Miscellaneous Practice Questions

Two monoshot multivibrators, one positive edge triggered $(M_{1})$ and another negative edge triggered $(M_{2})$ , are connected as shown in figure The monoshots $(M_{1})$ and $(M_{2})$ when triggered produce pulses of width $(T_{1})$ and $(T_{2})$ respectively, where $(T_{1} \gt T_2)$ . The steady state output voltage $(v_{o})$ of the circuit is

The following circuit has a source voltage $V_s$ as shown in the graph. The current through the circuit is also shown. The element connected between a and b could be

The truth table of monoshot shown in the figure is given in the table below : Two monoshots, one positive edge triggered and other negative edge triggered, are connected shown in the figure, The pulse widths of the two monoshot outputs $Q_1 \; and \; Q_2$ are $T_{ON1}$ and $T_{ON2}$ respectively. The frequency and the duty cycle of the signal at $Q_1$ will respectively be

IC 555 in the adjacent figure is configured as an astable multi-vibrator. It is enabled to to oscillate at t=0 by applying a high input to pin 4. The pin description is : 1 and 8-supply; 2-trigger; 4-reset; 6-threshold 7-discharge. The waveform appearing across the capacitor starting from t=0, as observed on a storage CRO is

The input signal $v_{\in}$ shown in the figure is a 1 kHz square wave voltage that alternates between +7 V and -7 V with a 50% duty cycle. Both transistor have the same current gain which is large. The circuit delivers power to the load resistor $R_{L}$ . What is the efficiency of this circuit for the given input ? choose the closest answer.

In the Schmitt trigger circuit shown in figure, if $V_{CE\left ( sat \right )}$ = 0.1V, the output logic low level ( $V_{OL}$ ) is

The circuit of figure shows a 555 Timer IC connected as an astable multivibrator. The value of the capacitor C is 10 nF. The values of the resistors $R_A \; and \; R_B$ for a frequency of 10 kHz and a duty cycle of 0.75 for the output voltage waveform are