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Compare Pass transistor logic, NMOS logic & CMOS logic
written 6.2 years ago by
hetalgosavi
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modified 2.1 years ago
by
sagarkolekar
★ 11k
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written 5.1 years ago by
hetalgosavi
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| PTL | nMOS | CMOS |
|---|---|---|
| Vs in case of nMOS PTL and VD in case of pMOS PTL is used as output. | Enhancement type nMOS transistor used as pull up device. | pMOS transistor is used as pull up device. |
| Power dissipation is low as VDD line is not required. | Power dissipation is high as rail to rail current flows when Vin is high. | Power dissipation is very low. |
| Only nMOS or pMOS devices are used. | Only nMOS devices are used. | Both nMOS and pMOS devices are used. |
| Space requirement is less. | Space requirement is more than PTL. | Space requirement is more than PTL. |
| VDD supply is not required except for inverter. | Extra supply rail is required. | Extra supply rail is not required. |
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