Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Application No. | Application Title | Issue Date |
| 20110291766 | 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 sensitivity caused when noise with a large input level is received, and then, a ... | 12/01/2011 |
| 20110148522 | 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. Typic... | 06/23/2011 |
| 20100045387 | OPTICAL RECEIVER-AMPLIFIER There is provided an optical receiver-amplifier wherein the need for a large capacitance capacitor for AC coupling is eliminated to thereby enable miniaturization of a receiver in whole, and output waveforms of a differential limiter amp can be rendered symmetrical with... | 02/25/2010 |
| 20090231029 | COMBINATION OFFSET VOLTAGE AND BIAS CURRENT AUTO-ZERO CIRCUIT A circuit with an input acquisition loop and an output acquisition loop is used to compensate for the input offset voltage and bias current errors of an operational amplifier.... | 09/17/2009 |
| 20090224835 | High speed preamplifier circuit, detection electronics, and radiation detection systems therefrom A preamplifier circuit for processing a signal provided by a radiation detector includes a transimpedance amplifier coupled to receive a current signal from a detector and generate a voltage signal at its output. A second amplification stage has an input coupled to an o... | 09/10/2009 |
| 20090219091 | SYSTEM AND METHOD FOR MEASURING THE OUTPUT OF A PHOTODETECTOR A system for measuring the output of a photodetector is disclosed. An integrating amplifier circuit receives a signal output from the photodetector and is adapted to output an integrating amplifier voltage proportional to the signal output from the photodetector. A refe... | 09/03/2009 |
| 20090051442 | TRANSIMPEDANCE AMPLIFIER CIRCUIT FOR OPTICAL RECEIVER IN OPTICAL COMMUNICATION SYSTEM A transimpedance amplifier circuit for an optical receiver in an optical communication system in which a range of an increase/decrease in bandwidth according to gain change is reduced by a bandwidth adjustor. The circuit includes: a photodiode (PD) for generating a curr... | 02/26/2009 |
| 20090011732 | Tuning circuitry utilizing frequency translation of an impedance from a fixed-filter frequency response A circuit and method for tracking a local oscillator signal frequency in an RF tuner, for tuning input RF signals. The RF tuner includes a frequency-dependent impedance generator that generates a frequency-dependent impedance at the input by rejecting unwanted input RF ... | 01/08/2009 |
| 20080290952 | Dvd Reading Apparatus A photodiode (201) is positioned so as to detect a beam of light reflected from the surface of a spinning DVD. In response to the detection of incident light, the photodiode (201) generates a signal, which is input to a trans-impedance amplifier (203 | 11/27/2008 |
| 20080284522 | 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 sec... | 11/20/2008 |
| 20080159756 | 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 voltage. The configurable amplifier may be capable of being configured to u... | 07/03/2008 |
| 20080106338 | 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 volt... | 05/08/2008 |
| 20080074197 | 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 boost t... | 03/27/2008 |
| 20080074198 | 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 voltage; ... | 03/27/2008 |
| 20080074196 | 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 has a ... | 03/27/2008 |
| 20080007344 | DC Offset Cancellation For A Trans-Impedance Amplifier The invention relates to a DC offset cancellation circuit for a trans-impedance amplifier, which is typically used for converting an input current from a photodiode into an output voltage. The DC offset cancellation circuit utilizes the monitor current from a photodiode... | 01/10/2008 |
| 20080007343 | Tuning A Trans-Impedance Amplifier A trans-impedance amplifier has a front-end circuit including a transistor and collector resistor for setting the open-loop gain of the feedback circuit. The collector resistor, when connected directly to the power supply, has a secondary function of defining the curren... | 01/10/2008 |
| 20080001676 | 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 cir... | 01/03/2008 |
| 20070285174 | High-frequency circuit of reduced circuit scale A high-frequency circuit is provided. In the high-frequency circuit, a first PIN diode is provided in a signal line and a second PIN diode is provided between the signal line and ground so that an attenuating circuit is formed. A power supply is applied to one end of a ... | 12/13/2007 |
| 20070229172 | 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 is pr... | 10/04/2007 |
| 20070210872 | 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. ... | 09/13/2007 |
| 20070164825 | Reduced-size sensor circuit The present invention relates to circuits configured for implementation in sensors, sensors employing such circuits, and methods of operating and manufacturing such sensors and/or circuits. In at least some embodiments, the circuit includes a capacitor having a first in... | 07/19/2007 |
| 20070152756 | Transimpedance amplifier using negative impedance compensation A transimpedance amplifier (TIA) with negative impedance compensation is disclosed, which comprises a TIA element and a negative impedance compensator connected to the output terminal of the TIA element. There are various designs capable of implementing the negative imp... | 07/05/2007 |
