公开(公告)号：US08575981B1

公开(公告)日：2013-11-05

申请号：US13538759

申请日：2012-06-29

申请人： Chien Chen Chen ,  YuanHeng Lo ,  Pavan Kumar Alli ,  Yongchou Lo ,  Minhui Yan ,  Harmeet Bhugra

发明人： Chien Chen Chen ,  YuanHeng Lo ,  Pavan Kumar Alli ,  Yongchou Lo ,  Minhui Yan ,  Harmeet Bhugra

IPC分类号： H03L7/06

CPC分类号： H03L7/1974 ,  H03L1/022

摘要： A frequency synthesizer is configured to generate a periodic output signal in response to a periodic input signal and a temperature-dependent frequency adjusting control signal. A temperature sensor is provided, which is configured to generate a temperature measurement signal in response to detecting a temperature of at least a portion of the frequency synthesizer. A control circuit is provided, which is configured to generate the temperature-dependent frequency adjusting control signal in response to the temperature measurement signal. This control circuit includes a cascaded arrangement of an oversampled data converter and a multi-stage digital filter, which is configured to generate a plurality of codes from respective ones of the digital filter stages, and a selection circuit, which is configured to use at least first and second ones of the plurality of codes in sequence during first and second consecutive time intervals to generate the temperature-dependent frequency adjusting control signal.

摘要翻译： 频率合成器被配置为响应于周期性输入信号和与温度相关的频率调节控制信号产生周期性输出信号。 提供了温度传感器，其被配置为响应于检测到频率合成器的至少一部分的温度而产生温度测量信号。 提供控制电路，其被配置为响应于温度测量信号而产生温度相关的频率调节控制信号。 该控制电路包括过采样数据转换器和多级数字滤波器的级联布置，其被配置为从相应的数字滤波器级产生多个代码，以及选择电路，其被配置为至少使用 第一和第二连续时间间隔中的第一和第二代码顺序地产生温度相关的频率调节控制信号。

公开(公告)号：US08604848B1

公开(公告)日：2013-12-10

申请号：US13538719

申请日：2012-06-29

申请人： Chien Chen Chen ,  Pavan Kumar Alli ,  Yongchou Lo ,  Minhui Yan ,  YuanHeng Lo ,  Harmeet Bhugra

发明人： Chien Chen Chen ,  Pavan Kumar Alli ,  Yongchou Lo ,  Minhui Yan ,  YuanHeng Lo ,  Harmeet Bhugra

IPC分类号： H03L7/06

CPC分类号： H03L7/1974 ,  H03L1/022 ,  H03L7/104

摘要： A frequency synthesizer includes a frequency generator configured to generate a periodic output signal in response to a periodic input signal and a temperature-dependent code. A temperature sensor is provided, which is configured to generate a temperature measurement signal in response to detecting a temperature of at least a portion of the frequency synthesizer. A control circuit is provided, which is configured to generate the temperature-dependent code in response to the temperature measurement signal and a plurality of clocks having unequal frequencies. The control circuit can include a cascaded arrangement of an oversampled data converter and a digital filter, which are sequentially responsive to first and second ones of the plurality of clocks during generation of the periodic output signal by the frequency generator.

摘要翻译： 频率合成器包括：频率发生器，被配置为响应于周期性输入信号和与温度相关的代码产生周期性输出信号。 提供了温度传感器，其被配置为响应于检测到频率合成器的至少一部分的温度而产生温度测量信号。 提供控制电路，其被配置为响应于温度测量信号和具有不等频率的多个时钟产生温度相关代码。 控制电路可以包括过采样数据转换器和数字滤波器的级联布置，其在由频率发生器产生周期性输出信号期间顺序响应多个时钟中的第一和第二时钟。