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. 04, 2000
Filed:
Jun. 23, 1998
Teruo Sasaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a demodulating device which comprises an orthogonal transforming circuit, an up-converting circuit, a pulse signal producing circuit, and a low-pass filter, the orthogonal transforming circuit orthogonally transforms a received frequency shift keying signal to produce a first base band signal and a second base band signal. A phase converting circuit converts a clock signal from a clock signal producing circuit to produce a first clock signal having a first phase and a second clock signal having a second phase. A first EXOR circuit receives the first base band signal and the first clock signal to produce a first EXOR output signal. A second EXOR circuit receives the second base band signal and the second clock signal to produce a second EXOR output signal. A mixing circuit mixes the first EXOR output signal and the second EXOR output signal to produce and supply an up-converted signal to the pulse signal producing circuit.