Patent
Enhanced performance optical receiver having means for switching between high and low amplifier configurations
Reads0
Chats0
TLDR
In this paper, a transimpedance front end is provided for an optical receiver which includes a photodetector coupled optically to an optical fiber for receiving optical signals over the fiber and connected electrically to the front end.Abstract:
A transimpedance front end is provided for an optical receiver which includes a photodetector coupled optically to an optical fiber for receiving optical signals over the fiber and connected electrically to the front end. The front end comprises a buffer amplifier connected to the photodetector, a first amplifier selectively connected to the buffer through a first switch and through a first, high value feedback resistor in order to define a first mode low optical signal level amplifier configuration, a second amplifier selectively connected to the buffer through a second switch and through a second, switched low value resistor to define a second mode high optical signal level amplifier configuration, and an optical level sensing and switching control circuit connected to the photodetector for sensing incoming optical signal level and for switching between the first and second amplifier configurations as a function thereof.read more
Citations
More filters
Patent
Infrared wireless communication between electronic system components
TL;DR: In this article, a wireless infrared pulse-transmitting system for communication with electronic components is described, where the receiver for such a system has a radically reduced current and power values, which permit a battery-powered receiver to remain on while awaiting transmitter signals.
Patent
Impedance matched CMOS transimpedance amplifier for high-speed fiber optic communications
Todd M. Tanji,John J. Stronczer +1 more
TL;DR: In this article, a transimpedance amplifier for high-speed fiber optic communications is designed for high speed fiber optic communication. And the bias generator is used to bias the input and the second stage such that the input impedance substantially matches the output impedance for interfacing with a transmission line.
Patent
Wide dynamic range optical receivers
TL;DR: In this paper, a wide-dynamic range optical receiver amplifier is provided by using two separate amplifiers, one low-impedance input, low-noise, high-gain amplifier, preferably a transresistance amplifier.
Patent
Transimpedance amplifier for optical receiver
TL;DR: A transimpedance amplifier for an optical receiver as discussed by the authors includes an integrator circuit for receiving a current input from a photodetector, a gain stage responsive to the output of the integrated circuit for providing an output voltage representative of the current input to the integrator.
Patent
Optical transimpedance receiver with compensation network
TL;DR: In this paper, a photodetector, a transimpedance front end amplifier, and a non-linear feedback were used to improve the dynamic range of an optical transipedance receiver.
References
More filters
Patent
Low impedance automatic gain control circuit
TL;DR: In this paper, an optical receiver circuit for an incoming optical signal having a variable power level includes an optical detector for receiving the optical signal and generating a current therefrom which varies with the optical signals power level.
Patent
Fiber optic transimpedance receiver
TL;DR: A transimpedance receiver for broad band optical signals, such as carry multichannel CATV signals or broad band data over an optical fiber (14), which may vary in length (e.g. from 2 km to 20 km) may vary widely depending upon where the receiver (16) is installed in the fiber optic distribution system utilizes a broad band device, preferably a GASFET (26), the internal capacitance and gain of which enables amplification over the broad band frequency range without oscillation as discussed by the authors.
Patent
Preamplifier for an optical receiver
TL;DR: In this article, an optical high-impedance preamplifier for processing signals over a large dynamic and automatically operating control range is presented, where the automatic control is provided by a variable impedance which is arranged in series with the source circuit of a current-stabilized input MOSFET of the optical preamPLI.
Patent
A method and an arrangement for increasing the dynamic range at an input stage of an optical receiver
TL;DR: In this article, a method and arrangements for increasing the dynamic range at an input stage of an optical receiver, which input stage comprises a photodiode acting as a photodetector and an amplifying means the input of which is connected to one terminal of the photodode.
Patent
Receiver for optical digital signals having different amplitudes
TL;DR: In this paper, a transimpedance amplifier with a photodiode connected to its input produces an output that is supplied to one of the inputs of a comparator, which together with a resistor comprises a differentiator for the output signals.