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:
Jan. 08, 2002
Filed:
May. 11, 1998
Koji Asahi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A receiving apparatus includes a counter for counting for a prescribed period of time the number of bits having one of two different levels, out of bits forming a digital signal which is entered and having the two different levels, and supplying a count signal, a bit rate detector for calculating the bit rate of the digital signal from the count signal and supplying a multiplying factor selection signal, a differentiating circuit, into which the input digital signal is entered, for supplying a pulse signal at a varying point of the input digital signal, a rectifying circuit for accomplishing full-wave rectification of the pulse signal, and supplying a rectified pulse signal, a band-pass filter for passing harmonics of the clock component of the input digital signal contained in the rectified pulse signal, and a frequency dividing circuit, into which the harmonics are entered, for frequency-dividing the harmonics by a ratio set on the basis of the multiplying factor selection signal, and supplying a resultant frequency-divided clock signal.