Bandwidth of Integrated Photodiodes in Standard CMOS for CD/DVD application


Radovanović, S. and Annema, A.-J. and Nauta, B. (2005) Bandwidth of Integrated Photodiodes in Standard CMOS for CD/DVD application. Journal of Microelectronics Reliability, 45 (3-4). pp. 705-710. ISSN 0026-2714

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Abstract:his paper analyzes the bandwidth of high-speed photodiodes in a fully standard 0.18 μm CMOS technology for the CD/DVD optical pick-up units. Three diode structures are investigated: nwell/p-substrate, p+/nwell/p-substrate and p+/nwell. The photodiode performances are compared for λ = 780 nm and λ = 650 nm wavelength, corresponding to the lasers for CD and DVD, respectively. Slow substrate photocurrent component limits the bandwidth of nwell/p-substrate and p+/nwell/p-substrate photodiodes to 6 MHz and 7 MHz for a CD application as well as 70 MHz and 100 MHz for a DVD application. The third analyzed photodiode has bandwidth in the low GHz range for both applications, with the cost of at least 12 dB lower responsivity.
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Copyright:© 2005 Elsevier
Electrical Engineering, Mathematics and Computer Science (EEMCS)
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