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1. 发明授权

US11216535B2 Probability mass redistributor device 有权
公开(公告)号：US11216535B2
公开(公告)日：2022-01-04
申请号：US16742835
申请日：2020-01-14
申请人： University College Cork—National University of Ireland, Cork
发明人： Yann Donnelly , Michael Peter Kennedy
IPC分类号： H03L7/197 , G06F17/18 , H03M3/00
摘要： The present invention provides a probability mass redistributor device comprising an input port and an output port. The device comprises a mapping block configured to perform a selected mapping function from a plurality of mapping functions on a random bitstream to generate an output signal having a desired probability mass function, at least one difference block, wherein the input to the at least one difference block comprises the output from the mapping block, and the output of the at least one difference block produces a modulation term, and wherein the output of each difference block is the difference between a previous value of the input signal to the block and a current value of the input signal to the block, and a summing block for summing a signal received by the input port and the modulation term to form an output signal.

2. 发明授权

US10560111B2 Nested cascaded mixed-radix digital delta-sigma modulator 有权
公开(公告)号：US10560111B2
公开(公告)日：2020-02-11
申请号：US16117361
申请日：2018-08-30
申请人： University College Cork—National University of Ireland, Cork
发明人： Hongjia Mo , Michael Peter Kennedy
IPC分类号： H03L7/197 , H03M7/36 , H03M3/00 , H03L7/093
摘要： A nested mixed-radix DDSM can guarantee zero systematic frequency error when used as a divider controller in a fractional-N frequency synthesizer is described. This disclosure presents a nested cascaded mixed-radix DDSM architecture which can also guarantee zero systematic frequency error. In addition, the disclosure allows one to use higher order auxiliary modulators and shaped dither signal to eliminate feedthrough spurs completely. By increasing the number of levels in the cascade, the moduli of the individual modulator stages can be reduced, thereby increasing the speed of the synthesizer.

3. 发明授权

US08816724B2 Nested digital delta-sigma modulator 有权
标题翻译：嵌套数字delta-sigma调制器
公开(公告)号：US08816724B2
公开(公告)日：2014-08-26
申请号：US13715529
申请日：2012-12-14
申请人： University College Cork—National University of Ireland, Cork
发明人： Michael Peter Kennedy
IPC分类号： H03B21/00
CPC分类号： H03B21/00 , H03L7/1974
摘要： Methods and systems are disclosed that provide a radio frequency synthesizer that generates precise frequencies over a large radio frequency range. The radio frequency synthesizer can provide a high resolution of frequency generation and still provide precise frequencies over a range of radio frequencies. The precision and resolution while maintaining a large operating range come from the ability of the frequency synthesizer to generate frequencies as a product of a plurality of moduli. For example, the frequency can be generated from a reference frequency using a first modulus and a second modulus. The plurality of modulo can be implemented using nested digital delta-sigma modulators in a fractional-N frequency synthesizer.
摘要翻译：公开了提供在大的射频范围内产生精确频率的射频合成器的方法和系统。无线电频率合成器可以提供高分辨率的频率产生，并且还能在无线电频率范围内提供精确的频率。维持较大工作范围的精度和分辨率来自于频率合成器产生频率作为多个模数乘积的能力。例如，可以使用第一模数和第二模数从参考频率产生频率。可以使用分数N频率合成器中的嵌套数字Δ-Σ调制器来实现多个模数。

4. 发明申请

US20200250256A1 PROBABILITY MASS REDISTRIBUTOR DEVICE 审中-公开
公开(公告)号：US20200250256A1
公开(公告)日：2020-08-06
申请号：US16742835
申请日：2020-01-14
申请人： University College Cork - National University of Ireland, Cork
发明人： Yann Donnelly , Michael Peter Kennedy
IPC分类号： G06F17/18 , H03L7/197
摘要： The present invention provides a probability mass redistributor device comprising an input port and an output port. The device comprises a mapping block configured to perform a selected mapping function from a plurality of mapping functions on a random bitstream to generate an output signal having a desired probability mass function, at least one difference block, wherein the input to the at least one difference block comprises the output from the mapping block, and the output of the at least one difference block produces a modulation term, and wherein the output of each difference block is the difference between a previous value of the input signal to the block and a current value of the input signal to the block, and a summing block for summing a signal received by the input port and the modulation term to form an output signal.

