For the circuit shown below each diode has Vγ = 0.6 Vthen both diode will be ON if(a) v s > 3.9 V(b) v s > 4.9 V(c) v s > 6.3 V(d) v s > 5.3 V

To determine when both diodes will be ON in the given circuit, we need to compare the input voltage (v_s) with the threshold voltage (Vγ) of the diodes.

The threshold voltage (Vγ) is given as 0.6 V for each diode.

(a) For both diodes to be ON, v_s must be greater than the sum of the threshold voltages of the diodes. Therefore, v_s > 2 * Vγ = 2 * 0.6 V = 1.2 V.

(b) Similarly, for both diodes to be ON, v_s must be greater than 2 * Vγ = 2 * 0.6 V = 1.2 V.

(c) For both diodes to be ON, v_s must be greater than 2 * Vγ = 2 * 0.6 V = 1.2 V.

(d) For both diodes to be ON, v_s must be greater than 2 * Vγ = 2 * 0.6 V = 1.2 V.

Therefore, the correct answer is (a) v_s > 3.9 V.