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Is it possible to model a photodiode PIN InGasAS,in MicroCAP 12 or LTspice?

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Weiiseste:
Or. How can it be better for this situation?

Jay_Diddy_B:

--- Quote from: Weiiseste on June 28, 2020, 01:52:35 pm ---Or. How can it be better for this situation?

--- End quote ---

Are you sure that the power level is 10 Micro Watts per metre2

10E-6 m2 ?

Moonlight is about 600uW m2 (Full Moon)

It is is tough to measure 78pA at DC

If you increase the area of the sensor you will get more current, but you get more capacitance.
You also have to consider dark current and noise.

Regards,
Jay_Diddy_B

Weiiseste:
Okay. Which are your advice?. What considerations must I take?. To be better. :)

StillTrying:

--- Quote from: Weiiseste on June 28, 2020, 01:52:35 pm ---Or. How can it be better for this situation?
--- End quote ---

You could give us some clue of the arrangement of the IR emitter and photodiode.

The 1st post says "a transimpedance amplifier with photodiode, used like receiver of smoke.".
If it's anything like these to detect the light scattered off smoke the photo currents will be at the very low end and the amp a high gain low bandwidth, probably an op amp.

www.safelincs.co.uk/smoke-alarm-types-optical-alarms-overview/
www.mavili.com.tr/en/smoke-detectors/1179-how-optical-smoke-detectors-work.html

Weiiseste:
Photo sensing circuits such as transimpedance amplifiers (TIAs) are useful in precision systems such as computed tomography (CT) scanners, blood analyzers, and smoke detectors.My circuit has the rooll to detect the smoke, for grenades.

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