Mention the various IC logic families.
Ans. Different IC Logic Families: Digital IC's are fabricated through employing either the Unipolar or the Bipolar Technologies and are termed to as Unipolar Logic Family or Bipolar Logic Family
I Bipolar Logic Families:
Two kinds of operations in Bipolar Logic Families that are:
a. Saturated Logic Families
b. Non-saturated Logic Families
a. Saturated Logic Families: In this, the transistors in the IC are driven into saturation.
1. Resistor-Transistor Logic (RTL).
2. Direct-Coupled Transistor Logic (DCTL)
3. Integrated-Injection Logic (I²L)
4. Diode -Transistor Logic (DTL)
5. High-Threshold Logic (HTL)
6. Transistor-Transistor Logic (TTL)
b. Non-saturated Logic: In this logic, the transistors are not driven to saturation.
1. Schottky TTL
2. Emitter Coupled Logic (ECL)
3. Unipolar Logic Families:
II. MOS devices are Unipolar devices
Simply MOSFETs are employed into MOS logic
circuits. The families of MOS logic are
(i) PMOS
(ii) NMOS, and
(iii) CMOS
Whereas in PMOS only p-channel MOSFETs are utilized and in NMOS only n-channel MOSFETs are utilized, in complementary MOS (CMOS), P and N both channel MOSFETs are utilized and are fabricated on similar silicon chip.