7. The 4066 IC has connected to the input a sine wave (120 H…
Questions
7. The 4066 IC hаs cоnnected tо the input а sine wаve (120 Hz, 1 Vpp). a) Draw a vоltage divider network (R = 330 Ω) to the sine wave input. b) What is the voltage divider output? (show how would you measure this voltage), c) Draw the output observed by an oscilloscope (indicate all the voltage values) 8. a) Determine the length of a Hamming code required to transmit a 1.5B character word. b) What type of code is the Hamming code? c) Show an example (1.5B word) integrated with the Hamming code (use x for the bits and H for the code). 9. In a digital communication system, the ratio of energy per bit transmitted to the noise power density is 12 dB and the carrier to noise is 32 dB. The power in one bit is 4.2 nW and the system temperature is 92 0F. Determine: a) the time duration of 1 bit; b) the bandwidth of the system; c) if the temperature increases to 119 0F what it will be the new ratio of energy per bit transmitted to the noise power density? 10. The bandwidth of a communication channel is 52.4 kHz. The signal to noise ratio is 20 dB. Determine: a) the maximum theoretical data rate in bits per second, b) the maximum theoretical capacity, and c) the number of coding levels needed to achieve maximum speed. 11. Data is transmitted in sixteen sequential packets (2024B /packet) are transmitted. The system BER is 6:10,000. Determine the number of errors in this transmission? 12. A transmitter impedance is 109Ω and provides a current of 64 mA. The transmitter is connected with a 75Ω coaxial cable and the system has a reflection coefficient of 0.65. Determine: a) the SWR, b) the resistive load, c) the reflected power, and d) the output power. 13. Determine: a) the characteristic impedance of a stripline with the following dimensions (d = 0.23 in, h = 0.054 in, w = 0.15 in, t = 0.002 in), that was designed to act as a capacitor of 15 pF at 650 MHz. The PCB dielectris is 2.8. b) the reactance of the capacitor. c) the length of the stripline (shorted line).