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:
Dec. 28, 1999
Filed:
Nov. 17, 1997
Telefonaktiebolaget L/M Ericsson, Stockholm, SE;
Abstract
An antenna switch for selectively connecting an output differential signal pair of an output power amplifier to a single-ended signal of an antenna when transmitting and selectively connecting an input differential signal pair of a low noise input amplifier to the single-ended signal of the antenna when receiving. A first balun having a single ended-signal connected to an antenna connects a first and second output differential signal to a power output amplifier. A second balun having a single-ended signal connected to the antenna connects a first and second input differential signal to a low noise input amplifier. A first diode selectively shorts the first output differential signal to the second output differential signal of the first balun when receiving and a second diode selectively shorts the first input differential signal to the second input differential signal of the second balun when transmitting.