| 20070146080 | Burst-Mode TIA (Trans-Impedance Amplifier) Devices and methods for processing signals using a Burst-Mode TIA that meets EPON and GPON specifications are disclosed herein. A signal provided by a power detector is processed with the appropriate gain by using a gain selector which includes a feedback circuit to cho... | 06/28/2007 |
| 20070115068 | 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 optimizat... | 05/24/2007 |
| 20070109056 | Amplifier circuit, and system incorporating same In one embodiment, a current source circuit having a reference resistor produces first, second and third bias currents that vary with manufacturing variances of the current compensation resistor. An input amplification stage includes a transconductance stage biased by t... | 05/17/2007 |
| 20070096013 | 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 light-... | 05/03/2007 |
| 20070069822 | Device for measuring very short current pulses The invention relates to the measurement of current pulses that are very brief (a few nanoseconds) and of very low amplitude (a few microamps), such as those that can emanate from a photodetector used for the optical transmission of data at very high speed, or from a ph... | 03/29/2007 |
| 20060290432 | Direct current offset canceling circuit of trans-impedance amplifier and automatic gain control trans-impedance amplifier thereof A direct current (DC) offset canceling circuit of a trans-impedance amplifier and an automatic gain control trans-impedance amplifier is provided, including: a trans-impedance amplifier for receiving an input current and converting the input current into a first voltage... | 12/28/2006 |
| 20060244541 | Methods and apparatus for precision limiting in transimpedance amplifiers A transimpedance amplifier is provided including an input, an amplifier and a non-linear limiting circuit. The input is configured to provide an input current which includes a logic high range between a minimum input current and a maximum input current for logic high. T... | 11/02/2006 |
| 20060226913 | 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 conne... | 10/12/2006 |
| 20060220747 | Light receiving amplifier circuit and optical pickup device having the same In a light receiving amplifier circuit, a dummy amplifier has an identical structure with an IV amplifier except that the dummy amplifier is not connected to a light receiving element and includes a capacitor, i.e., a band limiting capacitor. Further, the capacitor is c... | 10/05/2006 |
| 20060220746 | Sensing circuit A sensing circuit capable of detecting very low current pulses of the order of 10's and 100's of micro amps. The sensing circuit comprises a common gate amplification stage capable of amplifying a sensed current, a comparison stage having as an input the amplified sense... | 10/05/2006 |
| 20060202766 | Transimpedance amplifier with signal amplification circuit that performs power signal regulation The transimpedance amplifier that performs signal amplification includes a first input that receives an input signal, a second input that receives a power signal, a third input that receives a control signal, and an output that generates an output signal. The transimped... | 09/14/2006 |
| 20060202765 | Construction and use of preamps having discrete gain states In one embodiment, the linear gain region of a preamp is widened by performing the following actions within the preamp: converting a received input current to a first voltage; in accordance with one of a plurality of discrete gain states, amplifying the first voltage to... | 09/14/2006 |
| 20060186959 | Low-consumption voltage amplifier A low consumption voltage amplifier including a transistor, a first current generator that supplies power to the drain of the transistor, a second current generator that charges the source of the transistor, the current output by the second current generator being subst... | 08/24/2006 |
| 20060170504 | Photodiode integrated circuit having multiple gain states Disclosed herein is a PhotoDiode Integrated Circuit (PDIC) having multiple gain states. The PDIC includes a current-voltage conversion unit, an input amplification stage circuit, a reference resistance unit, a feedback resistance unit, and a switching unit. The current-... | 08/03/2006 |
| 20060109057 | Amplifier circuit and light receiving apparatus An amplifier 11 to which transistors 13 and 14 functioning as variable resistors are connected in parallel is used. A burst signal is received by a light receiving element 10 and the received signal is converted into an input current signal I... | 05/25/2006 |
| 20060103472 | Light receiving amplification circuit A light receiving amplification circuit according to the present invention includes: a light receiving element (101); an amplification circuit which amplifies a photoelectric current generated by the light receiving element and outputs from an amplification stage... | 05/18/2006 |
| 20060103471 | Preamplifier A preamplifier includes a negative-feedback amplifier circuit that converts a current signal from a photodetector into a voltage signal; and a conversion-gain control circuit that simultaneously controls a resistance value of a feedback resistor portion of the negative-... | 05/18/2006 |
