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A baseband link uses an equalized telephone line to send polar NRZ current pulses at 10 ksps. The link uses ideal low pass RRC filters with α = 0.5. The output power of the digital transmitter is 0 dBm and the link has a constant attenuation of 50.0 dB. At the input to the receiver, the equivalent AWGN noise power is – 70 dBm. Assume implementation margin is 0 dB when calculating BER in parts (c) and (d).
a. What is the minimum bandwidth of the telephone line to transmit the pulses without distortion?
b. What is the signal to noise ratio at the input to the receiver in dB and as a power ratio?
c. What is the bit error rate at the receiver output and the average time between errors?
d. Rain leaks into a junction box in the link and causes the noise power at the receiver to increase to -60 dBm.
e. What is the bit error rate at the receiver output and the average time between errors in part (d)?
Drift velocity the actual (physical) velocity of electrons along the wire. Transmission velocity the rate at which information can be transmitted electronically using conducing wires. How is it possible that the transmission velocity is so much faste..
The question considers the design of a 8x1 multiplexer using gates. Assume the data inputs are I0,...,I7 and the select inputs are S2, S1 and S0. (a) Write a sum-of-products expression for the 8x1 multiplexer.
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A buffer amplifier with a gain of 1 V/V has an input resistance of 1M and an output resistance of 10 ohm. It is connected between a 1-V, 100-k ohm source and a 100-ohm load. What load voltage results and what are the corresponding voltage, current,..
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Create the layout design for MOS inverter using a depletion-type transistor with VTL = -0.3V and an enhancement-type device with VTO = 0.5V such that tPLH is less than or equal to 15ns and tPHL is less than or equal to 1ns
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Design (showing address, data, control line connections) a 32*8 low-order interleaved memory system using 16*2 memory chips for a system that uses 8-bit address bus.design assuming the unused address lines to be all ‘0's
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