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| Number | Title | Issue Date |
| 8179200 | Amplifier circuit and light receiving amplifier circuit using the same An amplifier circuit includes an amplifier unit that amplifies a signal received by an input terminal and outputs the amplified signal to an output terminal, a feedback capacitor that is connected between the input terminal of the amplifier and the output terminal, ... | 05/15/2012 |
| 8149063 | Current-restriction circuit and driving method therefor A current-restriction circuit includes an input terminal to which an input voltage is input, an output terminal from which an output voltage is output, a driver transistor connected to the input terminal as well as the output terminal, a sense transistor connected t... | 04/03/2012 |
| 8138838 | Electron beam switch The present invention is directed to an electron beam crossbar switch for interconnection between communication units. The crossbar switch includes an array of electrically charged particle emitter source devices with an input connected to a slow wave structure coup... | 03/20/2012 |
| 8063705 | Push-pull transimpedance amplifier The present disclosure relates to a push-pull transimpedance amplifier (TIA) that receives a push-pull radio frequency (RF) input current signal having a push current and a pull current and includes a common-emitter pre-amplifier and a dynamic feedback current sourc... | 11/22/2011 |
| 8054136 | Electronic circuit An electronic circuit includes a transimpedance amplifier, a bypass circuit that allows a part of an input signal to be applied to the transimpedance amplifier to flow through the bypass circuit so as to bypass the transimpedance amplifier on the basis of a control ... | 11/08/2011 |
| 8022771 | Linearized trans-impedance amplifiers The disclosed systems and methods utilize an advanced linearized trans-impedance amplifier (ATIA) that allows for the recovery and amplification of low amplitude analog and digital signals. This disclosure further describes unique approaches of addressing issues inh... | 09/20/2011 |
| 7961053 | Integrated circuit having a dummy transimpedance amplifier Consistent with the present disclosure, a “dummy” transimpedance amplifier (dummy TIA) is provided on a substrate along with one or more other transimpedance amplifiers (TIAs) that are connected to photodiodes and output voltage signals for further processing. T... | 06/14/2011 |
| 7948323 | Linear transimpedance amplifier with wide dynamic range for high rate applications Various amplifier configurations having increased bandwidth, linearity, dynamic range, and less distortion are shown and disclosed. To increase bandwidth in a transimpedance amplifier, a replica circuit is created to replicate a degeneration resistance, or the resis... | 05/24/2011 |
| 7911278 | Biased low differential input impedance current receiver/converter device and method for low noise readout from voltage-controlled detectors A first stage electronic system for receiving charge or current from voltage-controlled sensors or detectors that includes a low input impedance current receiver/converter device (for example, a transimpedance amplifier), which is directly coupled to the sensor outp... | 03/22/2011 |
| 7898341 | Non-inverting amplifier circuit and optical switch driver circuit A non-inverting amplifier circuit is disclosed that includes an operational amplifier and a preemphasis circuit connected between the operational amplifier and a signal source. The preemphasis circuit is configured to compensate for the internal delay of a load conn... | 03/01/2011 |
| 7868701 | Transimpedance amplifier A gain switching determination circuit (250) compares/determines a comparative input voltage (Vc) from an inter-stage buffer (230) with a first hysteresis characteristic, and outputs a gain switching signal (SEL) based on the comparison/determination r... | 01/11/2011 |
| 7868702 | Photoreceiver/amplifier circuit, optical pickup device, and optical disk device The subject invention provides a photoreceiver/amplifier circuit comprising a differential circuit including a differential transistor pair and a bias circuit; an active load; a feedback resistor for converting a photocurrent generated from a photodiode into a volta... | 01/11/2011 |
| 7859342 | Differential amplifier circuit, operational amplifier circuit, light-receiving amplifier circuit using the same, function selection circuit, and light-receiving circuit using the same A differential amplifier circuit, an operational amplifier circuit, and a light-receiving amplifier circuit using the same are provided, by which the influence of an on resistance of an analog switch is reduced during the switching of gain resistances. An NPN transi... | 12/28/2010 |
| 7825735 | Dual-range linearized transimpedance amplifier system A transimpedance amplifier system is disclosed which simultaneously generates a low-gain output signal and a high-gain output signal from an input current signal using a single transimpedance amplifier having two different feedback loops with different amplification... | 11/02/2010 |
| 7755433 | Preamplifier and optical receiving device including the same A preamplifier includes a single-ended amplifier, a differential amplifier, an operational amplifier, and a clipping circuit. The single-ended amplifier converts an input current signal into a voltage signal, outputs an amplified voltage signal according to a preset... | 07/13/2010 |
| 7755434 | Electronic circuit An electronic circuit includes a differential amplifier circuit, a first smoothing circuit, a second smoothing circuit and a first switch. The differential amplifier circuit receives a digital input signal and a reference signal. The first smoothing circuit smoothes... | 07/13/2010 |
| 7671687 | Electron beam RF amplifier and emitter RF field is sensed to produce an incoming voltage that drives a microarray of electron guns in a sweep pattern towards a detector array. The electron guns emit a beam current that may amplify the incoming voltage signal, and the detector material may be selected to ... | 03/02/2010 |
| 7642860 | Current pre-amplifier and associated current comparator A current pre-amplifier with an input capable of receiving or supplying an input current with at least one pulse, wherein the pre-amplifier includes a regulated cascode stage including an input transistor and a first current generator as well as an output transistor... | 01/05/2010 |
| 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 received-light amplifier which can prevent the deterioration of output ... | 11/10/2009 |
