can I use a normal switch instead of the MOSFETs.

thanks

You can. In some cases, it will work fine. You can use a
voltage-controlled switch (S) which allows you to add resistance that
varies with the input voltage. A simple switch will not include
parameters of the MOSFET which could be important to the outcome of
your simulation.

Mark