US Patent 7671672 Baseband noise reduction
Patent 7671672 was granted and assigned to SiRF on March, 2010 by the United States Patent and Trademark Office.
All edits
An active circuit includes (a) a first chopper circuit that receives an input signal and a chopping signal of a frequency higher than a base band of the input signal, and that provides a modulated input signal; (b) an amplifier that receives the modulated input signal and that provides an amplified signal resulting from amplifying the modulated input signal; and (c) a second chopper circuit that receives the amplified signal and the chopping signal to provide an output signal. The chopping signal has a frequency that may be dynamically adjusted to accommodate changes in impedance and signal spectrum as a result of the operations of the chopper circuits. The active circuit further includes a low pass filter that receives the output signal and that attenuates components of the output signal above the base band of the input signal. In this manner 1/f noise introduced by the amplifier is eliminated or reduced.
US Patent 07671672 Baseband noise reduction US Patent 7671672 Baseband noise reduction
US Patent 07671672 Baseband noise reduction
Find more entities like US Patent 7671672 Baseband noise reduction
