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. 02, 2003
Filed:
Feb. 18, 2000
Mitsuhiko Inaguma, Nisshin, JP;
Masprodenkoh Kabushikikaisha, Nisshin, JP;
Abstract
A down-converter comprises a frequency division circuit, PLL, and local oscillation circuit to convert a signal from a reference oscillation circuit to a converting reference signal with a constant frequency, and uses this signal to frequency-convert an in-building upward signal to an upward signal able to be transmitted in an external bi-directional CATV system. When the frequency of the converting reference signal deviates from the frequency of the converting reference signal on the side of an up-converter for converting the upward signal to the in-building upward signal on a terminal side, the upward signal cannot be accurately restored. Therefore, the down-converter uses the frequency division circuit to convert the converting reference signal to a transmitting reference signal with a low frequency, and outputs the transmitting reference signal to the terminal side.