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9040897 Photo-sensing pixel circuit with conversion gain adjustment unit and image sensor  
A photo-sensing pixel circuit including a photo-sensing part, a transfer transistor, a plurality of adjustment transistors, and an output circuit is provided. The photo-sensing part senses a light...
9035228 Light sensor and driving method of photo transistor thereof  
A light sensor including a photo transistor is provided. A gate of the photo transistor receives a gate driving signal. The photo transistor senses a light source based on the gate driving signal...
9024247 Device and method for reducing amplitude noise of a light radiation  
The invention relates to a device for reducing amplitude noise of a light radiation, comprising a first birefringent crystal, which has a first length along a direction of light propagation as...
8921754 Advanced temperature compensation and control circuit for single photon counters  
A PET scanner (10) includes a ring of detector modules (16) encircling an imaging region (18). Each of the detector modules includes one or more sensor avalanche photodiodes (APDs) (34) that are...
8835827 Current integrator with wide dynamic range  
A determination circuit for measuring a current is reset each time the integration value of the current exceeds a threshold until expiration of a predefined maximum integration time. This...
8822900 Multi-mode photodetector  
A photodetector includes a photodiode and output circuitry coupled to the photodiode. The photodetector is configurable for operation in at least two modes. A first configurable mode operates the...
8803054 Apparatus, focus detection apparatus, and image pickup system  
In a photoelectric conversion apparatus, an error can occur due to a voltage drop through a MOS transistor. In the photoelectric conversion apparatus, to reduce the error, a circuit block disposed...
8754358 CMOS sensor array  
A CMOS sensor includes a pixel configured to output a voltage based on incident light received by the pixel. A first circuit is coupled to the pixel and is configured to determine a reset voltage...
8748798 Comparator circuit for reduced output variation  
A comparator circuit for generating a signal representing a comparison of an input signal and a reference signal. In an embodiment, the comparator circuit includes a first stage and a second stage...
8743360 Detection method for birefringence measurement  
A method of controlling a light beam in an optical system includes a light source that directs a collimated light beam along a path, through a sample, and toward the active area of a stationary...
8729451 Multilevel reset voltage for multi-conversion gain image sensor  
A method of operating an image sensor includes adjusting a capacitance coupled to a circuit node within a pixel cell. The circuit node is coupled to selectively receive an image charge acquired by...
8725005 Dynamic impedance photodetector receiver circuit  
A photodetector receiver circuit for an optical communication system includes an optical photodetector which receives optical signals and converts them into an electrical current. In one...
8653433 Transimpedance amplifier and PON system  
In a gain-switching-type transimpedance amplifier, in order to provide a technique capable of preventing unnecessary gain switching caused when noise is received, and preventing decrease in...
8624192 System for controlling photomultiplier gain drift and associated method  
A system for controlling photomultiplier gain drift is disclosed. According to one aspect, the system includes first means for measuring a noise signal of the photomultiplier, the first means...
8575533 High dynamic range imager circuit and method for reading high dynamic range image  
The present invention discloses a high dynamic range imager circuit and a method for reading high dynamic range image with an adaptive conversion gain. The high dynamic range image circuit...
8541728 Signal monitoring and control system for an optical navigation sensor  
A circuit and method are provided to control the strength of signals from an array of photo-detectors in an optical navigation sensor. In one embodiment, the method includes receiving a current...
8541727 Signal monitoring and control system for an optical navigation sensor  
A circuit and method are provided to control the strength of signals from an array of photo-detectors (PDs) in an optical navigation sensor. The circuit includes a number of...
8525093 Automatic set-up for instrument functions  
Machine-implemented methods and apparatuses to automatically set-up a signal processing system are described. The signal processing system is set to a first bandwidth. A sampling frequency of the...
8520207 Detection system for birefringence measurement  
A system for controlling a light beam in an optical setup includes a light source that directs a collimated light beam along a path, through a sample, and toward the active area of a stationary...
8369714 Burst optical signal receiving device  
A burst optical signal receiving device is provided, which includes an optical receiving component and a limiting amplifying circuit unit. The optical receiving component further includes a...
8248165 Amplifier and optical module performing gain control  
An amplifier includes a first transistor having a first conducting electrode receiving a current, a control electrode coupled to the first conducting electrode, and a second conducting electrode...
8238760 Optical receiver with improved noise tolerance  
The present invention provides a system, apparatus and method to improve the signal-to-noise ratio performance in receivers configured to receive differential data signals. According to various...
