•When the transistor is off the ramp voltage will disappear
because of the internal oscillator.
•After a pre-determined time, the FET will turn on again.
•In case of additional power requirements by the TV circuits,
instead of waiting for the internal Timing generator to turn on the
IC, we can refresh the IC.
•By raising pin1 above 2.0V and dropping it back to zero, on the
negative edge, the IC resets again and starts conduction.
•This is known as the Refresh Circuit
