A. design plan
B. does verification
C. set of equations
D. floor plan
Answer: C
The circuit description contains information about circuit components and interconnections. This is transformed using a simulator into a set of equations from which predictions of behaviour are made.
2. The electrical behaviour of a circuit is given using
A. design rules
B. floor plan
C. structures and layouts
D. mathematical modelling
Answer: D
The electrical behaviour is defined by mathematical modelling and its accuracy is measured using the accuracy of simulation and computing power and time for simulation.
3. Which gives the main electrical behaviour of various parts of the circuit?
A. circuit simulator
B. timing simulator
C. logic level simulator
D. functional simulator
Answer: A
Circuit simulators are concerned with the electrical behaviour of the various parts of the circuit to be implemented in silico
n.
4. Which takes lots of simulating time?
A. circuit simulator
B. timing simulator
C. logic level simulator
D. functional simulator
Answer: A
Circuit simulators take a lot of computing time to simulate even a small section of the system and are completely impractical for circuits of any real magnitude.
5. Timing simulator concentrates on
A. quiescent nodes
B. active nodes
C. passive nodes
D. electrical nodes
Answer: B
The timing simulator concentrates on active nodes and ignores the quiescent nodes in simulation and improves the design accordingly.
6. The accuracy of the simulation depends on the accuracy of
A. fabrication house parameters
B. electrical parameters
C. active parameters
D. functional parameters
Answer: A
The accuracy of the simulation depends on the accuracy of fabrication house parameters which must be fed into the simulator which is in the range of 20% or better.
7. Which is important during the design phase?
A. circuit simulator
B. timing simulator
C. logic level simulator
D. functional simulator
Answer: B
Timing simulators are increasingly important during the design phase because of their speed and consequent interactive qualities.
8. Run times are _______ to a number of devices and nodes.
A. linearly related
B. inversely related
C. exponentially equal
D. does not relate
Answer: A
Run time is linearly related to the number of devices and nodes being simulated. The structure of timing simulator tools ensures this relationship.
9. Improvement of transistor modelling includes
A. body effect
B. channel length modulation
C. carrier velocity saturation
D. all of the mentioned
Answer: D
To improve the transistor modelling it is possible to include body effect, channel length modulation and carrier velocity saturation.
10. Channel length modulation is for voltages
A. exceeding threshold
B. exceeding onset of saturation
C. exceeding power supply
D. exceeding onset of non-saturation
Answer: B
Channel length modulation is for voltages exceeding the onset of saturation there is an effective decrease in channel length of a short channel transistor.
