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Analog-designs Questions Set 9:

Quiz Mode

What does a power amplifier directly amplify?

Voltage

Current

Power

Both voltage and current

Solution:

Which type of power amplifier helps eliminate cross-over distortion?

Class A

Class B

Class AB

Class C

Solution:

What is the modulation index of an FM signal with a carrier swing of 80 kHz and a modulating signal frequency of 8 kHz?

Solution:

Calculate the output ripple frequency of a center-tapped full-wave rectifier when the input sine wave is given as 200 sin 80πt.

40 Hz

80 Hz

100 Hz

200 Hz

Solution:

The open-loop gain of an amplifier is 250. If negative feedback with β = 0.1 is used, the closed-loop gain will be ___________ (rounded off to 2 decimal places)

Solution:

In general, the linear region of a JFET is defined by

Vds << Vds(max) and |Vgs| < 0

|Vp| = 0 and |Vgs| < 0

|Vgs| << |Vp| and Vds << Vds(max)

Vds >> Vds(min) or |Vgs| > 0

Solution:

The output of a transmitter is given by 400[1 + 0.4sin(6280t)]sin(3.14x10⁷t). This voltage is fed to an antenna of resistance 500 Ω. Determine the carrier power.

560 W

320 W

240 W

160 W

Solution:

The longest wavelength that can be absorbed by silicon, which has the bandgap of 1.12 eV, is 1.11 micro m. If the longest wavelength that can be absorbed by another material is 0.87 micro m, then the bandgap of this material is

1.416 eV

0.854 eV

0.706 eV

1.42 eV

Solution:

An amplifier is assumed to have a single-pole high-frequency transfer function. The rise time of the output response to a step function input is 35 ns. The upper 3 dB frequency for the amplifier to a sinusoidal input is approximately:

4.55 MHz

10 MHz

20 MHz

28.6 MHz

Solution:

What is the design rule of thumb for a clamper circuit?

Using a capacitor with very low capacitance

Setting the input voltage such that the whole of it can be reproduced at the output end

Making sure that the input signal is a sinusoidal signal

To make the RC time constant at least 5 times the half period of the input signal

Analog-designs Questions Set 9:

What does a power amplifier directly amplify?

Solution:

Which type of power amplifier helps eliminate cross-over distortion?

Solution:

What is the modulation index of an FM signal with a carrier swing of 80 kHz and a modulating signal frequency of 8 kHz?

Solution:

Calculate the output ripple frequency of a center-tapped full-wave rectifier when the input sine wave is given as 200 sin 80πt.

Solution:

The open-loop gain of an amplifier is 250. If negative feedback with β = 0.1 is used, the closed-loop gain will be ___________ (rounded off to 2 decimal places)

Solution:

In general, the linear region of a JFET is defined by

Solution:

The output of a transmitter is given by 400[1 + 0.4sin(6280t)]sin(3.14x10⁷t). This voltage is fed to an antenna of resistance 500 Ω. Determine the carrier power.

Solution:

The longest wavelength that can be absorbed by silicon, which has the bandgap of 1.12 eV, is 1.11 micro m. If the longest wavelength that can be absorbed by another material is 0.87 micro m, then the bandgap of this material is

Solution:

An amplifier is assumed to have a single-pole high-frequency transfer function. The rise time of the output response to a step function input is 35 ns. The upper 3 dB frequency for the amplifier to a sinusoidal input is approximately:

Solution:

What is the design rule of thumb for a clamper circuit?

Solution:

Related Question Sets:

Related Topics:

Analog-designs Questions Set 9:

What does a power amplifier directly amplify?

Solution:

Which type of power amplifier helps eliminate cross-over distortion?

Solution:

What is the modulation index of an FM signal with a carrier swing of 80 kHz and a modulating signal frequency of 8 kHz?

Solution:

Calculate the output ripple frequency of a center-tapped full-wave rectifier when the input sine wave is given as 200 sin 80πt.

Solution:

The open-loop gain of an amplifier is 250. If negative feedback with β = 0.1 is used, the closed-loop gain will be ___________ (rounded off to 2 decimal places)

Solution:

In general, the linear region of a JFET is defined by

Solution:

The output of a transmitter is given by 400[1 + 0.4sin(6280t)]sin(3.14x107t). This voltage is fed to an antenna of resistance 500 Ω. Determine the carrier power.

Solution:

The longest wavelength that can be absorbed by silicon, which has the bandgap of 1.12 eV, is 1.11 micro m. If the longest wavelength that can be absorbed by another material is 0.87 micro m, then the bandgap of this material is

Solution:

An amplifier is assumed to have a single-pole high-frequency transfer function. The rise time of the output response to a step function input is 35 ns. The upper 3 dB frequency for the amplifier to a sinusoidal input is approximately:

Solution:

What is the design rule of thumb for a clamper circuit?

Solution:

Related Question Sets:

Related Topics:

The output of a transmitter is given by 400[1 + 0.4sin(6280t)]sin(3.14x10⁷t). This voltage is fed to an antenna of resistance 500 Ω. Determine the carrier power.