Rychen
Joerg Rychen, Zuerich CH
Patent application number | Description | Published |
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20120324608 | MOUNT FOR A SCANNING PROBE SENSOR PACKAGE, SCANNING PROBE SENSOR PACKAGE, SCANNING PROBE MICROSCOPE AND METHOD OF MOUNTING OR DISMOUNTING A SCANNING PROBE SENSOR PACKAGE - A mount for a scanning probe sensor package ( | 12-20-2012 |
Jörg Rychen, Zurich CH
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20080266153 | HIGH RESOLUTION DIGITAL ANALOG CONVERSION CIRCUIT - To increase the accuracy and resolution of an m bit digital analog converter, n bit input values with n>m are fed to a control circuit and converted to a series of control values for the digital analog converter using dithering techniques. When the series of control values straddles a major transition where a large number of bits are switched between 1 and 0, a corrected series of control values is retrieved from a calibration table. The corrected series takes into account the glitch effects observed at the output of digital analog converter at a major transition. | 10-30-2008 |
20090307809 | SCANNING PROBE MICROSCOPE AND METHOD FOR OPERATING THE SAME - The scanning probe microscope has a primary control loop ( | 12-10-2009 |
20100031404 | Scanning Probe Microscope With Periodically Phase-Shifted AC Excitation - The scanning probe microscope applies a sum of an AC voltage (Uac) and a DC voltage (Udc) to its probe. The frequency of the AC voltage (Uac) substantially corresponds to the mechanical oscillation frequency of the probe, but its phase in respect to the mechanical oscillation varies periodically. The phase modulation has a frequency fmod. The microscope measures the frequency (f) or the amplitude (K) of a master signal (S) applied to the probe's actuator, or it measures the phase of the mechanical oscillation of the cantilever in respect to the master signal (S). The spectral component at frequency fmod of the measured signal is fed to a feedback loop controller, which strives to keep it zero by adjusting the DC voltage (Udc), thereby keeping the DC voltage at the contact voltage potential. | 02-04-2010 |
Jörg Rychen, Zurich CH
Patent application number | Description | Published |
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20100031404 | Scanning Probe Microscope With Periodically Phase-Shifted AC Excitation - The scanning probe microscope applies a sum of an AC voltage (Uac) and a DC voltage (Udc) to its probe. The frequency of the AC voltage (Uac) substantially corresponds to the mechanical oscillation frequency of the probe, but its phase in respect to the mechanical oscillation varies periodically. The phase modulation has a frequency fmod. The microscope measures the frequency (f) or the amplitude (K) of a master signal (S) applied to the probe's actuator, or it measures the phase of the mechanical oscillation of the cantilever in respect to the master signal (S). The spectral component at frequency fmod of the measured signal is fed to a feedback loop controller, which strives to keep it zero by adjusting the DC voltage (Udc), thereby keeping the DC voltage at the contact voltage potential. | 02-04-2010 |
20110271412 | Method for Measuring a Piezoelectric Response by Means of a Scanning Probe Microscope - The piezoelectric response of a sample is measured by applying a scanning probe microscope, whose probe is in contact with the sample The probe is mounted to a cantilever and an actuator is driven by a feedback loop to oscillate at a resonance frequency f. An AC voltage with principally the same frequency f but with a phase (with respect to the oscillation) and/or amplitude varying periodically with a frequency fmod is applied to the probe for generating a piezoelectric response of the sample A lock-in detector measures the spectral components at the frequency fmod of the control signals (K, f) of the feedback loop. These components describe the piezoelectric response and can be recorded as output signals of the device. The method allows a reliable operation of the resonator at its resonance frequency and provides a high sensitivity. | 11-03-2011 |
20110296564 | SCANNING PROBE MICROSCOPE WITH CURRENT CONTROLLED ACTUATOR - The piezo-electric actuator ( | 12-01-2011 |
Philippe Rychen, Muespach-Le-Haut FR
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20080202944 | Method for Use of an Electrochemical Sensor and Electrodes Forming Said Sensor - A method for in situ self-calibrating of an electrochemical sensor for measuring the concentration of one or more species in an aqueous medium. The method includes: taking a first measurement of the current of a working electrode representative of the concentration of dissolved oxygen in the medium, applying an anode current of predetermined density and duration to a generating electrode to produce a defined increase in the local concentration of the dissolved oxygen, taking a second measurement of the current of the working electrode representative of the concentration of oxygen after applying the anode current to the generating electrode, and computing from the first and second measurements a calibration factor for one or more species that relates the oxygen concentration of the medium to be analyzed and the actually measured current between the working electrode and its counter electrode. | 08-28-2008 |
20080257720 | Electrode System for an Electrochemical Sensor - An electrode system for an electrochemical cell is provided, including a substrate, a measuring electrode connected to the substrate and formed from a number of electrically conducting and mutually connected microdisks, and a generating electrode formed from an electrically conducting sheet and having a diameter that is greater than that of the microdisks. In one implementation, the microdisks are provided in cavities in the substrate. | 10-23-2008 |
Stephane Rychen, Bern CH
Patent application number | Description | Published |
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20130272101 | DEVICE FOR SECURING A CELL BATTERY WITH IMPROVED CONTACT - Structure ( | 10-17-2013 |
20140016446 | WATCH DIAL SECURED TO A BOTTOM PLATE - Assembly comprising a watch dial ( | 01-16-2014 |
20140127952 | DEVICE FOR SECURING A CELL BATTERY WITH IMPROVED CONTACT - The present invent concerns a portable object comprising at least a middle part and a back cover for confining an electronic module, said electronic module including a plate provided with a housing arranged for receiving an electrical energy accumulator, said electronic module including at least one circuit with at least one electrical contact area, and a connecting contact member for providing an electrical connection between said accumulator and said at least one contact area, said contact member being elastically deformable. | 05-08-2014 |