DC offset correction for direct-conversion receiver
First Claim
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1. A DC offset correction system for a direct-conversion receiver that includes a baseband section that has an input and an output, the DC offset correction system comprising:
- a DC feedback correction servo-loop in signal communication with the baseband section, wherein the DC feedback correction servo-loop is coupled to both the input and output of the baseband section; and
an attenuator within the DC feedback correction servo-loop capable of generating an attenuation coefficient kfb.
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Abstract
A DC offset correction system for a direct-conversion receiver is disclosed that may include a DC feedback correction servo-loop in signal communication with a baseband section, where the DC feedback correction servo-loop is coupled to both the input and output of the baseband section and an attenuator within the DC feedback correction servo-loop.
33 Citations
28 Claims
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1. A DC offset correction system for a direct-conversion receiver that includes a baseband section that has an input and an output, the DC offset correction system comprising:
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a DC feedback correction servo-loop in signal communication with the baseband section, wherein the DC feedback correction servo-loop is coupled to both the input and output of the baseband section; and an attenuator within the DC feedback correction servo-loop capable of generating an attenuation coefficient kfb. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A DC offset correction system for a direct-conversion receiver that includes a baseband section that has an input and an output, the DC offset correction system comprising:
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a DC feedback correction servo-loop in signal communication with the baseband section, wherein the DC feedback correction servo-loop is coupled to both the input and output of the baseband section; and means for producing an attenuation coefficient kfb within the DC feedback correction servo-loop, the attenuation means in signal communication with the input of the baseband section. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A method for correcting for DC offset in a direct-conversion receiver that includes a baseband section that has an input and an output utilizing a DC offset correction system, the method comprising:
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processing a received baseband output signal from the output of the baseband section to create a processed feedback signal; attenuating the processed feedback signal with an attenuation coefficient kfb to create an attenuated feedback signal; transmitting the attenuated feedback signal to the input of the baseband section. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification