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| Number | Title | Issue Date |
| 8188783 | Device and system for implementing optically sourced isolated switch elements A power amplifier comprising a distributed signal pre-driver, an AM Modulation Driver and a Switch Power Supply driving optically-powered and optically-switched GaN-based switches which are stacked and operated in a complementary fashion and are amplitude modulated ... | 05/29/2012 |
| 8013660 | System and method for charge integration An arrangement for charge integration comprises a charge-generating circuit (2) that provides a charge-dependent signal, and a coupling circuit (20) comprising a first and a second transistor (T1, T2). The first transistor (T1) can... | 09/06/2011 |
| 7420406 | Method and circuit arrangement for setting an initial value on a charge-storage element A method is provided for setting an initial value on a charge-storage element. A circuit includes at least one charge-storage element with at least one signal node coupled to at least one reset circuit that is associated with the charge-storage element. A diode can ... | 09/02/2008 |
| 7402788 | Detector diodes with bias control loop Methods and devices provide for a dynamic bias voltage control in detector photodiodes. The methods and systems use a bias control loop to make continuous detections of changes in the effective breakdown current of the detector photodiodes, thereby enabling the devi... | 07/22/2008 |
| 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 digital optical receiver module includes elements as follow: a voltage o... | 05/20/2008 |
| 7369590 | Laser diode driving circuit A disclosed laser diode driving circuit causes a laser diode to emit light by varying a current value of a current source in accordance with a control signal input externally and supplying a current that is the same as or proportional to the current value to the las... | 05/06/2008 |
| 7365718 | Light emitting element drive apparatus and portable apparatus using the same A light emitting element drive apparatus capable of always outputting the lowest voltage satisfying the drive conditions and having a high light emitting efficiency and a low power loss, and a portable apparatus using the same, comprising a LED drive apparatus 10... | 04/29/2008 |
| 7365302 | Output impedance varying circuit A photo detector IC (PDIC) is connected with a flexible printed circuit board (FPC). A signal converted into a voltage through light-to-voltage conversion in the PDIC is connected with the drain of a field effect transistor (FET), while the source of the FET is conn... | 04/29/2008 |
| 7362010 | Currents-sensing switching circuit A current-sensing switching circuit includes a first terminal clamp for the current feed for a first unit, based on the state of a second unit the state of which is detected at a second terminal clamp. The first terminal clamp may be switched, based on the current t... | 04/22/2008 |
| 7359640 | Optical coupling device and method for bidirectional data communication over a common signal line Optical coupling device operates over a bidirectional data link between at least first and second communicators, each communicating data along a common wire of the data link. The device includes at least first and second optical couplers, each including a photon flu... | 04/15/2008 |
| 7358475 | Solid-state imaging device and camera A solid-state imaging device includes pixels 2 arranged two-dimensionally on a semiconductor substrate 1. In a predetermined area in each pixel is formed a light-sensitive area 3 for receiving incident light 11, and each pixel includes a ... | 04/15/2008 |
| 7351972 | Infrared radiation image having sub-pixelization and detector interdigitation An infrared radiation (“IR”) focal plane array (“FPA”) imager includes a detector array chip containing pixels having substantially one-hundred percent operability. Each of the pixels contains a plurality of interdigitated sub-detectors, where the sub-detect... | 04/01/2008 |
| 7348826 | Composite field effect transistor A composite field effect transistor, in accordance with one embodiment, includes a zener diode, a junction field effect transistor and a metal-oxide-semiconductor field effect transistor. A gate of the junction field effect transistor is coupled to an anode of the z... | 03/25/2008 |
| 7332971 | Multi-gigabit/s transimpedance amplifier for optical networks A Gigabit/s transimpedance amplifier system includes a forward-path amplifier section with a very large bandwidth and an overall frequency-selective feedback section which is active only from DC to low frequencies. The forward-path of the amplifier comprises a regul... | 02/19/2008 |
| 7326947 | Current transfer ratio temperature coefficient compensation method and apparatus An optocoupler system includes a buffer, isolation, and a detector. The system includes a current transfer ratio (CTR) with a temperature coefficient. The buffer includes a light source that generates light that passes through the isolation. A detector receives ligh... | 02/05/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7319220 | Trans-impedance amplifier with offset current A trans-impedance amplifier receives an input current and is operable to generate an output voltage responsive to the input current. The amplifier is responsive to an increased range of input currents and has a wide bandwidth. The amplifier includes an input stage h... | 01/15/2008 |
| 7319232 | Apparatus and method for high-bandwidth opto-coupler interface An opto-coupler interface is provided. The opto-coupler interface includes a current mirror and a resistor. The opto-coupler interface is arranged such that a relatively fixed voltage is provided across the photodetector. At one end of the photodetector, the voltage... | 01/15/2008 |
| 7304418 | Light source apparatus with light-emitting chip which generates light and heat A light source apparatus includes a light emitting chip which generates light and heat when energized via a first electrode and a second electrode, wherein the first electrode is a base on which the light emitting chip is directly packaged. ... | 12/04/2007 |
| 7282692 | Light receiving method of an avalanche photodiode and a bias control circuit of the same The present invention provides a method to maintain a multiplication factor of an avalanche photodiode independent on temperatures without additional devices. The light-receiving apparatus of the invention includes an avalanche photodiode (APD), a dividing circuit, ... | 10/16/2007 |
