Quantum Dot Infrared Photodetector

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• Quantum Dot Infrared Photodetector
• Focal Plane Arrays
• The Direct Injection Readout Circuit
• 10/23/2006
• Eric Varley
• evarley_at_ece.unm.edu

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Detector Configuration
V_DETCOM
In Bump
Single Pixel Detector (Reverse Bias)
Array Pixel (Reverse Bias)
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Direct Injection
?
S/H
To MUX
Reset
Reset
C_S/H
DB V_DETCOM 5.5 DE(6_0)
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Direct Injection

• V_DETCOM 5.5
• Iph100pA
• Idk18pA
• Rdet2.2e9 O

Indigo Systems Application Note (1998), How to
Configure and Adjust the Detector Bias Circuit of
the ISC9705.
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Direct Injection

• Max Reverse Bias
• V_DETCOM (8.5) 5.5 DE(6_0) (.5) 3.5V
• Max Forward Bias
• V_DETCOM (5.5) 5.5 DE(6_0) (-.1) .1

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Spectral Data
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Direct Injection

• V_DETCOM 5.5
• Iph20pA 1000pA
• Idk18pA
• Rdet2.2e9 O

40-55mV change in bias for each decade increase
in photocurrent
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MOSFET
Neamen, Donald A. (2003). Semiconductor Physics
and Devices Basic Principles. New York The
McGraw-Hill Companies, Inc. Page 491.
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MOSFET Band Diagram
Threshold Inversion
Weak Inversion
Neamen, Donald A. (2003). Semiconductor Physics
and Devices Basic Principles. New York The
McGraw-Hill Companies, Inc. Page 456,524.
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Strong Inversion
Neamen, Donald A. (2003). Semiconductor Physics
and Devices Basic Principles. New York The
McGraw-Hill Companies, Inc. Page 524.
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Weak Inversion
VT.9v VD.1v T68K, 77K, 300K
R. Swanson and J.D. Meindl, Ion Implanted
Complementary MOS Transistors in Low-Voltage
Circuits, IEEE Journal of Solid-State Circuits
SC-7(2), 146-153 (Apr 1972)
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Weak Inversion
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Weak Inversion
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References
Questions?

• Indigo Systems Application Note (1998), How to
  Configure and Adjust the Detector Bias Circuit if
  the ISC9705.
• Neamen, Donald A. (2003). Semiconductor Physics
  and Devices Basic Principles. New York The
  McGraw-Hill Companies, Inc. Page 456, 491, 524.
• R. Swanson and J.D. Meindl, Ion Implanted
  Complementary MOS Transistors in Low-Voltage
  Circuits, IEEE Journal of Solid-State Circuits
  SC-7(2), 146-153 (Apr 1972)