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7626628 |
Photoelectric conversion device, image sensor, optical reader, and method of driving photoelectric conversion device
Provided is a photoelectric conversion device, including: a plurality of photoelectric conversion blocks each including a photoelectric conversion element, photoelectric conversion element...
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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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7616062 |
Received-light amplifier
The present invention has as an object to provide, for received-light amplifiers capable of changing the current-voltage conversion efficiency by changing the resistance of feedback resistors, a...
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7616057 |
Nested transimpedance amplifier
A differential transimpedance amplifier circuit comprises a first operational amplifier having a first inverting input, a first non-inverting input, a first inverting output and a first...
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7612322 |
Temperature-compensated high dynamic range optical receiver
A light sensor having a photocurrent subsection and an interface circuit is disclosed. The photocurrent subsection includes a photodetector, an amplifier, a diode and an impedance element. The...
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7605649 |
Nested transimpedance amplifier
A transimpedance amplifier comprises a first operational amplifier having an input and an output. A second operational amplifier has an input and an output that communicates with the input of the...
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7601939 |
Solid-state image-pickup device with column-line amplifiers and limiter
The levels of the power supply and the ground are kept constant against a parasitic resistance by keeping the constant current of an amplifier irrespective of the size of a pixel signal and the...
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7598812 |
Shorted input detection for amplifier circuits
A method and an apparatus are described for shorted input detection for amplifier circuits. An embodiment of a circuit includes multiple amplifier circuits, with each amplifier circuit having an...
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7598479 |
Circuit for varying gain of preamplifier
A gain switching circuit switches a conversion gain of a preamplifier that is configured with a series circuit formed with a first resistor and a first switching element and a series circuit formed...
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7592580 |
Optical amplifier and gain control method
An input monitoring unit monitors full input light and outputs an input monitor signal. An output monitoring unit monitors full output light and outputs an output monitor signal. An ASE...
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7589316 |
Scanning beam imaging with adjustable detector sensitivity or gain
A scanning beam assembly comprising: a beam generator to generate a beam of radiation, an oscillating reflector configured to deflect the beam at varying angles of excursion to yield a scanned beam...
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7589304 |
Solid-state image-pickup device with column-line amplifiers and limiter
The levels of the power supply and the ground are kept constant against a parasitic resistance by keeping the constant current of an amplifier irrespective of the size of a pixel signal and the...
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7573016 |
Amplification type solid-state imaging device
In the amplification type solid-state imaging device of the present invention, the input side of a switched capacitor amplifier portion 20 is connected to the output side of each transfer...
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7557333 |
Optical signal receiving circuit and optical signal receiving apparatus
An optical signal receiving circuit has a current-voltage converting circuit which receives the output current signal of a photoelectric converting circuit, converting an optical signal into the...
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7554072 |
Amplifier configuration with noise reduction for a photodiode
A system, method, and device for amplifying the signal of a photodiode are provided. The exemplary system may have a photodiode with an amplifier. The amplifier may have an amplifier inverting...
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7553152 |
Flame detector trapezoidal excitation generator output control circuit and method
An electronic circuit for generating a trapezoidal excitation waveform includes a controllable frequency source and a trapezoidal waveform generator. The controllable frequency source generates a...
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7550700 |
Light-receiving semiconductor device and optical pickup device
According to an embodiment of the present invention, a semiconductor device used in an optical disk device driving an optical disk, includes: an optical pickup device detecting an optical signal...
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7544921 |
Linear distributed pixel differential amplifier having mirrored inputs
A pixel circuit that partially incorporates an associated column amplifier into the pixel circuitry. By incorporating part of a mirrored amplifier into the pixel, noise from the pixel is reduced.
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7536107 |
Optical offset signal cancellation for optical receiver
A laser driver for high speed interconnections may convert a digital signal to a current train of a bias mode to represent logical zero and of a modulation mode to represent logical one. An optical...
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7534981 |
Optical semiconductor device having a shield wire and optical pickup device having a shield wire
An optical semiconductor device of the present invention includes: a light-receiving element which converts light into an electric signal; an amplifier circuit having an input terminal to which the...
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7531784 |
Semiconductor device and electronic appliance using the same
An object is to provide a photoelectric conversion device capable of detecting a wider range of illuminance without expansion of a range of an output voltage or output current. The photoelectric...
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7531783 |
Variable gain constant bandwidth trans-impedance amplifier for fiber optic rate sensor
A trans-impedance amplifier with gain control for a fiber optic rotation rate sensor. A variable gain amplifier having gain control based on keeping the amplifier output above a certain level. The...
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7528357 |
Pulse detector which employs a self-resetting pulse amplifier
A circuit including: an optical detector for detecting an optical pulse and generating therefrom a current pulse on an output; a pulse detector circuit having an input electrically connected to the...
