Home /
Expert Answers /
Electrical Engineering /
do-not-copy-existing-answers-from-chegg-in-the-following-circuit-the-transformer-has-an-into-of-pa225

Do not copy existing answers from chegg.

In the following circuit the transformer has an into of \( 120 \mathrm{Vrms} \) and a turns ratio of \( 10: 1 \). Diode forward voltage is \( 0.7 \mathrm{~V} \). The desired output is \( 5 \mathrm{~V} \mathrm{DC} \). a) Sketch the waveform seen at points A, B (with and without capacitor) and C in the circuit for 2 periods of the input, Vs. Mark the expected V max and indicate the time scale in terms of the period of the input, Ts. b) On the graph for point B (without capacitor) indicate the time when the diode, DI, is conducting or 'on". c) The zener diode (D2) has a Vzo of \( 4.9 \) and an \( r_{z} \) value of \( 5 \mathrm{Ohm} \). We would like to source \( 25 \mathrm{~mA} \) to a load at exactly \( 5 \mathrm{~V} \). What load resistance must we use, what zener current, I, will give us the \( 5 \mathrm{~V} \) needed and finally what \( \mathrm{R} \) value will satisfy these requirements. (Remember to account for the voltage drop across DI and assume \( \mathrm{V} \) ripple \( =0 \) ). d) We would like to reduce the ripple voltage to less than \( 50 \mathrm{~m} \mathrm{~V} \). What capacitance should we chose to meet this requirement? e) What is the load regulation and line regulation of the circuit?

the total losses in a transformer