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31. 发明申请

US20180014123A1 MICROPHONE ASSEMBLY WITH DIGITAL FEEDBACK LOOP 审中-公开
公开(公告)号：US20180014123A1
公开(公告)日：2018-01-11
申请号：US15202404
申请日：2016-07-05
申请人： Knowles Electronics, LLC
发明人： Mohammad SHAJAAN , Claus Erdmann FÜRST , Per Flemming HØVESTEN , Kim Spetzler BERTHELSEN , Henrik THOMSEN
IPC分类号： H04R3/02
CPC分类号： H04R3/02 , H03F3/34 , H03F3/70 , H03G3/30 , H03M1/181 , H03M3/464 , H03M3/48 , H03M3/49 , H04R1/04 , H04R3/04
摘要： A microphone assembly includes a transducer element and a processing circuit. The processing circuit includes an analog-to-digital converter (ADC) configured to receive, sample and quantize a microphone signal generated by the transducer element to generate a corresponding digital microphone signal. The processing circuit includes a feedback path including a digital loop filter configured to receive and filter the digital microphone signal to provide a first digital feedback signal and a digital-to-analog converter (DAC) configured to convert the first digital feedback signal into a corresponding analog feedback signal. The processing circuit additionally includes a summing node at the transducer output configured to combine the microphone signal and the analog feedback signal.

32. 发明授权

US09484150B2 Multi-mode power amplifying circuit, and multi-mode wireless transmission module and method thereof 有权
标题翻译：多模功率放大电路及多模无线传输模块及其方法
公开(公告)号：US09484150B2
公开(公告)日：2016-11-01
申请号：US14045213
申请日：2013-10-03
申请人： REALTEK SEMICONDUCTOR CORP.
发明人： Po-Chih Wang , Ya-Wen Yang
IPC分类号： H01F38/14 , H04B1/04 , H03F1/02 , H03F3/34
CPC分类号： H01F38/14 , H03F1/0277 , H03F3/24 , H03F3/34 , H04B1/0458
摘要： A multi-mode power amplifying circuit, and a multi-mode wireless transmission module and method thereof are provided. The multi-mode wireless transmission module includes the multi-mode power amplifying circuit and an antenna. In the multi-mode power amplifying circuit and the antenna, a first power amplifier is electrically connected between a signal input end and a first impedance matching circuit, and an output end of the first impedance matching circuit is electrically connected to the antenna. A second power amplifier is electrically connected to the signal input end, and a second impedance matching circuit is electrically connected between the second power amplifier and the first impedance matching circuit. A switching circuit is electrically connected to an input end of the second impedance matching circuit. The switching circuit switches on-off corresponding to an operation of the first power amplifier and an operation of the second power amplifier.
摘要翻译：提供了一种多模式功率放大电路以及多模式无线传输模块及其方法。多模无线传输模块包括多模功率放大电路和天线。在多模式功率放大电路和天线中，第一功率放大器电连接在信号输入端和第一阻抗匹配电路之间，第一阻抗匹配电路的输出端电连接到天线。第二功率放大器电连接到信号输入端，并且第二阻抗匹配电路电连接在第二功率放大器和第一阻抗匹配电路之间。开关电路电连接到第二阻抗匹配电路的输入端。开关电路对应于第一功率放大器的操作和第二功率放大器的操作而导通 - 断开。

