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71. 发明授权

US06985027B2 Voltage step down circuit with reduced leakage current 失效
标题翻译：具有降低漏电流的降压电路
公开(公告)号：US06985027B2
公开(公告)日：2006-01-10
申请号：US10684438
申请日：2003-10-15
申请人： Tomoaki Yabe
发明人： Tomoaki Yabe
IPC分类号： G05F1/10
CPC分类号： G05F1/565 , H03F1/305
摘要： A semiconductor integrated circuit comprises a power supply voltage step down circuit and a MOS circuit group. The power supply voltage step down circuit is supplied with a power supply voltage and controlled by a standby control signal indicating an operating state or a standby state. The power supply voltage step down circuit outputs a first internal power supply voltage lower than the power supply voltage to an internal power supply line when the standby control signal indicates the operating state, and outputs a second internal power supply voltage lower than the first internal power supply voltage to the internal power supply line when the standby control signal indicates the standby state. The MOS circuit group including one or more MOS transistors which are supplied with the first or second internal power supply voltage from the internal power supply line to operate.
摘要翻译：半导体集成电路包括电源电压降压电路和MOS电路组。电源电压降压电路被供给电源电压并由指示操作状态或待机状态的待机控制信号控制。当待机控制信号指示运行状态时，电源电压降压电路将低于电源电压的第一内部电源电压输出到内部电源线，并且输出低于第一内部电力的第二内部电源电压当待机控制信号指示待机状态时，向内部电源线供电。 MOS电路组包括一个或多个MOS晶体管，其被提供有来自内部电源线的第一或第二内部电源电压以进行操作。

72. 发明授权

US06972616B2 Low-noise, fast-settling bias circuit and method 有权
标题翻译：低噪声，快速稳定的偏置电路和方法
公开(公告)号：US06972616B2
公开(公告)日：2005-12-06
申请号：US10823711
申请日：2004-04-14
申请人： Stephen Wu
发明人： Stephen Wu
IPC分类号： H03B1/00 , H03F1/26 , H03F1/30 , H03F3/14
CPC分类号： H03F1/305 , H03F1/26
摘要： A low-noise, fast-settling bias circuit includes a first and a second low pass filter, such as RC filters. The second filter initially shorts out a resistor of the first filter with a switch (set to low impedance) in parallel. Accordingly, a capacitor of the first filter quickly charges up to the same voltage as the input bias voltage. As the second filter charges up, the switch slowly shuts off (high impedance). By this time, since the capacitor of the first filter has charged to the same voltage as the bias voltage, a large RC formed by the resistor of the first filter and the capacitor of the first filter is available to provide filtering for the desired bias current.
摘要翻译：低噪声，快速稳定的偏置电路包括第一和第二低通滤波器，例如RC滤波器。第二个滤波器首先将开关（设置为低阻抗）并联的第一个滤波器的电阻短路。因此，第一滤波器的电容器快速充电至与输入偏置电压相同的电压。当第二个滤波器充电时，开关缓慢关闭（高阻抗）。此时，由于第一滤波器的电容器被充电到与偏置电压相同的电压，所以由第一滤波器的电阻器和第一滤波器的电容器形成的大的RC可用于为期望的偏置电流提供滤波。

73. 发明申请

US20050233713A1 Method and system for compensating for phase variations caused by transmitter activation 失效
标题翻译：用于补偿由发射器激活引起的相位变化的方法和系统
公开(公告)号：US20050233713A1
公开(公告)日：2005-10-20
申请号：US10863977
申请日：2004-06-09
申请人： Leonid Kazakevich , Tanbir Haque , Alpaslan Demir , Robert Troiano
发明人： Leonid Kazakevich , Tanbir Haque , Alpaslan Demir , Robert Troiano
IPC分类号： H03C1/62 , H03F1/02 , H03F1/06 , H03F1/14 , H03F1/30 , H03F3/24 , H04B1/04
CPC分类号： H03F3/24 , H03F1/0205 , H03F1/0211 , H03F1/14 , H03F1/305 , H03F2200/336
摘要： A method and apparatus that reduces the amount of constellation rotation due to power amplifier (PA) insertion phase variation during activation (i.e., turn on) of a transmitter. This is accomplished by applying an instantaneous phase rotation during the transmitter turn on at digital baseband to counteract and minimize unwanted phase variations.
摘要翻译：一种减少由于功率放大器（PA）在发射机的激活（即导通）期间插入相位变化引起的星座旋转量的方法和装置。这是通过在发射机在数字基带处接通时施加瞬时相位旋转来实现的，以抵消并最小化不期望的相位变化。

