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    • 1. 发明授权
    • Gated counter analog-to-digital converter with error correction
    • 具有纠错功能的门控模数转换器
    • US06452520B1
    • 2002-09-17
    • US09725620
    • 2000-11-29
    • Andrew D. SmithQuentin P. HerrMark W. JohnsonBruce J. Dalrymple
    • Andrew D. SmithQuentin P. HerrMark W. JohnsonBruce J. Dalrymple
    • H03M100
    • H03M1/0602H03M1/60
    • A superconducting A/D converter (10) has an error correction system (70) for eliminating non-linearities in a primary quantizer (30). The converter (10) includes a primary quantizer (30), a primary SFQ counter (50), and the error correction system (70). The primary quantizer (30) generates primary SFQ pulses based on an average voltage of an analog input signal. The primary SFQ counter (50) converts the primary SFQ pulses into a digital output signal based on a frequency of the primary SFQ pulses. The error correction system (70) corrects the digital output signal based on the analog input signal and the primary SFQ pulses. Using the primary SFQ pulses to correct the digital output signal allows the converter (10) to take into account the non-linearities of the primary quantizer (30).
    • 超导A / D转换器(10)具有用于消除主量化器(30)中的非线性的误差校正系统(70)。 转换器(10)包括主量化器(30),主SFQ计数器(50)和纠错系统(70)。 主量化器(30)基于模拟输入信号的平均电压产生初始SFQ脉冲。 主SFQ计数器(50)基于主SFQ脉冲的频率将初级SFQ脉冲转换成数字输出信号。 误差校正系统(70)根据模拟输入信号和初级SFQ脉冲校正数字输出信号。 使用主SFQ脉冲来校正数字输出信号允许转换器(10)考虑主量化器(30)的非线性。
    • 8. 发明授权
    • Architecture for multi-carrier receiver
    • 多载波接收机的架构
    • US06798848B1
    • 2004-09-28
    • US09605947
    • 2000-06-28
    • Shimen K. ClaxtonBert K. OyamaMark KintisAndrew D. SmithCraig R. TalbottDonald R. MartinWilliam M. SkonesRonald P. SmithVincent C. Moretti
    • Shimen K. ClaxtonBert K. OyamaMark KintisAndrew D. SmithCraig R. TalbottDonald R. MartinWilliam M. SkonesRonald P. SmithVincent C. Moretti
    • H03K900
    • H03F3/45085H03D7/163H03F3/1935H03F2200/198H03F2200/294H03F2200/331H03F2200/372H03F2203/45326H04B1/0003H04B1/0007H04B1/0028H04B1/0032H04B1/28H04L5/06
    • A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels. In one embodiment, the frequency down-conversion is performed in a single down-conversion process, and the ADC (20) employs delta-sigma processing to provide digital conversion over the complete frequency band. In an alternate embodiment, the frequency down-conversion is performed in a double down-conversion process so that a less complex ADC (62) can be used.
    • 一种用于无线电信系统的接收机(10),其提供接收信号的相对宽带信号处理,而不增加信号失真,使得可以同时处理多个接收信号。 接收器(10)包括专用LNA(16),降频转换器(18)和ADC(20),以在维持接收机性能的同时执行宽带信号处理。 降频转换器(18)采用合适的混频器(28),BPA(32),衰减器(34)和变压器(36),其被调谐以在期望的宽带上提供期望的频率下变频和幅度控制。 根据ADC的特定性能标准(20)选择下转换器器件。 在接收器(10)中包括一个专门的数字信道化器(22),其接收来自ADC(20)的数字信号,并将信号分离成多个信道。 在一个实施例中,在单个下变频处理中执行降频转换,并且ADC(20)采用delta-sigma处理来在整个频带上提供数字转换。 在替代实施例中,在双下变频过程中执行降频转换,使得可以使用较不复杂的ADC(62)。
    • 9. 发明授权
    • Multi-carrier receiver for a wireless telecommunication system
    • 用于无线电信系统的多载波接收机
    • US06631255B1
    • 2003-10-07
    • US09605481
    • 2000-06-28
    • Shimen K. ClaxtonBert K. OyamaBarry R. AllenMark KintisAndrew D. SmithCraig R. TalbottDavid J. BrunoneDonald R. MartinWilliam M. SkonesVincent C. Moretti
    • Shimen K. ClaxtonBert K. OyamaBarry R. AllenMark KintisAndrew D. SmithCraig R. TalbottDavid J. BrunoneDonald R. MartinWilliam M. SkonesVincent C. Moretti
    • H04B118
    • H04B1/0007H03D7/163H04B1/0003H04B1/0028H04B1/0032H04B1/28
    • A receiver (10) for a wireless telecommunications system that provides relatively wideband signal processing of received signals without increased signal distortion so that multiple received signals can be simultaneously processed. The receiver (10) includes a specialized LNA (16), frequency down-converter (18) and ADC (20) to perform the wideband signal processing while maintaining receiver performance. The frequency down-converter (18) employs a suitable mixer (28), BPA (32), attenuator (34), and transformer (36) that are tuned to provide the desired frequency down-conversion and amplitude control over the desired wideband. The down-converter devices are selected depending on the particular performance criteria of the ADC (20). A specialized digital channelizer (22) is included in the receiver (10) that receives the digital signal from the ADC (20), and separates the signals into the multiple channels. In one embodiment, the frequency down-conversion is performed in a single down-conversion process, and the ADC (20) employs delta-sigma processing to provide digital conversion over the complete frequency band. In an alternate embodiment, the frequency down-conversion is performed in a double down-conversion process so that a less complex ADC (62) can be used.
    • 一种用于无线电信系统的接收机(10),其提供接收信号的相对宽带信号处理,而不增加信号失真,使得可以同时处理多个接收信号。 接收器(10)包括专用LNA(16),降频转换器(18)和ADC(20),以在维持接收机性能的同时执行宽带信号处理。 降频转换器(18)采用合适的混频器(28),BPA(32),衰减器(34)和变压器(36),其被调谐以在期望的宽带上提供期望的频率下变频和幅度控制。 根据ADC的特定性能标准(20)选择下转换器器件。 在接收器(10)中包括一个专门的数字信道化器(22),其接收来自ADC(20)的数字信号,并将信号分离成多个信道。 在一个实施例中,在单个下变频处理中执行降频转换,并且ADC(20)采用delta-sigma处理来在整个频带上提供数字转换。 在替代实施例中,在双下变频过程中执行降频转换,使得可以使用较不复杂的ADC(62)。