33. 发明申请

US20090129446A1 METHOD AND APPARATUS FOR GENERATING PHASE SHIFTED LOCAL OSCILLATOR SIGNALS FOR A FEEDBACK LOOP ON A TRANSMITTER 有权
标题翻译：用于在变送器中产生反相环路的相位偏移的本地振荡器信号的方法和装置
公开(公告)号：US20090129446A1
公开(公告)日：2009-05-21
申请号：US11941281
申请日：2007-11-16
申请人： Jeffrey B. Wilhite , Paul H. Gailus
发明人： Jeffrey B. Wilhite , Paul H. Gailus
IPC分类号： H04B1/06
CPC分类号： H03F3/24 , H03F1/34 , H03F3/34 , H03F2200/438 , H03F2200/451 , H03F2200/57 , H04B2001/0433
摘要： A transmitter is provided with a local oscillator (LO) processing unit to maintain stability in the transmitter's feedback loop. The LO processing unit includes at least one delay locked loop (DLL) and a programmable divider to generate phase shifted LO signals for adjusting a loop phase of the feedback loop in the transmitter. The generated phase shifted LO signals are of both a coarse and fine phase shifted nature. The adjustability and control of the coarse and fine phase shifting of the LO signals maintains linearity in the transmitter feedback loop.
摘要翻译：发射机设有本地振荡器（LO）处理单元，以保持发射机反馈环路的稳定性。 LO处理单元包括至少一个延迟锁定环（DLL）和可编程分频器，以产生相移的LO信号，用于调整发射机中的反馈回路的环路相位。产生的相移的LO信号既具有粗调和精细的相移特性。 LO信号的粗调和精细相移的可调性和控制在发射机反馈环路中保持线性。

34. 发明申请

US20070135156A1 Level shifter and methods for use therewith 失效
标题翻译：电平移位器及其使用方法
公开(公告)号：US20070135156A1
公开(公告)日：2007-06-14
申请号：US11304312
申请日：2005-12-14
申请人： Matthew Felder
发明人： Matthew Felder
IPC分类号： H04M1/00
CPC分类号： H03F3/34
摘要： A level shifter includes a first level shift module for producing a shifted signal by adjusting a direct current (DC) level of an input signal by a first bias voltage having a first polarity. A second level shift module produces an output signal by adjusting a DC level of the shifted signal by a second bias voltage having a second polarity. The first polarity is opposite to the second polarity and the sum of the first bias voltage and the second bias voltage is a non-zero voltage.
摘要翻译：电平移位器包括第一电平移位模块，用于通过利用具有第一极性的第一偏置电压来调节输入信号的直流电平（DC）来产生移位信号。第二电平移位模块通过利用具有第二极性的第二偏置电压来调整移位信号的直流电平来产生输出信号。第一极性与第二极性相反，并且第一偏置电压和第二偏置电压的和是非零电压。

35. 发明授权

US5680074A Tube amplifier having specific configuration with four tubes 失效
标题翻译：管放大器具有特定配置，四个管
公开(公告)号：US5680074A
公开(公告)日：1997-10-21
申请号：US436542
申请日：1995-05-08
申请人： Fujio Yamasita
发明人： Fujio Yamasita
IPC分类号： H03F1/33 , H03F3/181 , H03F3/34 , H03F3/52
CPC分类号： H03F3/181 , H03F3/34
摘要： There is provided a tube amplifier comprising a first vacuum tube K3 having a plate applied with a positive voltage and a cathode applied with a negative voltage by a first resistor, a second vacuum tube K4 having a grid connected to the cathode of the first vacuum tube and a cathode or a heater applied with a voltage close to a potential of zero in relation to a plate voltage, and an output transformer TF1 having a first coil and a second coil which is connected to a loud-speaker, said first coil having a terminal connected to the plate of the second vacuum tube and another terminal applied with a positive voltage. Also, timer means is used to optimally maintain the grid voltage of the second vacuum tube when the power source is turned on, and the plate voltage of another vacuum tube K1 provided in a preceding stage of the first vacuum tube is controlled to maintain the negative voltage applied to the grid of the second vacuum tube at a desired value.
摘要翻译：提供了一种管放大器，其包括具有施加正电压的板的第一真空管K3和通过第一电阻施加负电压的阴极，具有连接到第一真空管的阴极的栅极的第二真空管K4 以及施加有相对于板电压接近零电压的阴极或加热器，以及具有连接到扬声器的第一线圈和第二线圈的输出变压器TF1，所述第一线圈具有端子连接到第二真空管的板，另一个端子施加正电压。此外，当电源接通时，定时器装置用于最佳地维持第二真空管的电网电压，并且控制设置在第一真空管的前一级中的另一个真空管K1的板电压以维持负施加到第二真空管的栅极上的电压处于期望值。

