CN201477155U - Crystal oscillator frequency tester - Google Patents

Crystal oscillator frequency tester Download PDF

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Publication number
CN201477155U
CN201477155U CN2009201955989U CN200920195598U CN201477155U CN 201477155 U CN201477155 U CN 201477155U CN 2009201955989 U CN2009201955989 U CN 2009201955989U CN 200920195598 U CN200920195598 U CN 200920195598U CN 201477155 U CN201477155 U CN 201477155U
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CN
China
Prior art keywords
frequency
crystal oscillator
circuit
signal
meter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2009201955989U
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Chinese (zh)
Inventor
袁志鸿
孙平
刘文燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Unionman Technology Co Ltd
Original Assignee
HUIZHOU UNIONMAN TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Priority to CN2009201955989U priority Critical patent/CN201477155U/en
Application granted granted Critical
Publication of CN201477155U publication Critical patent/CN201477155U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a crystal oscillator frequency detector, in particular to a device which can accurately measure the frequency of a crystal oscillator welded in the circuit of a product. The crystal oscillator frequency tester comprises a frequency meter used for detecting a frequency signal; the frequency signal is coupled to the device through a solenoid coil and transmitted to the frequency meter after processing; and a filter circuit and a signal amplifying circuit are arranged between the solenoid coil and the frequency meter in sequence. The crystal oscillator frequency tester can conveniently and accurately measure the frequency of the crystal oscillator welded in the circuit of the product, thus being capable of providing accurate frequency testing result in quality inspection, debugging or maintenance of products with high requirement on the crystal oscillator; and the accurate frequency testing result is provided for a technical engineer for better analyzing and solving problems, and is beneficial to accurate master of products of technicians and improvement of efficiency.

Description

A kind of crystal oscillator frequency proving installation
Technical field
The utility model relates to a kind of pick-up unit of crystal oscillator frequency, specifically is meant a kind of device that can accurately measure the crystal oscillator frequency that is welded in the product circuit.
Background technology
Crystal oscillator is a kind of very important components and parts of electronics big family, its role is to produce original clock frequency, this frequency through the frequency multiplication of frequency generator or frequency division after as various bus frequency in the electronic product.Can test with crystal analyzer during the frequency test of crystal oscillator monomer, but be welded to crystal oscillator in the product circuit, its frequency just can't adopt crystal analyzer to test.If the mode of taking to connect the output frequency angle of probe point survey crystal oscillator with analyser is measured its frequency, then can produce impedance matching to it, changed the peripheral circuit of crystal, cause test result inaccurate, this method is also cumbersome simultaneously.
The utility model content
The problem that the utility model need solve provides a kind of proving installation that has been welded to the crystal oscillator frequency in the product circuit that can make things convenient for, measure accurately.
For addressing the above problem, the technical scheme that the utility model is taked is: a kind of crystal oscillator frequency proving installation is provided, comprises being used for the frequency meter that frequency signal detects, described frequency signal is coupled to described device and is transferred to frequency meter by solenoid; Between solenoid and frequency meter, be provided with filtering circuit, signal amplification circuit successively.
The π type filtering circuit that described filtering circuit adopts electric capacity, inductance to form.
The second amplifying circuit that described signal amplification circuit adopts two triodes to form.
The beneficial effects of the utility model are: described device can make things convenient for, accurately measure the frequency that is welded to the crystal oscillator in the product circuit, for some crystal oscillator is required point-device product like this, in product examine, debugging or the maintenance of product, frequency test result accurately just can be provided, the confession technician better analyzes and deals with problems, be beneficial to the technician and accurately hold the product situation, raise the efficiency.
Description of drawings
Fig. 1 forms schematic block diagram for the utility model principle;
Fig. 2 is the utility model embodiment circuit theory diagrams.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Quartz crystal is a kind of important piezoelectric crystal material, itself is not oscillator, and it is by means of having source forcing and passive reactance network to produce vibration.The effect of crystal oscillator in electronic product is increasing, purposes also more and more widely, simultaneously electronic product relies on more to crystal oscillator, and is then also more and more harsher to its performance requirement.For the monomer crystal oscillator, there are various modes that it is measured in the prior art, but, often feel simply helpless for the crystal oscillator of the complete machine of packing into.
Device described in the utility model utilizes the mode of signal coupling to solve the problem of test complete machine crystal frequency, and so that frequency test result accurately to be provided, the confession technician better analyzes and deals with problems.
As shown in Figure 1, the utility model comprises in turn solenoid 12, filtering circuit 13, amplifying circuit 14 and the frequency meter 15 that connects, and also is included as the external power supply circuit 16 that filtering circuit 13, amplifying circuit 14 provide working power.
In the application, the crystal oscillator crystal inside normally produces a kind of wave of oscillation, this ripple can be gone out by electromagnetic field radiation, the energy capture that external coil 12 gives off crystal by induction, produce induction current, this current signal is sent into amplifying circuit 14 after by filtering circuit 13 filtering, and the signal after amplifying at double is input to frequency meter again, detects the frequency of signal waveform.
As Fig. 2 is the utility model one embodiment circuit theory diagrams.As figure, inductive coil A1 senses the electromagnetic field that crystal produces, produce induction current, resistance R 5 and capacitor C 9 are used for impedance matching, make induction current reach maximum, the π type filter network that this current signal is formed through capacitor C 7, C8, inductance L 3, the extraneous high frequency waves of filtering 16M ~ 160M, the second amplifying circuit of forming via triode Q1, Q2 amplifies then, signal after the amplification can be exported to frequency meter again after filtering, to reach quite good detecting effectiveness, finally detect frequency by frequency meter.
Because whole test process probe contact of no use crystal only carries out the signal coupling in crystal periphery, can not produce impedance to crystal like this, so test result accurately and reliably.

