Title:
CLASS-D AMPLIFIER
Document Type and Number:
Japanese Patent JP2008125004
Kind Code:
A
Abstract:
To provide a data processing apparatus such as a class-D amplifier circuit reducing manufacturing costs by reducing a size and the number of components, and improving operability by facilitating waveform setting or adjustment with flexibility in constructing a system.
A class-D amplifier 100 is adapted to generate cosine wave data with which an output voltage of an LPF 190 is not rapidly changed, as a PWM signal for the LPF 190 during a starting period or an ending period, apply noise shaping and modulate the cosine wave data into a PWM signal while selectively switching them with inputted data such as sound data to be amplified, and output the signal to the LPF 190.
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Inventors:
NISHIOKA NAOTOSHI
MORISHIMA MORIHITO
MORISHIMA MORIHITO
Application Number:
JP2006309485A
Publication Date:
May 29, 2008
Filing Date:
November 15, 2006
Export Citation:
Assignee:
YAMAHA CORP
International Classes:
H03F1/00; H03F3/217; H03M5/08; H03M7/32
Attorney, Agent or Firm:
Akira Obayashi
Yashiro Hitoshi
Taro Takahashi
Yashiro Hitoshi
Taro Takahashi