Common-mode impedance network for reducing sensitivity in oscillators
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United States of America Patent
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Nov 7, 2017
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Jun 22, 2017
app pub date -
Dec 16, 2015
filing date -
Dec 16, 2015
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Abstract
A low-complexity differential inductor and common-mode impedance network for reducing effects of flicker noise in an oscillator output signal have been disclosed. An oscillator includes a planar conductive loop comprising a first terminal, a second terminal, and a center tap. The planar conductive loop is formed from a first conductive layer above an integrated circuit substrate. The center tap is coupled to a first power supply node. The oscillator includes a planar conductive structure extending from a first point proximate to the center tap. The planar conductive structure extends along a line of symmetry of the planar conductive loop to a second point proximate to the first terminal and the second terminal. The planar conductive structure may be formed from the first conductive layer and may be directly coupled to the center tap.
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