لخّصلي

When the supply power is first turned on, Vcap is 0 V, so Vout will be HIGH • The capacitor will start charging toward the 5 V at Vout. • When Vcap reaches the positive-going threshold (VT+ ) of the Schmitt trigger, the output of the Schmitt will change to a LOW ( ~ 0V) • Now, with (Vout ~ 0) the capacitor will start discharging toward 0 V. • When Vcap drops below the negative-going threshold (VT- ) the output of the Schmitt will change back to a HIGH. • The cycle repeats now, with the capacitor charging back up (VT+ ) to then down to (VT- ) then up to (VT+ ) and so on. • The waveform at Vout will be a square wave oscillating between VOH and VOL, as shown

When the supply power is first turned on, Vcap is 0 V, so
Vout will be HIGH
• The capacitor will start charging toward the 5 V at Vout.
• When Vcap reaches the positive-going threshold (VT+ ) of
the Schmitt trigger, the output of the Schmitt will change to a
LOW ( ~ 0V)
• Now, with (Vout ~ 0) the capacitor will start discharging
toward 0 V.
• When Vcap drops below the negative-going threshold (VT- )
the output of the Schmitt will change back to a HIGH.
• The cycle repeats now, with the capacitor charging back up
(VT+ ) to then down to (VT- ) then up to (VT+ ) and so on.
• The waveform at Vout will be a square wave oscillating
between VOH and VOL, as shown