公开(公告)号：US20170155362A1

公开(公告)日：2017-06-01

申请号：US14956189

申请日：2015-12-01

Applicant: ANALOG DEVICES GLOBAL

Inventor： Sivanendra Selvanayagam

IPC: H03D7/14 ,  H04B1/16 ,  H03K5/156

CPC classification number: H03D7/1441 ,  H03D7/1466 ,  H03K5/1565 ,  H04B1/0082 ,  H04B1/16

Abstract: Provided herein are oscillator paths between an oscillator and mixers. In an embodiment, the oscillator paths include a first path between an oscillator and a first mixer and a second path between the oscillator and the second mixer, in which the first path is enabled in a first state (e.g., a low band state) and the second path is enabled in a second state (e.g., a high band state). The first path can include a radio frequency divider configured to receive a signal having the oscillator frequency and to divide the signal in frequency by a positive odd integer divisor greater than one, and a duty cycle correction circuit configured to receive an output from the radio frequency divider and provide an output having a duty cycle that is closer to 50% than the output from the divider. Such separate oscillator paths can, for example, enhance receiver performance.

公开(公告)号：US09667291B2

公开(公告)日：2017-05-30

申请号：US14527608

申请日：2014-10-29

Applicant: ANALOG DEVICES GLOBAL

Inventor： Patrick Joseph Pratt

IPC: H04B1/12

CPC classification number: H04B1/123

Abstract: A system is described for forming an estimate of an unwanted signal component that may be formed as a result of non-linearities in a system. The estimate is used to form a cancellation signal which is added to an input signal to reduce the influence of the unwanted component.

公开(公告)号：US09667244B1

公开(公告)日：2017-05-30

申请号：US14942637

申请日：2015-11-16

Applicant: Analog Devices Global

Inventor： Bilal Tarik Cavus ,  Turusan Kolcuoglu ,  Yusuf Alperen Atesal

IPC: H03B1/00 ,  H03K3/00 ,  H03K17/687

CPC classification number: H03K17/687 ,  H03K17/145 ,  H03K17/693

Abstract: A control circuit is provided for controlling the voltage at the gate terminal of a field effect transistor acting as a switch. The voltage, at for example, the source terminal of the transistor can be provided to a low pass filter and is then voltage translated to provide the gate signal. The filtering can be arranged so as to compensate for the effect of parasitic capacitances within the transistor, thereby linearizing its frequency response. The voltage translation can help to limit voltage differences between the gate and channel of the transistor. This can be significant as relatively fast transistors, as might be used in microwave circuits, may fail with relatively modest voltages at their gates.

公开(公告)号：US09660848B2

公开(公告)日：2017-05-23

申请号：US14486937

申请日：2014-09-15

Applicant: Analog Devices Global

Inventor： Ruida Yun ,  Yuanjie Sun ,  Baoxing Chen

IPC: H04L27/04 ,  H03B5/12 ,  H03C1/60

CPC classification number: H04L27/04 ,  H03B5/1215 ,  H03B5/1228 ,  H03C1/60 ,  H04L25/0286

Abstract: An oscillator for a signal isolator system includes a capacitor and an inductor connected in parallel, two pairs of cross-coupled switches and a control switch. The capacitor, the inductor and the cross-coupled switches form an oscillator. The control switch controls operation of the oscillator between an ON state and an OFF state in response to a data signal to be communicated across an isolation barrier. The inductor may be formed from a winding of an isolation transformer, which reduces component count as compared to a system that provides a separate inductor. Other embodiments may include a current-supplying kickstart circuit and a shorting transistor that can speed transition between the ON and OFF states.

公开(公告)号：US09660628B2

公开(公告)日：2017-05-23

申请号：US14563559

申请日：2014-12-08

Applicant: Analog Devices Global

Inventor： Sherwin Paul Roldan Almazan ,  George Redfield Spalding, Jr.

IPC: H03K3/00 ,  H03K5/1534 ,  H03K17/687 ,  H03K3/0231 ,  H03K5/153

CPC classification number: H03K5/1534 ,  H03K3/0231 ,  H03K5/153 ,  H03K17/6871

Abstract: A timer circuit is provided comprising: a resistor; a programmable gain circuit coupled to amplify the reference level based upon a resistor and a selected gain; a detection circuit coupled to identify the amplified reference level based upon a resistor; a selection circuit configured to select the gain based at least in part upon the identified amplified reference level based upon a resistor; a comparator circuit configured to transition between providing a signal having a first value and providing a signal having a second value based at least in part upon comparisons of a reactive circuit element excitation level with the amplified reference level based upon a resistor and with a second reference level; and reactive circuit element excitation circuit configured to reverse excitation of the reactive circuit element in response to the comparator circuit transitioning between providing the signal having the first value and providing the signal having the second value.

公开(公告)号：US09612288B2

公开(公告)日：2017-04-04

申请号：US14169667

申请日：2014-01-31

Applicant: Analog Devices Global

Inventor： Hua-Jung Yang ,  Janne Klemetti

IPC: H02J7/00 ,  H02J7/14 ,  G01R31/36

CPC classification number: G01R31/3651 ,  G01R31/3624 ,  G01R31/3675 ,  H02J7/0016 ,  H02J7/0021 ,  H02J7/0031 ,  H02J7/0036 ,  H02J7/0073

Abstract: A device to determine a state of a battery is disclosed. One or more transistors provide a resistance between first and second nodes. The one or more transistors are configured to conduct a supply current from a battery between the first node and the second node. A measurement circuit measures the voltage generated between the first node and the second node. The measurement circuit further measures the supply voltage. A calculation circuit generates an estimate of the supply current based on the voltage measured between the first node and the second node and the resistance of the one or more transistors. The calculation circuit generates an estimate of the state of charge of the battery based on the measured supply voltage and the estimate of the supply current.