| 7276684 | High gain photo cell with improved pulsed light operation A photocell system includes a current control circuit that provides an offset voltage. Each photocell in a photocell array includes an opto-electrical converter receives the offset voltage such that the opto-electrical converter establishes a DC operating point. In ... | 10/02/2007 |
| 7271642 | Charge pump drive circuit for a light emitting diode Through operated alternately between a charging phase and a discharging phase, a charge pump converts an input voltage source into a drive voltage for being supplied to a light emitting diode. A current setting unit determines a reference current. A current regulati... | 09/18/2007 |
| 7259363 | Circuit arrangement and methods for a remote control receiver having a photodiode A control unit (2) of a remote control receiver sets the forward or reverse direction operating mode of the photodiode (1) as a function of the useful signal level of its output signal, and to be precise, during standby, the photovoltaic operating mode... | 08/21/2007 |
| 7253391 | Optical sensor device and electronic apparatus 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 load driving capacity. It leads to increase in cost and mounting space... | 08/07/2007 |
| 7253393 | Control of a photosensitive cell A method for controlling a photosensitive cell including a photodiode connected to a read node via a MOS transfer transistor, the read node being connected to a source of a reference voltage via a MOS reset transistor, cyclically including a waiting phase at the end... | 08/07/2007 |
| 7227120 | Area monitoring multi-beam photoelectric sensor A multi-beam photoelectric sensor is disclosed which can be fabricated by selecting the length of a light projection/light-receiving columnar member and the number and pitches of optical axes in accordance with the width of a hazardous area of an object or the diame... | 06/05/2007 |
| 7217982 | Photodiode having voltage tunable spectral response A photodetector (10) includes a substrate (12) having a surface; a first layer (14) of semiconductor material that is disposed above the surface, the first layer containing a first dopant at a first concentration for having a first type of elect... | 05/15/2007 |
| 7215369 | Compact pixel reset circuits using reversed current readout Compact CMOS pixel sensors containing three or four total transistors and four or five control lines provide a high percentage of sensor area for the photodiode that measures light intensity. The CMOS pixel sensors thus have good light sensitivity. The CMOS pixel se... | 05/08/2007 |
| 7214924 | Light-receiving method of an avalanche photodiode and a bias control circuit of the same The present invention provides a method to maintain a multiplication factor of an avalanche photodiode independent on temperatures without additional devices. The light-receiving apparatus of the invention includes an avalanche photodiode (APD), a dividing circuit, ... | 05/08/2007 |
| 7206521 | Signal level detecting device for a burst-mode optical receiver In an optical receiver having a pre-amplifier for converting a current signal outputted from an optical detector to a voltage signal, a signal level detecting device is provided to provide an LOS (loss of signal) signal and a reset signal from the output of the pre-... | 04/17/2007 |
| 7196307 | Optical sensor, method of reading optical sensor, matrix-type optical sensor circuit, and electronic apparatus An optical sensor is provided corresponding to a scanning line and a reading line. The optical sensor includes a light-receiving element, a current flowing between both terminals thereof being changed according to the amount of incident light and a transistor whose ... | 03/27/2007 |
| 7190454 | Automatic power controller An automatic power controller includes a photo detector for detecting the output power of the laser light source and generating a detection signal, a comparator for comparing the detection signal with a reference signal and outputting a comparison signal, a signal s... | 03/13/2007 |
| 7176755 | Transistor-based interface circuitry Among the embodiments of the present invention is an apparatus that includes a transistor, a servo device, and a current source. The servo device is operable to provide a common base mode of operation of the transistor by maintaining an approximately constant voltag... | 02/13/2007 |
| 7164114 | Digital pixel sensor with clock count output and operating method thereof A digital pixel sensor, comprising a first switch coupled between a first voltage and a first node, turned on or off by a rest signal to provide a first voltage to the first node when turned on; a light sensing unit coupled to the first node generating a transformat... | 01/16/2007 |
| 7158729 | Optical receiving device Provided is an optical receiving device which can achieve a wide dynamic range while keeping a constant extinction ratio against the changes in the input amplitude. A signal current of a light receiving element is converted to a signal voltage by an amplifier and th... | 01/02/2007 |
| 7141814 | Input circuit An input circuit has a first current-limiting resistor, a second current-limiting resistor, and an AC-input photocoupler. The photocoupler has an input terminal connected to a first external terminal and another input terminal connected to a positive electrode throu... | 11/28/2006 |
| 7135669 | Low-level light detector and low-level light imaging apparatus A low-level light detector includes an avalanche photodiode (APD) to which is applied a bias voltage adjusted to produce a multiplication factor of not more than 30, and a capacitor for accumulating carriers produced by light in the APD and multiplied using the APD ... | 11/14/2006 |
| 7130177 | Drive circuit of switch and relay circuit A drive circuit and relay circuit using this drive circuit are provided, the drive circuit including: a first terminal connected to a drive electrode located at one side of a mechanical switch contact driven by static electricity; a second terminal connected to a dr... | 10/31/2006 |
| 7109466 | Peak and bottom detectors in burst mode optical receiver A peak detector for detecting a peak value of a burst signal in a burst mode optical receiver is disclosed, which comprises: an amplifying terminal configured to reduce an offset of a peak value in a received burst signal using feedback in the peak detector; a trans... | 09/19/2006 |
| 7105792 | Device for compensating for fluctuations in a light source and film scanner The invention relates to a device for compensating for fluctuations in the light which is emitted by a light source and propogates along a light path. The device has a first light-sensitive sensor. The sensor detects the intensity of the light at a first location al... | 09/12/2006 |
