4. Why the signal – to – noise performance of pulse modulation is closely related to the signal – to – noise performance of analogue modulation?
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Q: 4. How to use the PLL circuit and the logic circuit to comprise a doubler frequency circuit?
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4. Why the signal – to – noise performance of pulse modulation is closely related to the signal – to – noise performance of analogue modulation?
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- What are specifications of Analog modulation techniques?What is the problem with AM signal when overmodulation occurs?The modulation index of the PM signal is 2. If a modulating signal that has amplitude of 50 mV at a frequency of 3 kHz phase modulates a 90 kHz carrier signal, what would be the new modulation index of the signal? Assume that the amplitude of the modulating signal is increased by 50%.
- QUESTION 2 a. In a full wave rectification, average DC current, RMS value of Current, DC power output and AC power input are very important parameters. Derive the expressions for them. b. Explain why the BC junction of an NPN transistor is reversed biased? c. Draw the circuit of inductor filter and explain its operation.How to draw a signal flow graph?1-Ideal Envelop Detector 2-AM demodulation using diode and RLC circuit 3-Demodulation of AM signal using envelop detector Question 8: Can an overmodulated AM signal be recovered with the above demodulators? If possible, explain how.
- a) what should be the operating frequency to have a high frequency gain of 30 % lower that the mid band gain. Assume a DC gain of 100 dB & Dc cut – off frequency @ 15 KHz.?What mathematical operation does an amplitude modulator perform? What is the ideal relationship between the modulating signal voltage Vm and the carrier voltage Vc?For the C.R.O. square voltage waveform shown in Figure determine (a) the periodic time, (b) the frequency and (c) the peak-to-peak voltage. The 'time/cm' (or timebase control) switch is on 100 us/cm and the 'volts/cm' (or signal amplitude control) switch is on 20V/cm.
- Hello. I am curious why does the MOSFET i -v characteristic "flatten out" in the saturatin region?Explain the concept of mixed-signal microchips and their importance in interfacing between analog and digital components in electronic systems.In ............. type of test signal ,the signal will have high magnitude at one time .