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Class Information
Number: 250/214A
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controlled circuit > Special photocell or electron tube circuits > Amplifier type
Description:










Sub-classes under this class:

Class Number Class Name Patents
250/214LA Light amplifier type 180


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Patent Number Title Of Patent Date Issued
6660991 Method and apparatus for measuring a low power signal Dec. 9, 2003
6660990 Optical amplification and receiving system and method Dec. 9, 2003
6658217 Optical receiver Dec. 2, 2003
6649902 Summing the output of an array of optical detector segments in an atomic force microscope Nov. 18, 2003
6639473 Method and/or apparatus for controlling a common-base amplifier Oct. 28, 2003
6633028 Anti-blooming circuit for CMOS image sensors Oct. 14, 2003
6624405 BIST for testing a current-voltage conversion amplifier Sep. 23, 2003
6617567 Analog pre-processor with improved input common mode range Sep. 9, 2003
6614312 Low noise amplifier and imaging element using same Sep. 2, 2003
6608710 Automatic gain control circuit and optical receiver Aug. 19, 2003
6597245 Preamplifier Jul. 22, 2003
6593810 2.5 Gigabits-per-second transimpedance amplifier Jul. 15, 2003
6590455 Common-base amplifier with high input overload and/or tunable transimpedance Jul. 8, 2003
6587003 Charge sensitive preamplifier with pulsed source reset Jul. 1, 2003
6587004 Signal amplifier and optical signal receiver using the same Jul. 1, 2003
6583400 Multichannel receiver circuit for parallel reception Jun. 24, 2003
6580063 Solid state imaging device having high output signal pain Jun. 17, 2003
6576883 Non-linear gain compensation for optical scanners Jun. 10, 2003
6573789 Signal processing circuit for floating signal sources using positive feedback Jun. 3, 2003
6552605 Differential transimpedance amplifier for optical communication Apr. 22, 2003
6552324 Selectable pixel amplifier for use in a photosensor array Apr. 22, 2003
6548802 Optical receiver zero calibration system and method Apr. 15, 2003
6545257 Thermal-electrically cooled photodetector Apr. 8, 2003
6538245 Amplified CMOS transducer for single photon read-out of photodetectors Mar. 25, 2003
6531925 Heterojunction bipolar transistor optoelectronic transimpedance amplifier using the first transistor as an optical detector Mar. 11, 2003
6528777 Optical power meter derived from common-mode voltage of optical transimpedance amplifier Mar. 4, 2003
6525858 Optical receiver and optical network system using thereof Feb. 25, 2003
6518558 Color image sensor for short-time exposure Feb. 11, 2003
6515272 Method and apparatus for improving signal to noise ratio of an aerial image monitor Feb. 4, 2003
6512221 Image sensor chip with an integrated operational amplifier and its application in a CIS module Jan. 28, 2003
6504141 Adaptive amplifier circuit with enhanced dynamic range Jan. 7, 2003
6501064 Image sensor with active sensor elements Dec. 31, 2002
6498334 Infrared transreceiver with isolated analog output Dec. 24, 2002
6489603 Method for calibrating a photoelectric cell Dec. 3, 2002
6479810 Light sensor system and a method for detecting ambient light Nov. 12, 2002
6462327 Analog optical receiver and variable gain transimpedance amplifier useful therewith Oct. 8, 2002
6459078 Image sensor utilizing a low FPN high gain capacitive transimpedance amplifier Oct. 1, 2002
6456141 Current pulse receiving circuit Sep. 24, 2002
6455837 Photodetector apparatus Sep. 24, 2002
6448860 Device for converting small currents impressed at the input of the device by a non-ideal electric source of current into voltage signals Sep. 10, 2002
6444970 Miniature low-noise photodiode system Sep. 3, 2002
6437320 Optical amplifier control unit, optical amplification apparatus, and transmission system Aug. 20, 2002
6437309 Photoelectric transducer Aug. 20, 2002
6437308 Light detection circuit of an electronic device Aug. 20, 2002
6426494 Optical signal detector and optical signal detecting method Jul. 30, 2002
6417503 Optical sensor circuit with output changing means Jul. 9, 2002
6403943 Variable resistance circuit, operational amplification circuit, semiconductor integrated circuit, time constant switching circuit and waveform shaping circuit Jun. 11, 2002
6396614 Optical signal receiving circuit and method for receiving optical signal May. 28, 2002
6396351 Preamplifier circuit for a photodetector May. 28, 2002
6384689 Preamplifier for optical receivers May. 7, 2002

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16










 
 
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