Modulators – Pulse or interrupted continuous wave modulator – Pulse width modulator
Reexamination Certificate
2007-01-30
2007-01-30
Chang, Joseph (Department: 2817)
Modulators
Pulse or interrupted continuous wave modulator
Pulse width modulator
C375S238000
Reexamination Certificate
active
10763533
ABSTRACT:
The present invention provides a device for digital pulse width modulation with: (a) a filter device (11) for filtering a filter input signal (10″); (b) a quantization device (13) for quantizing a filter output signal (11′) of the filter device (11); (c) a PWM mapper device (15) for generating a digital PWM signal (15′) from an output signal (13′) of the quantization device (13); and (d) a feedback loop (17) for feeding back the digital PWM signal (15′) to a loop input signal (10′) and for generating the filter input signal (10″) by subtraction. The present invention likewise provides a method for digital PWM.
REFERENCES:
patent: 5559467 (1996-09-01), Smedley
patent: 5777512 (1998-07-01), Tripathi et al.
patent: 6107876 (2000-08-01), O'Brien
patent: 6373334 (2002-04-01), Melanson
patent: 6373417 (2002-04-01), Melanson
patent: 6812876 (2004-11-01), Miller
patent: 2003/0031245 (2003-02-01), O'Brien
patent: 2004/0131193 (2004-07-01), Kitamura
patent: 19619208 (1997-11-01), None
patent: 10027164 (2001-06-01), None
patent: 2 290 091 (1975-10-01), None
Gourgue, F. et al., “A Bandpass Subsampled Delta-Sigma Modulator for Narrowband Cellular Mobile Communications,”Circuits and Systems,1994 ISCAS, Internat. Symposium, London, pp. 353-356.
Magrath A. J. et al., “Hybrid Pulse Width Modulation/Sigma-Delta Modulation Power Digital-to-Analogue Converter,”IEE Proc-Circuits Devices Systems,vol. 143, No. 3, Jun. 1996, pp. 149-156.
Magrath et al., “Performance Enhancement of Sigma-Delta Modulator D-A Converters Using Non-Linear Techniques,”IEE Internat. Symp. Circuits and Systems,ISCAS 1996, pp. 227-280.
Magrath A. J. et al., “Design and Implementation of a FPGA Sigma-Delta Power DAC,”Signal Processing Systems,1997, pp. 511-521.
International Search Report dated Jun. 1, 2004.
Chang Joseph
Infineon - Technologies AG
Jenkins Wilson Taylor & Hunt, P.A.
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