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7525078 |
Photodetector array with background current compensation means
A photo detector device includes a photosensitive transistor capable of detecting an optical signal including an image component and a background component and converting the optical signal into a...
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7518094 |
Compensation of nonuniformity among multiple sensing diodes in a multiple sensor device
A method and system for the compensation of nonuniformity among a plurality of light sensing diodes adapted to convert light to a current output. A system embodiment includes a plurality of...
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7515082 |
Photo-detector filter having a cascaded low noise amplifier
Method and systems related to obstructing a first predefined portion of at least one defined wavelength of light incident upon a first photo-detector array; and detecting the at least one defined...
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7514665 |
Differential amplifier circuit with rectifier for optical pick-up device
A light-receiving amplifier circuit in which diodes are commonly connected to a differential amplifier circuit including a transistor of a differential input stage that is an inverting input unit,...
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7509113 |
Monolithic optical autocompensation read-out circuit for precise reflection measurements of distances
A circuit and method are given, to realize a loudness control for mobile phone earpieces and speakers with the help of a proximity sensor, which is realized as an infrared photo-electric guard...
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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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7507947 |
Method and system to differentially enhance sensor dynamic range using enhanced common mode reset
Effective differential dynamic range and common mode rejection in a differential pixel detector are enhanced by capturing and isolating differential detector charge output before using common mode...
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7504612 |
Ambient light processing system for controlling display device by sensing ambient light and method using the system
An ambient light processing system for controlling a display device by sensing ambient light and a method using the system. The ambient light processing system includes a photo-detector, an...
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7501898 |
Method and apparatus for generating an optimized reference current threshold
In one embodiment, apparatus is provided with current optimization logic, a programmable current source for generating a reference current threshold, and current programming logic. In response to a...
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7495203 |
In-situ power monitor providing an extended range for monitoring input optical power incident on avalanche photodiodes
Disclosed are an in-line monitoring apparatus, an optical receiver and a method for monitoring an input power of an optical signal in which one or more power monitoring stages, for example can...
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7491925 |
Photodetector comprising a monolithically integrated transimpedance amplifier and evaluation electronics, and production method
The aim of the invention is to configure a photodetector ( 10 ) such that no disadvantages are created for processing low luminous intensities on detectors known in prior art, especially when...
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7485838 |
Semiconductor device comprising a photoelectric current amplifier
The present invention provides a photoelectric conversion device capable of detecting light from weak light to strong light and relates to a photoelectric conversion device having a photodiode...
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7477109 |
Process and temperature-compensated transimpedance amplifier
An optical receiver is disclosed that exhibits an improved phase margin and substantially constant output in response to changes in operating conditions (e.g., temperature, process, etc.). In...
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7476839 |
Amplifier circuit for optical disk drive
An operational amplifier including a pair of differential input transistors is provided with a feedback resistor switching circuit and a variable current source. When a loaded optical disk is a...
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7473883 |
Amplification with feedback capacitance for photodetector signals
Signals from an imager pixel photodetector are received by an amplifier having capacitive feedback, such as a capacitive transimpedance amplifier (CTIA). The amplifier can be operated at a low or...
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7473881 |
Image sensor
The image sensor has a plurality of pixels arranged in rows and columns to form a pixel array, each pixel column having a column bitline. The image sensor includes a column readout for each column...
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7470886 |
Light receiving circuit, semiconductor laser device, and optical pickup device
There is provided a light receiving circuit capable of preventing an output variation of the light receiving circuit due to a change in ambient temperature with a simple configuration. The light...
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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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7470884 |
Signal strength detection circuits for high speed optical electronics
This disclosure is generally concerned with devices for determining photocurrent levels. One example of such a device is an optoelectronic transceiver that includes a laser and a photodetector. The...
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7468500 |
High performance charge detection amplifier for CCD image sensors
The CCD charge detection amplifier includes a floating diffusion charge detection node biased from a voltage reference node; a reset device coupled between the floating Diffusion charge detection...
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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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7459667 |
Active pixel image sensor with common gate amplifier mode
A method and apparatus to operate a pixel circuit within an active pixel image sensor in a common gate amplifier mode. A bias voltage is applied to a row select transistor in a pixel circuit, and...
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7456382 |
Load sensor, method of detecting load and pedestrian protection system
A load sensor includes a optical fiber sensor that provides output analog signals in response to shocks of various magnitudes caused by hits by a vehicle on various objects, two or more amplifiers...
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7453054 |
Method and apparatus for calibrating parallel readout paths in imagers
An imaging device with readout chain circuitry that uses multiple analog-to-digital converters and amplifiers, which are similarly calibrated using a stitching technique, to readout each color of a...
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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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7449669 |
Receiving apparatus
There may be provided a receiving apparatus including: a light receiving element which receives an optical signal and generates a current signal dependent on the optical signal; a conversion unit...
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