GATE (Graduate Aptitude Test in Engineering) Electronics: Questions 962 - 963 of 1076

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Question 962

Amplitude Modulation and Demodulation

Appeared in Year: 2019

Question

Numeric Answer▾

A voice signal is in the frequency range to . The signal is amplitude modulated to generate an AM signal , where . The AM signal is to be digitized and archived. This is done by first sampling at times the Nyquist frequency, and then quantizing each sample using a 256-level quantizer. Finally, each quantized sample is binary coded using K bits, where K is the minimum number of bits required for the encoding. The rate, in Megabits per second (rounded off to 2 decimal places) , of the resulting stream of coded bits is ________ .

Question 963

Mid-Frequency Small Signal Analysis and Frequency Response

Appeared in Year: 2016

Question

MCQ▾

Which one of the following statements is correct about an ac-coupled common-emitter amplifier operating in the mid-band region?

Choices

Choice (4)Response

a.

The device parasitic capacitances behave like open circuits, whereas coupling and bypass capacitances behave like short circuits.

b.

The device parasitic capacitances, coupling capacitances and bypass capacitances behave like short circuits.

c.

The device parasitic capacitances behave like short circuits, whereas coupling and bypass capacitances behave like open circuits.

d.

The device parasitic capacitances, coupling capacitances and bypass capacitances behave like open circuits

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