Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2007-05-08
2009-12-15
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S118000, C341S120000, C341S155000
Reexamination Certificate
active
07633418
ABSTRACT:
A sigma-delta modulator and an output rate reduction method are disclosed. The sigma-delta modulator comprises an integrator, an analog-to-digital converter, and a controller. An input signal is received by the integrator to generate an integrated signal. The integrated signal is then converted by the analog-to-digital converter into a digital modulation signal. The input signal is received by the controller to calculate an input signal power. The analog-to-digital converter can be controlled by the controller based on a predetermined power value and a sum of the input signal power and a total quantization error power. By the way mentioned above, the out rate of the sigma-delta modulator is reduced.
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Hsu Winston
Nguyen Linh V
Realtek Semiconductor Corp.
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