Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 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 by a current source to output a current corresponding to a differentia... | 04/10/2012 |
| 8129671 | Power supply dependent optical receiver and amplifier and photocoupler using the same In an optical receiver and amplifier and an optical coupler, a technique for stabilize operations at turning on/off of a power supply by a simple configuration is desired. An optical receiver and amplifier includes: a photodiode generates a photocurrent in response ... | 03/06/2012 |
| 8129672 | Photosensor device with dark current cancellation A photosensor device with dark current cancellation is disclosed. The photosensor device comprises a first and second photosensors, a first and second current replication circuits and a digital signal generator. The first photosensor has a first dark current but doe... | 03/06/2012 |
| 8124924 | Photoelectric conversion device and electronic device provided with the photoelectric conversion device An output terminal of a photoelectric conversion element included in the photoelectric conversion device is connected to a drain terminal and a gate terminal of a MOS transistor which is diode-connected, and a voltage Vout generated at the gate terminal o... | 02/28/2012 |
| 8049157 | Semiconductor device 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 having a photoelectric conversion layer; an amplifier circuit including a... | 11/01/2011 |
| 8035072 | Optical semiconductor device and infrared data communication apparatus eliminating low frequency component An optical semiconductor device and an infrared data communication apparatus eliminating a direct current component and a low frequency component included in a light signal. The optical semiconductor device converts a light signal into an electric signal and amplifi... | 10/11/2011 |
| 8035073 | Switched capacitor input stage for imaging front-ends Embodiments of the present invention provide an apparatus and control method for an analog front end (AFE) amplifier for controlling DC restore operations. According to the exemplary method, a first input stage of the AFE is controlled to operate as a continuous tim... | 10/11/2011 |
| 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 systems; a data-holding module for holding the correction data; an add... | 10/11/2011 |
| 8030609 | Read circuit, variable resistive element device, and imaging device A read circuit includes: an integration circuit section configured to perform an integral operation and whose input is connected to an integration node; and a bias circuit connected between a connection node to which a variable resistive element is connected and the... | 10/04/2011 |
| 8013286 | Nanoelectronic differential amplifiers and related circuits having graphene nanoribbons A multiple transistor differential amplifier is implemented on a single graphene nanoribbon. Differential amplifier field effect transistors are formed on the graphene nanoribbon from a first group of electrical conductors in contact with the graphene nanoribbon and... | 09/06/2011 |
| 7977618 | Testing of transimpedance amplifiers Testing is performed on an amplifier wafer housing a transimpedance amplifier prior to packaging the transimpedance amplifier with an external photodetector, wherein the transimpedance amplifier includes a small, auxiliary, integrated silicon photodetector provided ... | 07/12/2011 |
| 7947940 | Photoelectric current integrating circuit including a current passing circuit A photoelectric current integrating circuit including: a first operational amplifier with a switch and an integrating capacitor connected in parallel between an input terminal and an output terminal thereof; a photodiode; and a current passing circuit provided betwe... | 05/24/2011 |
| 7939790 | Method and apparatus for controlling the gain of an avalanche photodiode with fluctuations in temperature A method and apparatus is provided for biasing an avalanche photodiodes (APD). The method includes developing a first output signal s(v1) from the APD when biased with a first bias voltage v1 and developing a second output signal s(v2 | 05/10/2011 |
| 7910874 | Method of amplifying charge in an imager A charge coupled device (CCD) includes a low noise charge gain circuit that amplifies charge of a cell dependent upon the charge accumulated by the cell. The low noise charge gain circuit receives clocking signals, such as from an input diode, which allow charge to ... | 03/22/2011 |
| 7858918 | Molecular transistor circuits compatible with carbon nanotube sensors and transducers Small-signal and other circuit design techniques realized by carbon nanotube field-effect transistors (CNFETs) to create analog electronics for analog signal handling, analog signal processing, and conversions between analog signals and digital signals. As the CNFET... | 12/28/2010 |
| 7838809 | Nanoelectronic differential amplifiers and related circuits having carbon nanotubes, graphene nanoribbons, or other related materials Small-signal and other circuit design techniques realized by carbon nanotube field-effect transistors (CNFETs) to create analog electronics for analog signal handling, analog signal processing, and conversions between analog signals and digital signals. As the CNFET... | 11/23/2010 |