| 7605660 | Linear multi-stage transimpedance amplifier An apparatus comprising a first amplifier circuit, a detect circuit, a control circuit and a second amplifier circuit. The first amplifier circuit may be configured to generate an amplified signal in response to an input signal. The detect circuit may be configured ... | 10/20/2009 |
| 7602251 | Arrangement for carrying out current-to-voltage conversion An arrangement is provided for carrying out current-to-voltage conversion, preferably for an infrared receiver, in which the static offset, which has an interfering effect with regard to sensitivity or malfunctions, is reduced during the carrying out of current-to-v... | 10/13/2009 |
| 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 input and an output. The circuit also includes multiple short detection... | 10/06/2009 |
| 7579915 | Electronic circuit An electronic circuit includes: a control circuit that controls the gain of a transimpedance amplifier by taking part of an input current to be input to the transimpedance amplifier, based on the output voltage of the transimpedance amplifier; and a PIN diode that i... | 08/25/2009 |
| 7567130 | Linearized trans-impedance amplifier The disclosed systems and methods utilize an advanced linearized trans-impedance amplifier (ATIA) that allows for the recovery and amplification of low amplitude analog and digital signals. This disclosure further describes unique approaches of addressing issues inh... | 07/28/2009 |
| 7525391 | Linear transimpedance amplifier with multiplexed gain stage A linear transimpedance amplifier includes a forward transimpedance circuit that receives an input signal from an optical device. The forward transimpedance circuit generates a linear output signal. The forward transimpedance circuit includes a first gain path and a... | 04/28/2009 |
| 7504889 | Circuit for providing a signal boost Embodiments disclosed herein relate to an amplifier stage or circuit for providing a signal boost. The circuit includes an emitter-follower pair and a cross coupled differential pair. The cross coupled differential pair provides a feedback signal that provides a boo... | 03/17/2009 |
| 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 plurality of input pulses received by a first TIA, the current optim... | 03/10/2009 |
| 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 accordance with the illustrative embodiment, a common-mode feedback compar... | 01/13/2009 |
| 7466204 | Differential amplifier circuit, operational amplifier circuit, light-receiving amplifier circuit using the same, function selection circuit, and light-receiving circuit using the same A differential amplifier circuit, an operational amplifier circuit, and a light-receiving amplifier circuit using the same are provided, by which the influence of an on resistance of an analog switch is reduced during the switching of gain resistances. An NPN transi... | 12/16/2008 |
| 7459982 | EMI reduction stage in a post-amplifier An amplifier output stage for reducing Electromagnetic Interference (EMI) that includes an output node and an input node. A first transistor has a base terminal coupled to the input node and has a collector terminal coupled to the output node. A second transistor ha... | 12/02/2008 |
| 7453322 | Transimpedance amplifier using negative impedance compensation A transimpedance amplifier (TIA) with negative impedance compensation comprises a TIA element and a negative impedance compensator connected to the output terminal of the TIA element. The major components of the negative impedance compensator are a negative impedanc... | 11/18/2008 |
| 7427738 | Light-receiving amplifier and optical pickup device A light-receiving amplifier circuit of the present invention includes: a first preamplifier circuit to which a light-receiving element is connected; a second preamplifier circuit which is the same type as the first preamplifier circuit and which is apart from the li... | 09/23/2008 |
| 7418213 | Transimpedance amplifier with integrated filtering and reduced parasitic capacitance A transimpedance amplifier (TIA) with integrated filtering. A capacitance is integrated into the TIA and connected to the power supply and to an internal ground of the TIA. Noise on the power supply of the transimpedance amplifier is filtered by the capacitor such t... | 08/26/2008 |
| 7411460 | Elimination of dummy detector on optical detectors using input common mode feedback A voltage reference forces a constant voltage at the inputs to an amplifier, thereby negating a need for a dummy detector on the non-active input of the amplifier. ... | 08/12/2008 |
| 7408141 | Light-receiving amplifier circuit and optical pick-up device using the same The present invention provides a light-receiving amplifier circuit which includes a clipping circuit, can prevent an oscillation at the time of clipping operation, and can freely set clipping voltage. The light-receiving circuit of the present invention includes a p... | 08/05/2008 |
| 7406268 | Optical receiver circuit An optical receiver circuit is constructed to be immune to interference from external interference signals. The optical receiver circuit includes a differential amplifier having an optical reception device connected to one input of the differential amplifier. The op... | 07/29/2008 |
| 7403065 | Differential transimpedance amplifier circuit for correlated differential amplification A differential transimpedance amplifier circuit for correlated differential amplification. The amplifier circuit increase electronic signal-to-noise ratios in charge detection circuits designed for the detection of very small quantities of electrical charge and/or v... | 07/22/2008 |
| 7391265 | Amplifier unit and optical disc drive An amplifier unit is provided, with which the need for manufacturing a photoelectric conversion IC in Bi-CMOS process is eliminated, and relatively low process cost of the photoelectric conversion IC is achieved. The input section of a buffer (the base of a transist... | 06/24/2008 |
| 7389056 | Preamplifier circuit, clock switching circuit, and optical receiver A preamplifier circuit, a clock switching circuit, and an optical receiver are provided that include a preamplifier that controls a bandwidth for conducting amplification on an input signal by varying a feedback resistance according to a control signal; a control si... | 06/17/2008 |
| 7388435 | Linearized trans-impedance amplifier The disclosed systems and methods utilize an advanced linearized trans-impedance amplifier (ATIA) that allows for the recovery and amplification of low amplitude analog and digital signals. This disclosure further describes unique approaches of addressing issues inh... | 06/17/2008 |
