2. Design an idealized class B output stage, as shown in Figure 2, to deliver an...
It is required to design a class B output stage to deliver an average power of 20 W to an 8-Ω load. The power supply is to be selected such that Vcc is about 5 V greater than the peak output voltage. This avoids transistor saturation and the associated nonlinear distortion, and allows for including short-circuit protection circuitry. (The latter will be discussed in Section 12.6.) Determine the supply voltage required the peak current drawn from each supply, the total...
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...
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)...
2. Consider a class B BJT output stage with a square wave output voltage of amplitude Vo across a load Ri. and employing power supplies Vss. Neglecting the effects of finite VBE and VCEs (i.e., assume both VBE and VcEsat are negligible small) determine the load power, the supply power, the power conversion efficiency, the maximum attainable power conversion efficiency and the corresponding value of Vo.
2. Consider a class B BJT output stage with a square wave output voltage...
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...
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.
THE STEPS TO DO SO:
Design a BJT amplifier based on the specifications provided in the table below. Your design should be insensitive to β variations, and both the input and the output should be AC coupled as in Fig. 1. Supply Voltage, Vcc Load Resistance, RL Transistor's Current Gain, β Relative Variation of lc for VBE-0.7 ± 0.1 V 0-to-Peak Output Swing, Vo Voltage Gain, A Input Resistance, R THD for 5kHz IV (0-to-peak) Sine Wave Output Voltage, V。S5%...
12.12 Consider the complementary-BJT class B output stage and neglect the effects of finite Vgf and VCEstFor t10-V power supplies and an 8-S2 load resistance, what is the maximum sine-wave output power available? What supply power corresponds? What is the power-conversion efficiency? For output signals of half this amplitude, find the output power, the supply power, and the power-conversion efficiency
Q2. Calculate the power efficiency and power dissipation Pp of each transistor in the complementary class B push-pull output stage in Figure 2 ir Vcc 12V and R = 5022. The parameters of the transistors are Bp=hje = 100, VCE(sat) = 0.2V and VBE = 0.7V. (5 Points) BRL VO Floure
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...