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1.发明公开公开(公告)号：US20230299777A1
公开(公告)日：2023-09-21
申请号：US17696579
申请日：2022-03-16
Applicant: NXP B.V.
Inventor： Ulrich Moehlmann , Steffen Rode , Ralf Gero Pilaski
CPC classification number: H03L7/0992 , H03L7/093 , H03L2207/50
Abstract: A control system for a digitally controlled oscillator with temperature compensation including a loop detector providing an error value, filter circuitry providing a lower resolution digital value to the DCO to generate an output oscillation signal at a frequency within a lower resolution range, tracking circuitry holding a tracking digital value at a tracking offset from center of a tracking range while the lower resolution digital value is being determined, and then regulating the frequency within a higher resolution range by adjusting the tracking digital value, temperature compensation circuitry performing temperature compensation steps to maintain the tracking digital value between first and second thresholds within the predetermined tracking range, and a controller configured to set the first and second thresholds within a narrow range around the tracking offset during a standard operating mode, and to adjust one or both thresholds within a wide range during a critical operating mode.
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公开(公告)号：US11817869B2
公开(公告)日：2023-11-14
申请号：US17696579
申请日：2022-03-16
Applicant: NXP B.V.
Inventor： Ulrich Moehlmann , Steffen Rode , Ralf Gero Pilaski
CPC classification number: H03L7/0992 , H03L7/093 , H03L2207/50
Abstract: A control system for a digitally controlled oscillator with temperature compensation including a loop detector providing an error value, filter circuitry providing a lower resolution digital value to the DCO to generate an output oscillation signal at a frequency within a lower resolution range, tracking circuitry holding a tracking digital value at a tracking offset from center of a tracking range while the lower resolution digital value is being determined, and then regulating the frequency within a higher resolution range by adjusting the tracking digital value, temperature compensation circuitry performing temperature compensation steps to maintain the tracking digital value between first and second thresholds within the predetermined tracking range, and a controller configured to set the first and second thresholds within a narrow range around the tracking offset during a standard operating mode, and to adjust one or both thresholds within a wide range during a critical operating mode.
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公开(公告)号：US20160149559A1
公开(公告)日：2016-05-26
申请号：US14941941
申请日：2015-11-16
Applicant: NXP B.V.
Inventor： Andreas Johannes Köllmann , Steffen Rode , Joachim Utzig , Joerg Syré
IPC: H03H11/12
CPC classification number: H03H11/1213 , G05F1/56 , H03H7/06 , H03H11/1217 , H03H11/245
Abstract: A low-pass filter comprising: a filter input terminal; a filter output terminal; a filter FET configured to provide a resistance between the filter input terminal and the filter output terminal; a filter capacitor connected between the filter output terminal and a reference terminal; a bias FET configured to provide a bias voltage to the filter FET; a buffer connected between the filter input terminal and the bias FET, the buffer configured to source a bias current for the bias FET; and an offset voltage source configured to contribute to the bias voltage provided to the filter FET.
Abstract translation: 一种低通滤波器，包括：滤波器输入端; 滤波器输出端子; 滤波器FET，被配置为提供所述滤波器输入端子和所述滤波器输出端子之间的电阻; 滤波电容器连接在滤波器输出端子和参考端子之间; 偏置FET，被配置为向所述滤波器FET提供偏置电压; 连接在所述滤波器输入端子和所述偏置FET之间的缓冲器，所述缓冲器被配置为为所述偏置FET馈送偏置电流; 以及被配置为有助于提供给所述滤波器FET的偏置电压的偏移电压源。
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公开(公告)号：US09479141B2
公开(公告)日：2016-10-25
申请号：US14941941
申请日：2015-11-16
Applicant: NXP B.V.
Inventor： Andreas Johannes Köllmann , Steffen Rode , Joachim Utzig , Joerg Syré
CPC classification number: H03H11/1213 , G05F1/56 , H03H7/06 , H03H11/1217 , H03H11/245
Abstract: A low-pass filter comprising: a filter input terminal; a filter output terminal; a filter FET configured to provide a resistance between the filter input terminal and the filter output terminal; a filter capacitor connected between the filter output terminal and a reference terminal; a bias FET configured to provide a bias voltage to the filter FET; a buffer connected between the filter input terminal and the bias FET, the buffer configured to source a bias current for the bias FET; and an offset voltage source configured to contribute to the bias voltage provided to the filter FET.
Abstract translation: 一种低通滤波器，包括：滤波器输入端; 滤波器输出端子; 滤波器FET，被配置为提供所述滤波器输入端子和所述滤波器输出端子之间的电阻; 滤波电容器连接在滤波器输出端子和参考端子之间; 偏置FET，被配置为向所述滤波器FET提供偏置电压; 连接在所述滤波器输入端子和所述偏置FET之间的缓冲器，所述缓冲器被配置为为所述偏置FET馈送偏置电流; 以及被配置为有助于提供给所述滤波器FET的偏置电压的偏移电压源。
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