| 7781720 | Direct attach optical receiver module and method of testing A direct attach optical receiver module and a system and method for testing the direct attach optical receiver module are provided. An optical receiver module may include an optical detector and an integrated circuit with an integrated amplifier circuit and at least... | 08/24/2010 |
| 7772537 | 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. ... | 08/10/2010 |
| 7763838 | Photodetecting circuit having adder for photodetection A photodetecting circuit includes an adder that selectively adds outputs of a plurality of circuits for photodetection. Each of the circuits for photodetection includes: a element for photodetecting; a transimpedance amplifier for photodetection, with a first input ... | 07/27/2010 |
| 7745775 | Testing of transimpedance amplifiers Testing is performed on an amplifier wafer housing a transimpedance amplifier prior to packaging the transimpedance amplifier with an external photodetector, wherein the transimpedance amplifier includes a small, auxiliary, integrated silicon photodetector provided ... | 06/29/2010 |
| 7741592 | Physiological sensor with booster circuit A physiological sensor includes a light source in optical communication with a light detector. A controller is in communication with the light detector via a connector. A booster circuit is in communication with the light detector and the connector. The booster circ... | 06/22/2010 |
| 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 characteristics. The switch selects any one of the plurality of photod... | 04/13/2010 |
| 7663089 | 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 which converts the current signal into a voltage signal; a reference v... | 02/16/2010 |
| 7652240 | Image sensor with a plurality of pixels, pixel circuit and method An image sensor has a plurality of pixels, each pixel having a photodiode (12), a voltage amplifier (16) having gain magnitude greater than 1 and a sampling capacitor (18) charged by the voltage amplifier. In this arrangement, each pixel provide... | 01/26/2010 |
| 7652243 | 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 no power level during an integration period of a photodetector to redu... | 01/26/2010 |
| 7642501 | Portable handheld artificial light detector A portable, handheld artificial light detector distinguishes artificial light from sunlight and identifies low-frequency artificial light from high-frequency artificial light. Artificial light includes light from a lamp powered by an AC source. Low frequency light i... | 01/05/2010 |
| 7635837 | Optical receiving circuit A light receiving circuit includes: a first transimpedance amplifier configured to convert an input signal to a voltage signal, the input signal being current-converted by a first photodiode; a second transimpedance amplifier connected to a light-shielded second pho... | 12/22/2009 |
| 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 with a second resistor and a second switching element respectively c... | 10/06/2009 |
| 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 compensating circuit compensates for an ASE component contained in the output mo... | 09/22/2009 |
| 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 transistor 2 of a photoelectric conversion and transfer portion ... | 08/11/2009 |
| 7557334 | Active pixel image sensor with common gate amplifier A method and apparatus to operate a pixel circuit within an active pixel image sensor in a common gate amplifier mode. ... | 07/07/2009 |
| 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 input, an amplifier non-inverting input, and an amplifier output. A photo... | 06/30/2009 |
| 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. ... | 06/09/2009 |
| 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 gain control approach allows the amplifier bandwidth to remain consta... | 05/12/2009 |
| 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 conversion device has a photoelectric conversion device including a pho... | 05/12/2009 |
| 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 optical detector and having an output for outputting a detection pul... | 05/05/2009 |
| 7521662 | Portable handheld artificial light detector A portable, handheld artificial light detector distinguishes artificial light from sunlight and identifies low-frequency artificial light from high-frequency artificial light. Artificial light includes light from a lamp powered by an AC source. Low frequency light i... | 04/21/2009 |
| 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 trans-impedance amplifier circuits, each trans-impedance amplifier circuit h... | 04/14/2009 |
| 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, and are connected between photodiodes (PDs) biased in a forward direc... | 04/07/2009 |
| 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 reset to avoid detector saturation due to common mode components of o... | 03/24/2009 |
