Orthogonal-Transfer Charge-Coupled Devices and Low-Noise Charge-Coupled Devices Readout Circuits*. Barry E. Burke.
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Barry E. Burke
*The MIT Lincoln Laboratory portion of this work was performed under a Collaboration Agreement between MIT Lincoln Laboratory and The University of Hawaii, Institute for Astronomy (IfA). Opinions, interpretations, conclusions, and recommendations are those of the authors, and do not necessarily represent the view of the United States Government.
OTCCD can noiselessly compensate
for scene motion across sensor
during image integration
Application of OTCCDs in Astronomy
Star-cluster imagery (M71)
No motion compensation, =0.73"
With motion compensation, =0.50”
SNR increase: 1.7
array (64 CCDs)
telescope on Haleakala
2.38 arc min
OTA: 88 array of
with I/O control
150-mm wafer with
Photo of pixel array
Image from back-illuminated OTA
10-µm pixel, 22.6 Mpixels
Image from OTA cell with fixed
light spot and CCD gates clocked
Sense-node capacitance is lower (higher responsivity) for JFET than MOSFET
Noise spectral voltage is lower for JFET than MOSFET
2000-fps, 160160-pixel imager, 20 ports with JFET output circuits
Best MOSFET noise vs. preliminary JFET noise