Title:
デジタルパルス幅制御式振動モジュレータ
Document Type and Number:
Japanese Patent JP4477623
Kind Code:
B2
Abstract:
A pulse width modulator (10) for converting a digital signal into a PWM signal, comprising a plurality of integrators (11) with integrator gains (12) arranged in series, a comparator (17) for comparing the output of the last integrator (11') with a reference, and thereby creating the PWM signal. The modulator further has means (13) for realizing self-oscillation at a desired switching frequency, and a feedback path (14) connected to a point down stream said comparator and leading to a plurality of summing points, each preceding one of said integrators, wherein the PWM signal is quantized in time by the clock frequency of the modulator, and wherein the integrator gains (12) are adapted to reduce any quantization noise.
Inventors:
Nielsen Ole Nice
Application Number:
JP2006506372A
Publication Date:
June 09, 2010
Filing Date:
March 23, 2004
Export Citation:
Assignee:
Bang and Olufsen Ice Power Actiesel Scab
International Classes:
H03M5/08; H03M3/02; H03M7/32
Domestic Patent References:
| JP9307447A | ||||
| JP2000507759A |
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda
Fumiaki Otsuka
Takaki Nishijima
Hiroyuki Suda