Other

Dialog Semiconductor Gmbh

Sub-One Technology, Inc.

Diaglo Semiconductor Inc.

Duc Doan

Pengju Kong

Fuqiang Shi

Hien Huu Bui

Judy Sha

William John Boardman

Deepak Upadhyaya

Thomas B Casserly

Karthik Boinapally

Matthew MaMoody

Pankaj Jyoti Hazarika

Jianming Yao

David H Nguyen

Yimin Chen

Cong Zheng

Mengfei Liu

Xiaoyong Zhang

Xiaye Wang

John Shi

A flyback converter is provided with a controller that is configured to analyze the reflected feedback voltage waveforms to determine the presence of a ground connection fault for the auxiliary winding.

Auxiliary winding ground fault detection for isolated DC/DC converter

A method and apparatus for plasma enhanced chemical vapor deposition to an interior region of a hollow, tubular, high aspect ratio workpiece are disclosed. A plurality of anodes are disposed in axially spaced apart arrangement, to the interior of the workpiece. A process gas is introduced into the region. A respective individualized DC or pulsed DC bias is applied to each of the anodes. The bias excites the process gas into a plasma. The workpiece is biased in a hollow cathode arrangement. Pressure is controlled in the interior region to maintain the plasma. An elongated support tube arranges the anodes, and receives a process gas tube. A current splitter provides a respective selected proportion of a total current to each anode. One or more notch diffusers or chamber diffusers may diffuse the process gas or a plasma moderating gas. Plasma impedance and distribution may be controlled using various means.

Multiple anode plasma for CVD in a hollow article

A switching power converter is provided with an overvoltage protection circuit that softly switches on a power bus switch during a soft-start period responsive to a device connecting to a data cable for receiving power over a power bus coupled to the power bus switch.

Short circuit protection for data interface charging

An adaptive valley mode switching power converter is provided that switches on a power switch within valley periods of a resonant voltage oscillation for the power switch. Each valley period is determined with regard to a valley threshold voltage.

Adaptive valley mode switching

A switching power converter is provided that includes a detector to detect whether a controller power supply voltage has fallen below a threshold voltage during a dormant period in which a power switch is no longer cycling to deliver power to a load. In response to a detection of such a threshold crossing by the detector, a controller powered by the controller power supply voltage is configured to cycle the power switch to replenish the controller power supply voltage.

Regulation of the power supply voltage for a flyback converter controller

A method for estimating an output voltage of a power converter comprises sensing a voltage waveform representative of the output voltage; and detecting a first gap and a second gap. The first gap is between a time when the sensed voltage waveform crosses a first voltage reference and a time when the sensed voltage waveform crosses a second voltage reference at a voltage offset below the first voltage reference. The second gap is between a time when the sensed voltage waveform crosses a third voltage reference and a time when the sensed voltage waveform crosses the second voltage reference, the third voltage referenced at a predetermined voltage above the second voltage reference. Responsive to the first gap exceeding a threshold, a tracking error is computed based on the first gap; and responsive to the first gap not exceeding the threshold, the tracking error is computed based on the second gap.

Primary sensing of output voltage for an AC-DC power converter

A flyback converter is provided that includes a base driver for driving a base current into a base of a BJT power switch. The base driver is controlled so as to adaptively vary the base current across at least some of the pulses.

Adaptive BJT driver for switching power converter

A switching power converter is provided that detects an activity signal generated in response to load activity using an adaptively-declining threshold.

Adaptive reference voltage for switching power converters

Chemical vapor deposition for an interior of a hollow article with high aspect ratio

The invention provides traffic safety apparatus including light-to-frequency converters for monitoring the status of traffic signals and tail lights of same lane close proximity preceding vehicles and when dangerous or potentially dangerous conditions are detected, visually and/or audibly providing an alert signal to the driver. The monitored information can be real-time recorded in the drivers vehicle and if desired, transmitted by wireless to off-vehicle receivers. Recording the information in the vehicle establishes an operational history that can be important for such uses as accident reconstruction, whereas information transmitted by wireless can be recorded by entities such as law enforcement, thereby adding an additional measure of traffic safety as well as providing documentation of driving infractions.

Apparatus for monitoring traffic signals and alerting drivers

A water supply system for an apartment complex can include individual hot water conduits and cold water conduits for each apartment. Each conduit includes a water meter that enables the owner of the apartment complex to accurately determine the hot water usage and cold water usage of each apartment tenant. The meter system can also be used to locate leakage points in the water supply system, e.g. dripping faucets or continuously running toilets.

Water supply system for multiple dwelling units

Measurement, spacer and barricade warning tape

A mechanism for measuring the running time of an internal combustion engine includes a numerical display of the engine running hours, such that the owner of the engine can better determine the appropriate time for changing the engine lubrication oil. A chronometer is controlled by a switch responding sensitively to engine temperature or vibration, so that the chronometer is actuated only while the engine is working. The mechanism is incorporated into the handle of an oil dipstick, which enables the engine owner to check the chronometer at the same time as he/she is checking the engine oil level.

Mechanism for indicating when to change engine oil

A telephone mounting stand or display holder includes a base member having a plug for tight fitting frictional engagement into the finger sockets of a standard telephone and includes vertically extending support members supporting a generally outwardly opening U-shaped display holding frame having a plurality of slots for receiving and holding sheets of display material. The holder includes a hand grip of a similar configuration to that of the standard telephone formed in the base member, substantially co-extensive with the finger sockets of the standard telephone and further includes a business card holding rack of the back side thereof.

Growing community of inventors

Campbell, CA, United States of America

Duc Doan