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:
Nov. 05, 2002
Filed:
Apr. 03, 2001
Applicant:
Inventor:
Jae-ho Park, Yongin, KR;
Assignee:
Samsung Electronics Co., Ltd., Suwon, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/00 ;
U.S. Cl.
CPC ...
H03L 7/00 ;
Abstract
A frequency modulator having variable carrier frequency is provided. A VCO frequency-modulates an oscillator input signal using an oscillation frequency set by a set signal as the carrier frequency. A phase/frequency detector outputs phase and frequency differences between a VCO output signal and a reference signal. A filter receives a phase/frequency detector output and generates the set signal. An amplifier generates a pair of output signals whose voltage levels change in opposite directions. A compensation circuit changes the voltage levels of the output signal pair and provides resulting signals to the VCO as the oscillator input signal.