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:
Jul. 28, 1998
Filed:
Nov. 22, 1995
Hiroshi Asazawa, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A radiocommunication system comprises an input/output stage section of the system, which includes a first and a second differential circuits each having a differential transistor pair and a current source for supplying operational current to each of the differential transistor pairs. The input pair of the first differential circuit is connected to the output pair of a transmitting section of the system to supply an output transmission signal through an antenna. The input of the second differential circuit is connected to the antenna and the output pair thereof are connected to the input pair of a receiving section of the system. Each of the current sources is implemented by a current mirror including a first transistor activated and inactivated by a changeover signal in a time shared control and a second transistor for supplying the operational current to a corresponding one of the differential transistor pairs. The changeover operation effected by the current sources provides advantages of a low insertion loss and a large signal-to-noise ratio.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile