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1. 发明授权

US06356749B1 Automatic adapt circuit for circumventing demodulator transients in radio receiver 有权
标题翻译：自动适应电路，用于避免无线电接收机中的解调器瞬变
公开(公告)号：US06356749B1
公开(公告)日：2002-03-12
申请号：US09344192
申请日：1999-06-24
申请人： Norman T. Rollins , Man Wa Wong , Steven P. Hoggarth
发明人： Norman T. Rollins , Man Wa Wong , Steven P. Hoggarth
IPC分类号： H04B110
CPC分类号： H04B1/28
摘要： An auto-adapt circuit (200) for altering radio receiver parameters due to demodulator transients and preventing the loss of received information. The auto-adapt circuit includes a detector circuit (215) connected to the output of a receiver demodulator (203) and a switch (219) controlled by the detector circuit (215). The detector circuit (215) detects a transient voltage at an upper threshold limit or at a lower threshold limit such that a transient at an output of the receiver demodulator will actuate the at least one switch for varying demodulator coupling parameters of the radio receiver.
摘要翻译：一种用于由于解调器瞬变而改变无线电接收机参数并防止接收信息丢失的自适应电路（200）。自适应电路包括连接到接收机解调器（203）的输出的检测器电路（215）和由检测器电路（215）控制的开关（219）。检测器电路（215）检测在上限阈值或较低阈值极限处的瞬态电压，使得接收机解调器的输出处的瞬变将致动至少一个开关以改变无线电接收机的解调器耦合参数。

2. 发明授权

US07120402B2 Method and apparatus for a high performance and high dynamic range baseband power control system 有权
标题翻译：用于高性能和高动态范围的基带功率控制系统的方法和装置
公开(公告)号：US07120402B2
公开(公告)日：2006-10-10
申请号：US10790516
申请日：2004-03-01
申请人： Sumit A. Talwalkar , Mahibur Rahman , Steven P. Hoggarth
发明人： Sumit A. Talwalkar , Mahibur Rahman , Steven P. Hoggarth
IPC分类号： H01Q11/12
CPC分类号： H04W52/52 , H04B2001/0416
摘要： A method and system controls transmit power by combining the advantages of digital attenuation and analog baseband step attenuators by calibration to overcome the limitations of analog step attenuators. The calibration technique uses highly accurate digital attenuators to determine the actual sizes of the analog steps as analog step attenuator is stepped through a range of attenuation levels. A method of calibration accurately measures attenuation steps comparison to a digital attenuator so that the attenuation actually realized by the analog step attenuator is accurately known. Therefore, the difference between the attenuation realized by the analog step attenuator and the desired attenuation is accurately known. The difference is realized in the digital attenuator and the attenuation resulting from the composite of the digital and analog step attenuator can very accurately realize the requested attenuation.
摘要翻译：一种方法和系统通过校准数字衰减和模拟基带阶跃衰减器的优点来控制发射功率，以克服模拟步进衰减器的局限性。校准技术使用高精度的数字衰减器来确定模拟步进的实际尺寸，因为模拟步进衰减器通过一定范围的衰减水平。校准方法精确地测量与数字衰减器的衰减步骤比较，使得由模拟步进衰减器实际实现的衰减被精确地知道。因此，模拟步进衰减器实现的衰减与所需的衰减之间的差异是准确的。在数字衰减器中实现了差异，并且由数字和模拟步进衰减器的复合产生的衰减可以非常准确地实现所要求的衰减。

3. 发明授权

US07355456B2 Wide linear range peak detector 有权
标题翻译：宽线性范围峰值检测器
公开(公告)号：US07355456B2
公开(公告)日：2008-04-08
申请号：US11199493
申请日：2005-08-08
申请人： Gary A. Kurtzman , Steven P. Hoggarth
发明人： Gary A. Kurtzman , Steven P. Hoggarth
IPC分类号： G01R19/00
CPC分类号： G01R19/04
摘要： A wide linear range peak detector including first and second peak detectors and a compensation circuit. The first peak detector receives an input signal and has an output providing a first peak signal approximation which approximates a peak level of the input signal. The first peak signal approximation includes a non-linear portion which is a function of the peak level of the input signal. The second peak detector also receives the input signal and has an output providing a second peak signal approximation. The compensation circuit uses the second peak signal approximation to provide a compensation signal which compensates the non-linear portion of the first peak signal approximation. In particular, the second peak signal is used to generate the compensation signal to approximate and cancel the non-linear portion.
摘要翻译：宽线性范围峰值检测器，包括第一和第二峰值检测器和补偿电路。第一峰值检测器接收输入信号并具有提供近似输入信号的峰值电平的第一峰值信号近似的输出。第一峰值信号近似包括作为输入信号的峰值电平的函数的非线性部分。第二峰值检测器还接收输入信号并具有提供第二峰值信号近似的输出。补偿电路使用第二峰值信号近似来提供补偿第一峰值信号近似的非线性部分的补偿信号。特别地，第二峰值信号用于产生补偿信号以近似和消除非线性部分。

