Cirrus Logic Inc.

Philips International, B.v.

Standard Microsystems Corporation

Other

Philips Lighting Holding B.v.

Wesley Ladd Mokry

Michael Allan Kost

Eric Jerome King

David J Knapp

Edmund Mark Schneider

Tony Susanto

John L Melanson

Christian Larsen

Prashanth Drakshapalli

Stephen Timothy Hodapp

Firas Azrai

Rex T Baird

David M Pietruszynski

Kathryn Rose Holland

Yanning Lu

Neel Pramanik

A system may include an integrated circuit comprising an on-chip power supply and an internal power rail, a gate-controlled supply switch configured to be coupled between the on-chip power supply and an external power supply such that the internal power rail is regulated by the on-chip power supply when the gate-controlled supply switch is open and the internal power rail is regulated by the external power supply when the gate-controlled supply switch is closed, and a control circuit configured to monitor conditions associated with the on-chip power supply when the gate-controlled supply switch is transitioning between switch states and based on the conditions, control a rate of charging or discharging of a capacitance coupled to a gate of the gate-controlled supply switch.

Managing on-chip power rail between internal power supply and external power supply

In accordance with embodiments of the present disclosure, a system and method for providing compatibility between a load having a reactive impedance during steady-state operation and a secondary winding of an electronic transformer driven by a leading-edge dimmer may include a first circuit and a second circuit. The first circuit may cause the load to have a substantially non-reactive impedance when the first circuit is enabled. The second circuit may enable the first circuit to cause the load to have the substantially non-reactive impedance during a duration of time following start-up of the electronic transformer and disable the first circuit after the duration such that the load has the reactive impedance during steady-state operation of the load.

Systems and methods for low-power lamp compatibility with an electronic transformer

In accordance with systems and methods of the present disclosure, an apparatus for providing compatibility between a load having a reactive impedance and a secondary winding of an electronic transformer may include a power converter and a circuit. The power converter may be configured to transfer electrical energy from the secondary winding to the load. The circuit may be configured to charge an energy storage device coupled to the power converter following start-up of the electronic transformer in order to increase a voltage of the energy storage device to at least a voltage level sufficient for the electronic transformer to enter steady-state operation.

A single magnetic storage element is used to provide power to multiple lighting devices, which may be strings of light-emitting diodes (LEDs) of different color. A switching circuit controls alternating application of energy among the multiple lighting devices and another switching circuit may charge the primary winding to different energy levels to control the intensity of the multiple lighting devices. In particular, the multiple lighting devices may be controlled to provide a desired color profile while dimming the lighting devices, while requiring only a single magnetic storage element for supplying energy to the lighting devices.

Secondary-side alternating energy transfer control with inverted reference and LED-derived power supply

A communication network is provided for interconnecting a network of digital systems, such as multimedia devices. Each node of the communication network may include a receiver and a transmitter. The receiver and transmitter of each node can be an optical receiver and transmitter. The optical receiver is preferably powered by two power supply pins, each providing different supply amounts. An activity detector within the receiver can be powered from a first supply amount, and the signal path of the optical receiver can be supplied from a second supply amount greater than the first supply amount. The first supply amount is provided at all times, and the second supply amount is only provided if activity is detected. A voltage regulator which provides the first supply amount can be beneficially embodied on the same integrated circuit as a network interface to reduce the manufacturing cost of the network. By powering the activity detector separate from the signal path, power down and power up (normal) operating states are envisioned for reducing power consumption and increasing longevity of the optical receiver and transmitter.

Transmission network having an optical receiver that utilizes dual power pins and a single status pin to lower power consumption, lower manufacturing cost, and increase transmission efficiency

Servo control circuitry includes a digital to analog converter for converting digital servo control data into a pulse width modulated signal. A first conductor transmits the pulse width modulated signal to an external device . A second conductor transmits a reference signal derived from the clock signal to external device , external device differentially receiving the pulse width modulated signal with respect to the reference signal.

Optical servo control circuits and methods using pulse width modulation and offset control for driving an electromechanical motor

An interface for interfacing an optical pickup is associated with processing circuitry . A plurality of inputs receive data retrieved from an optical disk by the pickup and are each coupled to a corresponding one of the inputs and independently activated and deactivated to selectively pass the data to the processing circuitry.

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Austin, TX, United States of America

Wesley Ladd Mokry