5. 发明授权

US10541707B2 Apparatus for reducing wandering spurs in a fractional-N frequency synthesizer 有权
$Apparatus for reducing wandering spurs in a fractional-N frequency synthesizer$
公开(公告)号：US10541707B2
公开(公告)日：2020-01-21
申请号：US16041648
申请日：2018-07-20
申请人： UNIVERSITY COLLEGE CORK—NATIONAL UNIVERSITY OF IRELAND, CORK
发明人： Hongjia Mo , Michael Peter Kennedy
IPC分类号： H03M3/00
摘要： The present invention provides a fractional-N frequency synthesizer comprising a divider controller comprising a multistage noise Shaping (MASH) digital delta-sigma modulator comprising L stages, wherein the Lth stage is configured to receive as an input a high amplitude dither signal.

6. 发明申请

US20190089368A1 APPARATUS FOR REDUCING WANDERING SPURS IN A FRACTIONAL-N FREQUENCY SYNTHESIZER 审中-公开
公开(公告)号：US20190089368A1
公开(公告)日：2019-03-21
申请号：US16041648
申请日：2018-07-20
申请人： UNIVERSITY COLLEGE CORK - NATIONAL UNIVERSITY OF IRELAND, CORK
发明人： Hongjia Mo , Michael Peter Kennedy
IPC分类号： H03M3/00
CPC分类号： H03M3/414 , H03M3/324 , H03M3/33 , H03M3/394 , H03M3/434
摘要： The present invention provides a fractional-N frequency synthesizer comprising a divider controller comprising a multistage noise Shaping (MASH) digital delta-sigma modulator comprising L stages, wherein the Lth stage is configured to receive as an input a high amplitude dither signal.

7. 发明申请

US20190068207A1 NESTED CASCADED MIXED-RADIX DIGITAL DELTA-SIGMA MODULATOR 审中-公开
公开(公告)号：US20190068207A1
公开(公告)日：2019-02-28
申请号：US16117361
申请日：2018-08-30
申请人： University College Cork - National University of Ireland, Cork
发明人： Hongjia Mo , Michael Peter Kennedy
IPC分类号： H03L7/197 , H03M3/00 , H03M7/30
CPC分类号： H03L7/1976 , H03L7/093 , H03M3/438 , H03M7/3017 , H03M7/3022
摘要： A nested mixed-radix DDSM can guarantee zero systematic frequency error when used as a divider controller in a fractional-N frequency synthesizer is described. This disclosure presents a nested cascaded mixed-radix DDSM architecture which can also guarantee zero systematic frequency error. In addition, the disclosure allows one to use higher order auxiliary modulators and shaped dither signal to eliminate feedthrough spurs completely. By increasing the number of levels in the cascade, the moduli of the individual modulator stages can be reduced, thereby increasing the speed of the synthesizer.

8. 发明申请

US20130154690A1 NESTED DIGITAL DELTA-SIGMA MODULATOR 有权
标题翻译：数字数字三角形调制器
公开(公告)号：US20130154690A1
公开(公告)日：2013-06-20
申请号：US13715529
申请日：2012-12-14
申请人： University College Cork -National University of Ireland, Cork
发明人： Michael Peter Kennedy
IPC分类号： H03B21/00
CPC分类号： H03B21/00 , H03L7/1974
摘要： Methods and systems are disclosed that provide a radio frequency synthesizer that generates precise frequencies over a large radio frequency range. The radio frequency synthesizer can provide a high resolution of frequency generation and still provide precise frequencies over a range of radio frequencies. The precision and resolution while maintaining a large operating range come from the ability of the frequency synthesizer to generate frequencies as a product of a plurality of moduli. For example, the frequency can be generated from a reference frequency using a first modulus and a second modulus. The plurality of modulo can be implemented using nested digital delta-sigma modulators in a fractional-N frequency synthesizer.
摘要翻译：公开了提供在大的射频范围内产生精确频率的射频合成器的方法和系统。无线电频率合成器可以提供高分辨率的频率产生，并且还能在无线电频率范围内提供精确的频率。维持较大工作范围的精度和分辨率来自于频率合成器产生频率作为多个模数乘积的能力。例如，可以使用第一模数和第二模数从参考频率产生频率。可以使用分数N频率合成器中的嵌套数字Δ-Σ调制器来实现多个模数。

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