74. 发明申请

US20050231274A1 LOW-NOISE, FAST-SETTLING BIAS CIRCUIT AND METHOD 有权
标题翻译：低噪声，快速稳定偏置电路和方法
公开(公告)号：US20050231274A1
公开(公告)日：2005-10-20
申请号：US10823711
申请日：2004-04-14
申请人： Stephen Wu
发明人： Stephen Wu
IPC分类号： H03B1/00 , H03F1/26 , H03F1/30 , H03F3/14
CPC分类号： H03F1/305 , H03F1/26
摘要： A low-noise, fast-settling bias circuit includes a first and a second low pass filter, such as RC filters. The second filter initially shorts out a resistor of the first filter with a switch (set to low impedance) in parallel. Accordingly, a capacitor of the first filter quickly charges up to the same voltage as the input bias voltage. As the second filter charges up, the switch slowly shuts off (high impedance). By this time, since the capacitor of the first filter has charged to the same voltage as the bias voltage, a large RC formed by the resistor of the first filter and the capacitor of the first filter is available to provide filtering for the desired bias current.
摘要翻译：低噪声，快速稳定的偏置电路包括第一和第二低通滤波器，例如RC滤波器。第二个滤波器首先将开关（设置为低阻抗）并联的第一个滤波器的电阻短路。因此，第一滤波器的电容器快速充电至与输入偏置电压相同的电压。当第二个滤波器充电时，开关缓慢关闭（高阻抗）。此时，由于第一滤波器的电容器被充电到与偏置电压相同的电压，所以由第一滤波器的电阻器和第一滤波器的电容器形成的大的RC可用于为期望的偏置电流提供滤波。

75. 发明申请

US20050195991A1 Method and system for reducing pop noise of a sound broadcasting instrument 有权
标题翻译：用于减少声音广播乐器的流行噪音的方法和系统
公开(公告)号：US20050195991A1
公开(公告)日：2005-09-08
申请号：US10862917
申请日：2004-06-07
申请人： Yuhe Wang , Peter White , Daniel Ho , Frank Nguyen , Chin-Chi Chang , Jeetin Rathore
发明人： Yuhe Wang , Peter White , Daniel Ho , Frank Nguyen , Chin-Chi Chang , Jeetin Rathore
IPC分类号： H02B1/00 , H04B15/00
CPC分类号： H03F1/305 , H03F3/187 , H03G3/002 , H03M1/0881 , H03M1/66
摘要： A method and system are disclosed for controlling pop noises in a sound broadcasting system. After controllably connecting an output of a drive amplifier to a first predetermined low voltage level through a first switch, a first portion of an operation control data set is input to a digital-to-analog converter (DAC) circuit for driving an output thereof to a second predetermined low voltage level, and a second portion of the operation control data set is also input to the DAC circuit and further to the drive amplifier to bring the output of the drive amplifier to a common mode voltage level over a predetermined rise-up time period for controlling the pop noises.
摘要翻译：公开了一种用于控制声音广播系统中的弹奏噪声的方法和系统。在通过第一开关可控地将驱动放大器的输出连接到第一预定低电压电平之后，操作控制数据组的第一部分被输入到数模转换器（DAC）电路，用于驱动其输出到第二预定低电压电平和第二部分操作控制数据组也被输入到DAC电路，并进一步输入到驱动放大器，以使驱动放大器的输出达到预定上升沿的共模电压电平控制流行音色的时间段。

