Class / Patent application number | Description | Number of patent applications / Date published |
324098000 | Balancing (e.g., known/unknown voltage comparison, bridge, rebalancing) | 18 |
20090201010 | PUMPING VOLTAGE DETECTOR - A pumping voltage detector includes a first division voltage generating unit for dividing a pumping voltage at a first division ratio to generate a first divided voltage, a second division voltage generating unit for dividing the pumping voltage at a second division ratio different from the first division ratio to generate a second divided voltage, and a detection signal generating unit for comparing one of the first and second divided voltages with a reference voltage to generate a pumping voltage detection signal. | 08-13-2009 |
20100007331 | SELF-BALANCING FREQUENCY DETERMINING BRIDGE - A self-balancing Wheatstone bridge that provides frequency and power information. The frequency information obtained can be applied to correct the power measurement to provide excellent match, excellent frequency insensitivity, good dynamic range, good frequency range, and adequate frequency accuracy. The system is highly responsive, simple, and cost effective. | 01-14-2010 |
20100007332 | METHOD AND APPARATUS FOR EVALUATING RAPID CHANGES IN CURRENT - In order to detect and evaluate changes in current as a result of electric arcs, a sensor signal, differentiated on the basis of time, is produced with a sensor-dependent frequency bandwidth whose upper cutoff frequency is 40 MHz and whose lower cutoff frequency is 100 kHz. The sensor signal is taken and an evaluation signal is produced with an upper cutoff frequency of less than or equal to 10 MHz. The evaluation signal is compared with a threshold value and a normalized signal is produced, and a pulse duration of the signal is extended to a prescribed time value. | 01-14-2010 |
20100219809 | APPARATUS - An apparatus can be coupled to at least two lines for transmitting a differential signal, which is substantially symmetrical to a predefined reference potential, and/or for receiving such a differential signal. The apparatus includes a balancing unit, which can be coupled to the at least two lines and which includes a center tap. A monitoring unit is coupled to the center tap on the input side and is configured such that it monitors a center tap voltage between the center tap and the predefined reference potential and detects errors if the center tap voltage is greater than a predefined threshold value. | 09-02-2010 |
20100253321 | CURRENT INTEGRATOR WITH WIDE DYNAMIC RANGE - The invention relates to a determination circuit for measuring a current. The invention also relates to a method for measuring a current using such a determination circuit and to a computer program product adapted, when being executed by a processor, to integrate a current using such a determination circuit. According to the invention an integration circuit comprising the determination circuit is reset each time the integration value of the current exceeds the threshold until expiration of a predefined maximum integration time. The invention increases the accuracy of integrating a current and also increases the dynamic range of currents that can be integrated. To further increase the dynamic range of currents as can be integrated the determination circuit may comprise circuits having different gain factors. | 10-07-2010 |
20110248699 | CALIBRATION APPARATUS AND METHOD THEREOF, MULTI-CHANNEL DRIVING CIRCUIT AND CURRENT BALANCING METHOD - A calibration method for adjusting an offset voltage of a unit is proposed. The unit, capable of operating in a calibration mode or a normal mode, includes a first input terminal, a second input terminal and an output terminal. The calibration method includes: operating the unit in a calibration mode; providing a programmable voltage to the first input terminal; providing a constant voltage to the second input terminal; adjusting the programmable voltage monotonously when an output status of the output terminal is not changed; latching the programmable voltage when the output status toggles; and operating the unit in a normal mode after the output status toggles. | 10-13-2011 |
20120235666 | VOLTAGE DETECTING APPARATUS AND LINE VOLTAGE DETECTING APPARATUS - A voltage detector detects a detected AC voltage generated in a detected object, and includes a detection electrode that is disposed facing the detected object, and an integrating circuit including an operational amplifier that has a first input terminal set at a reference voltage and a second input terminal connected to the detection electrode that integrates a detection current and outputs the integrated signal whose amplitude changes in accordance with the potential difference. The voltage detector also includes an insulating circuit that inputs the integrated signal and outputs the inputted integrated signal so as to be electrically insulated from an input side, and a voltage generating circuit that amplifies a signal based on the integrated signal so as to reduce the potential difference and generate the reference signal. | 09-20-2012 |
20130181697 | MEMS-BASED VOLTMETER - An electromechanical system (MEMS) voltmeter. An exemplary MEMS voltmeter includes a proof mass mounted to a substrate in a teeter-totter manner. The MEMS voltmeter also includes an input voltage plate located on the substrate under a first end of the proof mass. The first input voltage plate receives a voltage from a device under test. A drive voltage plate is located on the substrate under a second end of the proof mass. A first sense input voltage plate is located on the substrate under the first end of the proof mass. A second sense voltage plate is located on the substrate under the second end of the proof mass. A rebalancing circuit receives signals from the proof mass and the first and second sense voltage plates and generates a voltage value that is equal to the root mean square (RMS) voltage of the device under test. | 07-18-2013 |
20130214762 | MEASUREMENT BRIDGE IN A PRINTED CIRCUIT BOARD - A measurement bridge, in particular for a network analyzer, including a reference port, a central output port and a balun having a first balun input connector and a first and a second balun output connector. The first balun output connector is connected to a first signal path and the second balun output connector is connected to a second signal path. The central output port is connected to the first signal path, and the reference port is connected to the second signal path. The electrical parameters of the first signal path and the second signal path are approximately the same. | 08-22-2013 |
