Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Lars Risbo0
Rahmi Hezar0
Date of Patent
March 8, 2011
Patent Application Number
12546521
Date Filed
August 24, 2009
Patent Primary Examiner
Patent abstract
An embodiment of the invention provides one or more cascade circuits that are cascaded together to form a cascaded circuit. The cascaded circuit reduces noise at an analog output of the cascaded circuit. Each of the cascade circuits contains a noise-shaping circuit, a PCM (Pulse Code Modulation)-to-PWM (Pulse Width Modulation) converter and a 1-bit P-tap AFIR (Analog Finite Impulse Response) filter DAC. Noise at the output of the cascaded circuit may be further reduced by increasing the number of cascade circuits.
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