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Friedel
Friedel Gerfers, Mountain View, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20090078044 | Ultra-low noise MEMS piezoelectric accelerometers - Sensing structures are provided which are designed using non-conventional designs. These sensing structures have improved sensitivity and noise floor at low frequencies. | 03-26-2009 |
| 20090085785 | DIGITAL-TO-ANALOG CONVERTER CALIBRATION FOR MULTI-BIT ANALOG-TO-DIGITAL CONVERTERS - According to some embodiments, a sigma-delta analog-to-digital converter includes a junction, to receive the analog signal along with a feedback signal, and a loop filter coupled to the junction. An n-bit analog-to-digital converter, coupled to the loop filter, may provide the digital output of the sigma-delta analog-to-digital converter. In addition, an n-bit feedback digital-to-analog converter, with a plurality of cells, may receive the digital output and generate the feedback signal, wherein the feedback converter is associated with at least one calibration digital-to-analog converter. | 04-02-2009 |
| 20090241666 | PIEZOELECTRIC SENSOR DYNAMIC RANGE IMPROVEMENT - A MEMS piezoelectric sensor comprises a plurality of capacitors some of which may be used for sensing and others used for feedback. The capacitors may be switched to connect or disconnect selected capacitors from the sensor. Embodiments convert a two port sensor into a four port sensor without significant changes in hardware design and improve SNR and correct for offset and out-of-axis errors due to process mismatch and variations. | 10-01-2009 |
Friedel Gerfers, Duisburg DE
| Patent application number | Description | Published |
|---|---|---|
| 20080252507 | Integrating Analog to Digital Converter - An integrating analog to digital converter (ADC) is disclosed that comprises a Delay Locked Loop (DLL) ( | 10-16-2008 |
| 20090219983 | DATA COMMUNICATION CIRCUIT WITH EQUALIZATION CONTROL - An adaptive equalizer comprises an adjustable equalizer circuit that allows to enhance the frequency dependence of contents of the transmitted signals which suffer from losses in the connected transmission channel. A blind equalization tuning procedure is proposed that operates without knowledge about the characteristic of transmission channel. Phase positions of transitions in the equalized signal are detected. A digital post-processing circuit evaluates a measure for spread of the detected phase positions of transitions, accumulated over a plurality of the symbol periods. The digital post-processing circuit controls the adjustable equalizer, setting the adjustable equalizer to a setting wherein the detected spread is minimized. | 09-03-2009 |
Friedel Theissen, Erkelenz DE
| Patent application number | Description | Published |
|---|---|---|
| 20080202629 | Two-Step-Process for Filling Gas Containers for Airbag Systems and Gas Filling Device for a Two-Step-Filling Process - The invention concerns a process respectively a device for filling a high pressure gas container ( | 08-28-2008 |
| 20100071387 | Method And Device For Cooling A Liquid - The method for cooling a liquid ( | 03-25-2010 |