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Linear Technology Corporation patents


Recent patent applications related to Linear Technology Corporation. Linear Technology Corporation is listed as an Agent/Assignee. Note: Linear Technology Corporation may have other listings under different names/spellings. We're not affiliated with Linear Technology Corporation, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "L" | Linear Technology Corporation-related inventors


Monitoring of channel stability and interference in wireless networks

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. ... Linear Technology Corporation

Detection and classification scheme for power over ethernet system

In a method performed by a poe system, a pse provides data and operating voltage over ethernet wires to a pd. Before the full poe voltage is supplied, the pse generates a low current signal received by the pd. ... Linear Technology Corporation

Active differential resistors with reduced noise

A method and system of providing an active differential resistor. The active differential resistor includes a diode having a first node and a second node. ... Linear Technology Corporation

Low power timing, configuring, and scheduling

A network device includes a network interface circuit, a microprocessor, a timing circuit, and a microsequencer. The timing circuit is configured to, based on a primary timing signal, generate a time signature and switch the network device from an inactive state to an active state when the time signature satisfies a predetermined threshold length of time for packet transmission. ... Linear Technology Corporation

Multiple temperature testing of non-volatile memory data retention time

The data retention time of a non-volatile memory array containing multiple non-volatile memory cells, each cell having a floating gate, may be tested. The method may include: baking the non-volatile memory array at a first temperature for a first duration and at a second temperature that is materially different than the first temperature for a second duration; testing the non-volatile memory array before and after each baking; and deciding whether to use or sell the tested non-volatile memory array based on results of the testing before and after each baking.. ... Linear Technology Corporation

Communications system using hybrid common mode choke and kelvin sensing of voltage

In a communications system that conducts differential data via a pair of wires, ac common mode noise is undesirably coupled to the wires in a noisy environment. A hybrid common mode choke (hcmc) attenuates the ac common mode noise while passing the differential data to a phy. ... Linear Technology Corporation

Communications system using hybrid common mode choke and kelvin sensing of voltage

In a communications system that conducts differential data via a pair of wires, ac common mode noise is undesirably coupled to the wires in a noisy environment. A hybrid common mode choke (hcmc) attenuates the ac common mode noise while passing the differential data to a phy. ... Linear Technology Corporation

Balancing techniques and circuits for charge pumps

Methods and systems of pre-balancing a switched capacitor converter are provided. A first comparator includes a positive input configured to receive a voltage across an output capacitor and a negative input configured to receive a first hysteresis voltage. ... Linear Technology Corporation

Driving charge pump circuits

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. ... Linear Technology Corporation

Balancing charge pump circuits

Methods and systems of controlling a switched capacitor converter are provided. Upon determining that a voltage across a flying capacitor is above a first threshold, a first current is drawn from a first terminal of the flying capacitor by a first current source, and a second current is provided to a second terminal of the flying capacitor by a second current source. ... Linear Technology Corporation

Transformer-based hybrid power converters

A hybrid power converter circuit includes a switched-capacitor power converter stage and a pulse-width modulation (pwm) or resonant output circuit coupled to a switching node of the switched-capacitor power converter stage. In particular, the pwm or resonant output circuit can include a transformer having a primary winding and a secondary winding magnetically coupled to each other, and the secondary winding is coupled to the output node of the power converter. ... Linear Technology Corporation

Exposed solderable heat spreader for flipchip packages

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.. ... Linear Technology Corporation

Maintain power signature controller at power interface of poe or podl system

The invention pertains to systems where dc power is supplied by a pse to a pd, such as over differential data wire pairs. Ieee standards require a minimum current to be drawn from the pd in order for the pse to continue supplying the dc voltage. ... Linear Technology Corporation

Inverting amplifier receiving negative feedback voltage in voltage regulator

In the example of a voltage regulator outputting a negative voltage, its feedback voltage will also be negative. The feedback voltage is typically created using a resistor divider. ... Linear Technology Corporation

11/09/17 / #20170324331

Dcr inductor current-sensing in four-switch buck-boost converters

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. ... Linear Technology Corporation

10/26/17 / #20170310491

Power over data lines system with redundant power connections

. . In one embodiment, a master device has a first port and a second port and initially applies a dc voltage only to the first port. A plurality of slave devices, each have a third port and a fourth port, are serially connected to the master device in a ring, via conductors, starting at the first port and ending at the second port. ... Linear Technology Corporation

10/26/17 / #20170310306

Switchable termination with multiple impedance selections

Multiple termination impedance values are provided in a switchable termination circuit so as to accommodate multiple transmission line characteristics. In one example, a termination matching circuit includes first and second nodes, a series interconnection of a first switch and a first impedance coupled between the first and second nodes, and another series interconnection of a second switch and a second impedance coupled between the first and second nodes. ... Linear Technology Corporation

10/26/17 / #20170310127

Energy storage device stack balancing using switched inductor background

An energy storage stack balancing circuit may balance a set of serially connected energy storage devices. An electronic switching system may control the delivery of energy into and out of the inductor. ... Linear Technology Corporation

09/28/17 / #20170279349

High efficiency charge pump with auxiliary input operative to optimize conversion ratio

Switched capacitor circuit architectures that may enable high efficiency step-up or step-down dc-dc conversion from a primary, fixed supply input voltage using a four-switch switched capacitor topology and a separate auxiliary supply input voltage. The auxiliary supply input voltage can be optimized within the system or chosen from among other readily available supplies in the system to achieve the highest efficiency conversion ratio, without modifying the switch and flying capacitor arrangement. ... Linear Technology Corporation

08/17/17 / #20170237575

Power over data lines system using voltage clamp in pd for detection or classification

A podl system includes a pse connected via a wire pair to a pd, where differential data and dc power are transmitted over the same wire pair. Typically, low voltage/current detection and classification routines are required upon every powering up of the system to allow the pd to convey its podl requirements to the pse. ... Linear Technology Corporation

08/17/17 / #20170237574

Power over data lines system providing a variable voltage to powered device

A podl system includes a pse connected via a wire pair to a pd, where differential data and dc power are transmitted over the same wire pair. Typically, low voltage/current detection and classification routines are required upon every powering up of the system to allow the pd to convey its podl requirements to the pse. ... Linear Technology Corporation

08/17/17 / #20170237345

Current mode switching regulator and operating method with offset circuitry to emulate a transient load step response

A current mode switching regulator circuit and operating method includes a variable duty cycle power switch controller, a voltage feedback loop that provides a feedback signal based on the output voltage, a current feedback loop that provides a current sense signal based on the output current, and an offset circuit having an external signal input and coupled to the current feedback loop. The power switch controller controls the switching regulator circuit to generate an output voltage and an output current. ... Linear Technology Corporation

07/20/17 / #20170207723

Fast transient supply with a separated high frequency and low frequency path signals

A power interface device includes a main switching converter and an auxiliary switching converter. The main switching converter is coupled to an input terminal and an output terminal and configured to operate at a first switching frequency to source a low frequency current from the input terminal to the output terminal. ... Linear Technology Corporation

07/20/17 / #20170207721

Control architecture with improved transient response

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. ... Linear Technology Corporation

07/06/17 / #20170194863

Control architecture with improved transient response

A power supply system includes a power source; a load device configured to receive power from the power source; and a power interface device coupled to the power source and the load device and configured to change a first voltage provided by the power source to a second voltage for operating the load device. The power interface device include a main switching converter configured to operate at a first switching frequency and source low frequency current to the load device and an auxiliary switching converter coupled in parallel with the main switching converter and configured to operate at a second and different switching frequency and source fast transient high frequency current to the load device.. ... Linear Technology Corporation

05/18/17 / #20170141773

Active differential resistors with reduced noise

. . A method and system of providing an active differential resistor. The active differential resistor includes a diode having a first node and a second node. ... Linear Technology Corporation

05/18/17 / #20170141730

Double-balanced field-effect transistor mixer with direct single-ended intermediate frequency outputs

A double-balanced fet mixer may include: single-ended rf port that receives or delivers single-ended rf signal; rf balun that converts the received single-ended rf signal into differential rf signal or generates delivered single-ended rf signal from received differential rf signal; local oscillator input port receives local oscillator signal; direct if port receives or delivers an if signal; and at least two fets process the local oscillator signal and generate or process the differential rf signal and if signal. The mixer may have no if balun separate and distinct from trf balun; may receive an input signal at rf port and generates output signal at if port. ... Linear Technology Corporation

05/11/17 / #20170134031

System and method for synchronization among multiple pll-based clock signals

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. ... Linear Technology Corporation

04/13/17 / #20170102272

Circuit and arrangement for 3-wire measurements with input protection

A method and a circuit take a measurement of a sensor having first, second and third lead wires by: (a) providing first, second and third terminals for voltage measurements; (b) connecting a current sensing device (e.g., a reference resistor) to provide a signal at the third terminal that is indicative of the current in the third lead wire of the sensor; (c) connecting a first protective device between the first lead wire of the sensor and the first terminal; (d) connecting a second protective device between the second lead wire of the sensor and the second terminal; (e) connecting a first current source to the first lead wire of the sensor; (f) connecting a second current source to the second lead wire of the sensor; and (g) measuring a first voltage across the first and second terminals and a second voltage across the third terminal and the voltage reference.. . ... Linear Technology Corporation

03/02/17 / #20170063076

Adaptive in-rush current control for minimizing mosfet peak temperature upon voltage step

In one embodiment, a pass mosfet is coupled in series between an input voltage and a load, and a bypass capacitor is connected in parallel with the load. In response to a voltage step across the mosfet, the mosfet is adaptively controlled to conduct an in-rush current of 2icl=2il during the bypass capacitor 12 charging time, where icl is the capacitive current and il is the load current. ... Linear Technology Corporation

02/23/17 / #20170055236

Multiple access point wireless mesh network

A mesh network system includes a plurality of network nodes, a network manager, and at least one access point. The network nodes communicate wirelessly with each other and the at least one access point of the mesh network system. ... Linear Technology Corporation








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