I understand the working of the circuit, a Voltage Control Oscillator, except the part where the inverted square wave from the Schmitt Trigger gets fed to the Constant current source/sink. Pins 5 and 6 are maintained at the same voltage so when the modulation i/p voltage is increased, the pin 6 voltage also increases => Constant current decreases => Decreasing charging current for capacitor => A longer charging time => Wider pulses.
I'd appreciate it if anyone could hazard a guess about the Schmitt trigger feedback to the Current source/sink.
