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Jing Jung Tang

Feng Lu

Leung Chiu

Xiao Sheng Chen

Li Tang

Yihong Tang

An electronic oscillator circuit and a method for controlling an oscillation frequency of a ring oscillator circuit. The circuit includes a plurality of inverter stages each Including an inverter and a trans-resistance switch circuit configured to switch on the inverter during an operation of the electronic oscillator circuit thereby facilitating the inverter to generate an inverter output signal in response to an inverter input signal fed to the inverter; wherein the inverters in the plurality of the inverter stages are connected to form a ring oscillator circuit.

Electronic oscillator circuit and a method for controlling an oscillation frequency of a ring oscillator circuit

A voltage comparator circuit for a power source having an energy harvester and an energy storage. The circuit comprises a first voltage input node and a second voltage input node arranged to respectively receive a first voltage level of a first output of the energy harvester and a voltage level of a second output of the energy storage; an output node arranged to switch in response to a comparison of the first and second first voltage levels; and a plurality of semiconductor junction devices arranged to provide a floating local ground arranged to vary in response to a change of the first and/or the second voltage level, wherein the floating local ground has a voltage level higher than an absolute ground connected to the voltage comparator circuit; wherein the floating local ground is arranged to prevent a breakdown of circuit components due to a voltage difference connected at terminals of each of the circuit component exceeding a breakdown voltage of the respective circuit component.

Voltage comparator circuit for use with an energy harvester

A fluid-tight envelope () encloses an RFID chip (), a first array of conductors (-) on an internal surface (), and a second array of conductors (-) fixed to an opposing internal surface () of a flexible outer wall () of the envelope (). The outer wall () is urged inwardly by ambient pressure to press the conductors of the second array (-) into electrical contact with the conductors of first array (-) to thereby form an antenna (). Fluid pressure in the chamber () that holds the antenna () tends to displace the outer wall () outwardly to thereby separate conductors of the first and second arrays (--).

Microwave-tolerant RFID tag

There is provided an antenna for a radio frequency identification (RFID) tag, which includes a loop antenna, an amplifying antenna, an additional antenna structure to modify impedance of the entire antenna. The additional antenna structure has a first electromagnetic coupling with the amplifying antenna and a second electromagnetic coupling with the loop antenna.

RFID antenna, RFID tag and RFID system

A radio frequency communication device and its use for a transportation system. The radio frequency communication device includes a supporting member, through which the device is arranged to attach to a cylindrical structure; and a conductive planar portion arranged to removably secure on the supporting member, the conductive planar portion includes a conductive loop being electrically connected in between the conductive planar portion and the supporting member, arranged to generate a radio frequency radiation; wherein the supporting member includes multiple flat portions arranged to fit the radio frequency device onto the cylindrical structure.

Radio frequency communication device and its use for a transportation system

An accessory for a tag device and a RFID tagging device using the accessory. The accessory includes a tag holder defining with a slot arranged to receive the tag device and to removably secure the tag device in a predetermined position; and an antenna provided on the tag holder, wherein the antenna has a radiator arranged to couple to a feeder of the tag device when the tag device is positioned in the predetermined position within the slot.

Accessory for a tag device and a tag device using the same

A rotary engine is provided, comprising a stator and a rotor rotatably connected thereto. A stator holder with an annular recessed variable track guide groove is on each end of the stator. A sidewall, close to the rotor, of the stator is provided with an arc-shaped combustible gas groove, a combustible gas inlet, a ring-shape groove, a combustion chamber, a decompression device and an exhaust gas outlet. A compression-resistant element is provided in the ring-shape groove. The rotor is provided with a combustible gas piston chamber having a combustible gas piston, a slider slot having slider, and gas exchange channels. The sliders on the same generating line on the rotor and the combustible gas piston are connected fixedly to the same sliding rod in a sliding rod groove, and the two ends of the sliding rod extend into the annular recessed variable track guide groove of the corresponding stator holder.

Growing community of inventors

Hong Kong, China

Jing Jung Tang