Should a 3.3v digital system drive signals into a 5v system? Should a 5v system drive...
We have a microcontroller (MCU) that operates at 3.3V. We want to connect a pushbutton switch to a digital input and a LED on a digital output. The pushbutton is normally open until pressed. The LED has a forward voltage of 2.3V at the operating current of 10mA. We want the input at the microcontroller to go high when the button is pressed. We want the LED to light up when the digital output is low Q5 Explain what two...
Module 2 - Quiz 2 TRUE OR FALSE T F 1. Only digital signals can be used to convey information in the communications environment, T F 2. The greater the bandwidth of the signal the greater its information carrying capacity T F 3. The transmission media that are used to convey information can be classified as guided or unguided. T F 4. Twisted pair may only be used to transmit analog and digital signals. T F S. Both analog and...
Assume the threshold voltage is 1.2V for both NMOS and PMOS. You have three 5V digital inputs A, B and C. The power supply is 5V. Draw the CMOS implementation of the following logic function ? = ??̅ + ??
Q1 Marks: 40 A digital communication system has 96 analog telephone signals, each band limited to 4 kHz. The telephone signals are converted to digital binary data using Pulse Code Modulator (PCM) system, which use a uniform quantiser followed by an 8-bit encoder. The system uses two bits for synchronization. The digital binary data are then time-division multiplexed and transmitted over a single communication channel. Analyse the communication system by considering the following principles: (i) Determine the number of quantization...
Problem 1: A baseband digital communication system employs the signals shown below (Figure 1) for transmission. The channel has no attenuation and the noise is AWGN with power-spectral density NO/2. The probability of transmitting sı(t) is twice that of sz(t). S1() T12 O TV2 T Figure 1 2 a) Find an appropriate orthonormal basis for the representation of the signals. 7 b) Plot the constellation diagram in term of average symbol power. c) Draw the decision regions assuming equally likely...
An 8-bit byte with binary value 10101111 is to be encoded. Draw the digital signals for using each of the NRZ, NRZ-I, Manchester, and differential Manchester digital encoding techniques. Assume the signal is “high” prior to receiving the first bit.
You will drive the digital display on the board. The control inputs to these digits are driven in parallel, but there are logic lines to select which one(s) you are controlling at a particular time. To display different numbers on each digit, you will need to loop over them, selecting one at a time, and asserting the control signals for that digit, then changing them to move on to the next. The LEDs in the displays are slow compared to...
A digital communication system uses the signals si(t) and s2(t) shown in Fig. 1 to t equally likely bits '0' and '1', respectively. The signaling duration is 4 seconds. The receiver uses a filter h(t) shown in Fig. 2 s1 (t) s2(t) 0 Figure 1: Set of signals in Problem 1 h(t) 0 Figure 2: h(t) in Problem 1 (a) Determine the parameter ri for this system. HINT: Remember that ri is equal to this convolution 81(t) * h(t) evaluated...
2. The decimal digits 0 to 9 are represented by four logic signals using the 7321 weighted BCD code. Only the code 0011 is used to represent the digit 3. In addition the code 1100 is used to represent the character E. Codes that do not represent either a decimal digit (including 0100), or the character E never occur. The logic signals are inputs to a decoder circuit whose outputs provide drive signals for a seven segment display system shown...
Question 1 Digital Electronics and Combinational Logic 1a) Analog and Digital Electronics i. Write either "digital" or "analog" in this to indicate whether the property in that row is - typical of digital electronics or analog electronics. The first row has been completed as an example. Property Digital/Analog Difficult, manual circuit design Analog Continuous valued signals Tolerant of electrical noise Circuit state tends to leak Intolerant of component variations ii. In older cars the timing of the electrical pulses to...