76. 发明申请

US20050151589A1 Amplifier circuit for capacitive transducers 有权
标题翻译：放大电路用于电容式换能器
公开(公告)号：US20050151589A1
公开(公告)日：2005-07-14
申请号：US11032806
申请日：2005-01-11
申请人： Carsten Fallesen
发明人： Carsten Fallesen
IPC分类号： H03F1/26 , H03F1/30 , H03F3/181 , H03F3/187 , H03F3/45 , H04R25/00
CPC分类号： H03F1/305 , H03F1/30 , H03F1/301 , H03F3/187
摘要： An amplifier circuit for capacitive transducers, such as miniature electret or condenser microphones, wherein the amplifier circuit comprises bias control means adapted to improve settling of the amplifier circuit. Another aspect of the invention relates to a miniature condenser microphone and a monolithic integrated circuit comprising an amplifier circuit according to the present invention. The present invention provides amplifier circuits of improved performance by resolving traditionally conflicting requirements of maintaining a large input resistance of the amplifier circuit to optimize its noise performance and provide fast settling of the amplifier circuit.
摘要翻译：用于诸如微型驻极体或电容式麦克风的电容换能器的放大器电路，其中放大器电路包括适于改善放大器电路的稳定的偏置控制装置。本发明的另一方面涉及一种微型电容麦克风和包括根据本发明的放大器电路的单片集成电路。本发明通过解决保持放大器电路的大输入电阻以优化其噪声性能并提供放大器电路的快速稳定的传统冲突的要求来提供改进的性能的放大器电路。

77. 发明申请

US20050140432A1 Supplying a ramp voltage to an amplifier 有权
标题翻译：向放大器提供斜坡电压
公开(公告)号：US20050140432A1
公开(公告)日：2005-06-30
申请号：US10748200
申请日：2003-12-31
申请人： Vijayakumaran Nair , Kevin McCarville
发明人： Vijayakumaran Nair , Kevin McCarville
IPC分类号： H03F1/30 , H03G3/34 , H03F1/02
CPC分类号： H03F1/305 , H03G3/348
摘要： A common mode ramp voltage generator may be used in generating a ramp voltage for the amplifier and thereby eliminating or reducing pop noise.
摘要翻译：可以使用共模斜坡电压发生器来产生放大器的斜坡电压，从而消除或减少流行噪声。

78. 发明申请

US20050078841A1 Method and apparatus for resetting a buffer amplifier 审中-公开
标题翻译：用于复位缓冲放大器的方法和装置
公开(公告)号：US20050078841A1
公开(公告)日：2005-04-14
申请号：US10963130
申请日：2004-10-12
申请人： Steven Boor
发明人： Steven Boor
IPC分类号： H03F1/30 , H03F3/185 , H03F3/72 , H03G3/34 , H04R3/00
CPC分类号： H03F1/305 , H03F3/185 , H03F3/72 , H03F2203/7233 , H03G3/345
摘要： A reset circuit apparatus is used with a buffer amplifier circuit to provide a low impedance shunt for improving the settling characteristics of buffer amplifiers, particularly as used with miniature electret microphones. The reset circuit comprises a detector and is coupled to a switch. The switch is activated when the detector is triggered by predetermined operating conditions. The switch activates a ramp generator for providing a delay signal of a predetermined period to a shunt or reset device coupled to the input of a buffer amplifier. A method for performing the reset function is also discussed and described.
摘要翻译：复位电路装置与缓冲放大器电路一起使用以提供低阻抗分流器，以改善缓冲放大器的稳定特性，特别是与微型驻极体麦克风一样使用。复位电路包括检测器，并耦合到开关。当检测器由预定的操作条件触发时，开关被激活。开关激活斜坡发生器，用于向耦合到缓冲放大器的输入端的分流或复位装置提供预定周期的延迟信号。还讨论并描述了执行复位功能的方法。

