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1. 发明授权

US11937509B2 Driver circuitry 有权
公开(公告)号：US11937509B2
公开(公告)日：2024-03-19
申请号：US16951032
申请日：2020-11-18
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： John P. Lesso , Anthony S. Doy
IPC分类号： B06B1/02 , H10N30/80
CPC分类号： H10N30/802 , B06B1/0253 , B06B2201/55
摘要： The present disclosure relates to circuitry for driving a piezoelectric transducer. The circuitry comprises pre-processor circuitry configured to process an input signal to generate a processed signal; driver circuitry coupled to the pre-processor circuitry and configured to generate a drive signal, based on the processed signal, for driving the piezoelectric transducer; and processor circuitry configured to determine a resonant frequency of the piezoelectric transducer. The pre-processor circuitry is configured to process the input signal based on the determined resonant frequency so as to generate the processed signal.

2. 发明授权

US11594958B2 Driver circuitry 有权
公开(公告)号：US11594958B2
公开(公告)日：2023-02-28
申请号：US17538169
申请日：2021-11-30
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Eric J. King , Axel Thomsen , Anthony S. Doy , Thomas H. Hoff , John L. Melanson
IPC分类号： H02M3/07 , H02M3/156
摘要： Driver circuitry for driving a load based on an input signal, comprising: at least one variable boost stage comprising: first and second input nodes configured to receive a first voltage and a second voltage respectively; first and second flying capacitor nodes for connection to a flying capacitor therebetween; a network of switching paths for selectively connecting the first and second input nodes with the first and second flying capacitor nodes; an output stage for selectively connecting a driver output node to each of the first and second flying capacitor nodes; and a controller operable in a first boost mode to: control the output stage to selectively connect the driver output node to the first flying capacitor node; control the network of switching paths to switch connection of the second flying capacitor node between the first and second input nodes at a controlled duty cycle; and in a first charge top-up cycle, control the network of switching paths to connect the first input node to the first flying capacitor node during a phase of the controlled duty cycle in which the first input node is connected to the second flying capacitor node; wherein the frequency of the controlled duty cycle is greater than the frequency of the charge top-up cycle.

3. 发明授权

US10642435B2 False triggering prevention in a resonant phase sensing system 有权
公开(公告)号：US10642435B2
公开(公告)日：2020-05-05
申请号：US16294311
申请日：2019-03-06
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Siddharth Maru , Tejasvi Das , Luke Lapointe , Srdjan Marijanovic , Zhong You , Drew Kinney , Anthony S. Doy , Eric J. King
IPC分类号： G06F3/044 , G06F3/041 , G06F3/045 , G01D5/243 , G01D5/20
CPC分类号： G06F3/044 , G01D5/2006 , G01D5/2026 , G01D5/243 , G06F3/045 , G06F3/0416
摘要： A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor. The system may also include a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals.

4. 发明授权

US11792569B2 Driver circuits 有权
公开(公告)号：US11792569B2
公开(公告)日：2023-10-17
申请号：US18101816
申请日：2023-01-26
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Anthony S. Doy , Eric J. King
IPC分类号： H04R3/00 , H03K17/687 , H03F3/217
CPC分类号： H04R3/00 , H03K17/687 , H03F3/217
摘要： The application describes a switched driver (401) for outputting a drive signal at an output node (402) to drive a load such as a transducer. The driver receives respective high-side and low-side voltages (VinH, VinL) defining an input voltage at first and second input nodes and has connections for first and second capacitors (403H, 403L). A network of switching paths is configured such that each of the first and second capacitors can be selectively charged to the input voltage, the first input node can be selectively coupled to a first node (N1) by a path that include or bypass the first capacitor, and the second input node can be selectively coupled to a second node (N2) by a path that includes or bypasses the second capacitor. The output node (402) can be switched between two switching voltages at the first or second nodes. The driver is selectively operable in different operating modes, where the switching voltages are different in each of said modes.

5. 发明授权

US11296598B1 Driver circuitry 有权
公开(公告)号：US11296598B1
公开(公告)日：2022-04-05
申请号：US17192990
申请日：2021-03-05
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Eric J. King , Axel Thomsen , Anthony S. Doy , Thomas H. Hoff , John L. Melanson
IPC分类号： H02M3/07 , H02M3/156
摘要： Driver circuitry for driving a load based on an input signal, comprising: at least one variable boost stage comprising: first and second input nodes configured to receive a first voltage and a second voltage respectively; first and second flying capacitor nodes for connection to a flying capacitor therebetween; a network of switching paths for selectively connecting the first and second input nodes with the first and second flying capacitor nodes; an output stage for selectively connecting a driver output node to each of the first and second flying capacitor nodes; and a controller operable in a first boost mode to: control the output stage to selectively connect the driver output node to the first flying capacitor node; control the network of switching paths to switch connection of the second flying capacitor node between the first and second input nodes at a controlled duty cycle; and in a first charge top-up cycle, control the network of switching paths to connect the first input node to the first flying capacitor node during a phase of the controlled duty cycle in which the first input node is connected to the second flying capacitor node; wherein the frequency of the controlled duty cycle is a greater than the frequency of the charge top-up cycle.

6. 发明授权

US11277129B2 Driver circuitry and operation 有权
公开(公告)号：US11277129B2
公开(公告)日：2022-03-15
申请号：US17314917
申请日：2021-05-07
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Axel Thomsen , Eric J. King , Anthony S. Doy , Thomas H. Hoff , John L. Melanson
IPC分类号： H03B1/00 , H03K3/00 , H03K17/687 , H02N2/00 , H02M3/158
摘要： 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.

7. 发明授权

US11026035B1 Transducer electrical characteristic and state sensing using multiple voice coils 有权
公开(公告)号：US11026035B1
公开(公告)日：2021-06-01
申请号：US16850184
申请日：2020-04-16
申请人： CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR, LTD.
发明人： Anthony S. Doy
IPC分类号： H04R29/00 , H04R9/02 , H04R9/06 , H04R3/00 , G06F3/01 , H04R9/04 , H04R9/18 , H04R3/04
摘要： An audio output system for energizing a multiple voice coil transducer supplies at least two power output signals to the voice coils, a pilot tone generator for generating a pilot tone signal, and a power output circuit. The power output circuit generates power output signals from the pilot tone and the input signal so that the voice coils respond to the input signal with an in-phase electro-mechanical relationship and respond to the pilot tone with an out-of-phase (motion canceling) electro-mechanical relationship, reducing the effect of the pilot town on mechanical movement of the voice coil. A sensing circuit senses electrical signal values at terminals of the at least two voice coils, and a processing circuit detects a response of the output transducer to the pilot tone and determines at least one operating characteristic of the output transducer from the electrical signal values.

8. 发明授权

US10942610B2 False triggering prevention in a resonant phase sensing system 有权
公开(公告)号：US10942610B2
公开(公告)日：2021-03-09
申请号：US16831323
申请日：2020-03-26
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Siddharth Maru , Tejasvi Das , Luke Lapointe , Srdjan Marijanovic , Zhong You , Drew Kinney , Anthony S. Doy , Eric J. King
IPC分类号： G06F3/044 , G06F3/041 , G06F3/045 , G01D5/243 , G01D5/20
摘要： A system may include a resistive-inductive-capacitive sensor, a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and configured to at a plurality of periodic intervals, measure phase information associated with the resistive-inductive-capacitive sensor and based on the phase information, determine a displacement of a mechanical member relative to the resistive-inductive-capacitive sensor. The system may also include a driver configured to drive the resistive-inductive-capacitive sensor at a driving frequency and a driving amplitude, wherein at least one of the driving frequency and the driving amplitude varies among the plurality of periodic intervals.

9. 发明授权

US10725549B2 Efficient detection of human machine interface interaction using a resonant phase sensing system 有权
公开(公告)号：US10725549B2
公开(公告)日：2020-07-28
申请号：US16294347
申请日：2019-03-06
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Srdjan Marijanovic , Drew Kinney , Luke Lapointe , Siddharth Maru , Tejasvi Das , Anthony S. Doy , Zhong You
IPC分类号： G06F3/01 , G06F3/041 , G06F3/044 , G06F3/045 , G01D5/20 , G01D5/243
摘要： A system may include a tactile actuator for providing tactile feedback and a resonant phase sensing system. The resonant phase sensing system may include a resistive-inductive-capacitive sensor and a measurement circuit communicatively coupled to the resistive-inductive-capacitive sensor and the tactile actuator. The resistive-inductive-capacitive sensor may be configured to measure phase information associated with the resistive-inductive-capacitive sensor, based on the phase information, detect an indication of human interaction with the system proximate to the resistive-inductive-capacitive sensor, and trigger the tactile actuator to generate tactile feedback responsive to detecting the indication of human interaction.

10. 发明授权

US11536758B2 Single-capacitor inductive sense systems 有权
公开(公告)号：US11536758B2
公开(公告)日：2022-12-27
申请号：US16517046
申请日：2019-07-19
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Jason L. Wardlaw , Michael A. Kost , Anthony S. Doy , Tejasvi Das , Siddharth Maru , Xin Zhao , Matthew Beardsworth , Bruce E. Duewer
IPC分类号： G01R27/28 , G01L9/00 , G01H13/00 , G01R27/26 , G01R27/02 , G06F3/01
摘要： A system may include an array of sensor elements, the array of sensor elements each comprising a first type of passive reactive element, a second type of passive reactive element electrically coupled to the array of sensor elements, a driver configured to drive the array of sensor elements and the second type of passive reactive element, and control circuitry configured to control enabling and disabling of individual sensor elements of the array of sensor elements to ensure no more than one of the array of sensor elements is enabled at a time such that when one of the array of sensor elements is enabled, the one of the array of sensor elements and the second type of passive reactive element together operate as a resonant sensor.

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