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:
Apr. 17, 2001
Filed:
Mar. 20, 1998
Applicant:
Inventor:
Byeong-Ha Park, Kyunggi-do, KR;
Assignee:
Samsung Electronics Co., Ltd., Suwon, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03D 3/24 ;
U.S. Cl.
CPC ...
H03D 3/24 ;
Abstract
A PLL-based CMOS fractional-N frequency synthesizer, which has an on-chip LC Voltage Controlled Oscillator. A higher-order discrete sigma-delta modulator is used in the fractional-N frequency synthesizer resulting in a strong attention at low frequencies for quantization noise. The synthesizer employs a noise shaping method to suppress fractional spurs using the high-order sigma-delta modulator.