Dialog Semiconductor (UK) Limited

Carlos Azevedo

Ambreesh Bhattad

Frank Kronmueller

Mahir Uka

Benedikt Wolf

A linear regulator which has a pass device coupled between an input voltage level and an output node, a voltage divider circuit for generating a feedback voltage that depends on an output voltage at the output node, and an operational amplifier for controlling the pass device, the operational amplifier receiving the feedback voltage and a reference voltage at its inputs is presented. The operational amplifier has: an input stage that receives the feedback voltage and the reference voltage at its inputs, an amplifier stage that receives an output of the input stage at its input, and a current injection circuit for sourcing current into an intermediate node between the input stage and the amplifier stage, or sinking a current from the intermediate node. The disclosure further relates to a corresponding method of operating a linear regulator.

Programmable two-way fast DVC control circuit

A linear regulator with indirect leakage compensation is presented. The regulator has a pass device coupled between an input voltage and an output node, a feedback loop for controlling the pass device based on a reference voltage and a feedback voltage that depends on an output voltage, an off-state device that is kept in the off-state, and a leakage compensation circuit for sinking a leakage compensation current from the output node, in dependence on a leakage current of the off-state device. The off-state device is coupled between the leakage compensation circuit and an intermediate voltage level of the linear regulator. The intermediate voltage level is a voltage level between the input voltage level and ground, with a magnitude of the intermediate voltage level being smaller than a magnitude of the input voltage level. A corresponding method of operating a linear regulator with leakage compensation is presented.

Growing community of inventors

Swindon, United Kingdom

Carlos Azevedo