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:
Apr. 02, 2019
Filed:
Jun. 09, 2016
Hitachi Kokusai Electric Inc., Tokyo, JP;
Kenya Tomaru, Tokyo, JP;
Manabu Nakamura, Tokyo, JP;
HITACHI KOKUSAI ELECTRIC INC., Tokyo, JP;
Abstract
An outphasing power amplifying device includes a switching signal generating circuit configured to generate a switching pulse signal for switching a class-D power amplifier from two types of sinusoidal wave generated based on amplitude and phase of a modulated wave to be transmitted. The switching signal generating circuit includes: a sin calculation unit and a cos calculation unit for converting phase information of the two types of sinusoidal wave into a quadrature format; a DA converter for converting the quadrature-format phase information; a first filter for removing an aliasing component from the analogue signal; an analogue quadrature modulator for generating a sinusoidal wave from the analogue signals by using a local signal; a second filter for allowing a radio frequency and a component in the vicinity thereof to pass therethrough; and a comparator for converting the sinusoidal wave into a switching pulse signal by comparison with a reference voltage.