CN204376833U - A kind of high frequency quartz oscillator - Google Patents
A kind of high frequency quartz oscillator Download PDFInfo
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- CN204376833U CN204376833U CN201520006565.0U CN201520006565U CN204376833U CN 204376833 U CN204376833 U CN 204376833U CN 201520006565 U CN201520006565 U CN 201520006565U CN 204376833 U CN204376833 U CN 204376833U
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Abstract
The utility model discloses a kind of high frequency quartz oscillator, comprise triode BG1, for the frequency-selective circuit regulating the bias loop of triode BG1 collector current, be connected with triode BG1, be connected on the quartz crystal between triode and frequency-selective circuit, and be connected to the line switches set between frequency-selective circuit and output; Described bias loop comprises resistance R1, resistance R2, resistance R3, resistance R4 and adjustable resistance W1; Described frequency-selective circuit comprises inductance L 1, electric capacity C2, electric capacity C3 and tunable capacitor C4.The utility model, can the collector current of regulable control triode BG1 by arranging adjustable resistance W1, provides best static working-point; Tunable capacitor C4 being set, feedback factor can not being affected when realizing regulating frequency; Line switches set is set, the value of equivalent load resistance can be regulated.
Description
Technical field
The utility model belongs to crystal oscillator technologies field, in particular to a kind of high frequency quartz oscillator.
Background technology
Quartz oscillator is a kind of resonating device utilizing the piezoelectric effect of the crystalline solid of quartz crystal and silicon dioxide to make, basic comprising comprises quartz crystal, two corresponding surfaces of quartz crystal apply silver layer as electrode, respectively welding a lead-in wire on each electrode receives on pin, add package casing and just constitute quartz-crystal resonator, referred to as quartz crystal or crystal, crystal oscillator.When the frequency of changed electric field is identical with the natural frequency of quartz crystal, vibration just becomes very strong, the reaction of crystal resonant characteristic that Here it is.Utilize this characteristic, just can replace LC resonant tank, filter etc. with quartz resonator.Compared with LC oscillator, the standard of crystal oscillator is better, and the Q value of resonant tank is higher, and under having the situation of carrying, Q value is still very high.
Existing high frequency quartz crystal oscillator circuits complex structure, circuit is connected and fixed, and adjustability is poor, cannot provide the frequency of oscillation of wide region; The situation affecting feedback factor is easily there is when changing circuit major parameter.
Summary of the invention
Goal of the invention: for prior art Problems existing, the utility model provides a kind of high frequency quartz oscillator, and structure is simple, and adjusting function is good, can provide the frequency band of wide region.
Technical scheme: high frequency quartz oscillator described in the utility model, comprise triode BG1, for the frequency-selective circuit regulating the bias loop of triode BG1 collector current, be connected with triode BG1, be connected on the quartz crystal between triode and frequency-selective circuit, and be connected to the line switches set between frequency-selective circuit and output; Described bias loop comprises resistance R1, resistance R2, resistance R3, resistance R4 and adjustable resistance W1, between the base stage that resistance R1, adjustable resistance W1, resistance R3 are connected on triode BG1 and collector electrode, between the base stage that resistance R2 and resistance R4 is connected on triode BG1 and emitter; Described frequency-selective circuit comprises inductance L 1, electric capacity C2, electric capacity C3 and tunable capacitor C4, and inductance L 1, electric capacity C2, electric capacity C3 form three end LC oscillation circuits, and variable capacitance C4 is in parallel with electric capacity C3.By arranging adjustable resistance W1, can the collector current of regulable control triode BG1, best static working-point is provided; Tunable capacitor C4 being set, feedback factor can not being affected when realizing regulating frequency; Line switches set is set, the value of equivalent load resistance can be regulated.
Described line switches set comprises the switching circuitry of some groups of parallel connections, often organizes switching circuitry and is composed in series by switch and resistance R5.
Preferred such scheme further, described line switches set comprises the switching circuitry of three groups of parallel connections.
Described electric capacity C3 is 100pf, and described variable capacitance C4 is adjusted to 1200Pf, and described line switches set equivalent resistance RL is 110K.Be set to above-mentioned value and can reach starting condition for oscillation preferably.
Described triode BG1 model is 9018.9018 types are NPN type low-power transistor, and volume is little, superior performance.
Beneficial effect: compared with prior art, advantage of the present utility model: the waveform adopting the utility model to export is good, the frequency stability of circuit is higher, by suitably strengthening the capacitance in loop, just can reduce the impact of destabilizing factor on frequency of oscillation; Operating frequency can cover the high frequency band scope of tens MHz to hundreds of MHz.Regulate the collector current of triode BG1 by arranging adjustable resistance W1, best static working-point is provided; Tunable capacitor C4 being set, feedback factor can not being affected when realizing regulating frequency; Line switches set is set, the value of equivalent load resistance can be regulated.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below by accompanying drawing, technical solutions of the utility model are described in detail, but protection range of the present utility model is not limited to described embodiment.
