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:
Oct. 20, 1998
Filed:
Mar. 19, 1997
Sang-Bok Lee, Seoul, KR;
SamSung Electronics Co., Ltd., Suwon, KR;
Abstract
A frequency converter capable of providing a highly stable frequency by frequency feedback using a phase locked loop circuit. The frequency converter includes a local oscillator; a frequency converter for mixing an output of the local oscillator and a feedback frequency therefrom to generate a mixed frequency; a first filter for filtering the mixed frequency; a phase comparator for generating a voltage signal corresponding to a phase difference in between an input frequency to the frequency convertor and the output frequency of the first filter; a second filter for converting the voltage signal of the phase comparator to a constant polarity voltage and eliminating any noise component of the converted voltage signal; and a voltage controlled oscillator receiving the output of the second filter as a control voltage so as to provide a stable output frequency by generating the feedback frequency responsive to the control voltage.