Dialog Semiconductor (uk) Limited

Dialog Semiconductor Gmbh

Apple Inc.

Silego Technology Inc.

Dialog Semiconductor B.v.

Ambreesh Bhattad

Frank Kronmueller

Hande Kurnaz

Horst Knoedgen

Gary Hague

Ludmil Nikolov

James T Doyle

Milan Dragojevic

Carlos Zamarreno Ramos

Stephan Drebinger

Nebojsa Jelaca

Christoph Nagl

Rupert Howes

Carlos Azevedo

Julian Tyrrell

Marinus Wilhelmus Kruiskamp

John Othniel McDonald

Pier Cavallini

Pietro Gallina

Nathan Willis John

Burak Dundar

Anthony Clowes

Frank Kronmuller

Liu Liu

Mahir Uka

Francesco Paolo

Christian Meindl

Alper Ucar

Benedikt Wolf

Frank Kronmüller

The present document relates to power converters. A power converter may be configured to convert an input voltage at an input of the power converter into an output voltage at an output of the power converter. The power converter may comprise a first switching circuit with a first inductor, a first high-side switching element, and a first low-side switching element. The power converter may comprise a second switching circuit with a second inductor, a second high-side switching element, and a second low-side switching element. The power converter may comprise a capacitive element having a first terminal coupled to the first high-side switching element and to the second high-side switching element and having a second terminal coupled to the first low-side switching element at a first node. The power converter may comprise a third switching element coupled between the first node and the output of the power converter.

Multi-mode two-phase buck converter

An apparatus for a first current sensor for a switching converter has an inductor and a first switch. The first switch is arranged to selectively couple the inductor to a first voltage. The first current sensor generates a first output current that is dependent on an inductor current flowing through the inductor The first current sensor compensates for an error arising due to the first switch in the generation of the first output current. The apparatus provides an improved current sensor for a switching converter that overcomes or mitigates the problem of errors in the measurement of a current.

Current sensor for a switching converter

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

The present document relates to differential amplifiers. A differential amplifier may comprise a current source, a first transistor, a second transistor, and a compensation circuit. A reference voltage may be applied to a first terminal of the first transistor, and a second terminal of the first transistor may be coupled to an output of the current source. A feedback voltage may be applied to a first terminal of the second transistor, and a second terminal of the second transistor may be coupled to the output of the current source. The compensation circuit may comprise a capacitive element coupled to the first terminal of the first transistor, and the compensation circuit may be configured to reduce a change of the reference voltage at the first terminal of the first transistor.

Differential amplifier

A solid-state circuit is presented which may comprise a pass device, a control circuit, and a leakage current compensation circuit. The pass device may have a first terminal, a second terminal and a drive terminal, wherein the first terminal of the pass device is coupled with an input terminal of the solid-state circuit, and wherein the second terminal of the pass device is coupled with an output terminal of the solid-state circuit. The control circuit may be coupled with the drive terminal of the pass device and may be configured to drive the pass device with a driving voltage. The leakage current compensation circuit may be configured to receive a leakage current of the pass device and may be configured to forward said leakage current as a bias current to said control circuit.

Linear regulator with temperature compensated bias current

The present document describes a power converter configured to provide energy at an output based on energy provided at an input. The power converter comprises a first switch, wherein a first node is coupled to the input and wherein a second node is coupled to an intermediate point, a second switch, wherein a first node is coupled to the intermediate point and wherein a second node is coupled to an inductor point, a capacitor, wherein a first node of the capacitor is coupled to the intermediate point, a first diode element, wherein a first node is coupled to a second node of the capacitor and wherein a second node is coupled to the inductor point, a second diode element, wherein a first node is coupled to a reference port, and wherein a second node is coupled to the second node of the capacitor; and an inductor, wherein a first node is coupled to the inductor point and wherein a second node is coupled to the output.

Power converter with a high conversion ratio

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.

Indirect leakage compensation for multi-stage amplifiers

A regulator configured to provide at an output node a load current at an output voltage is described. The regulator comprises a pass transistor for providing the load current at the output node. Furthermore, the regulator comprises feedback means for deriving a feedback voltage from the output voltage at the output node. In addition, the regulator comprises a differential amplifier configured to control the pass transistor in dependence of the feedback voltage and in dependence of a reference voltage. The regulator further comprises compensation means configured to determine a sensed current which is indicative of the load current at the output node. Furthermore, the compensation means are configured to adjust an operation point of the regulator in dependence of the sensed current and in dependence of a value of a track impedance of a conductive track which links the output node to a load.

Voltage regulator with impedance compensation

The present document discloses a circuitry for delaying a digital input signal. In particular, the circuitry may comprise a delay cell circuit and a reciprocal current digital-to-analog converter (DAC). The delay cell circuit may be coupled to the reciprocal current DAC. More particularly, the reciprocal current DAC may be configured to output a charge current to the delay cell circuit according to a value of a control input provided to the reciprocal current DAC. The charge current output by the reciprocal current DAC may be inversely proportional to the value of the control input, wherein the delay depends on the charge current.

Linear delay generation circuitry and method

The present document describes a control circuit and a method for controlling a power transistor, wherein the power transistor has a drain, a gate and a source. The power transistor has a body diode. The control circuit is configured to predict a time instant at which a drain potential at the drain falls below a source potential at the source of the power transistor by more than a diode threshold voltage of the body diode. Furthermore, the control circuit is configured to apply a pre-bias potential and/or provide a pre-bias current to the gate of the power transistor in dependence the predicted time instant, such that a conducting channel between the drain and the source is provided, which at least partially takes over current which would otherwise flow through the body diode.

Control circuit and method for avoiding reverse recovery of a power transistor

A switching circuit and a method for providing a switch array having an on resistance is presented. The switch array has a plurality of switches, where each switch is arranged to be in different configuration states. The states include an enabled configuration and a disabled configuration. The switching states include an on state and an off state. Each switch is held in the off state when in the disabled configuration. Control circuitry sets the switches to either the enabled configuration or the disabled configuration, and a memory element coupled to the control circuitry and arranged to store configuration data for setting the configuration state of each of the switches. The control circuitry sets the configuration state of the switches based on a signal received from the memory element. The on resistance of the switch array depends on the switching state of the switches and their individual on resistances.

Switching circuit

A power converter comprising an error amplifier, a reference current circuit branch and load current circuit branch is presented. The error amplifier is configured to generate an error signal based on a reference value and an output signal at an output of the power converter. The reference current circuit branch comprises a modulation device configured to modulate, based on the error signal, a reference current in the reference current circuit branch. The load current circuit branch comprises a first output transistor configured to adjust, based on the reference current, an output current at the output of the power converter. In addition, the power converter may comprise a slave current circuit branch with a second output transistor configured to adjust, based on the reference current, a slave current in the slave current circuit branch for controlling an external slave power converter.

Modular and configurable power converter

A linear regulator with a pass device having a first terminal, a second terminal and a drive terminal is presented. The first terminal of the pass device is coupled with the supply voltage of the linear regulator. The second terminal of the pass device is coupled with the output of the linear regulator. A driver stage is coupled with the supply voltage of the linear regulator, and the drive terminal of the pass device drives the pass device with a driving voltage. A compensating circuit compensates for a change in a voltage difference between the drive terminal of the pass device and the supply voltage of the linear regulator.

Growing community of inventors

Swindon, United Kingdom

Ambreesh Bhattad