2. A transformer-coupled class A amplifier drives an 8-ohm speaker through a 4:1 transformer. Using a power supply of Vcc = 36 V, the circuit delivers 3 W to the load. a. Calculate the following: i. Plac) across transformer primary. ii. Vlac)- iii. Vjac) at transformer primary. iv. The rms values of load and primary current. b. Draw the circuit diagram of a class A transformer-coupled amplifier using an npn transistor.

2. A transformer-coupled class A amplifier drives an 8-ohm speaker through a 4:1 transformer. Using a power supply of Vcc = 36 V, the circuit delivers 3 W to the load. a. Calculate the following: i. Plac) across transformer primary. ii. Vlac)- iii. Vjac) at transformer primary. iv. The rms values of load and primary current. b. Draw the circuit diagram of a class A transformer-coupled amplifier using an npn transistor.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

2. An RLC circuit is connected across a variable frequency, 110-volt source. When the frequency is varied, the maximum effective (rms) value of the current is 5.6 A and occurs at 45 Hz frequency. At this frequency, the voltage across the capacitor is 200.8 volts. Determine the power factor of the circuit at 60 Hz.
design 800v to 14.5v isolated bi-directional dcdc conveter a. choose the converter type with reason b. design each components with safety margin 30% (equations) c. calculate the efficiency (equations)
In this voltage divider bias circuit, the input is at the base. Output is at the emitter with a high input resistance and low output resistance. The maximum voltage gain is 1 and the coupling capacitors must have a negligible reactance at the frequency of operation. (use to answer a and b) a. Derive the expression for the voltage gain, current gain, and power gain in terms of power delivered to the load, R. b. Sketch both the DC and AC equivalent circuits. c. Derive the expression for ripple factor of Half Wave Rectification with a capacitor filter.
Construct the circuit in Figure 1 in the Circuit JS simulator. Note that the voltage source is given in RMS. Within Circuit JS while defining the max voltage of the voltage source include “rms” after the number to tell Circuit JS that this is a rms value. Also note that there are additional parameters when instantiating a transformer in Circuit JS. Leave these at the default values. Additionally, transformers may have problems simulating in Circuit JS. Answer the following: 1. From the simulation results, determine the power dissipated in R2 and compare to the expected value from the previous section.2. Change the transformer ratio (“Ratio” as a fraction when you “Edit…” the transformer component) to the value calculated in the previous section to provide maximum power transfer in R2. Note: In Circuit JS, Transformer Ratio = Primary/Secondary.3. Rerun the simulation, calculate the power dissipated in R2 and compare to the expected value from the previous section.4. Change the…
4.) A transformer has a primary coil with 300 windings, and secondary coil has 400 windings. The input AC power supply is 120 volts (Vrms). A) Is this a step-up or step-down transformer? B) What is the rms voltage across the output terminals (Vrms)? C) What is the peak voltage across the output terminals (Vmax)? Primary Secondary imm ac input
A three-phase 1MW AC-DC converter is to be connected to a 2.4kVLL/60Hz AC bus that presents a 200uH inductance per phase. What is the maximum magnitude, in Arms, that the 13th current harmonic of the converter can have, in order to comply with the IEEE 519 standard?
Question 1 (continued) (f) Figure 5 shows a basic shunt feedback transistor bias circuit. RL Rg Figure 5 (i) What voltage would you expect for VCE if RB is reduced to 0 ohms? (ii) Would you expect any component damage to occur under (i)? (g) Determine the peak inter-phase voltage of a prototype 3-phase, star-connected, transformer when the r.m.s ac voltage between phase and neutral is 300 V. VBE-
A buck-boost converter operates with an input battery. It converts +12 V to –12 V at apower level of about 75 W. the switching frequency is 120 kHz. The switches have200 ns switching time. The battery has an internal series resistance of 0.2  and seriesinductance of 200 nH. (a) What is the operating value of the duty ratio? What power is lost in the battery resistance? (b) Propose an interface structure to improve operation and decrease losses. What are the duty ratio and battery resistance loss with your interface in place?
An ideal boost converter is required to have a constant output voltage of 12 V at 24 W load.The input voltage varies from 2.7 to 4.5 V (as in a battery cell). Select a switching frequency of100 kHz. The value of the inductance in the boost converter is 2.2 uH. Determine:(a) The range of duty cycle that the converter will operate with (hint: mode?), and(b) The minimum value of the output capacitance such that the pk-to-pk load voltage rippleis less than 2%.
Consider a step down converter supplied by a DC power source of magnitude Vs = 220 V. The switching period is 0.1 ms and the duty cycle k is set to 0.5. The load is an inductive load with R=5 Ohms and L=10 mH. The switch is ideal. The RMS converter current IR is equal to 15.56A. The ripple factor of the input current RFs would be equal to: Select one: a. 0% Ob. 50% Oc. 100% d. None of these
Three Phase Semi Converter When Highly Inductive Load Connected: Please derive the following equations for continuous conduction, Thanks :-)
4) A single-phase full-wave AC voltage controller consists of two SCRs connected in invers-parallel. The supply voltage is 220V at 50Hz. The controller is used to control heater element of 2500W in an electric oven. The trigger angle is 30o. i) Draw the circuit diagram ii) sketch compatible waveforms for the supply, load and SCR voltages. iii) calculate the rms value of the load voltage and current. iv) Determine the input power factor of the circuit. v) Calculate the average value of the SCR current.