It is required to design a class B output stage to deliver an average power of 20 W to an 8-Ω loa...
2. Design an idealized class B output stage, as shown in Figure 2, to deliver an average of 25 W to an 82 speaker. The peak output voltage must be no larger than 80 percent of supply voltages Vcc. Determine: a) The required value of Voc b) The peak current in each transistor c) The power conversion efficiency V+ On Vo ap RL Figure 2
a) What is "power-conversion efficiency' of an output stage? Comparo the class-A and class-B amplifier output stages with rospect to their power-conversion officiencies. b) Assume that an emitter follower 9, is used as a class-A output stago, with the constant current supplied by another transistor 2. (as in Figure Q.4.a). Let Vcc=16V, 1 =100mA, and R=10002. If the output voltage is an 4-V-peak sinusoid, find the power conversion efficiency. VC Figure Q.4.a c) Explain the crossover distortion in a class-B...
a/ Determine the power supply VCC. b/ Find the peak output current Iom. c/ Find the power supplied by DC sources and the efficiency of the amplifier. d/ Find the maximum dissipated power on each transistor.
Class C power amplifier calculation (c) A Class C power amplifier shown in Figure-Q4 has a base bias voltage V" = -5V and Vcc = 30V. It is determined that a peak value of 9.8V at 1MHz is required to drive the transistor to its saturation current of 1.8A. Further let the ratio, peak value of the fundamental component to the peak value of the output waveform be approximated by (-0.0072贍+ 4.1e-3.54) × 10-3 where 0c is the conduction angle...
8.4 a) b) Please solve Test Your Understanding TYU 8.4 For the common-emitter output stage shown in Figure 8.16(a), let Vcc = 12 V and RL = 1 k12. Assume the transistor Q-point is in the center of the load line. (a) Determine the quiescent power dissipated in the transistor. (b) Assume the sinusoidal output voltage is limited to a 9V peak-to-peak value. Determine (i) the average signal power delivered to the load, (ii) the power conversion efficiency, and (iii)...
The last stage of operational Amplifier is a power amplifier. Class B is a good choice for the power amplifier. However, class B suffer from crossover distortion. Several methods are used to correct this non linearity as was discussed in the lecture (class AB). One of this method is the use of VBE multiplier. Design the output of an operational amplifier using class AB that employ VBE multiplier. For temperature stability RE can be used for the NPN and PNP...
Page 1. (a) Prove that if the voltage across a resistor Ri is a sine wave with amplitude Vcc, then the average power dissipated during one cycle is given by Vec/2R (b) A Class B BJT output stage is shown in Fig. I. Assume that Vout(t) = Vcc. sin wt; Voe >> VCE(oat); and . Also ignore any crossover distortion effects due to the deddband in the voltage transfer characteristic. Sketch the waveforms for lci(t), Ic2(t) and It(t). (c) Find...
Design a boost converter power stage to the following specification: Input voltage Output voltage: Output voltage ripple:max 20mV Load power: Switching frequency: 15kHz 110-125V 300V 1.5kW Calculate: (i) Maximum duty cycle (ii) Minimum duty cycle (iii) Average diode current (iv) Assuming the Rds(on) of the MOSFET is 0.01 Ω, and the diode forward voltage is 0.8V, calculate the approximate efficiency of the circuit. 2. A switching power supply shown in the circuit below has its switch driven by a signal...
Solve for the over-all Power Gain, Output Power, Quiescent Power, and Efficiency Vee 12V Qa 0, 0.22 pP 10 pF o Ln OkH 00 pF 33 Ω 2 W 100 pF 3 Class C(15pts) 2.1 For a class B amplifier providing a 20-V peak signal to a 16- ohm load (speaker) and a power supply of VCC 30 V, determine the A class C amplifier is driven by a 100 kHz signal. The transistor is on for 2 us, and...