Describe and compare the characteristics of TTL and CMOS Logic families.
Fundamentals of Digital Electronics
THE GROUP OF COMPATIBLE DEVICES (INTEGRATED CIRCUITS) WITH THE SAME LOGIC LEVELS AND SUPPLY VOLTAGES ARE CALLED AS A DIGITAL LOGIC FAMILY
|Use FETS||Use BJTS|
|Symmetric Device Sourceand Drain Interchangeable||Non Symmetric Device
Non InterchangeableCollector and Ēmmitor
|Voltage Controlled Current,Device||Current Controlled
|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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