POWER AMPLIFICATION DEVICE

Title:

POWER AMPLIFICATION DEVICE

Document Type and Number:

WIPO Patent Application WO/2003/096527

Kind Code:

A1

Abstract:

A D class power amplifier (1) performs high-speed switching of a power source voltage V_DD in response to a digital audio signal P_in which has been input, so as to power amplify the digital audio signal P_in and supply the amplified signal to a loudspeaker (2). Moreover, the D class power amplifier can be arranged, for example, in a so-called AM receiver formed as a unitary block with an AM tuner (3) for AM broadcast reception and reduce the affect of reception disturbance to the AM tuner (3). Thus, it is possible to provide a power amplification device capable of suppressing unnecessary radiation and reducing the reception disturbance to the tuner by controlling the drive signal generation method instead of changing the carrier frequency.

Inventors:

OHKURI KAZUNOBU (JP)
MASUDA TOSHIHIKO (JP)

Application Number:

PCT/JP2003/005576

Publication Date:

November 20, 2003

Filing Date:

May 01, 2003

Export Citation:

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Assignee:

SONY CORP (JP)
OHKURI KAZUNOBU (JP)
MASUDA TOSHIHIKO (JP)

International Classes:

H03F3/217; H03F3/30; H04B15/06; (IPC1-7): H03F3/217

Foreign References:

JP2000196376A	2000-07-14
JPH0715248A	1995-01-17
JPH0629757A	1994-02-04
EP1014566A2	2000-06-28

Other References: