Programmable two-way fast DVC control circuit

US11625055B2 · kind B2 · utility

Assignee

• Dialog Semiconductor (UK) Limited · GB

Inventors

• Carlos Azevedo · Swindon, GB
• Ambreesh Bhattad · Swindon, GB
• Frank Kronmueller · Neudenau, DE
• Mahir Uka · Ulm, DE
• Benedikt Wolf · Nabern, DE

Key dates

• Filing date: Apr 3, 2019
• Grant date: Apr 11, 2023
• Expiry date: Jul 27, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F1/575
• WIPO field: Control
• WIPO sector: Instruments

Abstract

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.