Q2: An amplifier operating from t 15-V power supplies is fed with a sinusoidal voltage having 1 V peak and delivers a s...
An amplifier operating from ±5 V supplies provides a 3 V peak sine wave across a 30 Ω load when provided with a 20 mV peak input from which 20 μA peak is drawn. The average current in each supply is measured to be 50 mA. Find the voltage gain, current gain, and power gain expressed as ratios, and the amplifier efficiency.
We have an amplifier that draws 2A from a 15-V dc power supply. The input signal current is 1mA rms, and the input resistance is 2 k ohm. The amplifier delivers 12V rms to an 8 ohm load. Determine the power dissipated in the amplifier and the efficiency of the amplifier.
A 1V peak input sine wave is amplified to 9V peak across a 1kW load. The input current of the amplifier is a sine wave of 0.1 mA peak. The amplifier draws 9.5 mA from each of its +/- 10 V DC power supplies. Find h, the efficiency of the amplifier.
A sinusoidal ac voltage source with a peak voltage of 28.3 V is connected across a pure resistive load. Choose the best answer for the dc voltage resulting in the same average power dissipated in the load? A) 28.3V B) 56.6 V C) 20 V D) 10 V
1. An amplifier has a voltage gain Av equal to 20. An input voltage v of 150 mVs applied to the input of the amplifier. What is the output voltage vo? Rs 2. For the amplifier in Problem 3, assume the input current i is 2 mA, and the output current io is 10 mA. What is the current gain A, ? Assuming the amplifier as described above has an output resistance is 0 ohms, what is the load resistance...
rer ab sa power originale! 2.59 An op-amp voltage follower is powered by £10-V power supplies. The input is driven by a 5-V dc voltage source and the output feeds a 200-12 resistive load R. With R disconnected, the current Ip flowing from the positive supply into the op-amp equals the current In flowing from the op-amp into negative supply. (a) What is the difference between Ip and In with the load connected? (b) Compute the total power drawn from...
Question 3 (10 marks) Calculate the input power , the output power and the efficiency of the amplifier circuit shown in Fig.(3) for an input voltage that results in a base current of 10 mA peak to peak. ㄟˇㄟ Fig. (3) 25 Question 3 (10 marks) Calculate the input power , the output power and the efficiency of the amplifier circuit shown in Fig.(3) for an input voltage that results in a base current of 10 mA peak to peak....
The balanced positive and negative DC power supplies of an ideal class AB amplifier are set at Vcc = +18 volts and Vss=-18 volts. For a sinusodal input signal that results in maximum sinusoidal output voltage across the resistive load RL = 30.0 ohms, the average power dissipated by the resistive load RL is determined as nearest to which of the following answers:- O 1.2 watts 3.8 watts O 5.4 watts O 11.25 watts 13.1 watts
QUESTION 12 To improve the efficiency of an amplifier, you have to a reduce load power b. increase supply current OC. reduce supply voltage od decrease unwanted power losses QUESTION 13 If the output of a transistor amplifier is 5 V rms and the input is 100 mVrms the voltage gain is O as w 6.500 O c 50 d. 100 QUESTION 14 If the DC current gain of a certain transistor operating in the linear region is 30 and...
Voltage amplifiers are available with Avoc= 8V/V, Rin = 1.8kOhms, Ro=850 Ohms. With a 12 V DC power source, each amplifier consumes 1.5 mA average current. a. How many amplifiers do you need to cascade to get at least a 1000 voltage gain with a load resistance of 1.0 kΩ? b. What is the voltage gain Av obtained? (Respond with a rounded whole number) c.For the cascade connection, find the open circuit voltage gain. d. If you have a 1.5...