I am wanting to desing a new DCO. I am trying to understand/calculate how long the capacitor C9 will take to discharge to 0V . The integrator produces a negative ramp up to a maximum of around -4.5V, a pulse width then switches the FET (j201), which discharges the C9. However the length that it takes is important, as the pulse width must have the same time. thank you in advance

According to the multisim simulation, the capacitor discharges in 3.4us. So I am looking for a similar calculated value

According to the multisim simulation, the capacitor discharges in 3.4us. So I am looking for a similar calculated value

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