Browsing by Author "Cheng Stone"

Now showing 1 - 4 of 4

Current limit circuit apparatus
(2014-05-27)
Chen Tsung-Lin
;
Chang Edward Yi
;
Chieng Wei-Hua
;
Cheng Stone
;
Jeng Shyr-Long
The present invention provides a current limit circuit apparatus, coupled with the gate of a GaN transistor. The current limit circuit comprises a diode, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor and a fourth resistor. The source and the drain of the first transistor couple with the diode. The source of the second transistor couples with the gate of the first transistor. The source of the first transistor couples with the first transistor. The source of the second transistor couples with the second resistor. The third resistor couples with the fourth resistor and the gate of the first transistor. The first transistor turned off and the gate current is limited. When the current of the gate of the GaN transistor exceeds the predetermined value, the breakdown voltage is increased by limiting the gate current.
EMBEDDED INDUSTRIAL CONTROLLER WITH BICYCLE FRAME SHAPE
(2013-11-14)
Tseng Yung-Sheng
;
Shih Ching-Wei
;
Jeng Shyr-Long
;
Chang Edward-Yi
;
Chang Chia-Hua
An embedded industrial controller with a bicycle frame shape is disclosed. The embedded industrial controller includes a casing with the bicycle frame shape having an upper tube, a lower tube, a front fork, a rear lower fork, a rear upper fork and a base tube, a motherboard, a battery module, a power electrical port and a plurality of input and output electrical ports. The embedded industrial controller with a bicycle frame shape of the present invention has significantly improved functions than the conventional industrial controller, and further meets the conventional requirements such as dust proof, vibration proof, and heat dissipation.
High-side driver circuit
(2013-11-12)
Chen Tsung-Lin
;
Chang Edward Yi
;
Chieng Wei-Hua
;
Cheng Stone
;
Jeng Shyr-Long
The present invention provides a high-side driver circuit including a power transistor, the first transistor, the second transistor, the second capacitor, the second diode, a start-up circuit. The start-up circuit is coupled between a resistor and the second capacitor to complete a gate driving circuit. And, the aforementioned resistor can either be the gate resistance of the power transistor or an external resistor. The design of start-up circuit enables the functionality of the bootstrap capacitor of being charged to a designate voltage level. Thus, the depletion-mode transistor can be controlled to turn on/off without a floating voltage source or a negative voltage source.
SUN TRACKING MECHANISM
(2015-05-14)
Chang Edward-Yi
;
Chieng Wei-Hua
;
Jeng Shyr-Long
;
Cheng Stone
;
Lue Binhan
A sun tracking mechanism is provided for solar power generation, including a power unit, a linear actuator and at least two universal joints. The sun tracking mechanism outputs an angle of high precision by two axial directions provided from the universal joints, the power unit and the linear actuator. A solar power module disposed on the sun tracking mechanism generates electricity in the best light incident angle. In addition, the linear actuator provides an auxiliary supporting force to improve the wind-resistant capability.