| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 330308000 | Including atomic particle or radiant energy impinging on a semiconductor | 7 |
| 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 second gain path, the first gain path configured to amplify the input signal when the first gain path is at a lower input impedance relative to the second gain path and the second gain path configured to amplify the input signal when the second gain path is at a lower input impedance relative to the first gain path. A feedback circuit includes a first circuit that detects a low frequency component of the output signal. The feedback circuit further includes a second circuit that is driven by the low frequency component of the output signal and is connected with the forward transimpedance circuit such that the second circuit uses an average optical device current to at least partially control when the input signal is amplified by the first gain path and when the input signal is amplified by the second gain path. | 11-20-2008 |
| 20080290952 | Dvd Reading Apparatus - A photodiode ( | 11-27-2008 |
| 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 current signal by photoelectric conversion of an input optical signal; a Transimpedance Amplifier (TIA) for converting the current signal input from the photodiode into a voltage signal; an auto gain adjustor for adjusting feedback resistances of the transimpedance amplifier; a photodiode parallel capacitor reducer for reducing a parallel capacitor current of the photodiode; and a bandwidth adjustor for reducing a range of an increase/decrease in bandwidth according to an increase/decrease in gain of the transimpedance amplifier. | 02-26-2009 |
| 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 high precision while a transimpedance amp and a limiter amp can be integrated on one chip. The optical receiver-amplifier comprises a photodiode, a transimpedance amp for amplifying an output signal of the photodiode, and a DC current compensating circuit connected in parallel with the transimpedance amp for compensating for a DC-current component of an output current of the differential amp. | 02-25-2010 |
| 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 burst signal with a small input level is received, a transimpedance amplifier | 12-01-2011 |
| 20130135054 | TRANS-IMPEDANCE AMPLIFIER WITH ENHANCED DYNAMIC RANGE BUT INVARIABLE INPUT IMPEDANCE - A trans-impedance amplifier (TIA) for an optical receiver is discloses, in which the TIA enhances the dynamic range thereof but suppresses the variation of the input impedance thereof. The TIA enhances the dynamic range by subtracting the photocurrent input therein, which varies the input impedance. The TIA also provides the variable gain amplifier with a feedback resistor. The variable gain of the amplifier compensates the variation of the input impedance due to the current subtraction. | 05-30-2013 |
| 20130229236 | OPTICAL RECEIVER BASED ON A DECISION FEEDBACK EQUALIZER - An optical receiver, a method of operating an optical receiver, a correction based transimpedance amplifier circuit, and a method of adjusting an output of a transimpedance amplifier. In one embodiment, the optical receiver comprises an optical-to-electrical converter, a transimpedance amplifier, and a correction circuit. The optical-to-electrical converter is provided for receiving an optical signal and converting the optical signal to an electrical signal. The transimpedance amplifier is provided for receiving the electrical signal from the converter and for generating from the electrical signal an amplified electrical signal. The amplified electrical signal has inter symbol interference resulting from a reduced bandwidth of the transimpedance amplifier. The correction circuit is provided for receiving the electrical signal from the amplifier and for generating, from the electrical signal, an output signal including corrections for the inter symbol interference in the amplified electrical signal effectively increasing a bandwidth of the optical receiver. | 09-05-2013 |