4. 发明授权

US07720448B2 Signal generation power management control system for portable communications device and method of using same 有权
标题翻译：用于便携式通信设备的信号发生电力管理控制系统及其使用方法
公开(公告)号：US07720448B2
公开(公告)日：2010-05-18
申请号：US10748735
申请日：2003-12-30
申请人： Raul Salvi , Cesar Carralero , Steven P. Hoggarth
发明人： Raul Salvi , Cesar Carralero , Steven P. Hoggarth
IPC分类号： H04B1/04
CPC分类号： H03G3/30 , G11B20/10
摘要： A signal generation power management control system (100) for use in a portable communications device includes a digital signal processor (DSP) (101) for processing a digital source input and providing a digital processed bit stream A digital-to-analog converter (DAC) (103) is used for converting the digital processed bit stream to provide an analog signal. A power management controller (115) within the DSP (101) is then used for interpreting control parameters of signal processing components used within the portable communications device and dynamically adjusting the bias current of these components based on minimal signal requirements of the analog signal.
摘要翻译：一种用于便携式通信设备的信号发生功率管理控制系统（100）包括用于处理数字源输入并提供数字处理比特流A的数字信号处理器（DSP）（101）数模转换器）（103）用于转换数字处理比特流以提供模拟信号。然后，DSP（101）内的电源管理控制器（115）用于解释在便携式通信设备内使用的信号处理组件的控制参数，并且基于模拟信号的最小信号要求来动态调整这些组件的偏置电流。

5. 发明授权

US08583072B1 Multiphase local oscillator generator circuit for a broadband tuner device 有权
标题翻译：用于宽带调谐器设备的多相本地振荡器发生器电路
公开(公告)号：US08583072B1
公开(公告)日：2013-11-12
申请号：US13324878
申请日：2011-12-13
申请人： Alexandru A. Ciubotaru , Jerry T. Bolton, Jr. , Steven P. Hoggarth
发明人： Alexandru A. Ciubotaru , Jerry T. Bolton, Jr. , Steven P. Hoggarth
IPC分类号： H04B1/16
CPC分类号： H03L7/0995 , H03J1/0008 , H03K3/0322
摘要： Embodiments of integrated circuits for use in a broadband tuner are described. In one embodiment, an integrated circuit includes a clock buffer configured to buffer a received clock signal and generate a buffered clock signal. Additionally, the integrated circuit includes a multiphase local oscillator core coupled to the clock buffer and configured to generate a plurality of oscillator signals in response to the buffered clock signal, each of the plurality of oscillator signals being mutually phase shifted. The integrated circuit may also include a plurality of output buffers, each configured to receive one of the plurality of oscillator signals and to produce an output signal suitable for use in a broadband tuner circuit in response to the one of the plurality of oscillator signals.
摘要翻译：描述了用于宽带调谐器的集成电路的实施例。在一个实施例中，集成电路包括被配置为缓冲接收到的时钟信号并产生缓冲的时钟信号的时钟缓冲器。此外，集成电路包括耦合到时钟缓冲器的多相本地振荡器芯，并且被配置为响应于所缓冲的时钟信号产生多个振荡器信号，所述多个振荡器信号中的每一个相互相移。集成电路还可以包括多个输出缓冲器，每个输出缓冲器被配置为接收多个振荡器信号中的一个并且响应于多个振荡器信号之一产生适合于在宽带调谐器电路中使用的输出信号。

6. 发明授权

US06677876B1 Differential sigma-delta DAC with dynamic spectral shaping 有权
标题翻译：具有动态频谱整形的差分Σ-ΔDAC
公开(公告)号：US06677876B1
公开(公告)日：2004-01-13
申请号：US10228580
申请日：2002-08-27
申请人： Steven P. Hoggarth , Edward Diaz , Raul Salvi
发明人： Steven P. Hoggarth , Edward Diaz , Raul Salvi
IPC分类号： H03M300
CPC分类号： H03M7/3015 , H03M1/0673 , H03M3/502 , H03M7/3026 , H03M7/3033
摘要： A sigma-delta DAC circuit 10 includes a sigma-delta modulator 12 for producing and outputting an n-bit digital signal representative of an input analog signal, wherein n is a positive integer greater than 1, and is preferably equal to 4, 5 or 6. A differential n-bit DAC 30 is for converting a 2n−1-bit digital signal and a 2n−1-bit inverted digital signal processed and output by a bit shifter 24 and a differential decoder 18 to a differential analog signal. The sigma-delta modulator has a movable zero for enabling dynamic spectral shaping of the differential analog signal.
摘要翻译： Σ-ΔDAC电路10包括用于产生和输出表示输入模拟信号的n位数字信号的Σ-Δ调制器12，其中n是大于1的正整数，并且优选地等于4,5或者差分n位DAC30用于将由比特移位器24和差分解码器18处理和输出的2 位数字信号和2 位反相数字信号转换为差分模拟信号。 Σ-Δ调制器具有可移动的零点，用于实现差分模拟信号的动态频谱整形。

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