Electrical and Electronic Circuits End Term: 13 April 2025, Set QEF3 (January 2025 term)

Zeros of a transfer function are frequencies for which the value of the numerator of the transfer function is zero.

If the collector resistances in a BJT differential amplifier are not perfectly matched the common mode rejection that can be achieved increases.

In the linear region, the drain current in a MOSFET is independent of VDS.

A unity power factor implies that all the supplied power is converted into real power and the reactive power is zero.

Consider an nMOS transistor operating in the saturation region. The drain current flowing through the circuit is ID corresponding to a particular value of VGS. Now if the gate to source voltage is doubled with all other parameters remaining the same, the new drain current would become four times the original value.

An element and its V - I characteristics are shown in Figure(a) and Figure(b) respectively. The element is non-linear and active.

The Laplace transform of e^(-7t)u(t) is 1 / (s + 7).

Based on the above data, answer the given subquestions.

Based on the above data, answer the given subquestions.

Based on the above data, answer the given subquestions.

The transconductance gm (in S) is _______

Based on the above data, answer the given subquestions.

The magnitude of the small signal voltage gain is _______

Consider the function F(s) = (8s + 4) / (s² +3s +6).
Based on the above data, answer the given subquestions.

The value of f(0⁻) =

Consider the function F(s) = (8s + 4) / (s² +3s +6).
Based on the above data, answer the given subquestions.

A differential amplifier has a differential gain Ad = 30, common mode gain AC = 0.2. The input voltages V1 = 15 mV and V2 = 5 mV. The output voltage (in mV) is ________

The zener diode in the regulator circuit shown below has a constant reverse breakdown voltage of 9 V for a zener current greater than or equal to 0.25 mA. The input voltage varies from 10 V to 20 V. The maximum load current (in mA) that can drawn from the circuit ensuring the proper functioning is ________

In a series RLC circuit, if the applied voltage is 50 V (RMS), the voltage across the resistor is 30 V (RMS), the voltage across the capacitor is 40 V (RMS), and the supply frequency is 60 Hz. The RMS value of the current flowing through the circuit is 0.2 A.
Based on the above data, answer the given subquestions.

Determine the RMS value of the voltage (in V) across the inductor

In a series RLC circuit, if the applied voltage is 50 V (RMS), the voltage across the resistor is 30 V (RMS), the voltage across the capacitor is 40 V (RMS), and the supply frequency is 60 Hz. The RMS value of the current flowing through the circuit is 0.2 A.
Based on the above data, answer the given subquestions.

In a series RLC circuit, if the applied voltage is 50 V (RMS), the voltage across the resistor is 30 V (RMS), the voltage across the capacitor is 40 V (RMS), and the supply frequency is 60 Hz. The RMS value of the current flowing through the circuit is 0.2 A.
Based on the above data, answer the given subquestions.

Determine the value of L (in mH)

In a series RLC circuit, if the applied voltage is 50 V (RMS), the voltage across the resistor is 30 V (RMS), the voltage across the capacitor is 40 V (RMS), and the supply frequency is 60 Hz. The RMS value of the current flowing through the circuit is 0.2 A.
Based on the above data, answer the given subquestions.

In a series RLC circuit, if the applied voltage is 50 V (RMS), the voltage across the resistor is 30 V (RMS), the voltage across the capacitor is 40 V (RMS), and the supply frequency is 60 Hz. The RMS value of the current flowing through the circuit is 0.2 A.
Based on the above data, answer the given subquestions.

Based on the above data, answer the given subquestions.

Determine the apparent value of threshold voltage Vt (in V)

Based on the above data, answer the given subquestions.

Based on the above data, answer the given subquestions.

Now, with the same device parameters calculated in Q26 and Q27, the drain current (in μA) expected to flow with VGS = 3.2 V and VDS = 0.1 V?

Based on the above data, answer the given subquestions.

If the device is operated at VGS = 3.2 V, at what value of VDS (in V) will the device enter into saturation?

Based on the above data, answer the given subquestions.

When the device is in saturation at VGS = 3.2 V, what is the corresponding drain current (in mA).

With reference to the two-port network shown below, Answer the subquestions.

With reference to the two-port network shown below, Answer the subquestions.

With reference to the two-port network shown below, Answer the subquestions.

With reference to the two-port network shown below, Answer the subquestions.