CN202586872U - High precision passive clock module with temperature compensation - Google Patents
High precision passive clock module with temperature compensation Download PDFInfo
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- CN202586872U CN202586872U CN 201220153252 CN201220153252U CN202586872U CN 202586872 U CN202586872 U CN 202586872U CN 201220153252 CN201220153252 CN 201220153252 CN 201220153252 U CN201220153252 U CN 201220153252U CN 202586872 U CN202586872 U CN 202586872U
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Abstract
The utility model relates to a passive clock and provides a high precision passive clock module with temperature compensation. The high precision passive clock module comprises a high precision passive clock unit, a temperature measuring unit and an interface J1. The high precision passive clock unit comprises a crystal Y1, a capacitor C1, a capacitor C2, capacitor C3, and a capacitor C4. The temperature measuring unit comprises a precision resistor R2 and a thermal resistor R1. According to the high precision passive clock module, an influence of temperature on clock precision can be effectively improved, at the same time, cost is reduced, and precision is raised.
Description
Technical field
The utility model relates to a kind of passive clock, particularly a kind of passive high-precision clock module with temperature-compensating.
Background technology
Mostly passive clock commonly used is the oscillating circuit that crystal and electric capacity are formed in the industry at present, directly is welded near the chip.This circuit structure is simple, receives in the external environment factor affecting such as temperature, humidity bigger, and frequency stability is poor; And generally be placed on the main circuit board, the operability of frequency calibration is not high, can not satisfy the needs of modern industry volume production.
Summary of the invention
The purpose of the utility model is exactly in order to overcome the weak point of above-mentioned prior art, and a kind of passive high-precision clock module with temperature-compensating is provided, and it can effectively improve the influence of temperature to clock accuracy, reduces cost, improves precision simultaneously.
The purpose of the utility model realizes through following technical measures: the passive high-precision clock module of band temperature-compensating; Comprise passive high-precision clock unit, temperature measurement unit and interface J1, said passive high-precision clock unit comprises crystal Y1, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4; Said temperature measurement unit comprises precision resistance R2 and thermistor R1; 1 pin of said interface J1 is the temperature detection end, is connected to thermistor R1, the other end ground connection of thermistor R1; 2 pin of interface J1 are the temperature detection power end, are connected to thermistor R1 through precision resistance R2; 3 pin of interface J1 are the oscillator signal input, and 4 pin of interface J1 are the oscillator signal output, are connected with crystal Y1 between 3 pin of interface J1 and 4 pin; The 3 foot meridian capacitor C3 ground connection of interface J1, capacitor C 1, capacitor C 2 also are connected in capacitor C 3 two ends; The 4 foot meridian capacitor C4 ground connection of interface J1, the 5 pin ground connection of interface J1.Wherein, capacitor C 3 is an oscillator input matching capacitance, and capacitor C 1 is a frequency compensation adjustment electric capacity with C2, and capacitor C 4 is the oscillator output end matching capacitance.
In technique scheme, said interface J1 is the package module interface, directly links to each other with single-chip microcomputer mouth line.
The passive high-precision clock module of the utility model band temperature-compensating is realized the output of oscillator high accuracy through the adjustment building-out capacitor; Temperature measurement unit is accomplished passive clock ambient temperature measurement; Chip microcontroller guarantees high accuracy within the specific limits to the temperature-compensating of passive clock.
The usefulness of the utility model is: after the crystal oscillator calibration, temperature measurement unit and passive clock unit are packaged together, the factor such as humidity, temperature of effectively having improved in the external environment is to the influence of clock accuracy; Temperature measurement unit is directly measured the clock unit temperature, has realized high accuracy, and is highly reliable; Realize high integration simultaneously, volume is little, and is easy to use, helps reducing cost; The high low temperature of modularization encapsulation realization is examined entirely, helps realizing producing in batches.
Description of drawings
Fig. 1 is the circuit connection diagram of the passive high-precision clock module of the utility model band temperature-compensating.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further to describe.
