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. 11, 2000
Filed:
Jan. 21, 1998
Yuji Umemoto, Tokyo, JP;
Yoshiro Yoshimura, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A dual mode radio communication apparatus according to the invention has a reception speech signal output circuit for processing an analog demodulation signal in an analog mode and a digital demodulation signal in a digital mode by means of a common signal processing circuit, thereby outputting reception speech signals, respectively. In the dual mode radio communication apparatus, a level variable circuit is provided across a signal path extending between a demodulated signal input terminal of a reception speech signal output circuit and a speaker. The level variable circuit determines whether the analog mode or the digital mode is set as the radio communication mode. If the analog mode is set, the gain of the level variable circuit is set to a first value for compensating for a level deviation in the analog demodulation signal. If the digital mode is set, the gain of the level variable circuit is set to a second value for preventing excessive suppression of the digital demodulation signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile