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公开(公告)号：DE69824398D1
公开(公告)日：2004-07-15
申请号：DE69824398
申请日：1998-06-26
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT
Abstract: A charge balance type of photodiode array uses parallel A/D conversion in each channel of the photodiode array. The charge caused by the photocurrent of a photodiode in each channel is removed in predetermined charge packets provided by a dumping circuit (37) and the binary encoded number of delivered charge packets corresponds to the actual photocurrent (Iph). Charge balance photodiode arrays have a wide variety of applications. It is therefore useful to adapt photodiode arrays to the specific requirements of an individual application. The intention therefore provides a photodiode array (11) having at least one switching circuit (33, 37 or 44) to vary signal processing parameters such as a gain factor g or an attenuation factor k. This improvement facilitates a multifunctional photodiode array for a plurality of different applications.
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公开(公告)号：DE69822459D1
公开(公告)日：2004-04-22
申请号：DE69822459
申请日：1998-09-10
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT
Abstract: In order to improve the noise performance of a charge balance type photodiode array by reducing error influences, e.g. due to offset voltages, flicker and/or thermal noise, on a desired signal a compensation circuit (33) is inserted in each channel of this array. The basic concept under lying this compensation circuit (30) is to effect a correlated double sampling method without any significant increase in space or power demand for the silicon chip of at least one channel of said photodiode array. Because the wanted signal is primarily an amount of charge, the compensating circuit (30) comprises a switchable compensating capacitor (Ccomp) to compensate an error contribution of the desired signal. In a first "calibration period" the compensating capacitor (Ccomp) is charged or discharged in dependence on the actual noise contribution. In a second compensation period the compensation capacitor (Ccomp) provides a voltage (Vc) which is used to correct a predetermined reference voltage (Vref) to insure compensation of the error contribution. These periods are synchronised to the charge balance technique used in connection with the photodiode array.
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公开(公告)号：DE69812596T2
公开(公告)日：2003-11-13
申请号：DE69812596
申请日：1998-06-26
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT
IPC: H04N5/3745 , H04N3/15 , G01J3/28
Abstract: Spectrometers often use a so called charge balance photodiode array. This type of photodiode array uses parallel A/D conversion in each channel of said photodiode array, whereby a charge provided by a photocurrent (Iph) is accumulated at a integrator circuit (35) and a dumping circuit (37) removes this charge by well defined charge packets to keep the system in balance. In order to expand the field of application of these photodiode arrays, a storage circuit is inserted to buffer a possible charge overflow caused by a light beam (2) of high intensity, as often occurs when flash light lamps are used in the spectrometers. The storage circuit comprises a capacitor (Cs) a current limiter (32) which linearly conducts the photocurrent (Iph) below a process limit defined by the saturation limit of the dumping circuitry (37) and which, above this limit, converts a photocurrent pulse into a constant overflow current (Iin) having a duration corresponding to the amplitude of the photocurrent pulse (Iph).
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公开(公告)号：DE112009001880T5
公开(公告)日：2012-08-30
申请号：DE112009001880
申请日：2009-07-22
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KILLEEN KEVIN P , KRAICZEK KARSTEN , KUDERER HUBERT
IPC: G01N30/74 , G01N27/447
Abstract: Ein Fluidtrennsystem (10) zum Trennen von Verbindungen eines Probenfluids in einer mobilen Phase weist einen Detektor (50) zum Detektieren der getrennten Verbindungen durch Senden eines optischen Anregungssignals in das Probenfluid und zum Empfangen eines Antwortsignals als Reaktion auf das optische Anregungssignal auf. Der Detektor (50) weist eine Lichtquelle (100) zum Senden eines Ausgangslichtstrahls (230) als optisches Anregungssignal auf. Die Lichtquelle (100) weist eine Vielzahl von lichtemittierenden Elementen (200, 200A, 200Z), die jeweils zum Emittieren eines Lichtstrahls (210, 210A1, 210A2, 210Z1, 210Z2) mit jeweils einer bestimmten Wellenlänge dienen, und ein Beugungselement (220) auf. Die Vielzahl der lichtemittierenden Elemente (200, 200A, 200Z) sind so angeordnet, dass die emittierten Lichtstrahlen (210, 210A1, 210A2, 210Z1, 210Z2), die in Abhängigkeit von ihrer jeweiligen Wellenlänge unter einem bestimmten Winkel auf das Beugungselement (220) auftreffen, durch das Beugungselement (220) zum Ausgangslichtstrahl (230) gebeugt werden.
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公开(公告)号：GB2473787A
公开(公告)日：2011-03-23
申请号：GB201100647
申请日：2009-07-22
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KILLEEN KEVIN , KRAICZEK KARSTEN , KUDERER HUBERT
Abstract: A fluid separation system (10) for separating compounds of a sample fluid in a mobile phase comprises a detector (50) adapted to detect separated compounds by pro viding an optical stimulus signal to the sample fluid and receiving a response signal to the optical stimulus signal. The detector (50) comprises a light source (100) adapted to provide an output light beam (230) as the optical stimulus signal. The light source (100) comprises a plurality of light emitting elements (200, 200A, 200Z) each adapted to emit a light beam (210, 210A1, 210A2, 210Z1, 210Z2) having a respective wavelength„ and a diffracting element (220). The plurality of light emitting elements (200, 200A, 200Z) are arranged that emitted light beams (210, 210A1, 210A2, 210Z1, 210Z2) impinging, on the diffracting element (220) are diffracted by the diffracting element (220) to form the output light beam (230).
