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:
May. 10, 2005
Filed:
Oct. 15, 2001
Syuuji Matsuura, Ikoma, JP;
Syuuji Matsuura, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A received signal passed through an HPF is supplied to an input switching circuit where the signal is switched to any of HIGH BAND, MID BAND and LOW BAND circuitry. The received signal of each band circuitry is band-switched by an RF amplification input BPF, RF-amplified by an RF amplifier and then a resultant received signal is supplied from an RF amplification output BPF. The received signal is mixed with a local oscillation signal from a local oscillator circuit by a mixer circuit to generate an intermediate-frequency signal. The intermediate-frequency signal is supplied to a first IF amplifier circuit, a SAW filter and a second IF amplifier circuit. A PLL channel select circuit outputs a switching voltage for each band and conduct PLL control for the local oscillator circuit.