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1.发明申请BEMF MONITOR GAIN CALIBRATION STAGE IN HARD DISK DRIVE SERVO INTEGRATED CIRCUIT 有权硬盘驱动器集成电路中的BEMF监视器增益校准阶段公开(公告)号：US20130200954A1
公开(公告)日：2013-08-08
申请号：US13759848
申请日：2013-02-05
Applicant: Texas Instruments Incorporated
Inventor： Qunying Li , Wenxiao Tan , Gregory Swize
IPC: H03G3/00
CPC classification number: H03G3/00 , H03G1/0088 , H03G3/001
Abstract: A high performance digitalized Programmable Gain Amplifier (PGA). In prior art circuit, a dual-ladder DAC is employed for gain control, the back gate leakage of NMOS resistors in the fine ladder conquers fine ladder nominal current and it produces non-monotonic gain scallop. Two new art design techniques: (1) adaptively control the fine ladder; and (2) use dummy PMOS brunch device leakage compensates for the NMOS resistor device leakage, are proposed so that the non-monotonic scallops are substantially eliminated and 13-bit resolution/accuracy PGA has been achieved.
Abstract translation: 高性能数字化可编程增益放大器（PGA）。 在现有技术的电路中，采用双梯形DAC进行增益控制，精细梯形图中的NMOS电阻的背栅极泄漏征服了细梯级标称电流，并产生非单调增益扇贝。 两种新的艺术设计技巧：（1）适应性地控制细梯; 并且（2）使用虚拟PMOS快速装置漏电补偿NMOS电阻器件泄漏，从而基本上消除了非单调扇贝，并且已经实现了13位分辨率/精度PGA。
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公开(公告)号：US12088289B2
公开(公告)日：2024-09-10
申请号：US17350727
申请日：2021-06-17
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Shanmuganand Chellamuthu , Qunying Li , Vikram Joseph Mani
IPC: H03K17/95 , H03B5/04 , H03B5/12 , H03K17/732
CPC classification number: H03K17/9542 , H03B5/04 , H03B5/1209 , H03K17/732
Abstract: A system includes a sensor integrated circuit (IC), including a driver adapted to be coupled to an oscillator, the driver including first and second transistors. The sensor IC includes an amplitude control amplifier coupled to the first transistor. The sensor IC also includes a common mode control amplifier coupled to the second transistor. The sensor IC includes a handover control circuit coupled to the amplitude control amplifier and configured to hand off an operation from the sensor IC to a different sensor IC, the handover control circuit including a resistor network coupled to a switch network.
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公开(公告)号：US11598802B2
公开(公告)日：2023-03-07
申请号：US17168528
申请日：2021-02-05
Applicant: Texas Instruments Incorporated
Inventor： Kemal Safak Demirci , Shanmuganand Chellamuthu , Qunying Li
Abstract: A circuit includes a gain stage, first and second amplifiers, and a comparison circuit. The gain stage has an input and an output. The first amplifier has an input and an output. The input of the first amplifier is coupled to the input of the gain stage. The second amplifier has an input and an output. The input of the second amplifier is coupled to the output of the gain stage. The comparison circuit is coupled to the outputs of the first and second amplifiers. The comparison circuit is configured to compare signals on the outputs of the first and second amplifiers and to generate a fault flag signal responsive to the output signal from the first amplifier being different than the output signal from the second amplifier.
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公开(公告)号：US20180115268A1
公开(公告)日：2018-04-26
申请号：US15331213
申请日：2016-10-21
Applicant: Texas Instruments Incorporated
Inventor： Qunying Li , Joao Carlos Felicio Brito , Wenxiao Tan
IPC: H02P25/034 , H02P7/03
CPC classification number: H02P25/034 , H02P7/04
Abstract: Methods and apparatus providing a smooth transition from a pulse width modulation mode to a linear mode to drive a voice coil motor are disclosed. An example apparatus includes an H-bridge; a pulse generator to generate a pulse when the voice coil motor driver transitions from pulse width modulation mode to linear mode; a first boost circuit to, when the pulse is generated, increase a first current being applied to a first gate of a first transistor in the H-bridge, the increase in the first current enabling the first transistor; and a second boost circuit to, when the pulse is generated, provide an additional path to ground from a node coupled to a second gate of a second transistor of the H bridge, the path to ground corresponding to a voltage drop that disables the second transistor.
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公开(公告)号：US10884037B2
公开(公告)日：2021-01-05
申请号：US15263114
申请日：2016-09-12
Applicant: Texas Instruments Incorporated
Abstract: An angular resolver system includes, for example, an imbalance detector for detecting degraded resolver output signals. The imbalance detector includes a first and second power averaging circuits and a comparator circuit. The first power averaging circuit includes a first integrator for generating over a first time window a first average power signal in response to resolver sensor output signals. The second power averaging circuit includes a second integrator for generating over a second time window a second average power signal in response to the resolver sensor output signals, where the first time window is longer than the second time window. The comparator circuit compares the first average power signal and the second average power signal and generates a fault signal when the first average power signal and the second average power signal differ by a selected voltage threshold.
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Patent Agency Ranking
公开(公告)号：US10784873B1
公开(公告)日：2020-09-22
申请号：US16391865
申请日：2019-04-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Qunying Li , Shanmuganand Chellamuthu , Kemal Safak Demirci
Abstract: A circuit includes a bandpass filter and a self-tracking circuit. The bandpass filter has a first input node configured to receive an input square wave signal and an output node configured to provide an output sine wave signal. The bandpass filter includes a first binary-weighted programmable resistor array. The self-tracking circuit includes a second input node coupled to the output node. The self-tracking circuit includes a counter, and the counter includes an output node coupled to the first binary weighted programmable resistor array.
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公开(公告)号：US09252691B2
公开(公告)日：2016-02-02
申请号：US13965628
申请日：2013-08-13
Applicant: Texas Instruments Incorporated
Inventor： Qunying Li , Joao Carlos Felicio Brito
CPC classification number: H02P6/182
Abstract: One embodiment includes a back-electromagnetic force (BEMF) sense system. The system includes a sense amplifier configured to measure an amplitude of a selected one of a plurality of phase voltages relative to a center tap voltage associated with a servo motor for the calculation of an associated BEMF voltage. The plurality of phase voltages can be provided to the sense amplifier via a respective plurality of control nodes. The selected one of the plurality of phase voltages on a respective one of the control nodes can be selected based on coupling the other of the plurality of control nodes associated with the other of the plurality of phase voltages to a voltage source configured to provide a predetermined voltage magnitude.
Abstract translation: 一个实施例包括反电磁力（BEMF）感测系统。 该系统包括读出放大器，其被配置为相对于与伺服电动机相关联的中心抽头电压来测量多个相电压中所选择的一个的幅度，用于计算相关联的BEMF电压。 可以经由相应的多个控制节点将多个相电压提供给读出放大器。 可以基于将与多个相电压中的另一个相关联的多个控制节点中的另一个耦合到被配置为提供预定的电压源的电压源来选择控制节点上的相应一个控制节点上的所述多个相电压中的所选择的一个 电压幅度。
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公开(公告)号：US20150346699A1
公开(公告)日：2015-12-03
申请号：US14821282
申请日：2015-08-07
Applicant: Texas Instruments Incorporated
Inventor： Qunying Li , Juergen Luebbe , Robert E. Whyte, JR.
IPC: G05B11/32
Abstract: An integrated circuit includes a motor current input voltage-to-current (VI) converter that receives a motor current sensor voltage from a motor and a reference voltage to generate an output current related to a motor's current. A motor current calibration VI converter compensates for errors in the motor current input VI converter and generates a calibration output current based on the reference voltage, wherein the output current and the calibration output current are combined to form an estimate of the motor's current.
Abstract translation: 集成电路包括电动机电流输入电压 - 电流（VI）转换器，其接收来自电动机的电动机电流传感器电压和参考电压，以产生与电动机电流相关的输出电流。 电动机电流校准VI转换器补偿电动机电流输入VI转换器中的误差，并基于参考电压产生校准输出电流，其中输出电流和校准输出电流被组合以形成电动机电流的估计。
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公开(公告)号：US09136787B2
公开(公告)日：2015-09-15
申请号：US14048672
申请日：2013-10-08
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Qunying Li , Juergen Luebbe , Robert E. Whyte, Jr.
Abstract: An integrated circuit includes a motor current input voltage-to-current (VI) converter that receives a motor current sensor voltage from a motor and a reference voltage to generate an output current related to a motor's current. A motor current calibration VI converter compensates for errors in the motor current input VI converter and generates a calibration output current based on the reference voltage, wherein the output current and the calibration output current are combined to form an estimate of the motor's current.
Abstract translation: 集成电路包括电动机电流输入电压 - 电流（VI）转换器，其接收来自电动机的电动机电流传感器电压和参考电压以产生与电动机电流相关的输出电流。 电动机电流校准VI转换器补偿电动机电流输入VI转换器中的误差，并基于参考电压产生校准输出电流，其中输出电流和校准输出电流被组合以形成电动机电流的估计。
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公开(公告)号：US11611323B2
公开(公告)日：2023-03-21
申请号：US16591288
申请日：2019-10-02
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Qunying Li , Shanmuganand Chellamuthu
Abstract: An automatic gain control circuit includes a linear-to-log conversion circuit, a current amplifier circuit, and an amplitude sense circuit. The current amplifier circuit includes a current input terminal coupled to an output terminal of the linear-to-log conversion circuit. The amplitude sense circuit includes an input terminal coupled to an output terminal of the current amplifier circuit, and an output terminal coupled to a gain control input terminal of the current amplifier circuit.
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