Schwiderski
Frank Schwiderski, Heidelberg DE
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20110006749 | Startup circuit for bandgap voltage reference generators - Systems and methods to achieve a startup circuit of bandgap voltage reference generator circuits monitoring a current flow in the bandgap voltage reference generator circuit have been achieved. The startup circuit can operate at supply voltages of about one threshold voltage and is therefore appropriate for low voltage applications. The monitoring of a current through an electrical component inside the bandgap voltage reference generator circuit by replication the component branch in a scaled version saves power and does not disturb the normal operation of the current-mode bandgap voltage reference generator. The startup circuit invented can be applied for current-mode bandgap voltage reference generator circuits as well as for voltage-mode bandgap voltage reference generator circuits. | 01-13-2011 |
Frank Schwiderski, Mannheim DE
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20100170343 | ULTRASONIC SENSOR AND METHOD FOR DETERMINING A SEPARATION OF AN OBJECT FROM AN ULTRASONIC SENSOR - The invention relates to a method for determining a separation, spacing or distance of an object from an ultrasonic sensor, in which ultrasonic pulses are emitted by a transducing or sensing element and in which ultrasonic pulses reflected by the object are detected by the same transducing element. According to the invention, the method is characterized in that there is a spectral analysis of the signal detected by the transducing element, that the multiple echo frequency attributed to multiple echoes of the ultrasonic pulses is determined in the spectrum of the detection signal and that on the basis of the multiple echo frequency the separation of the object from the ultrasonic sensor is determined. The invention also relates to an ultrasonic sensor for determining the separation of an object. | 07-08-2010 |
Frank Schwiderski, Endingen DE
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20120068673 | Startup circuit for self-supplied voltage regulator - A startup circuit for starting up a self-supplied voltage regulator which initiates startup by applying a voltage from a voltage supply to the startup circuit thus causing a voltage at an output node to rise. This rise will start the operation of the differential amplifier of the voltage regulator. When the voltage at the output node has reached the desired final output voltage, the startup circuit disconnects from the voltage regulator. The criterion for switching off the startup circuit is determined by a comparator which compares the output current capability of the voltage regulator with its output current plus the startup current. Inputs to the differential amplifier, such as the reference voltage, derive their power from the output node. | 03-22-2012 |
Hans-Werner Schwiderski, Noerten-Hardenberg DE
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20100024569 | MAGNETOINDUCTIVE FLOW METER HAVING AN ELECTROMAGNET UNIT WHICH INCLUDES COMBINED MAGNETIC FLUX-CONCENTRATING MEANS - A magnetoinductive flow meter has an electromagnet unit which is mounted on an outside periphery of a measuring tube. The electromagnet unit can include magnetic flux-concentrating means and electric coils for generating a magnetic field which is oriented substantially perpendicular to the direction of flow of a measuring medium which flows through the measuring tube. The magnetic flux-concentrating means of the electromagnet unit can include ferrite pole cores each respectively associated with each one of the electric coils. A single magnet yoke composed of an electric sheet material can be connected to each ferrite pole core. The magnet yoke can surround the electric coils jointly in a clip-like manner. | 02-04-2010 |
20100122582 | METHOD FOR OPERATING A FLOWMETER - A method is disclosed for operating a flowmeter, such as an inductive flowmeter, in which a medium flows through a measuring tube, and an arrangement of electrodes are conductively connected to the medium. To determine a filling level in a simple and reliable manner, at least four electrodes are arranged in the measuring tube essentially in a half-circumferential region based on a cross section through the measuring tube. When at least one signal is fed in at one of the electrodes or at one of the electrode pairs, an electrical current is measured at an electrode or between an electrode pair. An electrical voltage is measured between at least one other electrode pair or with respect to a common connection to ground. When comparing measurements with two different electrode combinations, different voltage and current values are related to infer a diagnosis, such as a filling level in the tube, and/or an electrode coating, and/or an oblique installation, and/or a sedimentation at a bottom of the tube. The diagnosis can be used to correct a flow rate. | 05-20-2010 |
Hans-Werner Schwiderski, Norten-Hardenberg DE
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20100116065 | FLOWMETER - A flowmeter is provided to have a measuring tube, in or on which a measuring system is arranged. The flowmeter includes pinch seal sleeves which are arranged at both ends of the measuring tube for connecting the measuring tube to a process pipeline. According to an exemplary configuration, the pinch seal sleeves and/or the inner surfaces of the pinch seal sleeves are composed of an electrically insulating material and/or coated with an electrically insulating material. To make the device lighter in enable fast installation, the measuring tube can be made flangeless. | 05-13-2010 |