Zhenhua Wang
Zhenhua Wang, Zurich CH
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20080272838 | Self-Calibration of Continuous-time Filters and Systems Comprising Such Filters - A continuous-time filter system comprises a master control unit and a slave unit with one or more slave filters. The master control unit includes an integrator having circuit elements which match those elements of the slave filter that define the slave filter's time constant. The master control unit further includes a voltage comparator connected to an output of the integrator, the voltage comparator providing an output frequency signal, and a phase frequency comparator providing a control signal as an output signal, the phase frequency comparator receiving said output frequency signal and a reference frequency signal as input signals. The slave unit includes said at least one slave filter, the slave filter having a control signal input for receiving said control signal thus allowing to calibrate the slave filter's transfer function by influencing the slave filter's time constant. | 11-06-2008 |
20090233570 | RECEIVER FRONT-END WITH LOW POWER CONSUMPTION - A receiver includes a mixer with a first input, a second input and one output. An input signal (S | 09-17-2009 |
20110101936 | LOW DROPOUT VOLTAGE REGULATOR AND METHOD OF STABILISING A LINEAR REGULATOR - A low dropout (LDO) voltage regulator comprises a regulating element ( | 05-05-2011 |
Zhenhua Wang, Embrach CH
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20100289553 | SEMI-ADAPTIVE VOLTAGE SCALING FOR LOW-ENERGY DIGITAL VLSI-DESIGN - A semi-adaptive voltage scaling method and device for determining minimal supply voltages for digital electronic semiconductor circuitry, e.g., microprocessors, of electronic devices under production testing and “real” operating conditions. The SAVS operates in a closed-loop during a production test phase of the circuitry and in an open-loop mode in an application (operation) phase of the semiconductor circuitry. During production testing, a lowermost level of the supply voltage for the semiconductor circuitry is determined at one single defined temperature at which operating specifications of the circuit are met. The lowermost level is stored in a dedicated electronic memory of the circuitry together with temperature dependent parameters. Afterwards, when the digital electronic circuitry is operated in a “real” application, e.g., a mobile phone, the device and method reads the previously measured and proven data from the memory and regenerates the minimum level of supply voltage for the circuitry, taking into account the actual temperature of the application. As a result, the digital semiconductor circuitry in the “real” application is supplied with a minimum level of supply voltage, whereby specified parameters of the circuitry are met. Thus, a power consumption of the circuitry is advantageously reduced to a minimum. | 11-18-2010 |
20100289564 | ELECTRONIC DEVICE AND A METHOD OF BIASING A MOS TRANSISTOR IN AN INTEGRATED CIRCUIT - An electronic device has at least one integrated circuit with at least one MOS transistor. An adaptive analog biasing unit is configured to provide an adaptive biasing current for the at least one MOS transistor biased in the saturation region. The adaptive analog biasing unit (AAB) may be on the same chip together with the integrated circuit and may comprise a process monitor unit configure to extract a device parameter of the integrated circuits and a calculation unit configured to generate a bias current based on the output of the process monitor unit. The bias current generated by the calculation unit may be inversely proportional to the extracted device parameter. | 11-18-2010 |
20120139520 | Linear Regulator and Electronic Device Comprising Such a Linear Regulator - The invention relates to a linear regulator comprising input means configured to receive an input voltage, output means configured to deliver an output voltage, a shunt element coupled to said input means and said output means, and configured to be passed through by a current and to exhibit across its terminals a voltage drop independent of said current, controllable by-pass means coupled between said input means and said output means, and configured to have a first state for by-passing said shunt element and a second state for not by-passing said shunt element, and control means coupled to said input means and configured to place said by-pass means in their first state or in their second state depending on the value of said input voltage. The invention also relates to an electronic device comprising such a linear regulator. | 06-07-2012 |
Zhenhua Wang, Emrach CH
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20100271126 | MATCHED INTEGRATED ELECTRONIC COMPONENTS - A switchable integrated electronic device includes at least three elements r | 10-28-2010 |
Zhenhua Wang, Eindhoven NL
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20100019746 | CONVERTER WITH PARALLEL COUPLED DIFFERENTIAL INPUT PAIRS - A circuit ( | 01-28-2010 |
Zhenhua Wang, Zuerich CH
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20080309307 | High Voltage Power Switches Using Low Voltage Transistors - A switching regulator having first and second power switches. The first power switch has at least two transistors connected in series, the transistors having a first maximum voltage across their terminals which is less than the input voltage of the regulator. The transistors have at least a first node at the point where they are connected, and a first control circuit controls the voltage at the first node so that the voltages across the terminals of the transistors of the first power switch do not exceed the first maximum voltage. The second power switch also has at least two transistors connected in series, the transistors having a maximum voltage across their terminals that is less than the input voltage. The transistors have at least a second node at the point where they are connected, and a second control circuit controls the voltage at the second node so that the voltages across the terminals of the transistors of the second power switch do not exceed the second maximum voltage. | 12-18-2008 |
20090039861 | REFERENCE VOLTAGE GENERATOR PROVIDING A TEMPERATURE-COMPENSATED OUTPUT VOLTAGE - The present invention concerns a reference voltage generator ( | 02-12-2009 |
20090051340 | LINEAR TRANSCONDUCTOR FOR A ONE-CYCLE CONTROLLER, NOTABLY FOR A DC-DC SWITCHING CONVERTER - A linear transconductor (LT), for instance for a one-cycle controller (OC), comprises i) an operational amplifier (OA) having non-inverting (+) and inverting (−) inputs, a power supply input intended to be connected to a DC voltage (V | 02-26-2009 |
20090115539 | INTEGRATED RC OSCILLATOR WITH HIGH FREQUENCY STABILITY, NOTABLY FOR AN INTEGRATED SWITCHED-MODE POWER SUPPLY - An integrated oscillator ( | 05-07-2009 |
Zhenhua Wang, Clemson, SC US
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20130262001 | State Estimation for Power System Using Hybrid Measurements - A method determines voltages of buses of a power system. Values the voltages include a magnitude and a phase angle. The buses of the power system are grouped in a first area and a second area based on a type of measurement associated with each bus. The first area and the second area have at least one common bus, and wherein at least one bus in the first area is associated with a first type of measurement, and at least one bus in the second area is associated with a second type of measurement. Next, the method determines sequentially voltages of the buses of the first and the second areas. | 10-03-2013 |
20140236506 | Method for Detecting Power Theft in a Power Distribution System - A method detects power theft in a branch of a distribution system by distinguishing between technical losses that are inevitable during the course of normal operation of the system, and non-technical losses that can be attributed to power theft. The method assumes a specific circuit corresponding to that branch, collects data for energy consumed and currents at regular intervals by means of a smart or traditional power meter, estimates the likely resistances of the lines connecting the consumption points to the distribution transformed by means of least squares regression, and uses the estimated resistances to predict technical losses in future time intervals. By comparing the total power losses measured during future intervals with the estimates of the technical losses, the amount of non-technical losses can be estimated, and theft can be signaled when this amount is unusually high. | 08-21-2014 |
Zhenhua Wang, Beijing CN
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20130277556 | NUCLIDE IDENTIFICATION DEVICE - The present invention discloses a nuclide identification device, comprising: an upper casing portion; a lower casing portion, detachably combined with the upper casing portion to form a cavity; and a key circuit portion for performing nuclide identification, housed in the cavity and positioned between the upper casing portion and the lower casing portion, wherein a gap between the upper casing portion and the lower casing portion is sealed by a first waterproof structure. Compared with the prior art, the present nuclide identification device is capable of using in environment requiring to be waterproof and dustproof, so as to make a detection on the radioactive material in the environment. | 10-24-2013 |
Zhenhua Wang, Shanghai CN
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20140067461 | System and Method for Predicting Customer Attrition Using Dynamic User Interaction Data - A method, system and non-transitory computer-readable medium for predicting customer attrition are provided. The method can include executing code to load historical data relating to a customer into a database to create a customer history summary file. The method can include executing code to load daily data relating to the customer into a scoring engine. The method can include programmatically processing, via the scoring engine, at least one of the historical data and the daily data to generate an attrition score. The attrition score can indicate a predictive signal of attrition of the customer. | 03-06-2014 |