20130285641 | GROUND OFFSET MONITOR AND COMPENSATOR - Methods and systems are described for monitoring and compensating an offset between a reference voltage used in a first device and a corresponding reference voltage used in a second device. The first device can include offset circuitry. The offset circuitry receives two voltage signals. The first voltage signal is equal to a first voltage value that is used as a reference voltage in the first device. The second voltage signal can be a time-varying voltage signal that has a known relationship with a second voltage value that is used as a reference voltage in the second device. The offset circuitry can then determine the second voltage value from the second voltage signal, and output an offset value based on a difference between the first voltage value and the second voltage value. | 10-31-2013 |
20140111186 | IMPEDANCE SOURCE RANGING APPARATUS AND METHOD - An impedance sourcing circuit for a measurement device configured to measure a device under test (DUT) and method are disclosed. The impedance sourcing circuit includes a voltage/current source. An electrically controlled variable resistance having a control input is configured to adjust the variable resistance is coupled to the DUT. A loop gain controller is coupled to the control input of the electrically controlled variable resistance. The loop gain controller is configured to drive the control input of the electrically controlled variable resistance to adjust the variable resistance to generally match the impedance of the DUT. The impedance sourcing circuit may also include a voltage detector configured to detect a voltage across the DUT and a voltage reference. The loop gain controller may be configured to drive the control input of the electrically controlled variable resistance based on the voltage detected across the DUT and the voltage reference. | 04-24-2014 |
20160131687 | CURRENT SENSOR AND SMART METER - A full bridge circuit comprises first to fourth magnetic resistance elements. The first and fourth magnetic resistance elements have a first polarity, while the second and third magnetic resistance elements have a second polarity. A comparison circuit compares a first value indicating a difference between a potential of a first connecting node and a first potential and a second value indicating a difference between a potential of a second connecting node and a second potential to determine presence/absence of an external magnetic field. An initial magnetization vector of a magnetization free layer of the first magnetic resistance element is the reverse of that of a magnetization free layer of the second magnetic resistance element. An initial magnetization vector of a magnetization free layer of the third magnetic resistance element is the reverse of that of a magnetization free layer of the fourth magnetic resistance element. | 05-12-2016 |
20160154031 | DEVICE FOR CORRECTING THE VOLTAGE OFFSET OF A WHEATSTONE BRIDGE | 06-02-2016 |
324099000 | Automatic | 5 |
20090153179 | CIRCUIT ARRANGEMENT FOR BALANCING A RESISTANCE CIRCUIT - A circuit arrangement is provided for balancing a resistance circuit, which has a field-effect transistor as a controllable resistor and a control circuit, by which the field-effect transistor can be controlled with a gate-source voltage so that there is a resistance between a drain electrode and a source electrode of the field-effect transistor in a predefinable ratio to a reference resistor. In a balancing operation mode, a reference current can be set by the drain-source path of the field-effect transistor and by the reference resistor, which depends on a differential voltage between a voltage drop, caused by the reference current at the reference resistor and a voltage drop, caused by the reference current, at the drain-source path of the field-effect transistor. | 06-18-2009 |
20110050278 | SYSTEM FOR AND METHOD OF VIRTUAL SIMULTANEOUS SAMPLING WITH A SINGLE ADC CORE - Voltage balancing in multi-cell battery packs is improved by estimating instantaneous voltages on the cells. In accordance with one embodiment, an apparatus for reading voltages from multiple voltage sources includes a first multiplexer coupled to multiple voltage sources and a controller. The controller is programmed to output from the first multiplexer a sequential pair of voltages read from each of the multiple voltage sources. The multiple sequential pairs of voltages all have a common midpoint in time. The multiple sequential pairs of voltages are all read within a small time window, such as 100 microseconds. In one embodiment, the multiple voltage sources are Li-ion or other high-voltage cells, though other types of cells can also be used. | 03-03-2011 |
20110128034 | SELF-BALANCING FREQUENCY DETERMINING BRIDGE - A self-balancing Wheatstone bridge that provides frequency and power information. The frequency information obtained can be applied to correct the power measurement to provide excellent match, excellent frequency insensitivity, good dynamic range, good frequency range, and adequate frequency accuracy. The system is highly responsive, simple, and cost effective. | 06-02-2011 |
20140306733 | VOLTAGE DETECTING APPARATUS AND LINE VOLTAGE DETECTING APPARATUS - A voltage detecting apparatus detects a detected AC voltage generated in a detected object, and includes a detection electrode that is disposed facing the detected object, a detection unit that operates on a floating power supply generated with a voltage of a reference voltage unit as a reference and outputs a detection signal, and a standard signal outputting unit that outputs a standard signal to the reference voltage unit. The voltage detecting apparatus also includes an insulating unit that inputs the detection signal and outputs an insulated detection signal, a feedback control unit that amplifies the insulated detection signal, and a signal extracting unit that amplifies the insulated detection and outputs a signal component as an output signal. | 10-16-2014 |
20150316586 | SYSTEMS AND METHODS FOR HIGH VOLTAGE BRIDGE BIAS GENERATION AND LOW VOLTAGE READOUT CIRCUITRY - A multi voltage sensor system includes one or more charge pumps, a sensor bridge and readout circuitry. The one or more charge pumps are configured to provide a high voltage. The sensor bridge is biased by the high voltage and is configured to provide sensor values. The readout circuitry includes only low voltage components. The readout circuitry is configured to receive the sensor values. | 11-05-2015 |