Question

Please use KVL, and not skip any step! thanks. Part a ) theres 4 possible cases

The diodes in the below circuit have Vpo = 0.7 V, and Vz = 3 V. a) Write the possible cases of the operation of the diodes. b) For each case, include the calculation of finding the relationship between v, and Vị and the range of vi. c) Sketch the output signal when Vi = 3 sin (wt). You do not need to label the time axis. Show your work. 1k12 + D1 1k12 3 Ý Vi Vo D2

Answer 1

( Sol. When input voltage is greater than 0.7 volts then both diode and Zener diode will be forward biased and the Circut can be as follows, drawn I ww ot O.IMA IK2 To.tv V: Vo A Fo-TV Apply KVL to First Loop + IX Clk) to = 6 Vo = Vi - Txik Apply KVL to Loop - 0.7 -0.7 to so Vo=1.4 Volts Case (ii) When the input is lesser than 0.7volts then DI Reveruse biased when input D₂ - Reverse biased It will be ON Votfuge is esual to 3r. Because of break down.

When input is Lesser than 0.7volts the cruit looks as follows ler wa t Vo No=0 = 0 volts. ܩܠܵܐ ve 어 D- enters into > break-down begion If Zener diode . ike ot t ike vo 3V Vo = -3+ Ixlk © If Vin = 3 Sirfut) V = 3 3 ht -3 Vo 1. Avok D-OFF DI-ON D-ON D2-OFF NOTE D' Off because the input voltage is not exceeded 3 volts.