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公开(公告)号：US20250147078A1
公开(公告)日：2025-05-08
申请号：US18590241
申请日：2024-02-28
Inventor： Hemant SHUKLA , Sven SOELL , Paul WILSON , Deep SAXENA , Beata K. KUBIAK , Ross C. MORGAN , Malcolm BLYTH , Angus BLACK
Abstract: A current sensing system for sensing current through first and second circuit elements of a circuit in which the first and second circuit elements are active in respective first and second phases of an operational cycle of the circuit, the current sensing system comprising: first current sensing circuitry for sensing a current through the first circuit element; second current sensing circuitry for sensing a current through the second circuit element; and summation circuitry coupled to an output of the first current sensing circuitry and an output of the second current sensing circuitry, wherein the summation circuitry is configured to output a summation signal indicative of a sum of the sensed current through the first circuit element and the sensed current through the second circuit element so as to provide an indication of a total current drawn over an operational cycle of the circuit.
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公开(公告)号：US20160276984A1
公开(公告)日：2016-09-22
申请号：US15165737
申请日：2016-05-26
Inventor： Malcolm BLYTH , Graeme Gordon MACKAY
CPC classification number: H03F1/0227 , H03F3/183 , H03F3/68 , H03F2200/03 , H03F2200/102
Abstract: Methods and apparatus for detection and tracking of a signal envelope. The circuit comprises absolute value circuitry configured to receive data samples and output a first value corresponding to the magnitude of said data samples. An envelope tracker maintains an envelope output value and compares the first value to the current envelope output value and modifies the envelope output value based on said comparison to provide the envelope output value with predetermined attack and decay characteristics. The absolute value circuitry has a first input for receiving a first digital signal at a first sample rate and a second input for receiving an interpolated version of the first digital signal at a second sample rate which is higher than the first sample rate and outputs the first value based on the magnitudes of the samples received at the first input and the samples received at the second input. Using the first digital signal provides an early indication of any increases in signal envelope whereas the second digital signal can allow a more accurate estimation.
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公开(公告)号：US20230396167A1
公开(公告)日：2023-12-07
申请号：US18453747
申请日：2023-08-22
Inventor： Malcolm BLYTH
IPC: H02M3/158 , H02M3/157 , H03K3/0233 , H03K5/24 , G01R19/165 , H02M1/00
CPC classification number: H02M3/158 , H02M3/157 , H03K3/02337 , H03K5/24 , G01R19/16538 , H02M1/0009
Abstract: Control circuitry for controlling a current through an inductor of a power converter, the control circuitry comprising: comparison circuitry configured to compare a measurement signal, indicative of a current through the inductor during a charging phase of the power converter, to a signal indicative of a target average current through the inductor for the charging phase and to output a comparison signal based on said comparison; detection circuitry configured to detect, based on the comparison signal, a crossing time indicative of a time at which the current through the inductor during the charging phase is equal to the target average current for the charging phase; and current control circuitry configured to control a current through the inductor during a subsequent charging phase based on the crossing time.
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公开(公告)号：US20220037999A1
公开(公告)日：2022-02-03
申请号：US17245188
申请日：2021-04-30
Inventor： Malcolm BLYTH
IPC: H02M3/158 , H02M3/157 , H02M1/00 , H03K5/24 , G01R19/165 , H03K3/0233
Abstract: Control circuitry for controlling a current through an inductor of a power converter, the control circuitry comprising: comparison circuitry configured to compare a measurement signal, indicative of a current through the inductor during a charging phase of the power converter, to a signal indicative of a target average current through the inductor for the charging phase and to output a comparison signal based on said comparison; detection circuitry configured to detect, based on the comparison signal, a crossing time indicative of a time at which the current through the inductor during the charging phase is equal to the target average current for the charging phase; and current control circuitry configured to control a current through the inductor during a subsequent charging phase based on the crossing time.
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公开(公告)号：US20250070671A1
公开(公告)日：2025-02-27
申请号：US18946316
申请日：2024-11-13
Inventor： Malcolm BLYTH , John B. BOWLERWELL , Alastair M. BOOMER , Holger HAIPLIK
Abstract: Current detection circuitry for generating an average inductor current signal indicative of an average inductor current during an operational cycle of power converter circuitry, the current detection circuitry comprising: circuitry for generating a peak inductor current signal indicative of a peak inductor current during the operational cycle; and circuitry for applying a ripple current estimate signal, indicative of an estimate of half of a ripple current in the power converter circuitry, to the peak inductor current signal to generate the average inductor current signal, wherein the ripple current is equal to a difference between the average inductor current and the peak inductor current.
