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 Thu May 20 17:03:50 2021, Koji, General, General, SRS LCR meter SRS720 borrowed from Downs 
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 Sun May 30 15:17:16 2021, Koji, General, General, DCPD AF capacitance measirement
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Sun May 30 15:32:56 2021, Koji, General, General, DCPD AF capacitance measirement
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Message ID: 409
Entry time: Sun May 30 15:17:16 2021
In reply to: 408
Reply to this: 410
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| Author: |
Koji |
| Type: |
General |
| Category: |
General |
| Subject: |
DCPD AF capacitance measirement |
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Attachment 1: System diagram. The reverse bias voltage is controlled by DS335. This can produce a voltage offset up to 10V. A G=+2 opamp circuit was inserted so that a bias of up to +15V can be produced. The capacitances of the photodiodes were measured with SR720 LCR meter with a probe. DS335 and SR720 were controlled from PC/Mac via serial connections.
Attachment 2: Overview
Attachment 3: How was the probe attached to the photodiode under the test
Attachment 4: The bias circuitry and the power supply
Attachment 5: G=+2 amp |
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