The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 2010
Filed:
Dec. 05, 2006
Minsheng Wang, Irvine, CA (US);
Minsheng Wang, Irvine, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
Methods and systems for modulating an input electrical signal are disclosed and may comprise modulating input signals utilizing a digital Class-D modulator and generating a digital output signal that is proportional to the input signals. The digital Class-D modulator may be comprised of four stages. To avoid integrator saturation, the output of at least one integrator stage may be limited by utilizing limiters in integrator feedback loops. The digital Class-D modulator utilizes a pulse width modulation technique. For increased signal to noise ratio (SNR) at a desired output power, the magnitude of a triangular waveform oscillator voltage may be greater than the magnitude of an integrated input signal. The digital output signal may be fed back to an input of at least one of the four stages in the digital Class-D modulator. The triangular waveform oscillator frequency may be adjusted to match desired output frequency.