Analog Circuits Practice Test 10

1. For a BJT, for common base configuration the input characteristics are represented by a plot between which of the following parameters?

2. In a BJT, which of the following layers is heavily doped?

3. In the figure below, the voltage V1 ranges from 15 to 35V. The load current is 20mA. The diode knee current is 2 mA, the breakdown voltage is 5V and power rating is 200 mW.

Calculate the range of R2 for the circuit to behave properly as a regulator.

4. Given that for an op-amp the gain is 10³, the slew rate is 1.5V/μsec. Input is 5x10^-3sinωt, calculate maximum frequency to prevent distortion.

5. In the given circuit, what is the value of V_E when using a silicon BJT?

6. Given that CMRR is 100dB. Input common-mode voltage is 12 V. Differential voltage gain is 4000. Calculate output common-mode voltage.

7. Find which one is a sallen-key topology.

8. Consider the circuit shown. The input V_I = 10sin2π10⁶t. Calculate the duty cycle of the output.

9. The unity gain bandwidth for an op-amp having open loop gain 2x10⁶ is 10 Mhz. Calculate the AC gain of op-amp at an input of 2000 Hz.

10. From the given characteristics, what is the approximate value of I_C at I_B=30 uA and V_CE=10 V?