Questions & Answers of 555 Timers

Weightage of 555 Timers

Total 4 Questions have been asked from 555 Timers topic of Analog Circuits subject in previous GATE papers. Average marks 1.75.

In the astable multivibrator circuit shown in the figure, the frequency of oscillation (in kHz) at the output pin 3 is __________

 

In the following astable multivibrator circuit, which properties of vo(t) depend on R2?

An astable multivibrator circuit using IC 555 timer is shown below. Assume that the circuit is oscillating steadily

The voltage Vc across the capacitor varies between

Consider the Schmidt trigger circuit shown below.

A triangular wave which goes from -12 V to 12 V is applied to the inverting input of the OPAMP. Assume that the output of the OPAMP sings from +15 V to -15 V. The voltage at the non-inverting input switches between