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1. 发明公开

KR1020000057646A 수정 발진기용 온도 보상 회로 无效
标题翻译：晶体振荡器温度补偿电路
公开(公告)号：KR1020000057646A
公开(公告)日：2000-09-25
申请号：KR1019997005451
申请日：1997-10-15
申请人： 씨티에스 코포레이션
发明人： 슈틀리프,리차드,엔. , 라자,시에드,에스. , 로리치,머다이어스,에프. , 텔레마퀴,블라디미어
IPC分类号： H03L1/02
CPC分类号： H03B5/368 , H03B5/362 , H03B2200/0034 , H03B2201/0208 , H03J7/12 , H03L1/025 , H03L1/028 , H04B1/40
摘要： PURPOSE: A temperature compensation circuit for a crystal oscillator module used in a communication device is provided to obtain improved temperature compensated output frequency without an on-board ASIC(application specific intrefrated circuit). CONSTITUTION: A temperature compensation circuit(10) for a crystal oscillator module(12) used in a communication device. An existing microcontroller of the communication device is used to provide temperature compensating digital data(30) for a crystal oscillator(18). In this way, the crystal oscillator module(12) does not require an on-board memory which substantially cuts costs. The temperature compensation digital data(30) is converted to a temperature compensation signal(22) in a digital-to-analog converter which controls the crystal oscillator frequency. However, typical digital-to-analog converters are driven by voltage regulators which vary over temperature. To solve this problem, the crystal oscillator module(12) includes an on-board voltage regulator(34) which supplies a characterized regulated voltage(36) to the digital-to-analog converter such that the temperature compensation signal(22) from the digital-to-analog converter is inherently corrected for voltage variations in the voltage regulator(34). This improves stability of the output frequency(20) from about 5 ppm to about 2 ppm.
摘要翻译：目的：提供在通信设备中使用的晶体振荡器模块的温度补偿电路，以获得改进的温度补偿输出频率，而无需板载ASIC（专用自适应专用电路）。构成：在通信装置中使用的用于晶体振荡器模块（12）的温度补偿电路（10）。通信设备的现有微控制器用于为晶体振荡器（18）提供温度补偿数字数据（30）。以这种方式，晶体振荡器模块（12）不需要基本上降低成本的板上存储器。温度补偿数字数据（30）被转换成控制晶体振荡器频率的数 - 模转换器中的温度补偿信号（22）。然而，典型的数模转换器由温度变化的电压调节器驱动。为了解决这个问题，晶体振荡器模块（12）包括一个板上电压调节器（34），其向数模转换器提供一个表征的调节电压（36），使得温度补偿信号（22）从数字到模拟转换器固有地校正了电压调节器（34）中的电压变化。这提高了输出频率（20）从约5ppm到约2ppm的稳定性。

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