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8160457 |
PIN/TIA system for use in FTTx applications
A system is disclosed for an improved ROSA that has increased sensitivity for permitting greater numbers of ONTs to be connected to an optical network per defined transmission line distances. The...
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8153953 |
Light receiving circuit
A light receiving circuit includes: a transimpedance amplifier circuit which is connected to a light receiving element; a differential amplifier which operates by a predetermined current supplied...
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8143564 |
Photodetection circuit
This photodetecting circuit 1 is capable of suppressing oscillation of an output, and operates as a zero bias circuit in a case of a small photoelectric current to an extent that a dark current is...
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8139957 |
High sensitivity optical receiver employing a high gain amplifier and an equalizing circuit
An optical receiver includes a light receiving element for converting an optical signal to an electrical signal having a first bandwidth and an amplifier for amplifying the electrical signal. The...
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8121495 |
Current mirror circuit and optical receiver circuit using the same
A current mirror circuit and an optical receiver circuit implementing with the current mirror circuit are disclosed. The current mirror circuit provides two MOSFETs and two differential amplifiers....
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8055138 |
Photosensor operating point
The subject matter disclosed herein relates to determining a photosensor operating point.
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8053717 |
Photoelectric conversion device having a reference voltage generation circuit with a resistor and a second diode element and electronic device having the same
The photoelectric conversion device includes a photoelectric conversion circuit for outputting photocurrent generated in a photoelectric conversion element as output voltage subjected to...
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8039782 |
Optical sensor device and electronic apparatus with an amplifier circuit and dual level shift circuit
In an optical sensor device employing an amorphous silicon photodiode, an external amplifier IC and the like are required due to low current capacity of the sensor element in order to improve the...
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7989753 |
Photodetector having wide dynamic range and low temperature dependence
A photodetector of a wide dynamic range of incident light amount detection and low temperature dependence is provided. A first signal processing unit 10m,n includes an integrating circuit 11, a...
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7968835 |
Electronic device having LED with variable brightness
Various embodiments of a light on an electronic device are disclosed. In one embodiment, the light couples to a sensor and has a brightness that varies when ambient light incident on the sensor...
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7970291 |
Optical-receiving apparatus and bias-voltage-control method used for the optical-receiving apparatus
According to an optical-receiving apparatus including an APD converting input light into an electric signal and a bias-voltage-control method used for the optical-receiving apparatus, a...
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7822349 |
Digital iterative gain control
In an IR communication network, a method is described to optimize channel performance in the presence of strong and varying IR interference. The method controls of the channel gain based on...
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7783205 |
Learning infrared amplifier for remote control devices
A learning remote “learns” both a digital code carried by an infrared operational signal as well as a timing characteristic (for example, time period) of a carrier used to modulate the ope...
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7755831 |
Night vision glasses
Image-intensifying glasses 100 that are suitable for certain commercial and entertainment applications by virtue of their light weight, small size, and economical production, compared to certain...
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7728274 |
Imaging system with negative electron affinity photocathode
A viewing system configured to combine multiple spectral images of a scene, the system includes a spectral beam separator configured to split an incoming beam of radiation into a first and a second...
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7723667 |
Phototransistor with source layer between barrier layer and photosensitive semiconductor layer and a gate layer for controlling the barrier height of the barrier layer
A photo transistor has an active region spaced from a source by barrier. A drain is laterally spaced from the active region. Light incident on the active region creates electron-hole pairs. Holes...
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7714267 |
Intensity detector circuitry using a cascade of gain elements
A system is described that may determine an intensity measure. In certain example embodiments, a system may include circuitry for receiving and circuitry for assessing. The circuitry for receiving...
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7676152 |
Optical power monitor for PON telecommunication
In an optical telecommunication system in which an intensity of an arriving optical signal is different for each packet, detected is an optical intensity for each packet with little error. For this...
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7657191 |
Variable bandwidth transimpedance amplifier with one-wire interface
A bandwidth adjustable transimpedance amplifier. The bandwidth adjustable transimpedance amplifier includes a feedback path with a selectable resistance. The bandwidth adjustable transimpedance...
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7620330 |
Optical receiver device and method
An optoelectronic device has a bright detector and a dark detector and reduces noise in the output of the bright detector using the output of the dark detector.
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7509052 |
Optical receiver, optical transmitter and optical transceiver
An optical receiver includes a first light receiving element to convert an optical signal to an electric signal and to output the electric signal from one end. A light receiving element row is...
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7470885 |
Photodetector-amplifier circuit and optical pickup device
The present invention provides a photodetector-amplifier circuit capable of eliminating an influence of noise due to stray light entering a non-selected photodetector to stably select and switch a...
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7460792 |
Receiving circuit and electronic apparatus for optical communication
In an optical communication-use receiving circuit of the present invention, the pulse width of the received pulse which is a binary signal corresponding to the signal optical pulse is specified by...
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7460788 |
Transmitting and receiving device
A transmitting and receiving device, in which the received signal which is produced by the receiving device has only a small amount of crosstalk. This object is achieved by providing a transmitting...
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7449670 |
Amplifier circuit and optical pickup device
An amplifier circuit according to the present invention includes: a first operational amplifier having a negative input terminal, a positive input terminal, and an output terminal; a photodiode...
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7427733 |
Gated image intensifier
A gated optical image intensifier 10 is provided with multiple intensifying channels 20, 22, 24, 26 each supplied with radiation via a respective optical channel of an optical splitter. The...
