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:
May. 17, 2011
Filed:
Sep. 21, 2006
Takeshi Ikeda, Ohta-ku, JP;
Hiroshi Miyagi, Yokohama, JP;
Takeshi Ikeda, Ohta-ku, JP;
Hiroshi Miyagi, Yokohama, JP;
Ricoh Co., Ltd., Tokyo, JP;
Abstract
There are included an LPF () and an HPF () that are connected in parallel to the output of a pre-emphasis circuit (). There is also included a gain adjusting circuit () that performs a gain adjustment of low-pass filter with respect to the frequency band to be passed through the HPF (). The low frequency components of the frequency band of baseband signals outputted from the pre-emphasis circuit () pass through the LPF (), while the high frequency components pass through the HPF (). As to the outputs from the HPF (), the gain of especially the higher part of the frequency band components to be passed through the HPF () is suppressed by the gain adjusting circuit (), whereby the amplitudes of the baseband signals can be limited only for the high frequency range without using a limiter and further the peak values of the baseband signals can be inhibited from exceeding the maximum frequency deviation.