A circuit consists of a 48 volt battery at a telephone company central office which is connected to a twisted pair telephone line. At the other end of the line is a telephone handset with a resistance of 1000 ohms. The twisted pair has a loop resistance of 100 ohms per kilometer. (Loop resistance is the combined resistance
The DC input power, heat generation and maximum thermal resistance of class A and B amplifiers are calculated. We know that the AC output power is 200 Watts, and that the Class A and Class B amplifiers operate with the maximum theoretical efficiency. We also know that the BJT power transistor has a maximum junction temperature
a) Calculate the value of Output voltage at 50%
b) Draw a graph of the 'tapper' position, Vo.
c) Indicate on the graph the ideal characteristics of such a system.
d) Calculate the maximum error as a percentage of the true value.
e) Suggest how the system could be improved to give a characteristic closer to the idea
(a) A potential divider is to supply a voltage of 10 V, constant to better than 10%, into a load which can draw current up to a maximum of 50 mA. Design a potential divider for a 40 V battery (internal resistance 1 ohm) that would guarantee these conditions.
(b) Determine Thevenin's circuit for the circuit of (a)
Consider a series circuit containing a resistor of resistance R and a capacitor of capacitance C connected to a source of EMF E with negligible internal resistance. The wires are also assumed to have zero resistance. Initially, the switch is open and the capacitor discharged.
Let us try to understand the processes that take
A projectile is launched with an initial velocity of 2.8 m/s at an angle of 30 degrees above the ground. Assume there is no air resistance and that the acceleration due to gravity is g = 9.81 m/s^2. ??What is the maximum height the projectile will reach???
A simplified model of ADC noise refers the noise to a noisy input source resistance Rn while assuming the rest of the signal path to be noiseless. Attached Figure represents a particular 18-bit ADC that has a 10V input voltage range. The ADC has a bandwidth of 1 MHz. Calculate the maximum value of Rn if the resolution of the ADC