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The diagram of FIGURE 2 shows a bi-directional opto coupler input interface circuit. When a supply voltage of 20 V is applied the LED carries a current and 2 V is dropped across it. Calculate the value of the LED current and the value of current through the 3 kΩ resistance.
An antenna is transmitting with a carrier frequency of 1800 MHz. If the transmit power is 10 Watts, what will be received power at a distance of 500 meters from the antenna? Calculate the path loss in dB. (Use the free space path loss expression o..
A circuit must detect a 01 sequence. The sequence sets z = 1, which is reset only by a 00 sequence. For all other cases, z = 0. For example, for input sequence as follows, the corresponding output sequence would be: x = 010100100
digital communication techniques a video signal contains light variations that change at a frequency as high as 3.5
Determine the maximum and minimum values of the magnitude response. How many peaks occur in the magnitude response in the frequency range from zero to 2π. What are the locations of the peak and dips
An urn contains 4 red balls and 2 black balls. Two balls are chosen at random and without replacement. What is the probability of obtaining one red ball and one black ball in any order Verify your results by enumerating all possibilities using a c..
Design a basic pacemaker circuit in PSPICE/LTSPICE using a 555 timer, switching transistor and a RC pulse output circuit. Report your design, schematic, input and output waveforms and design rationale.
a)For what value of capacitance will these condition exist ,assuming that impressed voltage ,frequency,resistance and inductance remain unchanged. b)Calculate the voltage drop across the capacitance under this condition.
What are the essential features of an ideal op amp? Identify the terminals of an op amp. Draw its equivalent circuit. Define virtual ground and what is difference amplifier? Draw its circuit. Define C.M.R.R.
A sequence of 10 bits is transmitted over a binary symmetric channel with bit error probability Pe. Assume that bit errors occur independently. The sequence is considered to be received in error if more than two bit errors occur.
the finite-difference time-domain fdtd method is a computational electromagnetic technique for solving for
A 4.8 mF capacitor has been charged to11 V. The energy storedin the capacitor is used to light up a 0.3 KOhm lamp. Find the current flowing through the lamp 2.1 sec after the switch was turned on.
1. What does "transfer function" of a filter represent 2. What do the Amplitude Ratio (Gain) and Phase Angle represent 3. What are the key differences between a real filter (the RC circuit) and an Ideal Filter (please read LPF Treated as an Ideal F..
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