Apparatus and method for improving the feedback linearity of...

Details Apparatus and method for improving the feedback linearity of... Apparatus and method for improving the feedback linearity of...

2011-03-22

2011-03-22

Choe, Henry K (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S251000

Reexamination Certificate

active

07911268

ABSTRACT:
A conversion circuit is provided for a 1.5-bit Σ-Δ class-D amplifier to improve the feedback linearity of the class-D amplifier, by periodically inverting and mixing a first positive feedback signal and a first negative feedback signal from the power stage of the class-D amplifier to generate a second positive feedback signal and a second negative feedback signal with better linearity for feedback control in the class-D amplifier.

REFERENCES:
patent: 5815037 (1998-09-01), Tomasini et al.
patent: 6750703 (2004-06-01), Shen et al.
patent: 6914479 (2005-07-01), Gabillard et al.
patent: 7479826 (2009-01-01), Yoshizawa et al.

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