Title:
CLASS-D AMPLIFIER
Document Type and Number:
Japanese Patent JP2006109039
Kind Code:
A
Abstract:
To provide a class-D amplifier in which a peak level of harmonic noise derived from a switching operation in a power switch and electromagnetic wave interference is suppressed.
A random number triangular wave generation means 12 generates triangular waves having periods which change like random numbers and a comparison means 13 generates a PWM signal based on the triangular waves generated by an analog sound signal AI and the triangular waves generated by the random number triangular wave generation means 12. A power switch means 4 receives the PWM signal generated by the comparison means 13 and performs power amplification. A filter means 5 performs PWM demodulation using output of the power switch means 4 as input.
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Inventors:
TSUJI MASAYUKI
TAURA KENICHI
NAKADA TAKESHI
ISHIDA MASAYUKI
TAURA KENICHI
NAKADA TAKESHI
ISHIDA MASAYUKI
Application Number:
JP2004292265A
Publication Date:
April 20, 2006
Filing Date:
October 05, 2004
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H03F3/217; H03K7/08
Domestic Patent References:
| JP2005229306A | 2005-08-25 | |||
| JPH0673912U | 1994-10-18 | |||
| JPH02177606A | 1990-07-10 | |||
| JP2002252970A | 2002-09-06 | |||
| JPH0643192A | 1994-02-18 | |||
| JP2004266780A | 2004-09-24 |
Attorney, Agent or Firm:
Minoru Maeda
Youichi Yamagata
Youichi Yamagata