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:
Jul. 24, 2001
Filed:
Mar. 24, 1998
Mao-Shen Wang, Hsin-Tien City, Taipei Hsien, TW;
Jui-Hung Hsu, Hsin-Tien City, Taipei Hsien, TW;
Other;
Abstract
A learning-type remote control device is capable of detecting both carrier frequency and control code in a remote control signal that is transmitted by a target remote control device, and includes a variable-frequency oscillating unit for generating a carrier signal having a frequency which varies according to magnitude of a frequency control signal from a digital-to-analog converting unit, a mixing unit for generating a mixed signal by mixing the carrier signal and the remote control signal, a signal detecting unit for generating a detected frequency signal and a detected control signal from the mixed signal, and a processing unit operable in a learning mode to provide a varying frequency count input to the converting unit. The processing unit detects lower and upper sideband frequency counts based on when the detected frequency signal from the signal detecting unit reaches a preset threshold voltage to determine a frequency count that corresponds to the carrier frequency of the remote control signal. The processing unit further determines the control code in the remote control signal from the detected control signal of the signal detecting unit, and stores the frequency count and the control code determined thereby in a memory unit.