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公开(公告)号：US20180198407A1
公开(公告)日：2018-07-12
申请号：US15740738
申请日：2015-07-27
Applicant: GUANGDONG DAPU TELECOM TECHNOLOGY CO., LTD.
Inventor： Yifeng WANG , Chaosheng LIU
CPC classification number: H03B5/04 , H03B5/36 , H03L1/04 , H05K1/0212 , H05K1/0306 , H05K1/167 , H05K1/181 , H05K2201/10068 , H05K2201/10075 , H05K2201/10151 , H05K2201/10196
Abstract: The disclosure relates to the technical field of quartz crystal oscillators, in particular to a direct temperature measurement oven controlled crystal oscillator. The direct temperature measurement oven controlled crystal oscillator according to the present disclosure does not require additional components for measuring the temperature of the wafer inside the crystal oscillator. Instead, the temperature measurement device is disposed on the surface of the wafer to directly measure the temperature of the wafer itself, In order to achieve the exact temperature of the wafer itself. The oven controlled crystal oscillator according to the present disclosure has a simple in structure and is easy to be manufactured. The temperature of the wafer itself is directly measured to make temperature measurement more accurate.
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Patent Agency Ranking
公开(公告)号：US09019022B2
公开(公告)日：2015-04-28
申请号：US14236587
申请日：2012-11-20
Applicant: Guangdong Dapu Telecom Technology Co., Ltd.
Inventor： Chaosheng Liu
CPC classification number: H03L1/04 , H05K3/30 , Y10T29/4913
Abstract: The present invention discloses an Oven Controlled Crystal Oscillator and a manufacturing method thereof. The Oven Controlled Crystal Oscillator comprises a thermostatic bath, a heating device, a PCB and a signal generating element, where the signal generating element is used for generating a signal of a certain frequency, the heating device, the PCB and the signal generating element are mounted in the thermostatic bath, the signal generating element is mounted in a groove formed on one side of the PCB, while the heating device is mounted against the other side of the PCB that is opposite to the groove. The signal generating element may be a passive crystal resonator or an active crystal oscillator. The Oven Controlled Crystal Oscillator according to the invention is advantageous for a small volume and a high temperature control precision.
Abstract translation: 本发明公开了一种烤箱控制晶体振荡器及其制造方法。 烤箱控制晶体振荡器包括恒温槽，加热装置，PCB和信号发生元件，其中信号产生元件用于产生特定频率的信号，加热装置，PCB和信号产生元件是 安装在恒温槽中，信号发生元件安装在形成在PCB的一侧上的凹槽中，而加热装置抵靠与凹槽相对的PCB的另一侧安装。 信号发生元件可以是无源晶体谐振器或有源晶体振荡器。 根据本发明的烤箱控制晶体振荡器对于小体积和高温度控制精度是有利的。
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公开(公告)号：US10917099B2
公开(公告)日：2021-02-09
申请号：US16474108
申请日：2017-01-22
Applicant: GUANGDONG DAPU TELECOM TECHNOLOGY CO., LTD.
Inventor： Hui Zhang , Zhong Yi , Jianbo Lu , Wencai Qiu
Abstract: Disclosed are a method and a device for improving an output accuracy of a digital-to-analog converter. The method includes: calculating an output error of the digital-to-analog converter based on output accuracy and an input error of the digital-to-analog converter; obtaining at least one of the output error, comparing the at least one output error against a preset threshold, and adjusting an integer input value of the digital-to-analog converter according to a comparison result.
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公开(公告)号：US20200021242A1
公开(公告)日：2020-01-16
申请号：US16471087
申请日：2017-02-24
Applicant: GUANGDONG DAPU TELECOM TECHNOLOGY CO., LTD.
Inventor： Yifeng Wang , Chaosheng Liu , Wencai Qiu
Abstract: Disclosed are an oven controlled crystal oscillator device and a frequency compensation method thereof. The oven controlled crystal oscillator device includes: an oven, a microcontroller, an oven controlled crystal oscillator disposed in the oven, and a current detection circuit. The current detection circuit is coupled to the oven controlled crystal oscillator, and is configured to obtain an operating current value of the oven controlled crystal oscillator and provide the operating current value to the microcontroller. The microcontroller is configured to determine a frequency compensation amount according to the operating current value based on a frequency compensation rule, and output the frequency compensation amount to the oven controlled crystal oscillator to compensate an output frequency.
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公开(公告)号：US20180191299A1
公开(公告)日：2018-07-05
申请号：US15740273
申请日：2015-07-27
Applicant: GUANGDONG DAPU TELECOM TECHNOLOGY CO., LTD.
Inventor： Yifeng WANG , Chaosheng LIU
CPC classification number: H03B5/04 , H03B5/32 , H03H9/02102 , H03H9/19 , H03L1/04
Abstract: The present disclosure relates to the technical field of quartz crystal oscillators, and particularly, to a directly-heating oven controlled crystal oscillator. The surface of a wafer is provided with wires, two ends of each wire are respectively connected to one ends of support columns located inside a mounting space, and the other ends of the support columns located outside the mounting space are connected to a crystal pin. Accordingly, the wires on the surface of the wafer are connected to an external circuit by means of the support columns and the crystal pins, and the wires generate heat to heat the wafer after the wires are given a current by the external circuit.
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公开(公告)号：US20140320220A1
公开(公告)日：2014-10-30
申请号：US14236587
申请日：2012-11-20
Applicant: Guangdong Dapu Telecom Technology Co., Ltd.
Inventor： Chaosheng Liu
CPC classification number: H03L1/04 , H05K3/30 , Y10T29/4913
Abstract: The present invention discloses an Oven Controlled Crystal Oscillator and a manufacturing method thereof. The Oven Controlled Crystal Oscillator comprises a thermostatic bath, a heating device, a PCB and a signal generating element, where the signal generating element is used for generating a signal of a certain frequency, the heating device, the PCB and the signal generating element are mounted in the thermostatic bath, the signal generating element is mounted in a groove formed on one side of the PCB, while the heating device is mounted against the other side of the PCB that is opposite to the groove. The signal generating element may be a passive crystal resonator or an active crystal oscillator. The Oven Controlled Crystal Oscillator according to the invention is advantageous for a small volume and a high temperature control precision.
Abstract translation: 本发明公开了一种烤箱控制晶体振荡器及其制造方法。 烤箱控制晶体振荡器包括恒温槽，加热装置，PCB和信号发生元件，其中信号产生元件用于产生特定频率的信号，加热装置，PCB和信号产生元件是 安装在恒温槽中，信号发生元件安装在形成在PCB的一侧上的凹槽中，而加热装置抵靠与凹槽相对的PCB的另一侧安装。 信号发生元件可以是无源晶体谐振器或有源晶体振荡器。 根据本发明的烤箱控制晶体振荡器对于小体积和高温度控制精度是有利的。
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