written 20 months ago by
s22j1925
• 20
|
modified 18 months ago
by
sagarkolekar
★ 10k
|
Describe and compare the characteristics of TTL and CMOS Logic families.
written 20 months ago by
DevarenjiniP
• 3.1k
|
• modified 20 months ago |
DEFINITION:
THE GROUP OF COMPATIBLE DEVICES (INTEGRATED CIRCUITS) WITH THE SAME LOGIC LEVELS AND SUPPLY VOLTAGES ARE CALLED AS A DIGITAL LOGIC FAMILY
| CMOS | TTL |
|---|---|
| Use FETS | Use BJTS |
| Symmetric Device Sourceand Drain Interchangeable | Non Symmetric Device Non InterchangeableCollector and Ēmmitor |
| Voltage Controlled Current,Device | Current Controlled Current Device |
| Very high Input Resistance => Very low power consumptionwhen not being used => Imperative for SmallIntegrated Device |
Lower input Resistance |
| MOSFETS are nonlinear inworking conditions: | BJTS are linear in activeregion, i.e. |
| $ ID α Vgs^2 $ | Ic = a.lb |
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