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engrbabarmansoor
Joined: 18 Jan 2007
Posts: 33
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 26 Jan 2007 16:41 Changing positions of MOSFETS in CMOS inverter |
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| What will happen if we change the positions of MOSFETs in a CMOS inverter i.e if we use nMOS as a pull-up and pMOS as pull-down?Will the output be same or different?
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electronics_sky
Joined: 09 Feb 2006
Posts: 43
Helped: 1
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| 26 Jan 2007 20:47 Re: Changing positions of MOSFETS in CMOS inverter |
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| the swing will be limited. Max = Vdd - Vth and Min = Vth. This is due to the Vgs of nMOS and pMOS.
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satyakumar
Joined: 18 May 2006
Posts: 186
Helped: 11
Location: Bangalore
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| 27 Jan 2007 9:49 Re: Changing positions of MOSFETS in CMOS inverter |
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Hi,
if we interchang nmos and pmos then it will no more works like invertor, it behaves like weak buffer with output levels vdd-vth for logic high and vth for logic level zero for input Vin with vdd logic high, and zero for logic zero respectively.
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mydreamhouse
Joined: 07 Oct 2005
Posts: 128
Helped: 3
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| 27 Jan 2007 17:21 Re: Changing positions of MOSFETS in CMOS inverter |
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| it can't work as a inveter
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sivakumar_tumma
Joined: 27 Jan 2007
Posts: 215
Helped: 7
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| 08 Feb 2007 12:22 Re: Changing positions of MOSFETS in CMOS inverter |
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| It wont work as inverter, but buffer with logic level degraded....
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