Claims (4)

1. a crystal oscillator frequency proving installation comprises being used for the frequency meter that frequency signal detects, and it is characterized in that: also include the solenoid of induction frequencies signal, described frequency signal to be detected is given frequency meter by the solenoid coupled transfer.
2. crystal oscillator frequency proving installation according to claim 1 is characterized in that, is provided with filtering circuit, signal amplification circuit between solenoid and frequency meter successively.
3. crystal oscillator frequency proving installation according to claim 2 is characterized in that, described filtering circuit is the π type filtering circuit that electric capacity (C7, C8) inductance (L3) is formed.
4. crystal oscillator frequency proving installation according to claim 2 is characterized in that, described signal amplification circuit comprises the second amplifying circuit that triode (Q1, Q2) is formed.
CN2009201955989U 2009-09-25 2009-09-25 Crystal oscillator frequency tester Expired - Fee Related CN201477155U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009201955989U CN201477155U (en) 2009-09-25 2009-09-25 Crystal oscillator frequency tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201955989U CN201477155U (en) 2009-09-25 2009-09-25 Crystal oscillator frequency tester

Publications (1)

Publication Number Publication Date
CN201477155U true CN201477155U (en) 2010-05-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009201955989U Expired - Fee Related CN201477155U (en) 2009-09-25 2009-09-25 Crystal oscillator frequency tester

Country Status (1)

Country Link
CN (1) CN201477155U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103105530A (en) * 2013-01-08 2013-05-15 河北远东通信***工程有限公司 Detection method for frequency hopping changes of crystal oscillator
CN103698603A (en) * 2013-12-27 2014-04-02 深圳芯邦科技股份有限公司 Chip, chip clock testing method and chip clock testing system
CN104849544A (en) * 2015-02-02 2015-08-19 天津必利优科技发展有限公司 Multipath pai network quartz crystal test system and test method
CN109975617A (en) * 2019-04-23 2019-07-05 晶晨半导体(上海)股份有限公司 A kind of the test circuit and test method of matched crystal load capacitance
CN112684216A (en) * 2020-12-29 2021-04-20 北京无线电计量测试研究所 Temperature compensation crystal oscillator debugging clamp

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103105530A (en) * 2013-01-08 2013-05-15 河北远东通信***工程有限公司 Detection method for frequency hopping changes of crystal oscillator
CN103698603A (en) * 2013-12-27 2014-04-02 深圳芯邦科技股份有限公司 Chip, chip clock testing method and chip clock testing system
CN103698603B (en) * 2013-12-27 2017-03-15 深圳芯邦科技股份有限公司 A kind of chip and its clock test methodology and chip clock test system
CN104849544A (en) * 2015-02-02 2015-08-19 天津必利优科技发展有限公司 Multipath pai network quartz crystal test system and test method
CN109975617A (en) * 2019-04-23 2019-07-05 晶晨半导体(上海)股份有限公司 A kind of the test circuit and test method of matched crystal load capacitance
CN112684216A (en) * 2020-12-29 2021-04-20 北京无线电计量测试研究所 Temperature compensation crystal oscillator debugging clamp

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee
CP02 Change in the address of a patent holder

Address after: 516002 Guangdong City, Huizhou Digital Industrial Park, No. 4, South District, building 1, floor 2

Patentee after: Huizhou Unionman Technology Co., Ltd.

Address before: 516007, Huicheng District, Guangdong Province, Huizhou Road, No. 8 Huayang Building No. 8, 14, 18 floor

Patentee before: Huizhou Unionman Technology Co., Ltd.

C56 Change in the name or address of the patentee

Owner name: GUANGDONG UNIONMAN TECHNOLOGY CO., LTD.

Free format text: FORMER NAME: HUIZHOU UNIONMAN TECHNOLOGY CO., LTD.

CP01 Change in the name or title of a patent holder

Address after: 516002 Guangdong City, Huizhou Digital Industrial Park, No. 4, South District, building 1, floor 2

Patentee after: Guangdong Unionman Technology Co., Ltd.

Address before: 516002 Guangdong City, Huizhou Digital Industrial Park, No. 4, South District, building 1, floor 2

Patentee before: Huizhou Unionman Technology Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100519

Termination date: 20140925

EXPY Termination of patent right or utility model