QuickStrike
New Member
The figure below shows a simple infrared detector circuit.
The response time for a photodiode (T=0.35/2.19RC) is responsible for the fast signal response.
As u can see the formula, if resistance or capacitance or both are made or chosen to be small then the response time will be small (i.e. a fast response time).
Is there any way to reduce the capacitance of the photodiode besides biasing it (when a voltage is applied to the photodiode, capacitance is reduced). i.e. is there some component that I can connect to the circuit shown below to reduce the capacitance, to acquire a fast response time? Maybe connect a capacitor somewhere!!
The response time for a photodiode (T=0.35/2.19RC) is responsible for the fast signal response.
As u can see the formula, if resistance or capacitance or both are made or chosen to be small then the response time will be small (i.e. a fast response time).
Is there any way to reduce the capacitance of the photodiode besides biasing it (when a voltage is applied to the photodiode, capacitance is reduced). i.e. is there some component that I can connect to the circuit shown below to reduce the capacitance, to acquire a fast response time? Maybe connect a capacitor somewhere!!