公开(公告)号：US09356606B2

公开(公告)日：2016-05-31

申请号：US14339113

申请日：2014-07-23

Applicant: Silicon Laboratories Inc.

Inventor： Aaron J. Caffee ,  Brian G. Drost ,  Hendricus de Ruijter

IPC: H03B1/00 ,  H03L1/00 ,  H03B5/12 ,  H03L7/02 ,  H03L1/02 ,  H03L7/183

CPC classification number: H03B5/12 ,  H03B1/00 ,  H03B5/36 ,  H03L1/026 ,  H03L7/02 ,  H03L7/183 ,  H03L7/1976

Abstract: A clock generator comprises a free-running oscillator and a tunable frequency synthesizer. The free-running oscillator has an output for providing an oscillator clock signal. The tunable frequency synthesizer is coupled to the free-running oscillator and provides a clock output signal in response to the oscillator clock signal and a frequency control signal. The frequency control signal corresponds to a measured characteristic of the free-running oscillator.

Abstract translation: 时钟发生器包括自由振荡器和可调频率合成器。 自由振荡器具有用于提供振荡器时钟信号的输出。 可调谐频率合成器耦合到自由振荡器，并响应振荡器时钟信号和频率控制信号提供时钟输出信号。 频率控制信号对应于自由振荡器的测量特性。

公开(公告)号：US20160028405A1

公开(公告)日：2016-01-28

申请号：US14339113

申请日：2014-07-23

Applicant: Silicon Laboratories Inc.

Inventor： Aaron J. Caffee ,  Brian G. Drost ,  Hendricus de Ruijter

IPC: H03L1/00 ,  H03B5/12

CPC classification number: H03B5/12 ,  H03B1/00 ,  H03B5/36 ,  H03L1/026 ,  H03L7/02 ,  H03L7/183 ,  H03L7/1976

Abstract: A clock generator comprises a free-running oscillator and a tunable frequency synthesizer. The free-running oscillator has an output for providing an oscillator clock signal. The tunable frequency synthesizer is coupled to the free-running oscillator and provides a clock output signal in response to the oscillator clock signal and a frequency control signal. The frequency control signal corresponds to a measured characteristic of the free-running oscillator.

Abstract translation: 时钟发生器包括自由振荡器和可调频率合成器。 自由振荡器具有用于提供振荡器时钟信号的输出。 可调谐频率合成器耦合到自由振荡器，并响应振荡器时钟信号和频率控制信号提供时钟输出信号。 频率控制信号对应于自由振荡器的测量特性。

公开(公告)号：US20150091537A1

公开(公告)日：2015-04-02

申请号：US14040839

申请日：2013-09-30

Applicant: Silicon Laboratories Inc.

Inventor： Aaron J. Caffee ,  Brian G. Drost

IPC: G05F1/575

CPC classification number: G05F1/575

Abstract: Reference signal generators using thermistors are disclosed. An apparatus includes a first device having a first temperature coefficient and a thermistor having a second temperature coefficient having a sign opposite to that of the first temperature coefficient. A circuit maintains equivalence of a first signal and a second signal and offsets a first temperature variation of the first device using a second temperature variation of the thermistor to generate the second signal having a low temperature coefficient. The first device may be a bipolar transistor configured to generate a base-emitter voltage and coupled in series with the thermistor. The first signal may be a first voltage on a first node. The second signal may be a second voltage on a second node. The circuit may be configured to maintain effective equivalence of the first voltage and the second voltage. The apparatus may include a resistor coupled to the second node.

Abstract translation: 公开了使用热敏电阻的参考信号发生器。 一种装置包括具有第一温度系数的第一装置和具有与第一温度系数相反的符号的第二温度系数的热敏电阻。 电路维持第一信号和第二信号的等效，并且利用热敏电阻的第二温度变化来抵消第一装置的第一温度变化，以产生具有低温度系数的第二信号。 第一器件可以是被配置为产生基极 - 发射极电压并与热敏电阻串联耦合的双极晶体管。 第一信号可以是第一节点上的第一电压。 第二信号可以是第二节点上的第二电压。 电路可以被配置为保持第一电压和第二电压的有效等效。 该装置可以包括耦合到第二节点的电阻器。