公开(公告)号：US09600015B2

公开(公告)日：2017-03-21

申请号：US14531541

申请日：2014-11-03

Applicant: Analog Devices Global

Inventor： Stefan Marinca

IPC: G05F3/30

CPC classification number: G05F3/30

Abstract: Early effects are intrinsically present in bipolar junction transistors (BJTs). Described are examples of complimentary to absolute temperature (CTAT) and proportional to absolute temperature (PTAT) cells that reduce errors associated with the Early effects that would otherwise be present.

公开(公告)号：US20170067962A1

公开(公告)日：2017-03-09

申请号：US14935644

申请日：2015-11-09

Applicant: ANALOG DEVICES GLOBAL

Inventor： Richard E. Schreier ,  Alexander Newcombe ,  Ross Willett ,  Andre Straker

IPC: G01R31/317 ,  H04L29/08 ,  G01R31/3177

CPC classification number: G01R31/31718 ,  G01R31/31707 ,  G01R31/31724 ,  G01R31/3177 ,  G01R31/318314 ,  G06F11/2294 ,  H04L67/02 ,  H04L67/10 ,  H04L67/125

Abstract: Remote evaluation, e.g., web-based evaluation, lowers the evaluation barrier by allowing an engineer to gain experience with an integrated circuit (IC) using a client (e.g. a web browser) on a remote computer (e.g., a machine remote from the IC being evaluated but local to the engineer) to activate a test set-up that is maintained at a location that is far away from the engineer.

Abstract translation: 远程评估，例如基于网络的评估，通过允许工程师使用远程计算机上的客户端（例如，Web浏览器）获得集成电路（IC）的经验来降低评估壁垒（例如，远离IC的机器 被评估，但工程师本地）激活在远离工程师的位置保持的测试设置。

公开(公告)号：US09577509B2

公开(公告)日：2017-02-21

申请号：US14260690

申请日：2014-04-24

Applicant: Analog Devices Global

Inventor： Basa Wang ,  Zhijie Zhu

IPC: H02M1/32 ,  H02M3/156 ,  H02M1/00

CPC classification number: H02M1/32 ,  H02M3/156 ,  H02M2001/0009

Abstract: An apparatus comprises a switching circuit, an error amplifier circuit, a current threshold circuit, and an over-current detection circuit. The switching circuit provides a switching duty cycle that includes a charge portion and a discharge portion. The error amplifier circuit generates an error signal representative of a difference between a target voltage value and a voltage at an output of the voltage regulator circuit. The switching circuit adjusts the switching duty cycle to regulate the voltage at the output using the error signal and a reference waveform signal. The current threshold circuit generates an adaptive peak current limit threshold. The over-current detection circuit generates an over-current signal when the reference waveform signal satisfies the adaptive peak current limit threshold during the charging portion of the switching cycle. The switching circuit interrupts one or more switching cycles when the reference waveform signal satisfies the adaptive peak current limit threshold.

Abstract translation: 一种装置包括开关电路，误差放大器电路，电流阈值电路和过电流检测电路。 开关电路提供包括充电部分和放电部分的开关占空比。 误差放大器电路产生表示目标电压值与电压调节器电路输出端的电压之差的误差信号。 开关电路调整开关占空比，以使用误差信号和参考波形信号来调节输出端的电压。 电流阈值电路产生自适应峰值电流限制阈值。 当在开关周期的充电部分中参考波形信号满足自适应峰值电流限制阈值时，过电流检测电路产生过电流信号。 当参考波形信号满足自适应峰值电流限制阈值时，开关电路中断一个或多个开关周期。

公开(公告)号：US20170041552A1

公开(公告)日：2017-02-09

申请号：US14821395

申请日：2015-08-07

Applicant: ANALOG DEVICES GLOBAL

Inventor： Javier CALPE MARAVILLA ,  Eoin E. ENGLISH ,  Rafael MAHIQUES ,  Jose Carlos CANADA ,  Maria Jose MARTINEZ

IPC: H04N5/232

Abstract: Actuators are used to move a variety of objects to desired positions. It is generally desirable that they can do this quickly without exhibiting overshoot or ringing. Some actuators are required to respond very quickly and examples of these are voice coil drivers used to move lenses in autofocus cameras provided in everyday devices such as smart phones and tablets. A rapid two step controller scheme had already been disclosed by Analog Devices Inc. Whilst the scheme works well, it can only be used reliably if the resonant frequency of the actuator is known to within 2 or 3%. The inventors have discovered that the resonant frequency of an actuator unexpectedly changes as a function of position. This disclosure provides ways of modifying the control scheme to cope with changes in resonant frequency.

Abstract translation: 致动器用于将各种物体移动到所需位置。 通常希望它们可以快速地进行，而不会出现过冲或振铃。 一些执行器需要很快的响应，其中的例子是用于在诸如智能手机和平板电脑的日常设备中提供的自动对焦相机中移动透镜的音圈驱动器。 ADI公司已经公布了一个快速的两步控制器方案。虽然该方案工作正常，但是如果致动器的谐振频率已知为2％或3％，则只能可靠地使用该方案。 发明人已经发现，致动器的谐振频率意外地作为位置的函数而改变。 本公开提供了修改控制方案以应对谐振频率变化的方式。