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公开(公告)号：US20200007098A1
公开(公告)日：2020-01-02
申请号：US16115448
申请日：2018-08-28
Applicant: Qualcomm Incorporated
Inventor： Hung-Min Cheng , Ara Bicakci , Haitao Gan , Shen Wang , Mounir Bohsali , Hedieh Elyasi , Beomsup Kim
Abstract: An apparatus is disclosed for dual-mode amplification by varying a load impedance. In an example aspect, the apparatus includes a low-noise amplifier, a first component, a second component, and a switch. The first component has a first input impedance. The second component is coupled between the low-noise amplifier and the first component. The second component has a second input impedance that is greater than the first input impedance. The switch is coupled in parallel with the second component between the low-noise amplifier and the first component. The switch is configured to selectively be in an open state to engage the second component or a closed state to bypass the second component.
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公开(公告)号：US10444780B1
公开(公告)日：2019-10-15
申请号：US16136305
申请日：2018-09-20
Applicant: QUALCOMM Incorporated
Inventor： Yueh Chun Cheng , Hung-Min Cheng , Chien-Chih Lin
Abstract: Regulation/Bypass automation for a low drop-out regulator (LDO) with multiple supply voltages is disclosed. In some implementations, a LDO includes a resistor, a pass transistor having a source, a gate, and a drain to output a voltage Vout, the source coupled to a supply voltage, the gate coupled to an output of an operational transconductance amplifier (OTA), and the drain coupled to a first terminal of the resistor; a feedback switch having a drain, a gate, and a source, the drain coupled to a second terminal of the resistor, the source coupled to a negative input of the OTA; and an pull-down transistor having a drain, a gate, and a source, the source coupled to ground, and the drain coupled to the negative input of the OTA, wherein the gate of the pull-down transistor and the gate of the feedback switch are configured to receive a bypass signal.
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