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7423250 |
Systems, circuits and methods for extending the detection range of an inspection system by avoiding circuit saturation
Inspection systems, circuits and methods are provided to enhance defect detection by addressing saturation levels of the amplifier and analog-digital circuitry as a limiting factor of the...
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7376359 |
Digital regulated light receive module and regulation method
The invention discloses a digital adjusting method for an optical receiver module, and the method implements real-time monitor of parameters, on-line adjustment and non-linear compensation. The...
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7373091 |
Multicasting optical switch fabric and method of detection based on novel heterodyne receiver
The inventors propose herein a switch fabric architecture that allows broadcasting and fast channel access in the ns-range. In various embodiments of the present invention, 10 Gb/s receiver modules...
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7330668 |
Low noise light receiver
The low noise light receiver comprises a light sensor for generating a sensor signal, the sensor signal comprising a wanted signal resulting from a light source and an interfering signal resulting...
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7326905 |
Photodetector and optical receiver
An optical receiver is provided with an optical-signal-receiving section and a controlling section. The optical-signal-receiving section incorporates a photodetector. The photodetector has an APD....
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7317566 |
Electrode with transparent series resistance for uniform switching of optical modulation devices
Switching uniformity of an optical modulation device for controlling the propagation of electromagnetic radiation is improved by use of an electrode comprising an electrically resistive layer that...
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7297921 |
Photodetection circuit and confocal microscope that has it
A first amplification unit amplifies at a predetermined amplification rate an output signal from a photodetection unit for detecting an optical signal from a specimen and detecting it. An offset...
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7298978 |
Method and apparatus for optimizing decision level of signal output from optical receiver
An optical receiver in an optical communication system, and more particularly, to a method and an apparatus for optimizing a decision level of a signal output from an optical receiver to obtain a...
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7274010 |
Semiconductor optical amplifier device amplifying an externally applied light signal, semiconductor optical amplification driving device and semiconductor light receiving apparatus
A semiconductor optical amplifier device includes an active layer, an n-type InP substrate, an n-type InP clad layer, a p-type InP clad layer, p-electrodes and n-electrodes. The active layer is...
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7212749 |
Signal receiver having wide band amplification capability
An Improved Signal Receiver Having Wide Band Amplification Capability is disclosed. Also disclosed is a receiver that is able to receive and reliably amplify infrared and/or other wireless signals...
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7173237 |
Ruggedized digital low-light viewing device
A digital low-light viewing device comprises a housing having a first end and an opposing second end, the first end defining an optical input aperture and the second end defining an optical output...
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7170606 |
Multi-way LED-based surface reflectance sensor and spectrophotometer
A light sensor circuit based on direct connection of LEDs to I/O pins of a microcontroller. The LEDs are reverse biased and the parasitic junction capacitance is charged in an output mode. Then,...
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7129462 |
Digitally enhanced image intensification camera
An image intensification camera system (C) for gathering image data includes an image intensifier (310) for amplifying received light (312). A relay optic assembly (316) is coupled between the...
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7113321 |
Optical deflection apparatus and manufacturing method thereof, optical deflection array, imaging apparatus, and image projection display apparatus
A miniaturized and highly integrated optical deflection apparatus is realized in which the number of electrodes for driving the optical deflection apparatus is reduced. The optical deflection...
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7057149 |
Method and system for controlling a secondary amplifier with a primary amplifier in an optical network
A method for controlling an amplifier in an optical network includes determining primary pump power information for a primary amplifier and communicating the primary pump power information to a...
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6974946 |
Transmission stacked photodetector
There is provided a photodetector which has the function of measuring the intensity distribution of light with a simple and inexpensive construction and which has a selectivity for a measured...
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6927383 |
Radiation hardened visible P-I-N detector
Disclosed is a method for producing an array (20) of p-intrinsic-n light detectors, as is an array produced in accordance with the method. The method includes providing a wafer (1); forming a first...
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6903324 |
Optical amplifier amplifying wavelength multiplexed light, and wavelength multiplexed light communications system
Wavelength multiplexed light is amplified by first and second EDFs. Gains of the first and the second EDFs are respectively held to be predetermined values by first and second AGC circuits. Between...
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6898890 |
Night-vision optical device having controlled life expectancy
A night-vision optical device of the invention with controlled life expectancy contains a time measuring device built into the housing of the aforementioned device for measuring the accumulated...
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6894266 |
Single chip ASIC and compact packaging solution for an avalanche photodiode (APD) and bias circuit
A compact integrated APD device integrates the bias voltage and temperature compensation functions inside a standard 4-pin PIN package. The active components of the bias and temperature...
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6838654 |
Photodetection system and circuit for amplification
A first device comprising a first current mirror is used to amplify the output of a first photodetector. A second device comprising a current mirror arrangement is employed to amplify the output of...
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6834165 |
Parallel opto-electric structure for high sensitivity and wide bandwidth optical transceiver
An optical receiver circuit including a plurality of PIN diodes, each associated with a dedicated element transimpedance amplifier, the outputs of the element transimpedance amplifiers being...
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6815656 |
Integrated optical cross-connect amplifier
A vertical cavity optical amplifier can tilt to reflect light in different directions. An array of such amplifiers can serve as an optical cross-connect.
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6765189 |
Small form factor in-line switched multichannel fiber optic power monitoring apparatus
A switched multichannel fiber optic power monitoring apparatus, includes a plurality of photodetectors, each connected to a tap of a different optical line for converting an optical signal...
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