The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 16, 2003
Filed:
Mar. 18, 2002
Applicant:
Inventors:
Sun-Hee Park, Yongin, KR;
Sung-Chul Hong, Daejeon, KR;
Yong-Gyo Seo, Yongin, KR;
Ui-Sik Yoon, Daejeon, KR;
Sang-Min Nam, Anyang, KR;
Sang-Yoon Jeon, Seoul, KR;
Sang-Woong Yoon, Seoul, KR;
Assignee:
Samsung Electronics Co., Ltd., Kyungki-do, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/12 ;
U.S. Cl.
CPC ...
H03B 5/12 ;
Abstract
A differential type VCO (Voltage Controllable Oscillator) is disclosed. The VCO has a differential amplifier having a couple of transistors and a couple of LC tanks. At each LC tank, a transformer is connected to form a buffer. An oscillating signal is output through the buffer with no power consumption. Additionally, a capacitor is connected to the secondary coil of the transformer to form a bandpass filter, thereby attenuating a harmonic signal included in the oscillating signal.