公开(公告)号：US20200052654A1

公开(公告)日：2020-02-13

申请号：US16353632

申请日：2019-03-14

Applicant: QUALCOMM Incorporated

Inventor： Michael MCGOWAN ,  Iulian MIREA

IPC: H03F1/02 ,  H03F3/213

Abstract: A power amplifier (PA) circuit includes a circuit for generating a supply voltage at an upper voltage rail for a power amplifier (PA). The circuit includes a DC-to-DC converter for generating a voltage from which the supply voltage is generated; a linear amplifier for sourcing or sinking current to or from the upper voltage rail via a capacitor for performing fine adjustment of the supply voltage; a first switching device coupled between an output of the linear amplifier and a lower voltage rail to selectively assist the linear amplifier sink current through the capacitor to deal with actual or anticipated transient response of the supply voltage; and a second switching device coupled between the upper voltage rail and the lower voltage rail to selectively discharge the capacitor in response to actual or anticipated transient response of the supply voltage.

公开(公告)号：US20200052682A1

公开(公告)日：2020-02-13

申请号：US16251997

申请日：2019-01-18

Applicant: QUALCOMM Incorporated

Inventor： Michael MCGOWAN ,  Iulian MIREA

IPC: H03K5/24 ,  G01R19/165

Abstract: A current comparator including a first comparator configured to generate a first output signal based on a comparison of a first current to at least a second current; a second comparator configured to generate a second output signal based on a comparison of the first current to at least a third current; and a circuit configured to: direct the first current to the first comparator to perform the comparison of the first current to the at least the second current while blocking the first current from being applied to the second comparator; or direct the first current to the second comparator to perform the comparison of the first current to the at least the third current while blocking the first current from being applied to the first comparator.