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Entry  Wed Jun 18 18:16:26 2014, Nichin, Update, Electronics, Changes to the PD frequency response measurement system  
    Reply  Wed Jun 18 21:53:48 2014, Koji, Update, Electronics, Changes to the PD frequency response measurement system  
Message ID: 10065     Entry time: Wed Jun 18 21:53:48 2014     In reply to: 10062
Author: Koji 
Type: Update 
Category: Electronics 
Subject: Changes to the PD frequency response measurement system  

Not "hot" current but "photo" current. Is this my bad!?

It was me who told Nichin that the DC transimpedance was 200Ohm. But according to this entry I checked the RF transimpedance of AS55 before.
In my code, the DC transimpedance was defined to be 50Ohm. If we believe it, 30mV corresponds to 0.6mA.

Quote:

The multimeter readout 30mV finally. Taking the transimpedence as 200ohm approx., the hot current is about 1.5mA.

 

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