79. 发明申请

US20040217808A1 Sound signal generating apparatus and method for reducing pop noise 有权
标题翻译：用于降低流行噪声的声音信号发生装置和方法
公开(公告)号：US20040217808A1
公开(公告)日：2004-11-04
申请号：US10672839
申请日：2003-09-26
申请人： Samsung Electronics Co., Ltd.
发明人： Il Joong Kim , Goog Chun Cho
IPC分类号： H03F003/38
CPC分类号： H03F3/2173 , H03F1/305 , H03F3/185 , H03F3/217 , H03F3/2171 , H03F3/38
摘要： A circuit for handling pulse width modulation (PWM) first signal and PWM second signal for outputting to an amplifier, the PWM first signal having one of a same phase and an opposite phase relationship with the PWM second signal, the circuit comprising a power detector for detecting power turn on to the amplifier and outputting a power on signal and detecting a power turn off to the amplifier and outputting a power off signal; a pulse generator having: a duty cycle generator for generating a first pulse signal corresponding to the PWM first signal and a second pulse signal corresponding to the PWM second signal, and a reduced-width generator for generating at least one of a reduced-width first pulse and a reduced-width second pulse; a controller for selecting one of the reduced-width first pulse and the reduced-width second pulse for outputting to the amplifier upon receipt of the power on signal and for selecting the first pulse signal and the second pulse signal for outputting to the amplifier thereafter; and a counter for counting the duration of the pulse width of the PWM first signal, the counter being activated upon detection of the power off signal and a select circuit for outputting an off select signal upon reaching a predetermined reduced-width time count to cause an output of one of a reduced-width PWM first signal and a reduced-width PWM second signal.
摘要翻译：一种用于处理脉宽调制（PWM）第一信号和PWM第二信号以用于输出到放大器的电路，所述PWM第一信号具有与所述PWM第二信号具有相同相位和相反相位关系的一个，所述电路包括用于检测电源接通放大器并输出通电信号，检测电源关闭放大器并输出断电信号; 脉冲发生器，其具有：占空比发生器，用于产生对应于PWM第一信号的第一脉冲信号和对应于PWM第二信号的第二脉冲信号;以及减小宽度发生器，用于产生缩小宽度第一脉冲和减小宽度的第二脉冲; 用于选择所述缩小宽度第一脉冲和所述缩小宽度第二脉冲之一的控制器，用于在接收到所述接通信号时输出到所述放大器，并且用于选择所述第一脉冲信号和所述第二脉冲信号以在之后输出到所述放大器; 以及计数器，用于计数PWM第一信号的脉冲宽度的持续时间，计数器在检测到电源关闭信号时被激活;以及选择电路，用于在达到预定的缩小宽度时间计数时输出关闭选择信号，输出减小宽度的PWM第一信号和减小宽度的PWM第二信号之一。

80. 发明申请

US20040175007A1 Semiconductor integrated circuit and amplifier for suppressing pop sound while minimizing voltage transition settling time 有权
标题翻译：用于抑制流行声音的半导体集成电路和放大器，同时最小化电压转换稳定时间
公开(公告)号：US20040175007A1
公开(公告)日：2004-09-09
申请号：US10763343
申请日：2004-01-23
发明人： Katsuhiko Aisu
IPC分类号： H03F021/00
CPC分类号： H03F1/305
摘要： A semiconductor integrated circuit includes a capacitor element which defines a prescribed decay time constant with one or more resistors, an MOS transistor connected to the capacitor element via its gate, and a constant current generating element which generates a constant current. The capacitor element is charged with the constant current so as to create a linearly changing voltage. The linearly changing voltage is applied to the gate so that the MOS transistor can accordingly output a smoothly changing current.
摘要翻译：半导体集成电路包括电容器元件，其通过一个或多个电阻器限定规定的衰减时间常数，经由其栅极连接到电容器元件的MOS晶体管和产生恒定电流的恒定电流产生元件。电容器元件用恒定电流充电，以产生线性变化的电压。线性变化的电压被施加到栅极，使得MOS晶体管可以相应地输出平滑变化的电流。

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