Notch filter with differential split inductor
First Claim
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1. A method, comprising:
- coupling, via a differential inductor, a first terminal to a second terminal, the differential inductor comprising a first inductor section, a second inductor section separate from the first inductor section, and a common-mode point; and
tuning, via a variable capacitor, a resonant frequency associated with the differential inductor, wherein the variable capacitor is encircled by the differential inductor and serially directly connects the first inductor section to the second inductor section.
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Abstract
A notch filter including an inductor-capacitor tuning circuit is disclosed. The inductor-capacitor tuning circuit may determine a frequency response of the notch filter in accordance with an associated resonant frequency. In some exemplary embodiments, the inductor-capacitor circuit may include a differential inductor divided at a symmetry point and a variable capacitor coupled to the differential inductor at the symmetry point.
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Citations
18 Claims
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1. A method, comprising:
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coupling, via a differential inductor, a first terminal to a second terminal, the differential inductor comprising a first inductor section, a second inductor section separate from the first inductor section, and a common-mode point; and tuning, via a variable capacitor, a resonant frequency associated with the differential inductor, wherein the variable capacitor is encircled by the differential inductor and serially directly connects the first inductor section to the second inductor section. - View Dependent Claims (2)
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3. An apparatus comprising:
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a differential inductor comprising a first inductor section, a second inductor section separate from the first inductor section, and a common-mode point; and a variable capacitor encircled by the differential inductor, wherein the variable capacitor is configured to serially directly connect the first inductor section to the second inductor section and tune a resonant frequency associated with the differential inductor. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus comprising:
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means for coupling a first terminal to a second terminal via a differential inductor comprising a first inductor section, a second inductor section separate from the first inductor section, and a common-mode point; and means for tuning a resonant frequency associated with the differential inductor via a variable capacitor, the variable capacitor serially directly connecting the first inductor section to the second inductor section, wherein the means for tuning the resonant frequency is encircled by the means for coupling the first terminal to the second terminal. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification