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公开(公告)号：US10536861B2
公开(公告)日：2020-01-14
申请号：US13866751
申请日：2013-04-19
Applicant: LINEAR TECHNOLOGY CORPORATION
Abstract: The stability of a channel in a wireless network is evaluated at a node. Upon transmitting a packet from the node on a network channel, a first counter associated with the channel is incremented. Upon receiving an acknowledgment packet responsive to the transmitted packet, a second counter associated with the channel is incremented. A stability metric for the channel is computed based on values stored in the first and second counters. Additionally, interference on a channel of the network is measured at a node. Upon determining that no packet is received during a predetermined time-period on the channel, a received signal strength (RSS) is measured on the channel at an end of the predetermined time-period. Alternatively, upon determining that a packet is received during the predetermined time-period on the channel, the RSS is measured on the channel following completion of the transmission of the packet on the channel.
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公开(公告)号：US10447152B2
公开(公告)日：2019-10-15
申请号：US15465504
申请日：2017-03-21
Applicant: Linear Technology Corporation
Inventor： Xu Zhang , Jian Li , San Hwa Chee
Abstract: A method and system of driving a switched capacitor converter having a plurality of switches. A first driver coupled to a first switch is powered by providing a first reference voltage level VCC to a first supply and a GND reference to a second supply node of the first driver. A second driver coupled to a second switch is powered by providing a unidirectional path between the first supply node of a first driver and the first supply node of the second driver and by keeping OFF the second switch while turning ON the first switch. A third driver coupled to a third switch is powered by providing a unidirectional path between the first supply node of a second driver and the first supply node of the third driver and by keeping OFF the first and third switch while turning ON the second switch.
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公开(公告)号：US10084381B2
公开(公告)日：2018-09-25
申请号：US15654568
申请日：2017-07-19
Applicant: Linear Technology Corporation
Inventor： Xu Zhang , Jian Li , Zhouyuan Shi , Yi Ding Gu
CPC classification number: H02M3/1582 , H02M2001/0009
Abstract: An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.
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公开(公告)号：US10050559B2
公开(公告)日：2018-08-14
申请号：US15199693
申请日：2016-06-30
Applicant: LINEAR TECHNOLOGY CORPORATION
Inventor： Jian Li , Jindong Zhang
Abstract: A power interface device includes a main switching converter, an auxiliary switching converter, a feedback sense circuit, an error amplifier, a high pass filter, a transient detection circuit, and an auxiliary control circuit. The transient detection circuit is configured to receive the higher frequency component of the transient signal and output an enable signal when the higher frequency component of the transient signal falls outside of an operating window range defined by a first threshold and a second threshold and output a disable signal when the higher frequency component of the transient signal stays within the operating window range. The auxiliary control circuit configured to activate the auxiliary switching converter in accordance with the enable signal and to deactivate the auxiliary switching converter in accordance with the disable signal.
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公开(公告)号：US10033596B2
公开(公告)日：2018-07-24
申请号：US14682054
申请日：2015-04-08
Applicant: Linear Technology Corporation
Inventor： Alain Pierre Levesque , Lance Robert Doherty
Abstract: A wireless mesh network is provided with equipment and methods for monitoring and enforcement of license terms. The network includes a plurality of wireless network nodes, a wireless access point, and a network manager in communication with the access point and with the network nodes via the access point. At least one of the network nodes and the access point includes license information embedded in the device hardware, and the network manager provides services to the wireless network subject to license terms determined based on the license information embedded within the network node or access point. Additionally, the network manager is in communication with a user application external to the network, and relays communication between the user application and the wireless network. The network manager modulates communications relayed between the user application and the wireless network subject to the license information embedded within the network node or access point.
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Patent Agency Ranking
公开(公告)号：US10013003B2
公开(公告)日：2018-07-03
申请号：US13764045
申请日：2013-02-11
Applicant: Linear Technology Corporation
Inventor： Gregory Manlove , Yi Ding Gu , Jian Li
CPC classification number: G05F1/10 , G05F1/562 , H02M1/32 , H02M3/142 , H02M3/156 , H02M3/158 , H02M2001/0019 , H02M2001/0025
Abstract: A switching regulator circuit incorporates an offset circuit, connected in a control loop of the regulator circuit, that, in response to a signal indicating an imminent load current step, adjusts a duty cycle of a power switch for the current step prior to the regulator circuit responding to a change in output voltage due to the current step. In one embodiment, a load controller issues a digital signal shortly before a load current step. The digital signal is decoded and converted to an analog offset signal in a feedback control loop of the regulator to immediately adjust a duty cycle of the switch irrespective of the output voltage level. By proper timing of the offset, output voltage ripple is greatly reduced. The current offset may also be used to rapidly change the output voltage in response to an external signal requesting a voltage step.
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公开(公告)号：US20170345744A1
公开(公告)日：2017-11-30
申请号：US15167345
申请日：2016-05-27
Applicant: LINEAR TECHNOLOGY CORPORATION
Inventor： Edward William Olsen
IPC: H01L23/495 , H01L23/31 , H01L23/00
Abstract: A flipchip may include: a silicon die having a circuit side with solder bumps and a non-circuit side; a leadframe attached to the solder bumps on the circuit side of the silicon die; a heat spreader attached to the non-circuit side of the silicon die; and encapsulation material encapsulating the silicon die, a portion of the leadframe, and all but one exterior surface of the heat spreader. The leadframe may have NiPdAu plating on the portion that is not encapsulated by the encapsulation material and no plating on the portion that is attached to the solder bumps.
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公开(公告)号：US09825553B2
公开(公告)日：2017-11-21
申请号：US14531520
申请日：2014-11-03
Applicant: LINEAR TECHNOLOGY CORPORATION
Inventor： Jonathan Wayde Celani
CPC classification number: H02M7/217 , H02J5/005 , H02J17/00 , H02J50/12 , H02M2001/0058 , Y02B70/1441 , Y02B70/1491
Abstract: A control system is provided for controlling a power receiving circuit which is configured for receiving power wirelessly and producing an output voltage. The power receiving circuit has a resonant LC circuit including an inductive element and a capacitive element coupled in parallel. The control system includes a switching circuit coupled in parallel to the resonant LC circuit, and a feedback loop circuit configured for regulating the output voltage by controlling duration during which the switching circuit is in a conductive state in each cycle of a voltage developed across the resonant LC circuit.
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公开(公告)号：US20170324331A1
公开(公告)日：2017-11-09
申请号：US15654568
申请日：2017-07-19
Applicant: Linear Technology Corporation
Inventor： Xu Zhang , Jian Li , Zhouyuan Shi , Yi Ding Gu
CPC classification number: H02M3/1582 , H02M2001/0009
Abstract: An inductor current-sensing circuit for measuring a current in an inductor includes (a) a first RC network coupled between a first terminal of the inductor and a reference voltage source; and (b) a second RC network coupled between a second terminal of the inductor and the reference voltage source. The first RC network and the second RC network each have a time constant substantially equal to the ratio between the inductance and the DC resistance of the inductor. The inductor which current is being measured may be a primary inductor of a four-switch buck boost converter receiving an input voltage and providing an output voltage.
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公开(公告)号：US09811113B2
公开(公告)日：2017-11-07
申请号：US15208482
申请日：2016-07-12
Applicant: Linear Technology Corporation
Inventor： Richard William Ezell , Eric Wright Mumper
Abstract: A method synchronizes clock signals generated by a system that includes multiple PLLs that are connected in parallel and output frequency dividers driven by the PLLs. The system receives a common frequency reference signal and a common synchronization signal. Each PLL may have a reference signal frequency divider. The reference frequency divider may be phase-reset, for example, by a transition to a first logic state in the synchronization signal, and the output frequency dividers are each phase-reset, for example, by a transition to a second logic state following the transition to the first logic state in the synchronization signal. The transition to the first logic state may be, for example, a rising edge.
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