BiCMOS Logic Gates MCQ Quiz – Objective Question with Answer for BiCMOS Logic Gates MCQ

1. The BiCMOS are preferred over CMOS due to ______________

A. Switching speed is more compared to CMOS
B. Sensitivity is less with respect to the load capacitance
C. High current drive capability
D. All of the mentioned

Answer: D

These are the 3 advantages of BiCMOS over CMOS.

 

2. The transistors used in BiCMOS are __________
A. BJT
B. MOSFET
C. Both BJT and MOSFETs
D. JFET

Answer: C

BiCMOS is a combination of both MOSFET and BJT.

 

3. The high current driving capability of the BiCMOS is due to __________
A. NMOS in saturation mode
B. PMOS in saturation mode
C. CMOS
D. BJT

Answer: D

BJT has a high current driving capability.

 

4. In BiCMOS inverter, the BJT used are __________

A. Only Npn BJT
B. Only Pnp BJT
C. Both NPN and PNP BJT
D. Multi emitter npn BJT

Answer: A

NPN BJTs are used in BiCMOS inverter.

 

5. Which of the following is the drawback of the BiCMOS circuits?

A. Sensitivity is less load capacitance
B. Bipolar transistors are used for driving current to the load capacitance but not for the logic operations
C. Increased fabrication Complexity
D. All of the mentioned

Answer: C

The other 2 are the merits of BiCMOS, Increased fabrication Complexity is a demerit of BiCMOS circuits.

 

6. The Bipolar Transistor is fabricated on __________

A. Same substrate of nMOS
B. N-well in p Substrate
C. P-well in n Substrate
D. Same substrate of pMOS

Answer: A

BiCMOS is fabricated on the same substrate as nMOS.

 

7. The n-well created for Bipolar Transistor in BiCMOS is used as __________

A. Substrate
B. Collector
C. Emitter
D. None of the mentioned

Answer: B

The created n-Well is used as the Collector region for BiCMOS.

 

8. The n-well collector is formed by __________

A. Lightly doped n-type epitaxial layer on p-Substrate
B. Heavily doped n-type epitaxial layer on p-Substrate
C. Lightly doped n-type diffused layer on p-Substrate
D. Heavily doped n-type diffused layer on p-Substrate

Answer: A

To make the doping concentration less than the emitter.

 

9. The collector contact region is doped with higher concentration of n-type impurities due to __________

A. It creates a depletion region at the contact surface
B. It creates a low conductivity path between the collector region and contact
C. It reduces contact resistance
D. It can withstand high voltages as compared to the collector region

Answer: C

The collector contact region is doped with a higher concentration of n-type impurities reduces contact resistance.

 

10. What is the work of BJT in BiCMOS?

A. Current controlled Voltage source
B. Voltage controlled Current source
C. Current controlled current source
D. Voltage controlled current source

Answer: B

The Current Ic and Ie are controlled by the base-emitter bias voltage.

Scroll to Top