Practice IC Fabrication Techniques - GATE & ESE

IC Fabrication Techniques

An Astable Multivibrator is modified as shown below:

Assuming the diodes are ideal, the upper and lower threshold voltages at which the Multivibrator changes its states are respectively

$\frac{2}{3} V_{C C},-\frac{2}{3} V_{C C}$

$\frac{1}{3} V_{C C},+\frac{2}{3} V_{C C}$

$\frac{2}{3} V_{C C},-\frac{1}{3} V_{C C}$

$\frac{1}{3} V_{C C},+\frac{1}{3} V_{C C}$