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公开(公告)号：US20240055991A1
公开(公告)日：2024-02-15
申请号：US18446332
申请日：2023-08-08
Applicant: QUALCOMM Incorporated
Inventor： Sunghyun PARK , Pavan Kumar RAMAKRISHNA , Roger BROCKENBROUGH
Abstract: Techniques and apparatus for transitioning between various operating modes for a switched-mode power supply (SMPS) in a wireless local area network (WLAN) device powered by a coin cell battery in an effort to maintain performance and functionality of the WLAN device and efficiency of the SMPS. One example apparatus is an integrated circuit (IC) for power management. The IC generally includes: a first port for coupling to a battery and a first terminal of a capacitive element; a second port for coupling to a second terminal of the capacitive element; a SMPS having an input coupled to the first port; and a switch coupled between the second port and a reference potential node for the IC.
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公开(公告)号：US20190028061A1
公开(公告)日：2019-01-24
申请号：US15909840
申请日：2018-03-01
Applicant: QUALCOMM Incorporated
Inventor： Yu-Ching YEH , Sean Joel LYN , Cheng-Han WANG , Roger BROCKENBROUGH
CPC classification number: H03F1/0266 , H03F3/193 , H03F3/195 , H03F3/245 , H03F2200/18 , H03F2200/451
Abstract: An amplifier may include a first transistor. The amplifier may also include a second transistor coupled to the first transistor in an output stage of the amplifier. The amplifier may also include a level shift resistor coupled between a gate of the first transistor and a gate of the second transistor. The amplifier may further include a feedback bias circuit coupled to the gate of the first transistor and the gate of the second transistor through the level shift resistor. The feedback bias circuit may be configured to sense a common mode voltage of the output stage of the amplifier, and to compare the common mode voltage with a reference voltage to control a resistor bias current conducted by the level shift resistor.
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