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公开(公告)号：US11271574B1
公开(公告)日：2022-03-08
申请号：US17197827
申请日：2021-03-10
Applicant: QUALCOMM INCORPORATED
Inventor： Tomas O'Sullivan , Lai Kan Leung , Dongling Pan , Jianjun Yu , Dongmin Park
Abstract: A frequency synthesizer system may include a first voltage-controlled oscillator (VCO) circuit, a second VCO circuit, and multiplexing circuitry. The multiplexing circuitry may be configured to select either the output of the first VCO circuit or the output of the second VCO circuit in response to a mode selection signal.
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Patent Agency Ranking
公开(公告)号：US11984900B2
公开(公告)日：2024-05-14
申请号：US17934654
申请日：2022-09-23
Applicant: QUALCOMM Incorporated
Inventor： Jianjun Yu , Yue Chao , Tomas O'Sullivan , Lai Kan Leung
IPC: H03L7/099 , H03B5/12 , H03K3/0231 , H03M1/46
CPC classification number: H03L7/099 , H03B5/1293 , H03K3/0231 , H03M1/46
Abstract: Methods and apparatus for storing a control voltage of a phased-locked loop (PLL) when switching from mission mode to standby mode for the PLL, and for restoring the control voltage of the PLL when switching back to mission mode. An example PLL circuit includes a charge pump, a voltage-controlled oscillator (VCO) having a control input coupled to an output of the charge pump via a node, and a tracking circuit coupled to the node. The tracking circuit is generally configured to sample a voltage of the node during a mission mode, save a representation of the sampled voltage before entering a standby mode, and restore the sampled voltage to the node for reentering the mission mode using the saved representation of the sampled voltage.
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公开(公告)号：US08890625B2
公开(公告)日：2014-11-18
申请号：US13733746
申请日：2013-01-03
Applicant: QUALCOMM Incorporated
Inventor： Richard Chang , Tomas O'Sullivan , Cristian Marcu , Brian Kaczynski
Abstract: A frequency synthesizer for a WLAN transceiver is disclosed that may be used to generate 5.4 GHz and 2.4 GHz signals. The frequency synthesizer may be configured to minimize VCO pulling by using VCO operating frequencies that are not integer multiples of the RF bands. Further, the frequency synthesizer may be configured to minimize interference with other frequency bands used by existing wireless systems.
Abstract translation: 公开了一种用于WLAN收发器的频率合成器，其可用于产生5.4GHz和2.4GHz信号。 频率合成器可以被配置为通过使用不是RF频带的整数倍的VCO工作频率来最小化VCO拉动。 此外，频率合成器可以被配置为最小化对现有无线系统使用的其它频带的干扰。
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公开(公告)号：US11632230B2
公开(公告)日：2023-04-18
申请号：US17340953
申请日：2021-06-07
Applicant: QUALCOMM Incorporated
Inventor： Alvin Siu-Chi Li , Tomas O'Sullivan , Jianjun Yu , Yiwu Tang
Abstract: An aspect relates to an apparatus including an input buffer including an input configured to receive an input voltage; a ramp voltage generator including an input coupled to an output of the input buffer; an evaluation circuit including an input coupled to an output of the ramp voltage generator, wherein the evaluation circuit includes a first resistor coupled in series with first field effect transistor (FET) between a first voltage rail and a second voltage rail; and an output buffer including an input coupled to a drain of the first FET and an output configured to generate an output voltage.
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公开(公告)号：US11387833B1
公开(公告)日：2022-07-12
申请号：US17466901
申请日：2021-09-03
Applicant: QUALCOMM Incorporated
Inventor： Alvin Siu-Chi Li , Yue Chao , Dongmin Park , Heui In Yoon , Tomas O'Sullivan , Jianjun Yu , Yiwu Tang
Abstract: A method of quantization noise cancellation in a phase-locked loop (PLL) is provided according to certain aspects. The PLL includes a phase detector having a first input configured to receive a reference signal and a second input configured to receive a feedback signal. The method includes delaying the reference signal by a first time delay, delaying the feedback signal by a second time delay, receiving a delta-sigma modulator (DSM) error signal, and adjusting the first time delay and the second time delay in opposite directions based on the DSM error signal.
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公开(公告)号：US20140184342A1
公开(公告)日：2014-07-03
申请号：US13733746
申请日：2013-01-03
Applicant: QUALCOMM INCORPORATED
Inventor： Richard Chang , Tomas O'Sullivan , Cristian Marcu , Brian Kaczynski
IPC: H03L7/06
Abstract: A frequency synthesizer for a WLAN transceiver is disclosed that may be used to generate 5.4 GHz and 2.4 GHz signals. The frequency synthesizer may be configured to minimize VCO pulling by using VCO operating frequencies that are not integer multiples of the RF bands. Further, the frequency synthesizer may be configured to minimize interference with other frequency bands used by existing wireless systems.
Abstract translation: 公开了一种用于WLAN收发器的频率合成器，其可用于产生5.4GHz和2.4GHz信号。 频率合成器可以被配置为通过使用不是RF频带的整数倍的VCO工作频率来最小化VCO拉动。 此外，频率合成器可以被配置为最小化对现有无线系统使用的其它频带的干扰。
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