Audio player using sigma-delta pulse-width modulation
AssigneeSunplus Technology Co., Ltd.
InventorHan-Huah Hsu
Life of this patent
Estimating the term…
Abstract
An audio player using sigma-delta pulse-width modulation includes a Δ-Σ PWM unit, a drive unit, a speaker unit, and an error prediction unit. The Δ-Σ PWM unit receives an input signal and generates a pulse-width modulation (PWM) signal by means of sigma-delta pulse-width modulation. The drive unit receives the PWM signal and generates a drive signal, and the speaker unit receives the drive signal to produce sound. The error prediction unit receives the PWM signal and generates a predicted feedback signal for the Δ-Σ PWM unit according to stored error data.
Claims7
An audio player using sigma-delta pulse-width modulation (Δ-Σ PWM), comprising:
- a Δ-Σ PWM unit for receiving an input signal and generating a pulse-width modulation (PWM) signal by means of sigma-delta pulse-width modulation;
- a drive unit for receiving the PWM signal and generating a drive signal;
- a speaker unit for receiving the drive signal to produce sound;
- and
- an error prediction unit for receiving the PWM signal and generating a predicted feedback signal according to stored error data;
- wherein the Δ-Σ PWM unit receives the predicted feedback signal as a feedback signal.
Dependencies are inferred from the claim text.