Browsing by Author "Kuo"

Now showing 1 - 6 of 6

Circuit and method for implementing frequency tripled I/Q signals
(2010-11-23)
Kuo
;
Chien-Nan
;
Chen
;
Huan-Sheng
A circuit and a method for implementing frequency tripled I/Q signals are proposed, including receiving two input I/Q signals through frequency multipliers so as to generate two frequency multiplied signals and mixing the input I/Q signals and the corresponding frequency multiplied signals through mixers for generating and outputting two I/Q signals with a frequency three times that of the input I/Q signals. The invention eliminates the requirement for high amplitude of the input signals as in the prior art and has lower power consumption and broader bandwidth and can be used as high frequency signal sources in any single chip processes.
Indazole compounds
(2010-11-02)
Sun
;
Chung-Ming
;
Kuo
;
Min-Liang
This invention relates to indazole compounds of formula (I) or (II) shown below. Each variable in formula (I) or (II) is defined in the specification. These compounds can be used to treat cancer.
Light-emitting device and method for making the same
(2011-02-15)
Chiu
;
Ching-Hua
;
Huang
;
Hung-Wen
;
Kuo
A light-emitting device is capable of emitting a light having a wavelength ranging from 300 to 550 nm, and includes: a substrate; a p-type semiconductor layer disposed on the substrate; an active layer disposed on the p-type semiconductor layer; a n-type semiconductor layer disposed on the active layer and having a waveguide-disposing surface; and a waveguide structure formed on the waveguide-disposing surface of the n-type semiconductor layer and having a plurality of spaced apart nanorods extending from the waveguide-disposing surface.
Method for promoting light emission efficiency of LED using nanorods structure
(2009-09-15)
Huang
;
Hung-Wen
;
Lu
;
Tien-Chang
;
Chiu
Method for the light emitting diode (LED) having the nanorods-like structure is provided. The LED employs the nanorods are subsequently formed in a longitudinal direction by the etching method and the PEC method. In addition, the plurality of the nanorods is arranged in an array so that provide the LED having much greater brightness and higher light emission efficiency than the conventional LED.
Miniature inductor suitable for integrated circuits
(2009-05-12)
Kuo
;
Chien-Nan
;
Ma
;
Chien-Chia
A miniature inductor suitable for integrated circuits comprises a semiconductor substrate having a coplanar strip line and a plurality of metal-insulator-metal (MIM) capacitors, wherein the plurality of MIM capacitors are connected between the transmission lines of the coplanar strip line in parallel, and the coplanar strip line connected with the MIM capacitors further comprises a crossed planar strip line structure or a shifted planar strip line structure. The present invention reduces the occupied area for an inductor by adding the MIM capacitors and folding the transmission lines, and alleviates the quality factor degradation of the inductor caused by substrate loss.
Ultra broad-band low noise amplifier utilizing dual feedback technique
(2008-03-04)
Fu
;
Chang-Tsung
;
Kuo
;
Chien-Nan
This invention relates to a low noise amplifier, used in radio frequency integrated circuit design, especially low noise amplifiers for ultra broad-band wireless communication, comprising at least a transistor of the core circuit of a low noise amplifier structure, a transformer that is implemented on the chip, in order to form a dual feedback amplifier, that is, an amplifier structure comprising an inductive feedback and a capacitive feedback, wherein the capacitive feedback is used for the low and medium frequency range, while the inductive feedback is used for the high frequency range. By assembling an amplifier circuit with these two feedback paths, it is possible to provide a broadband and good impedance matching at the signal input end of the circuit. The low noise amplifier circuit structure of the present invention is able to provide optimal conditions for broadband input impedance matching and broadband noise optimum; besides significantly increasing the gain and gain flatness, there are also huge improvements to the noise performance and the cost-down on fabrication, and the energy consumption can also be maintained at a very low level.