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公开(公告)号：EP2507908A1
公开(公告)日：2012-10-10
申请号：EP09806055.1
申请日：2009-11-30
摘要： A device implementing a scheme for reduction of pop-up noise is disclosed. The device comprises an audio subsystem (100) having an integrator (112) for amplifying an input signal (133) and a modulation circuit (114) including one or more comparators. The audio subsystem (100) is further provided with a feedback loop (142) across the integrator (112) and the modulation circuit (114) to calibrate an offsets outputs of the integrator (112) and the modulation circuit (114). The feedback loop (142) includes an integrator-offset loop (202) across the integrator (112) to calibrate an offset (136) in the output of the integrator (112), and an offset calibration loop (302) across the modulation circuit (114) to calibrate an offset (140) in the output of the modulation circuit (114).
摘要翻译： 公开了实现用于减少弹出噪声的方案的设备。 该设备包括具有用于放大输入信号（133）的积分器（112）和包括一个或多个比较器的调制电路（114）的音频子系统（100）。 音频子系统（100）还在积分器（112）和调制电路（114）上设置有反馈回路（142），以校准积分器（112）和调制电路（114）的偏移输出。 反馈环路（142）包括跨越积分器（112）的积分器偏移环路（202）以校准积分器（112）的输出中的偏移（136），以及越过调制电路（112）的偏移校准环路（302） （114）校准调制电路（114）的输出中的偏移（140）。
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公开(公告)号：EP2486651A1
公开(公告)日：2012-08-15
申请号：EP10788409.0
申请日：2010-10-08
CPC分类号： H03F3/2173 , H03F1/26 , H03F2200/03 , H03F2200/33 , H03F2200/351 , H03F2200/384 , H03K7/08
摘要： A device and a method for implementing pulse width modulation for switching amplifiers (120) is described herein. In one embodiment, the device includes a sampling signal generator (202) to generate a sampling signal (208) and a modulation unit (102) operatively coupled to the sampling signal generator (202). The modulation unit (102) generates differential pulse width modulated waveforms based on the sampling signal (208) and differential input signals (220-1 and 220-2) such that at least one differential pulse width modulated waveform has a duty cycle equivalent to a pre-determined non-zero minimum pulse width at all values of the differential input signals (220-1 and 220-2).
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公开(公告)号：EP2513657B1
公开(公告)日：2014-02-19
申请号：EP10798028.6
申请日：2010-12-10
申请人： ST-Ericsson SA
CPC分类号： G01R31/024 , G01R31/2635 , H05B33/0893
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5.发明公开POWER MANAGEMENT UNIT COMPRISING A SINGLE INDUCTOR MULTI OUTPUT (SIMO) DC-DC CONVERTER 有权麻省理工学院SIMO-GLEICHSPANNUNGSWANDLER LEISTUNGSVERWALTUNGSEINHEIT
公开(公告)号：EP2622723A2
公开(公告)日：2013-08-07
申请号：EP11767230.3
申请日：2011-09-30
申请人： ST-Ericsson SA
IPC分类号： H02M3/157
CPC分类号： H02M3/158 , H02M2001/009 , Y10T307/406
摘要： Systems and methods provide for a power management unit and its operation. The power management unit includes: a step-down power converter configured to receive a first voltage and output a second voltage, wherein the second voltage is less than the first voltage and at least one step-up power converter configured to receive the second voltage and output a third voltage, wherein the third voltage is greater than the second voltage. It also includes an inductive element connected to the step-down power converter and the at least one step-up power converter and configured to store energy and selectively release the stored energy, wherein the inductive element is time shared by both the step-down power converter and the at least one step-up power converter; and a finite state machine configured to control the time sharing of the inductive element.
摘要翻译： 系统和方法提供电源管理单元及其操作。 电源管理单元包括：降压功率转换器，被配置为接收第一电压并输出第二电压，其中所述第二电压小于所述第一电压，以及至少一个升压功率转换器，被配置为接收所述第二电压，以及 输出第三电压，其中第三电压大于第二电压。 它还包括连接到降压功率转换器和至少一个升压功率转换器的电感元件，并被配置为存储能量并选择性地释放存储的能量，其中电感元件由降压功率 转换器和至少一个升压功率转换器; 以及配置成控制电感元件的时间共享的有限状态机。
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公开(公告)号：EP2513657A1
公开(公告)日：2012-10-24
申请号：EP10798028.6
申请日：2010-12-10
申请人： ST-Ericsson SA
CPC分类号： G01R31/024 , G01R31/2635 , H05B33/0893
摘要： The present invention discloses a current controlling circuit wherein the circuit (200) comprises a DC power source (202), an inductor (204), a N-channel Metal Oxide Semiconductor (NMOS) (206), one or more LEDs (208) connected in series, a first resistor (Rsense) and a switching arrangement (210). The positive terminal of the DC power source (202) is connected to the inductor (204) in series. The series of LED (208) is connected in series with the inductor (204) and the first resistor (Rsense). According to an embodiment the switching arrangement (210) comprises a second resistor (Rslt), a first switch (212) and a second switch (214). The second resistor (Rslt) is connected in series with the second switch (214) and connected in parallel with the first switch (212). The switching arrangement (210) is connected in series with the first resistor (Rsense) and the negative terminal of the DC supply (202).
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