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Patent Agency Ranking
公开(公告)号：US20240429821A1
公开(公告)日：2024-12-26
申请号：US18698674
申请日：2022-11-29
Inventor： Malcolm BLYTH , John B. BOWLERWELL , Alastair M. BOOMER , Holger HAIPLIK
Abstract: Current detection circuitry for generating an average inductor current signal indicative of an average inductor current during an operational cycle of power converter circuitry, the current detection circuitry comprising: circuitry for generating a peak inductor current signal indicative of a peak inductor current during the operational cycle; and circuitry for applying a ripple current estimate signal, indicative of an estimate of half of a ripple current in the power converter circuitry, to the peak inductor current signal to generate the average inductor current signal, wherein the ripple current is equal to a difference between the average inductor current and the peak inductor current.
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公开(公告)号：US20220368325A1
公开(公告)日：2022-11-17
申请号：US17874357
申请日：2022-07-27
Inventor： Axel THOMSEN , Eric J. KING , Thomas H. HOFF , John L. MELANSON , Angus BLACK , Ross C. MORGAN , Malcolm BLYTH
IPC: H03K17/687 , H02N2/00 , H02M3/158
Abstract: This application relates to methods and apparatus for driving a transducer with switching drivers. A switching driver has first and second supply node for receiving supply voltages and includes an output bridge stage, a capacitor and a network of switches. The network of switches is operable in different switch states to provide different switching voltages to the output bridge stage. A controller is configured to control the switch state of the network of switches and a duty cycle of output switches of the output bridge stage based on an input signal to generate an output signal for driving the transducer.
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公开(公告)号：US20250047275A1
公开(公告)日：2025-02-06
申请号：US18364027
申请日：2023-08-02
Inventor： Malcolm BLYTH , Ross C. MORGAN , Michael ROBINSON
IPC: H03K17/082 , H04R3/00 , H04R29/00
Abstract: This application relates to methods and apparatus for current monitoring in switched mode drivers. A switching driver has an output stage with a network of switches for switching an output node between different switching voltages and a modulator for controlling a duty-cycle of the switching output stage based on the input signal, where the modulator generates a modulator signal based on the input signal. A current monitor is configured to receive a first current signal indicative of a sensed first driver current and to determine and/or limit a second driver current using the first current signal and the modulator signal. One of the first driver current and the second driver current is an output current to the load and the other of the first driver current and the second driver current is an input current from a power supply.
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公开(公告)号：US20240288477A1
公开(公告)日：2024-08-29
申请号：US18533477
申请日：2023-12-08
Inventor： Alastair M. BOOMER , John B. BOWLERWELL , Malcolm BLYTH , Eric J. KING
CPC classification number: G01R21/06 , G01R31/2837 , H02H7/20
Abstract: A system for estimating power dissipation in an integrated circuit comprising a power converter and an amplifier, the system comprising processing circuitry configured to: receive a signal indicative of an output voltage to a load which, in use of the integrated circuit, is driven by the amplifier; receive a signal indicative of an output current to the load; determine an output power value based on the received signal indicative of the output voltage to the load and the received signal indicative of the output current to the load; receive a signal indicative of an input voltage to the power converter; receive a signal indicative of an average current input to the power converter; determine an input power value based on the received signal indicative of the input voltage to the power converter and the received signal indicative of the average current input to the power converter; and determine a power dissipation value based on the determined output power value and the determined input power value.
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公开(公告)号：US20240266948A1
公开(公告)日：2024-08-08
申请号：US18415208
申请日：2024-01-17
Inventor： John B. BOWLERWELL , Eric J. KING , Alastair M. BOOMER , Malcolm BLYTH
CPC classification number: H02M1/327 , H01L23/34 , H02M1/0009 , H02M3/156
Abstract: A method for controlling an input current limit of boost converter circuitry, the method comprising: receiving a power dissipation value for the boost converter circuitry; and controlling an input current limit of the boost converter circuitry based on the power dissipation value.
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