CN208190632U - When frequency module - Google Patents
When frequency module Download PDFInfo
- Publication number
- CN208190632U CN208190632U CN201821242003.6U CN201821242003U CN208190632U CN 208190632 U CN208190632 U CN 208190632U CN 201821242003 U CN201821242003 U CN 201821242003U CN 208190632 U CN208190632 U CN 208190632U
- Authority
- CN
- China
- Prior art keywords
- crystal oscillator
- frequency
- phase
- power splitter
- mixer
- 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
Links
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The utility model discloses it is a kind of when frequency module, including 10MHz crystal oscillator, R frequency dividing, Fractional-N frequency, phase discriminator, loop filter and voltage-controlled 10.23MHz crystal oscillator, power splitter, frequency mixer, 230KHz filter, wherein R divides input terminal connection and refers to 10MHz crystal oscillator, R frequency division output terminal is sequentially connected phase discriminator, loop filter, voltage-controlled 10.23MHz crystal oscillator, power splitter, power splitter output signal all the way, mixer input is connected all the way, mixer input is also connected with 10MHz crystal oscillator, mixer output is successively through 230KHz filter, Fractional-N frequency connects phase discriminator input terminal, the homologous output of the utility model crystal oscillator, the stability and very high purity of output signal, homologous reference signal can be provided for frequency source.Novel with the scheme of crystal oscillator frequency conversion and phase-lock crystal oscillator, compared to traditional monocycle locking phase scheme, the phase noise characteristic of module substantially improves on the basis of identical device.
Description
Technical field
The utility model belongs to radio circuit technical field, and in particular to frequency module when a kind of.
Background technique
With the fast development of Modern wireless communication and Radar Technology, the performance of communication system and radar system is faced with
Higher more harsh challenge, critical component one of of the frequency source as system, by the performance for the system that directly affects.Phase noise is
The communication quality of the key index of frequency synthesis technique, directly decision wireless system and radar system and detection accuracy etc..?
In general frequency source phase-locked loop circuit design, the reference signal using the output signal of crystal oscillator as source, crystal oscillator has high stable
High-purity characteristic determines that it normalizes phase noise and is far superior to phase discriminator normalization noise floor, therefore is calculating phaselocked loop
When phase of output signal noise, often ignore the influence of crystal oscillator.
Utility model content
The utility model technical issues that need to address are to provide a kind of homologous output of crystal oscillator, and the stability of output signal
And the when frequency module of very high purity.
To solve the above problems, technical solution adopted in the utility model is:
Frequency module when a kind of, including 10MHz crystal oscillator, R frequency dividing, Fractional-N frequency, phase discriminator, loop filter and voltage-controlled
10.23MHz crystal oscillator, power splitter, frequency mixer, 230KHz filter, wherein R divides input terminal connection and refers to 10MHz crystal oscillator, and R divides
Frequency output end is sequentially connected phase discriminator, loop filter, voltage-controlled 10.23MHz crystal oscillator, power splitter, power splitter output signal all the way,
Mixer input is connected all the way, and mixer input is also connected with 10MHz crystal oscillator, and mixer output is successively filtered through 230KHz
Device, Fractional-N frequency connect phase discriminator input terminal, and the output of voltage-controlled 10.23MHz crystal oscillator is being mixed through power splitter with 10MHz crystal oscillation signal
Device mixing, is then sent into phase discriminator through 230KHz filter and Fractional-N frequency, with the reference 10MHz divided through R for being sent into phase discriminator
Crystal oscillation signal carry out phase bit comparison, and after filtered through loop filter, feed back to voltage-controlled 10.23MHz crystal oscillator, formation is fed back to
Road, voltage-controlled 10.23MHz crystal oscillator output signal export pure 10.23MHz signal through power splitter.
Further, the phase discriminator is the extremely low phase discriminator of noise floor.
The beneficial effects of adopting the technical scheme are that
The homologous output of the utility model crystal oscillator, the stability and very high purity of output signal can provide homologous for frequency source
Reference signal.Novel with the scheme of crystal oscillator frequency conversion and phase-lock crystal oscillator, compared to traditional monocycle locking phase scheme, the phase noise of module is special
Property substantially improves on the basis of identical device.Module output phase is made an uproar better than -150dBc/Hz@100Hz, -160dBc/Hz@
1kHz, -165dBc/Hz@10kHz index.
Detailed description of the invention
Fig. 1 is the utility model schematic block circuit diagram.
Specific embodiment
Utility model is described in further detail with reference to the accompanying drawing:
For obtain 10.23MHz high-purity signal the utility model take frequency conversion and phase-lock scheme, using 10.23MHz with
10MHz is mixed out 230kHz, locking phase 230kHz.
As shown in Figure 1, the utility model includes 10MHz crystal oscillator, R frequency dividing, Fractional-N frequency, phase discriminator, loop filter and pressure
10.23MHz crystal oscillator, power splitter, frequency mixer, 230KHz filter are controlled, wherein R divides input terminal connection and refers to 10MHz crystal oscillator, R
Frequency division output terminal is sequentially connected phase discriminator, loop filter, voltage-controlled 10.23MHz crystal oscillator, power splitter, and power splitter exports letter all the way
Number, mixer input is connected all the way, and mixer input is also connected with 10MHz crystal oscillator, and mixer output is successively through 230KHz
Filter, Fractional-N frequency connect phase discriminator input terminal, and the output of voltage-controlled 10.23MHz crystal oscillator exists through power splitter and 10MHz crystal oscillation signal
Frequency mixer mixing, is then sent into phase discriminator through 230KHz filter and Fractional-N frequency, with the reference divided through R for being sent into phase discriminator
10MHz crystal oscillation signal carries out phase bit comparison, and after filtered through loop filter, feed back to voltage-controlled 10.23MHz crystal oscillator, formed anti-
It is fed back to road, voltage-controlled 10.23MHz crystal oscillator output signal exports pure 10.23MHz signal through power splitter.
In the utility model, voltage-controlled 10.23MHz crystal oscillator is voltage controlled oscillator in phaselocked loop, using single-conversion scheme, lock
Phase 230kHz improves output signal purity, realizes the homologous high-purity output of two crystal oscillators.The phase noise of module is mainly by ring
The outer two parts of interior and ring determine that the outer phase noise of ring mainly determines that phase noise is mainly made an uproar by phase discriminator in ring by two crystal oscillators
The influence of sound substrate, therefore the phase discriminator that the present invention has selected noise floor extremely low.Module output phase is made an uproar better than -150dBc/Hz@
100Hz, -160dBc/Hz@1kHz, -165dBc/Hz@10kHz index.
Claims (2)
1. frequency module when a kind of, it is characterised in that: including 10MHz crystal oscillator, R frequency dividing, Fractional-N frequency, phase discriminator, loop filter and
Voltage-controlled 10.23MHz crystal oscillator, power splitter, frequency mixer, 230KHz filter, wherein R divides input terminal connection and refers to 10MHz crystal oscillator,
R frequency division output terminal is sequentially connected phase discriminator, loop filter, voltage-controlled 10.23MHz crystal oscillator, power splitter, and power splitter exports letter all the way
Number, mixer input is connected all the way, and mixer input is also connected with 10MHz crystal oscillator, and mixer output is successively through 230KHz
Filter, Fractional-N frequency connect phase discriminator input terminal, and the output of voltage-controlled 10.23MHz crystal oscillator exists through power splitter and 10MHz crystal oscillation signal
Frequency mixer mixing, is then sent into phase discriminator through 230KHz filter and Fractional-N frequency, with the reference divided through R for being sent into phase discriminator
10MHz crystal oscillation signal carries out phase bit comparison, and after filtered through loop filter, feed back to voltage-controlled 10.23MHz crystal oscillator, formed anti-
It is fed back to road, voltage-controlled 10.23MHz crystal oscillator output signal exports pure 10.23MHz signal through power splitter.
2. frequency module when according to claim 1, it is characterised in that: the phase discriminator is the extremely low phase demodulation of noise floor
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821242003.6U CN208190632U (en) | 2018-08-03 | 2018-08-03 | When frequency module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821242003.6U CN208190632U (en) | 2018-08-03 | 2018-08-03 | When frequency module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208190632U true CN208190632U (en) | 2018-12-04 |
Family
ID=64428252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821242003.6U Expired - Fee Related CN208190632U (en) | 2018-08-03 | 2018-08-03 | When frequency module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208190632U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868208A (en) * | 2019-12-11 | 2020-03-06 | 重庆会凌电子新技术有限公司 | Frequency synthesizer |
-
2018
- 2018-08-03 CN CN201821242003.6U patent/CN208190632U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868208A (en) * | 2019-12-11 | 2020-03-06 | 重庆会凌电子新技术有限公司 | Frequency synthesizer |
| CN110868208B (en) * | 2019-12-11 | 2023-10-03 | 重庆会凌电子新技术有限公司 | frequency synthesizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103490777B (en) | low spurious frequency synthesizer | |
| CN104202048B (en) | Broadband totally-integrated phase-locked loop frequency synthesizer | |
| CN105187060B (en) | The phase-locked loop circuit and its implementation of a kind of low phase noise | |
| CN104135280A (en) | Frequency source circuit with harmonic generation and frequency mixing | |
| CN102487285B (en) | Radio communication device | |
| CN105375922B (en) | A kind of microwave signal source for miniature atomic clock | |
| CN101136631B (en) | Frequency synthesizer and frequency synthesis method | |
| CN204633753U (en) | Based on HMC835 broadband Low phase noise low spurious frequency hopping synthesizer | |
| CN108055035A (en) | A kind of wideband frequency expanding unit of optical-electronic oscillator | |
| CN201541235U (en) | Microwave signal source module | |
| CN208190632U (en) | When frequency module | |
| CN201860317U (en) | Low-noise wideband hopping frequency synthesizer | |
| CN208386518U (en) | The small stepping Low phase noise frequency source of X-band | |
| CN202475398U (en) | Ultra-low phase noise reference signal generating device used for frequency synthesizer | |
| CN102340308B (en) | Fractional-N frequency synthesizer | |
| CN202998066U (en) | Low-noise and fast-switch frequency synthesizer | |
| CN203219288U (en) | Three-level superheterodyne receiver and local oscillation circuit thereof | |
| CN204376873U (en) | For wireless frequency synthesizer | |
| CN208316704U (en) | A kind of C-band radar high stable high isolation multiple signals source circuit | |
| CN104410409A (en) | Self-adaptive multi-clock production device and method | |
| CN203352563U (en) | Low-phase noise frequency synthesizer | |
| CN202475405U (en) | Audio receiver, portable equipment with same, and audio communication system | |
| CN213637720U (en) | Ultra-wideband fine stepping fast frequency hopping source | |
| CN204615807U (en) | A kind of digital phase-locked frequency multiplier device | |
| CN109067395A (en) | A kind of Phase synchronization Low phase noise Phase locking frequency synthesis device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181204 Termination date: 20210803 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |