公开(公告)号：US09521712B1

公开(公告)日：2016-12-13

申请号：US14445732

申请日：2014-07-29

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Arnab Kumar Dutta ,  Stephen Hodapp ,  Prashanth Drakshapalli

IPC: G01R19/00 ,  H05B33/08 ,  G01R27/26 ,  G01R27/02

CPC classification number: G01R27/2605 ,  G01R27/14 ,  H05B33/0842

Abstract: Multiple measurements may be obtained via a single pin of an integrated circuit (IC) to set multiple control parameters of a light emitting diode (LED) controller within the IC. For example, a first input signal may be applied from the IC to two or more components via a single IC pin. A first output signal may be obtained from the two or more components via the single IC pin. A second input signal may be applied from the IC to the two or more components via the single IC pin, and a second output signal may be obtained from the two or more components via the single IC pin. A first parameter and a second parameter of the two or more components may be calculated based, at least in part, on the first output signal and the second output signal obtained via the single IC pin.

Abstract translation: 可以通过集成电路（IC）的单个引脚获得多个测量值，以设置IC内的发光二极管（LED）控制器的多个控制参数。 例如，可以经由单个IC引脚从IC向两个或更多个组件施加第一输入信号。 可以经由单个IC引脚从两个或更多个组件获得第一输出信号。 可以经由单个IC引脚从IC向两个或更多个部件施加第二输入信号，并且可以经由单个IC引脚从两个或更多个部件获得第二输出信号。 可以至少部分地基于经由单个IC引脚获得的第一输​​出信号和第二输出信号来计算两个或更多个组件的第一参数和第二参数。

公开(公告)号：US20160255685A1

公开(公告)日：2016-09-01

申请号：US14634716

申请日：2015-02-27

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Ramin Zanbaghi ,  Thirumalai Rengachari ,  Prashanth Drakshapalli ,  Rahul Singh ,  Arnab Kumar Dutta

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H02M3/335 ,  H05B33/0845 ,  H05B33/0887 ,  H05B37/02

Abstract: A bipolar junction transistor (BJT) may be used in a power stage DC-to-DC converter, such as a converter in LED-based light bulbs. The power stage may be operated by a controller to maintain a desired current output to the LED load. The controller may operate the power stage by monitoring a start and end of a reverse recovery time of the BJT. Information regarding the start and end of the reverse recovery time may be used in the control of the power stage to improve efficiency of the power stage.

Abstract translation: 双极结型晶体管（BJT）可用于功率级DC-DC转换器，例如基于LED的灯泡中的转换器。 功率级可以由控制器操作以保持对LED负载的期望的电流输出。 控制器可以通过监视BJT的反向恢复时间的开始和结束来操作功率级。 关于反向恢复时间的开始和结束的信息可以用于功率级的控制，以提高功率级的效率。

公开(公告)号：US09329614B1

公开(公告)日：2016-05-03

申请号：US13837830

申请日：2013-03-15

Applicant: Cirrus Logic, Inc.

Inventor： Prashanth Drakshapalli ,  John L. Melanson ,  Rod Holley ,  Thirumalai Rengachari ,  Ruoxin Jiang ,  Eric Swanson

IPC: G05F3/02 ,  G01R31/28 ,  G01R31/30 ,  G01R31/317 ,  H01L21/66

CPC classification number: G05F3/02 ,  G01R31/2875 ,  G01R31/2884 ,  G01R31/3004 ,  G01R31/31701 ,  H01L22/34

Abstract: In one embodiment a heating mechanism is provided with an integrated circuit for testing and calibration purposes. During production testing, heating elements may be activated in order to quickly bring an integrated circuit up to operating temperature for temperature testing or calibration. Once the operating test temperature has been reached, the circuit can be quickly and easily tested to show it is operable within the design temperature range and/or to obtain calibration data to correct for temperature drift. Calibration data may be used to create correction data, which may be stored within the integrated circuit. During normal operation, the correction data may be used to compensate for variations in operation due to temperature.

Abstract translation: 在一个实施例中，加热机构设置有用于测试和校准目的的集成电路。 在生产测试期间，可以激活加热元件，以便快速将集成电路带到工作温度进行温度测试或校准。 一旦达到了工作测试温度，该电路就可以快速方便地进行测试，以显示其在设计温度范围内可操作和/或获得校准数据以校正温度漂移。 可以使用校准数据来创建可以存储在集成电路内的校正数据。 在正常操作期间，可以使用校正数据来补偿由于温度导致的操作变化。

公开(公告)号：US08970413B1

公开(公告)日：2015-03-03

申请号：US13799323

申请日：2013-03-13

Applicant: Cirrus Logic, Inc.

Inventor： John L. Melanson ,  Rahul Singh ,  Prashanth Drakshapalli ,  Dale Brummel

IPC: H03M3/00 ,  H03M1/00

CPC classification number: H03M3/32

Abstract: A low power analog-to-digital converter (ADC) may sense current output of a geophone instead of voltage. The output of the geophone may be terminated through a resistor into a virtual ground of an integrator, which may be located inside a current mode delta-sigma analog-to-digital converter. The integrator may have a current mode or a charge mode feedback. Thus, the geophone may experience constant or substantially constant impedance terminated into a virtual ground. This approach may eliminate an instrumentation amplifier from a geophone sensing circuit, while still allowing for accurate sensing of geophone signals. The instrumentation amplifier is a major current consumer from the signal path, so its elimination may significantly reduce power consumption. The instrumentation amplifier may be eliminated, at least in part because of the provision of the resistance into a virtual ground of an integrator of the delta-sigma ADC.

Abstract translation: 低功耗模数转换器（ADC）可以感测地震检波器的电流输出而不是电压。 地震检波器的输出可以通过电阻器终止到积分器的虚拟地，该积分器可以位于电流模式的Δ-Σ模数转换器内。 积分器可以具有电流模式或充电模式反馈。 因此，地震检波器可能经历恒定或基本恒定的阻抗终止于虚拟地面。 这种方法可以从地震检波器感测电路中消除仪表放大器，同时仍能准确地感测地震检波器信号。 仪表放大器是信号路径的主要消费者，因此其消除可能显着降低功耗。 至少部分地由于向Δ-ΣADC的积分器的虚拟接地提供电阻，可以消除仪表放大器。