1Gbit/s handheld file transfer system with optical wireless interface

Yazaki, Tomonori; Shibuya, Megumi; Tanaka, Hideaki; Usami, M.

doi:10.1109/leos.2006.278848

Cited by 2 publications

(2 citation statements)

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“…The AGC circuit provides dynamic adaptation of the transimpedance gain via control of the feedback resistor gate voltage. The transimpedance bandwidth is given by: BW 1+AI (1) TZ 2zR fC1 f Rtin where, AV is the low-frequency voltage amplifier gain, Rf is the feedback resistance value and Cin is the total capacitance at the input node including the photodiode capacitance.…”

Section: Front-end Preamplifier Design Implementationmentioning

confidence: 99%

“…The issue of broadband access is not unique to the "last-mile", but also for indoor, shortrange wireless local, personal, and body area networks (WLAN, WPAN, WBAN) where high-performance, computation-intensive mobile devices are reaching beyond GB capacity [ 1]. RF/microwave systems have several limitations to addressing this problem due to the expense of licensing and interference issues which are partly managed by spectrum regulation, but still lead to low data rates compared to optical fiber.…”

Section: Introductionmentioning

confidence: 99%

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On the Design of Low-Power Front-End Receiver Circuits for Broadband Optical Free-Space Links

Joyner

Harris

Sonkusale

2007

2007 IFIP International Conference on Wireless and Optical Communications Networks

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Optical wireless technology is emerging as a key broadband access technology for short-range, broadband wireless applications, offering several advantages over conventional RF systems in terms of connection speed, power efficiency, low transceiver complexity, networking security, and unregulated bandwidths in the THz range. This paper reviews design aspects of low-power, front-end optical wireless receiver circuits and presents a low-noise front-end preamplifier circuit implementing self-biased, automatic gain control and capable of integration with wide field of view detectors necessary for broadband optical wireless applications. The preamplifier is implemented in a low-cost commodity CMOS technology. For a gain variation of 38dB to 50dB, the front-end maintains a stable response and minimum 3dB bandwidth of 345MHz with a 6pF photodiode capacitance. The input-referred noise is 12.5pA/iHz at 350MHz.

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Section: Front-end Preamplifier Design Implementationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%