Title:
シミュレーションベースのフィードバックを有するディジタルPWMアンプ
Document Type and Number:
Japanese Patent JP5139321
Kind Code:
B2
Abstract:
Systems and methods for performance improvements in digital switching amplifiers using simulation-based feedback. In one embodiment, a digital pulse width modulation (PWM) amplifier includes a signal processing plant configured to receive and process an input audio signal. The amplifier also includes a simulator configured to model processing of audio signals by the plant. The outputs of the plant and the simulator are provided to a subtractor, the output of which is then added to the input audio signal as feedback. The plant may consist of a modulator and power switch, a noise shaper, or any other type of plant. An analog-to-digital converter (ADC) may be provided to convert the output audio signal to a digital signal for input to the subtractor. Filtering may be implemented before or after the ADC, and a decimator may be placed after the ADC if it is an oversampling ADC.
Inventors:
Andersen, Jack, Bee.
Craven, Peter
Cost, Michael, A.
Chen, Daniel, El. W.
Hand, rally, e.
Taylor, Wilson, Yi.
Craven, Peter
Cost, Michael, A.
Chen, Daniel, El. W.
Hand, rally, e.
Taylor, Wilson, Yi.
Application Number:
JP2008548859A
Publication Date:
February 06, 2013
Filing Date:
December 28, 2006
Export Citation:
Assignee:
D2 Audio Corporation
International Classes:
H03F3/217; H03F1/32
Domestic Patent References:
| JP200693766A | ||||
| JP200586611A | ||||
| JP2004538701A |
Foreign References:
| US6373334 | ||||
| WO2001097384A2 |
Attorney, Agent or Firm:
Mieko Kashihara
Goichi Takahashi
Masahito Shibata
Goichi Takahashi
Masahito Shibata