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. 01, 2001
Filed:
Nov. 17, 1998
Yasuaki Namura, Kanagawa, JP;
Atsushi Tsuchida, Shizuoka, JP;
Junichi Takada, Kanagawa, JP;
Hiroshi Ohnishi, Tokyo, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A portable radio device including a frequency synthesizer,for producing a local signal for radio section, a digital control circuit,for digitally controlling a portion of or the entirety of the radio device, and a reference signal generator,which operates the frequency synthesizer and the digital control circuit, wherein a buffer amplifier,is provided between the reference signal generator and the digital control circuit, and switching means,is provided in parallel with the buffer amplifier between the reference signal generator and the digital control circuit. When the frequency synthesizer is inactive, the switching means is activated, and a power supply,of the buffer amplifier is deactivated. As a result, the power dissipated by the buffer amplifier can be reduced without deteriorating the characteristics of the frequency synthesizer.