36. 发明授权

US4247825A Transistor amplifier 失效
标题翻译：晶体管放大器
公开(公告)号：US4247825A
公开(公告)日：1981-01-27
申请号：US17983
申请日：1979-03-07
申请人： Hermann Berger
发明人： Hermann Berger
IPC分类号： H03F3/343 , H03F1/32 , H03F3/34 , H03F3/347 , H03F3/45
CPC分类号： H03F3/4521 , H03F1/3211 , H03F3/34 , H03F3/45085 , H03F2203/45362 , H03F2203/45366 , H03F2203/45458 , H03F2203/45508 , H03F2203/45596 , H03F2203/45621 , H03F2203/45702 , H03F2203/45712
摘要： A transistor amplifier comprising two transistor pairs, connected in parallel at their bases and collectors and with interconnected emitter electrodes of one transistor pair receiving an essentially constant direct current and the interconnected emitter electrodes of the other transistor pair an essentially constant direct voltage. The amplifier extends the upper range of input voltages at which the difference of the collector currents of these transistor pairs varies as a linear function of the voltage between the bases. As a result, larger input voltages can now be amplified with low distortion.
摘要翻译：晶体管放大器包括两个晶体管对，在它们的基极和集电极处并联连接，并且具有一个晶体管对的互连的发射极接收基本上恒定的直流电流，而另一个晶体管对的互连的发射极电极基本上是恒定的直流电压。放大器扩展了输入电压的上限范围，在该范围内，这些晶体管对的集电极电流的差值作为基极之间的电压的线性函数而变化。因此，现在可以以较低的失真放大较大的输入电压。

37. 发明授权

US4169996A Operational amplifier with slew recovery enhancement 失效
标题翻译：具有SLEW恢复增强功能的操作放大器
公开(公告)号：US4169996A
公开(公告)日：1979-10-02
申请号：US909095
申请日：1978-05-24
申请人： George A. Cavigelli
发明人： George A. Cavigelli
IPC分类号： G01R13/22 , H03F1/48 , H03F3/34 , H03F1/36
CPC分类号： H03F1/486 , G01R13/22 , H03F3/34
摘要： Improved slew recovery in a composite driving amplifier for driving a substantially reactive load including a feedback loop to the operational amplifier from the load for regulating the output of the amplifier, the composite amplifier has a predetermined resistance R1 in the feedback loop and includes a second feedback loop having a predetermined resistance R2. The second feedback loop extends from the output of the operational amplifier to the negative input and is substantially parallel with the first-mentioned feedback loop. To maximize the recovery of the amplifier from a slew condition, the relationship of R1-R2 should be as follows: ##EQU1## wherein: V.sub.o is the output voltage in the amplifier.Slope, is the slope of the load voltage curve during the overload condition, andDelay represents the period of time it takes the overload operational amplifier to respond to a feedback signal at a given overload condition.

38. 发明授权

US3383612A Integrated circuit biasing arrangements 失效
标题翻译：集成电路偏置装置
公开(公告)号：US3383612A
公开(公告)日：1968-05-14
申请号：US51030765
申请日：1965-11-29
申请人： RCA CORP
发明人： HARWOOD LEOPOLD A
IPC分类号： G05F1/56 , H03F1/30 , H03F3/34 , H03F3/347 , H03F3/45 , H03G3/30 , H03K19/018
CPC分类号： H03K19/01806 , G05F1/562 , H03F1/302 , H03F3/34 , H03F3/347 , H03F3/45479 , H03G3/3052

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