Transformer with high common-mode rejection ratio (CMRR)

    公开(公告)号:US10511278B2

    公开(公告)日:2019-12-17

    申请号:US15959824

    申请日:2018-04-23

    Abstract: Certain aspects of the present disclosure are generally directed to a structure for a balanced-unbalanced (balun) transformer. For example, certain aspects of the present disclosure provide a transformer that generally includes a first winding having a first terminal coupled to an input node and a second terminal coupled to a reference potential node. The transformer may also include a first impedance coupled between a center tap of the first winding and the reference potential node, and a second winding magnetically coupled to the first winding and having a first terminal coupled to a first differential node of a differential output pair, a second terminal coupled to a second differential node of the differential output pair, and a center tap coupled to the reference potential node.

    On-chip coupling capacitor with patterned radio frequency shielding structure for lower loss

    公开(公告)号:US10236573B2

    公开(公告)日:2019-03-19

    申请号:US15687065

    申请日:2017-08-25

    Abstract: A capacitor radio frequency (RF) shielding structure may include a ground plane partially surrounding a coupling capacitor in an RF signal path. The ground plane may include a first ground plane portion extending between a positive terminal of the RF signal path and a negative terminal of the RF signal path. The ground plane may include a second ground plane portion extending between the positive terminal and the negative terminal of the RF signal path. The second ground plane portion may be opposed the first ground plane portion. The capacitor RF shielding structure may also include a patterned shielding layer electrically contacting the first ground plane portion and/or the second ground plane portion. The patterned shielding layer may electrically disconnecting a return current path over the patterned shielding layer to confine a return current to flowing over the first ground plane portion or the second ground plane portion.

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