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The Voltage Source Inverter $(VSI)$ shown in the figure below is switched to provide a $50 Hz$, square-wave ac output voltage $(vo)$ across an $R-L$ load. Reference polarity of $vo$ and reference direction of the output current $i_o$ are indicated in the figure. It is given that $R = 3\: \Omega$, $L = 9.55 \:mH$

In the interval when $v_0< 0$ and $i_0> 0$ the pair of devices which conducts the load current is

  1. $Q1, Q2$
  2. $Q3, Q4$
  3. $D1, D2$
  4. $D3, D4$
in Analog and Digital Electronics by (1.5k points)
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