8190035 Burst mode linear optical receivers  
Techniques are provided for implementing a burst mode optical receiver capable of maintaining a stable gain profile in response to a burst signal. The optical receiver has a photodiode in balanced...
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...
8150272 Systems and methods for transferring single-ended burst signal onto differential lines, especially for use in burst-mode receiver  
Systems and methods for transferring incoming single-ended burst signals of which at least one characteristic varies widely from burst to burst onto a pair of differential lines. The systems...
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...
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...
8055138 Photosensor operating point  
The subject matter disclosed herein relates to determining a photosensor operating point.
8035074 Automatic gain control for motion encoder signals  
Disclosed are various embodiments of pulse generation and automatic gain control (“AGC”) circuits and corresponding methods that are especially well suited for use in motion encoding systems....
8035071 Contamination-inspecting apparatus and detection circuit  
The detection part has: a subtraction module for calculating correction data from data of detection systems when a reference-voltage generation module applies a reference voltage to the detection...
8028917 Adaptive optimizations for signal processing in imaging readers  
An imaging reader includes an illuminating light assembly, an illuminating control operative to control either the intensity or the duration of the illumination light projected by the illuminating...
8032035 Light detecting apparatus and output light intensity controller  
A light detecting apparatus receives input light branched and output by a branching device, to calculate transmittance and reflectivity from the input light, acquires a wavelength corresponding to...
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...
7952427 Signal amplifier circuit and optical receiver  
A signal amplifier circuit includes peak value holding circuit 11 receiving positive-phase input signal, peak value holding circuit 12 receiving negative-phase input signal, adder 13 adding the...
7928355 Current subtraction pixel  
A pixel for detecting at least a portion of the electromagnetic spectrum may be provided. The pixel includes a detector element for detecting at least a portion of the electromagnetic spectrum, a...
7912383 Configurable post-amplifiers that are capable of being configured to perform either substantially linear or limiting amplification for use in optical receivers  
Configurable amplifiers for optical receivers and transceivers are disclosed. In one aspect, a configurable amplifier may be coupled with an output of a current-to-voltage converter to receive a...
7897900 Imager system with gain control means  
An imager system is disclosed comprising a image intensifier and a CMOS image sensor. The system provides fast capture speed and high sensitivity.
7866903 Printer and emission intensity adjusting method  
A printer for performing a printing operation on a printing medium, includes an optical sensor, operable to detect the printing medium; an emission intensity adjuster, operable to adjust emission...
7830560 System and method for adaptive digital ramp current control  
An adaptive digital ramp current control system comprises a digital current ramp controller configured to digitally ramp a current level supplied to at least one light emitting diode (LED)...
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...
7807956 Current detection circuit  
A current detection circuit detects photoelectric current that flows through a phototransistor, and outputs a current, which is proportional to the photoelectric current, via an output terminal....
7792435 Control device with a switchable bandwidth  
A control device with a switchable bandwidth including: an integrating element with a first capacitance, which is charged and discharged by at least one current; at least one second capacitance,...
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 operational...
7750331 Method and device for imaging an interior of a turbid medium using an amplification factor selected from an estimate of expected electrical signal strength  
The invention relates to a method and device (1) for imaging an interior of a turbid medium (55). A turbid medium (55) inside a measurement volume (15) is irradiated from a plurality of source...
7714266 Method and apparatus for measuring source follower gain in an image sensor array  
Disclosed embodiments provide a method and apparatus for measuring the gain of output transistors of pixels in an imager device. Source/drain terminals of the output transistor and a reset...
7705284 High-speed single-photon detector in telecommunication wavelength band  
In order to operate a single photon detector in communication wavelength band at a high speed, a DC bias voltage 2 lower than the breakdown voltage is applied to an InGaAs/InP avalanche photodiode...
7696467 Semiconductor photosensor device with sensitivity region for wide dynamic range and information apparatus  
A semiconductor photosensor device includes a plurality of photodiode sections, a switch, and an output section is provided. The plurality of photodiode sections have different illuminance-output...
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...
7667176 Readout technique for increasing or maintaining dynamic range in image sensors  
The apparatus and method provide a readout technique and circuit for increasing or maintaining dynamic range of an image sensor. The readout technique and circuit process each pixel individually...
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...

Matches 1 - 50 out of 288 1 2 3 4 5 6 >