As shown in Figure 1; Present embodiment provides a kind of passive high-precision clock module with temperature-compensating; Comprise passive high-precision clock unit, temperature measurement unit and interface J1, said passive high-precision clock unit comprises crystal Y1, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4; Said temperature measurement unit comprises precision resistance R2 and thermistor R1; 1 pin of said interface J1 is the temperature detection end, is connected to thermistor R1, the other end ground connection of thermistor R1; 2 pin of interface J1 are the temperature detection power end, are connected to thermistor R1 through precision resistance R2; 3 pin of interface J1 are the oscillator signal input, and 4 pin of interface J1 are the oscillator signal output, are connected with crystal Y1 between 3 pin of interface J1 and 4 pin; The 3 foot meridian capacitor C3 ground connection of interface J1, capacitor C 1, capacitor C 2 also are connected in capacitor C 3 two ends; The 4 foot meridian capacitor C4 ground connection of interface J1, the 5 pin ground connection of interface J1.Wherein, C3 is an oscillator input matching capacitance, and C1 and C2 are frequency compensation adjustment electric capacity, and C4 is the oscillator output end matching capacitance.
In the foregoing description, said interface J1 is the package module interface, directly links to each other with single-chip microcomputer mouth line.
In the foregoing description; To carry out thermometric thermistor and be placed near the crystal, and directly measure the crystalline environment temperature, passive clock unit is through adjusting building-out capacitor with crystal calibration; Then temperature measurement unit and passive clock unit are packaged together; Link to each other with single-chip microcomputer through interface, single-chip microcomputer carries out temperature-compensating according to the data of temperature measurement unit to the frequency of oscillation of clock, realizes the high accuracy of passive clock.
The content that this specification is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (2)
1. the passive high-precision clock module of band temperature-compensating comprises passive high-precision clock unit, temperature measurement unit and interface J1, and it is characterized in that: said passive high-precision clock unit comprises crystal Y1, capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4; Said temperature measurement unit comprises precision resistance R2 and thermistor R1; 1 pin of said interface J1 is the temperature detection end, is connected to thermistor R1, the other end ground connection of thermistor R1; 2 pin of interface J1 are the temperature detection power end, are connected to thermistor R1 through precision resistance R2; 3 pin of interface J1 are the oscillator signal input, and 4 pin of interface J1 are the oscillator signal output, are connected with crystal Y1 between 3 pin of interface J1 and 4 pin; The 3 foot meridian capacitor C3 ground connection of interface J1, capacitor C 1, capacitor C 2 also are connected in capacitor C 3 two ends; The 4 foot meridian capacitor C4 ground connection of interface J1, the 5 pin ground connection of interface J1.
2. the passive high-precision clock module of band temperature-compensating according to claim 1 is characterized in that: said interface J1 is the package module interface, directly links to each other with single-chip microcomputer mouth line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220153252 CN202586872U (en) | 2012-04-12 | 2012-04-12 | High precision passive clock module with temperature compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220153252 CN202586872U (en) | 2012-04-12 | 2012-04-12 | High precision passive clock module with temperature compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202586872U true CN202586872U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220153252 Expired - Fee Related CN202586872U (en) | 2012-04-12 | 2012-04-12 | High precision passive clock module with temperature compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202586872U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811964A (en) * | 2014-12-31 | 2016-07-27 | 展讯通信（上海）有限公司 | Radio frequency communication terminal |
| WO2022057953A1 (en) * | 2020-09-18 | 2022-03-24 | 河南许继仪表有限公司 | Circuit for improving clock accuracy, and clock |
-
2012
- 2012-04-12 CN CN 201220153252 patent/CN202586872U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811964A (en) * | 2014-12-31 | 2016-07-27 | 展讯通信（上海）有限公司 | Radio frequency communication terminal |
| WO2022057953A1 (en) * | 2020-09-18 | 2022-03-24 | 河南许继仪表有限公司 | Circuit for improving clock accuracy, and clock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20210412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |