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Proceedings Paper

Design and implementation of fast bipolar clock drivers for CCD imaging systems in space applications
Author(s): Jayesh Jayarajan; Nishant Kumar; Amarnath Verma; Ramkrishna Thaker
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Paper Abstract

Drive electronics for generating fast, bipolar clocks, which can drive capacitive loads of the order of 5-10nF are indispensable for present day Charge Coupled Devices (CCDs). Design of these high speed bipolar clocks is challenging because of the capacitive loads that have to be driven and a strict constraint on the rise and fall times. Designing drive electronics circuits for space applications becomes even more challenging due to limited number of available discrete devices, which can survive in the harsh radiation prone space environment. This paper presents the design, simulations and test results of a set of such high speed, bipolar clock drivers. The design has been tested under a thermal cycle of -15 deg C to +55 deg C under vacuum conditions and has been designed using radiation hardened components. The test results show that the design meets the stringent rise/fall time requirements of 50±10ns for Multiple Vertical CCD (VCCD) clocks and 20±5ns for Horizontal CCD (HCCD) clocks with sufficient design margins across full temperature range, with a pixel readout rate of 6.6MHz. The full design has been realized in flexi-rigid PCB with package volume of 140x160x50 mm3.

Paper Details

Date Published: 2 May 2016
PDF: 8 pages
Proc. SPIE 9881, Earth Observing Missions and Sensors: Development, Implementation, and Characterization IV, 988128 (2 May 2016); doi: 10.1117/12.2223730
Show Author Affiliations
Jayesh Jayarajan, Space Applications Ctr. (India)
Nishant Kumar, Space Applications Ctr. (India)
Amarnath Verma, Space Applications Ctr. (India)
Ramkrishna Thaker, Space Applications Ctr. (India)

Published in SPIE Proceedings Vol. 9881:
Earth Observing Missions and Sensors: Development, Implementation, and Characterization IV
Xiaoxiong J. Xiong; Saji Abraham Kuriakose; Toshiyoshi Kimura, Editor(s)

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