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:
Feb. 26, 2002
Filed:
Dec. 14, 1998
Sadao Igarashi, Fukushima-ken, JP;
Syuichi Tsuda, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A reception signal has a performance in which a disturbance signal level exceeds a reference line in IS-95 and in which a C/N of the whole of a reception signal level is satisfactory. A reception circuit comprises an RF amplifier for amplifying a variable gain of a reception signal, a bypass circuit connected in parallel to the RF amplifier and a control switching unit for switching a gain state of the RF amplifier and a connected state of the bypass circuit in response to a reception signal level, wherein the control switching unit sets a first operation state in which the RF amplifier is placed in an automatic gain amplified state and the bypass circuit is placed in a non-connected state when the reception signal level falls within the smallest range and increases with the lapse of time, the control switching unit sets a second operation state in which the RF amplifier is placed in a non-operable state and the bypass circuit is placed in a connected state when the reception signal level goes from the first range to a second range larger than the first range, and the control switching unit switches the RF amplifier and the bypass circuit from the second operation state to the first operation state when the reception signal level decreases with the lapse of time and reaches an intermediate level from the second range to the first range.