embodiment 1:high frequency quartz oscillator as shown in Figure 1, comprise triode BG1, for the frequency-selective circuit regulating the bias loop of triode BG1 collector current, be connected with triode BG1, be connected on the quartz crystal between triode and frequency-selective circuit, and be connected to the line switches set between frequency-selective circuit and output; Bias loop comprises resistance R1, resistance R2, resistance R3, resistance R4 and adjustable resistance W1, between the base stage that resistance R1, adjustable resistance W1, resistance R3 are connected on triode BG1 and collector electrode, between the base stage that resistance R2 and resistance R4 is connected on triode BG1 and emitter; Frequency-selective circuit comprises inductance L 1, electric capacity C2, electric capacity C3 and tunable capacitor C4, and inductance L 1, electric capacity C2, electric capacity C3 form three end LC oscillation circuits, and variable capacitance C4 is in parallel with electric capacity C3; Line switches set comprises the switching circuitry of three groups of parallel connections, often organizes switching circuitry and is composed in series by switch and resistance R5.
Electric capacity C3 is 100pf, and variable capacitance C4 is adjusted to 1200Pf, and coupling capacitance C9 is 50Pf, and line switches set equivalent resistance RL is 110K.Be set to above-mentioned value to reach starting condition for oscillation preferably.
By arranging adjustable resistance W1, can the collector current of regulable control triode BG1, best static working-point is provided; Tunable capacitor C4 being set, feedback factor can not being affected when realizing regulating frequency; Line switches set is set, the value of equivalent load resistance can be regulated.
As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope prerequisite of the present utility model not departing from claims definition, various change can be made in the form and details to it.
Claims (5)
1. a high frequency quartz oscillator, it is characterized in that: comprise triode BG1, for the frequency-selective circuit regulating the bias loop of triode BG1 collector current, be connected with triode BG1, be connected on the quartz crystal between triode and frequency-selective circuit, and be connected to the line switches set between frequency-selective circuit and output; Described bias loop comprises resistance R1, resistance R2, resistance R3, resistance R4 and adjustable resistance W1, between the base stage that resistance R1, adjustable resistance W1, resistance R3 are connected on triode BG1 and collector electrode, between the base stage that resistance R2 and resistance R4 is connected on triode BG1 and emitter; Described frequency-selective circuit comprises inductance L 1, electric capacity C2, electric capacity C3 and tunable capacitor C4, and inductance L 1, electric capacity C2, electric capacity C3 form three end LC oscillation circuits, and variable capacitance C4 is in parallel with electric capacity C3.
2. high frequency quartz oscillator according to claim 1, is characterized in that: described line switches set comprises the switching circuitry of some groups of parallel connections, often organizes switching circuitry and is composed in series by switch and resistance R5.
3. high frequency quartz oscillator according to claim 2, is characterized in that: described line switches set comprises the switching circuitry of three groups of parallel connections.
4. high frequency quartz oscillator according to claim 2, is characterized in that: described electric capacity C3 is 100pf, and described variable capacitance C4 is adjusted to 1200Pf, and described line switches set equivalent resistance RL is 110K.
5. high frequency quartz oscillator according to claim 4, is characterized in that: described triode BG1 model is 9018.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006565.0U CN204376833U (en) | 2015-01-06 | 2015-01-06 | A kind of high frequency quartz oscillator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006565.0U CN204376833U (en) | 2015-01-06 | 2015-01-06 | A kind of high frequency quartz oscillator |
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| CN204376833U true CN204376833U (en) | 2015-06-03 |
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| CN201520006565.0U Active CN204376833U (en) | 2015-01-06 | 2015-01-06 | A kind of high frequency quartz oscillator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107222182A (en) * | 2017-05-30 | 2017-09-29 | 长沙方星腾电子科技有限公司 | A kind of quartz crystal oscillator circuits |
| CN113904626A (en) * | 2021-11-24 | 2022-01-07 | 成都世源频控技术股份有限公司 | High-stability crystal oscillator circuit and implementation method |
| CN114047796A (en) * | 2022-01-12 | 2022-02-15 | 北京晨晶精仪电子有限公司 | Temperature control circuit, constant temperature crystal oscillator circuit and constant temperature crystal oscillator |
-
2015
- 2015-01-06 CN CN201520006565.0U patent/CN204376833U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107222182A (en) * | 2017-05-30 | 2017-09-29 | 长沙方星腾电子科技有限公司 | A kind of quartz crystal oscillator circuits |
| CN107222182B (en) * | 2017-05-30 | 2020-11-27 | 浙江程诚文化用品有限公司 | Quartz crystal oscillator circuit |
| CN113904626A (en) * | 2021-11-24 | 2022-01-07 | 成都世源频控技术股份有限公司 | High-stability crystal oscillator circuit and implementation method |
| CN114047796A (en) * | 2022-01-12 | 2022-02-15 | 北京晨晶精仪电子有限公司 | Temperature control circuit, constant temperature crystal oscillator circuit and constant temperature crystal oscillator |
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Address after: Qixia District of Nanjing City, Jiangsu province science and Technology Park 210049 horses Green Road No. 2 Building No. 2 2 floor Patentee after: China Nanjing Powerise Technology Co. Ltd. Address before: Qixia District of Nanjing City, Jiangsu province science and Technology Park 210049 horses Green Road No. 2 Building No. 2 2 floor Patentee before: Nanjing Highjoint Technology Co., Ltd. |