Dialog Semiconductor (uk) Limited

Junyue Sun

Zhenyu Song

Nailong Wang

Xiaogang Zhao

Huibin Cao

Yufeng Zou

Ze Han

Lijie Chen

Libo Zhou

A negative feedback circuit, comprising a node, and a control circuit coupled to the node, wherein the control circuit is configured to provide a stabilizing signal in response to a noise signal coupling to the node from a power rail, and the stabilizing signal is configured to reduce the noise signal at the node and the power rail.

Circuit for reducing a noise signal

A method and apparatus for operating a semiconductor light source is presented. In particular there is a current regulator for regulating a current flowing through a light emitting diode device. The current regulator includes a first switch for receiving a first current flowing through the semiconductor light source and a control circuit coupled to the first switch and adapted to provide a second current proportional to the first current. The current regulator is adapted to regulate the first current using the second current.

Method and apparatus for operating a semiconductor light source

A method and an apparatus for charge recycling. The method is comprised of the steps of receiving a charge at an energy storage element from a parasitic component, storing the charge at the energy storage element, and providing the charge stored at the energy storage element to a power supply's input or output. The step of receiving the charge at the energy storage element includes operating a discharging switch to selectively couple the parasitic component with the energy storage element and receiving the charge at the energy storage element via the discharging switch when the energy storage element and the parasitic component are coupled.

Method and apparatus for charge recycling

A dimmer for dimming light emitted by a light source is presented. The dimmer includes a regulation switch for regulating a current flowing through the light source and a regulator circuit that provides an electronic parameter to control the regulation switch. The regulator circuit has a dimmer switch for passing or blocking the electronic parameter, and a signal generator generating a plurality of modulated signals configured to operate the regulator circuit in a first phase and in a second phase. In the first phase the regulation circuit maintains the electronic parameter to a target value. In the second phase the regulation circuit monitors a variation of the electronic parameter and maintains the electronic parameter to a predetermined value.

Growing community of inventors

Tianjin, China

Junyue Sun