Electronics > Projects, Designs, and Technical Stuff
Is it possible to model a photodiode PIN InGasAS,in MicroCAP 12 or LTspice?
Weiseste:
Thank you for feedback.What program do you use?And my question it is about if it possible to model a InGasAs panchromatic PIN photodiode, in accord with datasheet, in simulator SPICE MicroCAP 12 or in program LTspice.I want to monitor graphically the impulse of photodiode in function of output of transimpedance for sensibilty,the form it must be, an optical rectangular impulse, atthe input of photodiode, and that signal I wnat to monitor with the signal output ofg transimpedance amplifier.
At the third pin of photodiode, a voltage source in impuls.And this is the results graphically.
Marco:
The photodiode model seems fine, but the simulator seems to say your amplifier oscillates and has a weird delay (presumably it's saturating somewhere, reduce the input signal).
Jay_Diddy_B:
Hi,
Using the information found here:
https://www.lasercomponents.com/fileadmin/user_upload/home/Datasheets/lc/kataloge/ir_components.pdf
And modeling:
Quantum Efficiency
Non Linearity
These were modelled with polynomials obtained by curve fitting the datasheet.
LTspice Model
Voltage source V1 is the optical power that falls on the photodiode. The scaling is 1V represents 1W.
There are parameters for wavelength and Junction Capacitance.
and I get the following result:
The LTspice model is attached.
Regards,
Jay_Diddy_B
PD Model.asc (3.48 kB - downloaded 233 times.)
Jay_Diddy_B:
Hi,
These are the curves used:
and
Regards,
Jay_Diddy_B
Weiseste:
Thank you for this feedback.Can you help me please to integreat that model of photodiode in th electrical schematic.I want to monitor graphically the impulse of photodiode in function of output of transimpedance for sensibilty,the form it must be, an optical rectangular impulse, at the input of photodiode, with a perioad of 20ns and , the interval of voltage must be between -20V and +20V, and the optical power must be between 100 and 100mW/cm^2.
Thank you.
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