Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Slope control of leading or trailing edge of rectangular or...
Patent
1998-08-18
2000-11-14
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Slope control of leading or trailing edge of rectangular or...
327134, 327178, H03K 512
Patent
active
061475335
ABSTRACT:
A data communication receiving element includes a photo-receiving element for receiving an external light signal and for converting the light signal to a current signal. It further includes an amplifier circuit for amplifying the current signal after converting the current signal to a voltage signal. A waveform shaping circuit is included for shaping an output voltage waveform from the amplifier circuit to a substantially square pulse. Finally, an integrator is included for converting the substantially square pulse to a non-square pulse. This is achieved by extending a rising time necessary for shifting the substantially square pulse from a low potential level to a high potential level, and by extending a falling time necessary for shifting the substantially square pulse from the high potential level to the low potential level. As such, deterioration of an S/N ratio is suppressed.
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Nakamura Fumitaka
Okuda Takanori
Shimizu Takayuki
Yokogawa Naruichi
Callahan Timothy P.
Luu An T.
Sharp Kabushiki Kaisha
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