Cadence Technical Interview Questions For EE And EC Students

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Cadence Technical Interview Questions

01. In the cascade amplifier shown in the figure, if the common-emitter stage (Q1) has a transconductance g_m1 and the common base stage (Q2) has a transconductance g_m2 then the overall transconductance g(=i0 / Vi) of the cascade amplifier is

Options:

a. g_m1

b. g_m2

c. g_m1 / 2

d. g_m2 / 2

The answer is: a. g_m1

Solution:

Q1 has transconductance?_??

Q2 has transconductance?_??

Overall transconductance? = i₀ / V_i

i₀ = i_E2 = i_c1 so g = g_m1

02. In the figure, A2 reads 3 amps, A3 reads 4 amps, A4 reads 8 amps. Find A1 reading.

Options:

a. 10 amps

b. 15 amps

c. 8 amps

d. 16 amps

The answer is b. 15 amps

As the ammeter is reading values and all loads are connected in parallel means we have to add currents.

03. Evaluate for Y at the end of the ex-nor gate and NOT gate at the 20th time when stating one and one are inputs? The figure is shown below

Options:

a. One

b. Zero

c. Both

d. None

The answer is a. One

Solve by yourself by seeing a table of the ex-nor gate.

04. A dc power supply has a no-load voltage of 30 volts, full load voltage of 25 volts at a full load current of 1 amp. Find output resistance and load regulation?

Options:

a. 20 ohm & 30%

b. 10 ohm & 25%

c. 5 ohm & 15%

d. 25 ohm & 20%

The answer is d. 25 ohm & 20%

Solution:

R = V/I = 25/1 = 25 Ohms
 
Load regulation:
 
Rth = (Vnl – Vfl)/Ifl
= (30 – 25)/1
Rth = 5 ohms
 
Load regulation = ((Rth) / (Rl)) * 100
= (5/25) * 100
= 20%

Still, we will update some questions with solutions.

I hope this article “Cadence Technical Interview Questions” may help you all a lot. Thank you for reading.

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