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Patent Agency Ranking
公开(公告)号：DE60035984T2
公开(公告)日：2007-11-29
申请号：DE60035984
申请日：2000-06-27
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT , TEITZ KONRAD , HADBAWNIK DETLEV
Abstract: A method of reducing the effects of varying environmental conditions, such as varying temperature, on the measuring results in a measuring instrument, is disclosed as well as a corresponding measuring instrument using the method, for example an optical detector. The measuring instrument comprises a measuring unit (20) with components which are sensitive to varying environmental conditions , and is characterized in that the measuring unit (20) is thermally insulated by a thermal barrier (41) such that the effects of variations in the environmental conditions on sensitive components are substantially reduced, but dissipated heat generated within the measuring unit can still leave the measuring unit, and that the temperature in the measuring unit (20) is controlled by means of a control loop comprising a temperature sensor (37), a heater (36) and a fan (34) to influence the temperature in the measuring unit (20) in such a way that the temperatures at locations with sensitive components are kept substantially constant.
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公开(公告)号：DE69824398T2
公开(公告)日：2005-08-04
申请号：DE69824398
申请日：1998-06-26
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT
Abstract: A charge balance type of photodiode array uses parallel A/D conversion in each channel of the photodiode array. The charge caused by the photocurrent of a photodiode in each channel is removed in predetermined charge packets provided by a dumping circuit (37) and the binary encoded number of delivered charge packets corresponds to the actual photocurrent (Iph). Charge balance photodiode arrays have a wide variety of applications. It is therefore useful to adapt photodiode arrays to the specific requirements of an individual application. The intention therefore provides a photodiode array (11) having at least one switching circuit (33, 37 or 44) to vary signal processing parameters such as a gain factor g or an attenuation factor k. This improvement facilitates a multifunctional photodiode array for a plurality of different applications.
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公开(公告)号：DE69812596D1
公开(公告)日：2003-04-30
申请号：DE69812596
申请日：1998-06-26
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT
IPC: H04N5/3745 , H04N3/15 , G01J3/28
Abstract: Spectrometers often use a so called charge balance photodiode array. This type of photodiode array uses parallel A/D conversion in each channel of said photodiode array, whereby a charge provided by a photocurrent (Iph) is accumulated at a integrator circuit (35) and a dumping circuit (37) removes this charge by well defined charge packets to keep the system in balance. In order to expand the field of application of these photodiode arrays, a storage circuit is inserted to buffer a possible charge overflow caused by a light beam (2) of high intensity, as often occurs when flash light lamps are used in the spectrometers. The storage circuit comprises a capacitor (Cs) a current limiter (32) which linearly conducts the photocurrent (Iph) below a process limit defined by the saturation limit of the dumping circuitry (37) and which, above this limit, converts a photocurrent pulse into a constant overflow current (Iin) having a duration corresponding to the amplitude of the photocurrent pulse (Iph).
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公开(公告)号：DE60035984D1
公开(公告)日：2007-09-27
申请号：DE60035984
申请日：2000-06-27
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT , TEITZ KONRAD , HADBAWNIK DETLEV
Abstract: A method of reducing the effects of varying environmental conditions, such as varying temperature, on the measuring results in a measuring instrument, is disclosed as well as a corresponding measuring instrument using the method, for example an optical detector. The measuring instrument comprises a measuring unit (20) with components which are sensitive to varying environmental conditions , and is characterized in that the measuring unit (20) is thermally insulated by a thermal barrier (41) such that the effects of variations in the environmental conditions on sensitive components are substantially reduced, but dissipated heat generated within the measuring unit can still leave the measuring unit, and that the temperature in the measuring unit (20) is controlled by means of a control loop comprising a temperature sensor (37), a heater (36) and a fan (34) to influence the temperature in the measuring unit (20) in such a way that the temperatures at locations with sensitive components are kept substantially constant.
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公开(公告)号：DE69822459T2
公开(公告)日：2005-01-20
申请号：DE69822459
申请日：1998-09-10
Applicant: AGILENT TECHNOLOGIES INC
Inventor： KUDERER HUBERT
Abstract: In order to improve the noise performance of a charge balance type photodiode array by reducing error influences, e.g. due to offset voltages, flicker and/or thermal noise, on a desired signal a compensation circuit (33) is inserted in each channel of this array. The basic concept under lying this compensation circuit (30) is to effect a correlated double sampling method without any significant increase in space or power demand for the silicon chip of at least one channel of said photodiode array. Because the wanted signal is primarily an amount of charge, the compensating circuit (30) comprises a switchable compensating capacitor (Ccomp) to compensate an error contribution of the desired signal. In a first "calibration period" the compensating capacitor (Ccomp) is charged or discharged in dependence on the actual noise contribution. In a second compensation period the compensation capacitor (Ccomp) provides a voltage (Vc) which is used to correct a predetermined reference voltage (Vref) to insure compensation of the error contribution. These periods are synchronised to the charge balance technique used in connection with the photodiode array.
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