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:
Mar. 23, 2004
Filed:
Jun. 30, 2000
John D. Gillis, Tewksbury, MA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A balanced power amplifier for radio frequencies. The power amplifier may be switched from operating in a saturation mode, so that AMPS-type radio telephone signals may be optimally amplified, to a linear mode so that CDMA signals may be amplified. A directional coupler splits an input signal into quadrature signal components which are supplied to the input of a pair of dual mode power amplifiers. The output signals from the dual mode amplifiers are recombined in a directional coupler. The directional coupler effectively applies all of the output power to an antenna connected to one of the coupler ports, and effectively isolates the output stages of the amplifiers from any reflected power generated by the antenna.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile