CN208079045U - A kind of Sweep Source - Google Patents
A kind of Sweep Source Download PDFInfo
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- CN208079045U CN208079045U CN201821124104.3U CN201821124104U CN208079045U CN 208079045 U CN208079045 U CN 208079045U CN 201821124104 U CN201821124104 U CN 201821124104U CN 208079045 U CN208079045 U CN 208079045U
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- frequency
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- direct digital
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Abstract
The utility model discloses a kind of Sweep Sources,Including frequency multiplier,First filter,Direct Digital Synthesizer,Second filter,Phase-locked loop circuit,Amplifier,The frequency multiplier connects first filter,First filter connects Direct Digital Synthesizer,The Direct Digital Synthesizer connects phase-locked loop circuit,The phase-locked loop circuit connects amplifier,The reference signal of input is subjected to frequency multiplication by frequency multiplier,First filter will be input to Direct Digital Synthesizer after the signal filtering after frequency multiplication,Direct Digital Synthesizer gives frequency signal to phase-locked loop circuit after second filter filters,Signal is formed the broadband of 12G~16G through amplifier again after phase-locked loop circuit,Low phase noise,The swept-frequency signal of high linearity,Since swept bandwidth is wide,Phase noise is low,The features such as sweep linearity is high,It can be used for high-precision,Remote object detection.
Description
Technical field
The utility model belongs to signal source equipment technical field, more particularly to a kind of Sweep Source.
Background technology
It is more and more wider with field for Sweep Source with the rapid development of electronic information technology, therefore to Sweep Source
Demand is also just higher and higher, and present Sweep Source performance is poor, stability is relatively low, cannot meet current needs.Such as：China
Patent application 201120169496.7 discloses a kind of Sweep Source signal source circuit, which includes a kind of " swept signal source electricity
Road, including transformer, rectifying and voltage-stabilizing module, reverser, optocoupler, IGBT, it is characterised in that 220V AC powers by transformer,
It is used as signal source current, the control signal of microcontroller output so that optocoupler is connected after reverser is reversed after rectifying and voltage-stabilizing module,
With this first IGBT turning on and off to the 4th IGBT is driven, required spy is formed by turning on and off for IGBT
Determine frequency and waveform ".
Swept-frequency signal is wherein obtained using IGBT, since IGBT working frequencies itself are low, lacking there are parasitic thyristor
Point, leads to that swept signal source noiseproof feature is poor, stability is low.
Therefore, how solve the above problems the emphasis studied as those skilled in the art.
Utility model content
The purpose of this utility model is just to provide a kind of Sweep Source, can effectively solve the above-mentioned frequency sweep for being difficult to obtain high quality
The shortcoming in source.
The purpose of this utility model is realized by following technical proposals：
A kind of Sweep Source, including external reference circuit (1), × 32 frequency multiplier, first filter, direct digital frequency synthesier
Device, second filter, phase discriminator, loop filter, voltage controlled oscillator, amplifier and feedback divider, the external reference circuit
Connect × 32 frequency multipliers, it is described × 32 frequency multiplier connect first filter, the first filter connects Direct Digital frequency
Synthesizer, the Direct Digital Synthesizer connect second filter, and the second filter connects phase discriminator, the mirror
Phase device linkloop filter, the loop filter connect voltage controlled oscillator, and the voltage controlled oscillator connects amplifier, described
Feedback divider connects phase discriminator and voltage controlled oscillator.
Preferably, described × 32 the input signal of frequency multiplier the reference signal of 100MHz is provided by external reference circuit.
Preferably, the Direct Digital Synthesizer output frequency signal 250M~335MHz.
Preferably, the second filter output phase demodulation frequency is 250M~335MHz.
Preferably, the phase discriminator exports burning voltage, phase demodulation frequency is 250M~335MHz, output voltage and feedback
Frequency dependence, feedback frequency range are 12G~16GHz, and phase discriminator output voltage range is in 0~5V.
Preferably, it is 1~11V that the loop filter, which exports voltage-controlled voltage range,.
Preferably, the voltage controlled oscillator reference frequency output is 12G~16GHz.
Preferably, the feedback divider is to phase discriminator input feedback signal, the frequency dividing multiple of feedback divider is 48.
Preferably, described × 32 frequency multipliers, Direct Digital Synthesizer connect power supply control with amplifier, it powers
By external input 6V and 12V, voltage stabilizing exports 3.3V, 1.8V and 11.5V and supplies each device for control, and power supply control uses MCU, control
Direct Digital Synthesizer processed.
Compared with prior art, the beneficial effects of the utility model are：
The utility model is using Direct Digital frequency and grows up to be a useful person in conjunction with phase-locked loop circuit so that this Sweep Source, which has, to be differentiated
Rate is high, frequency switching time is short, can stablize the swept-frequency signal for generating high quality, and it is at low cost, be easy to make, be small,
It is light-weight.
Description of the drawings
Fig. 1 is the circuit structure diagram of the utility model；
Fig. 2 is phase-locked loop circuit.
Reference sign：1- external reference circuits, the frequency multipliers of 2- × 32,3- first filters, 4- Direct Digital frequencies
Synthesizer, 5- second filters, 6- phase discriminators, 7- loop filters, 8- voltage controlled oscillators, 9- amplifiers, 10- feedback divisions
Device, 11- power supply controls.
Specific implementation mode
The utility model is further described with reference to specific embodiments and the drawings.
Embodiment one
As shown in Figure 1 to Figure 2, a kind of Sweep Source, including it is external reference circuit 1, × 32 frequency multiplier 2, first filter 3, straight
Connect digital frequency synthesizer 4, second filter 5, phase discriminator 6, loop filter 7, voltage controlled oscillator 8, amplifier 9, feedback
Frequency divider 10, it is described × 32 frequency multiplier input signal by external reference circuit provide 100MHz reference signal, the direct number
Word formula frequency synthesizer output frequency signal 250M~335MHz, the second filter output phase demodulation frequency be 250M~
335MHz, the phase discriminator phase demodulation frequency are 250M~335MHz, and output voltage is related to feedback frequency, and feedback frequency range is
12G~16GHz, for phase discriminator output voltage range in 0~5V, it is 1~11V that the loop filter, which exports voltage-controlled voltage range,
The voltage controlled oscillator reference frequency output is 12G~16GHz, and the feedback divider is to phase discriminator input feedback signal, instead
Present frequency divider frequency dividing multiple be 48, the external reference circuit 1 connect × 32 frequency multipliers 2, it is described × 32 frequency multiplier 2 connection first
Filter 3, the first filter 3 connect Direct Digital Synthesizer 4, and the Direct Digital Synthesizer 4 connects
Second filter 5 is connect, the second filter 5 connects phase discriminator 6,6 linkloop filter 7 of the phase discriminator, the loop
Filter 7 connects voltage controlled oscillator 8, and the voltage controlled oscillator 8 connects amplifier 9, and the feedback divider 10 connects phase discriminator
6 and 8, × 32 frequency multiplier 2 of voltage controlled oscillator by the reference signal received from external reference circuit 1 carry out frequency multiplication, first filter 3
The signal received from × 32 frequency multipliers 2 is filtered (filter parameter：Centre frequency 3.2GHz, bandwidth 20M, loss
It is more than 60dB better than 3.5dB, Out-of-band rejection@f0 ± 50M), Direct Digital Synthesizer 4 will receive from first filter 3
Signal synthesized frequency signal (the signal frequency range arrived:3.2G points frequency), second filter 5 will from Direct Digital frequency and at
The signal that device 4 receives is filtered (filter parameter:The bandpass filter of 250M~335M, loss is better than 2dB, with outer suppression
@f0 ± 100M processed are more than 50dB).Signal by second filter 5 enters the phase discriminator 6 of phaselocked loop, the signal of phase discriminator 6
Pass through loop filter 7 again, voltage controlled oscillator 8,8 output signal of voltage controlled oscillator are entered back by the signal of loop filter 7
It is divided into two-way, enters feedback divider 10 all the way, phase discriminator 6 is inputted after frequency dividing and the reference of phaselocked loop carries out phase demodulation, another way
Swept-frequency signal is then exported into amplifier 9.
In the present embodiment, the output frequency sweep frequency that can be stablized using Direct Digital Synthesizer combination phase-locked loop circuit
Rate bandwidth (2G-20G), the frequency spectrum of low phase noise (- 93dBc/Hz@1k@16G).
Embodiment two
As shown in Figure 1 to Figure 2, a kind of Sweep Source, including it is external reference circuit 1, × 32 frequency multiplier 2, first filter 3, straight
Connect digital frequency synthesizer 4, second filter 5, phase discriminator 6, loop filter 7, voltage controlled oscillator 8, amplifier 9, feedback
Frequency divider 10, it is described × 32 frequency multiplier input signal by external reference circuit provide 100MHz reference signal, the direct number
Word formula frequency synthesizer output frequency signal 250M~335MHz, the second filter output phase demodulation frequency be 250M~
335MHz, the phase discriminator phase demodulation frequency are 250M~335MHz, and output voltage is related to feedback frequency, and feedback frequency range is
12G~16GHz, for phase discriminator output voltage range in 0~5V, it is 1~11V that the loop filter, which exports voltage-controlled voltage range,
The voltage controlled oscillator reference frequency output is 12G~16GHz, and the feedback divider is to phase discriminator input feedback signal, instead
Present frequency divider frequency dividing multiple be 48, the external reference circuit 1 connect × 32 frequency multipliers 2, it is described × 32 frequency multiplier 2 connection first
Filter 3, the first filter 3 connect Direct Digital Synthesizer 4, and the Direct Digital Synthesizer 4 connects
Second filter 5 is connect, the second filter 5 connects phase discriminator 6,6 linkloop filter 7 of the phase discriminator, the loop
Filter 7 connects voltage controlled oscillator 8, and the voltage controlled oscillator 8 connects amplifier 9, and the feedback divider 10 connects phase discriminator
6 and 8, × 32 frequency multiplier 2 of voltage controlled oscillator by the reference signal received from external reference circuit 1 carry out frequency multiplication, first filter 3
The 100MHz signals received from × 32 frequency multipliers 2 are filtered (filter parameter：Centre frequency 3.2GHz, bandwidth are
20M, loss are better than 3.5dB, and Out-of-band rejection@f0 ± 50M are more than 60dB), Direct Digital Synthesizer 4 will be from the first filtering
Signal synthesized frequency signal (the signal frequency range that device 3 receives：3.2G points frequency), second filter 5 will be from Direct Digital
Frequency and the signal that 4 receive of growing up to be a useful person are filtered (filter parameter:The bandpass filter of 250M~335M, loss are better than
2dB, Out-of-band rejection@f0 ± 100M are more than 50dB) phase demodulation frequency is exported, the phase discriminator 6 that phase demodulation frequency enters phaselocked loop exports surely
Constant voltage, burning voltage export voltage-controlled voltage by loop filter 7 again, and voltage-controlled voltage enters back into voltage controlled oscillator 8, voltage-controlled to shake
Swing 8 output signal of device and be divided into two-way, enter feedback divider 10 all the way, after frequency dividing the reference of input phase discriminator 6 and phaselocked loop into
Row phase demodulation, another way enter amplifier 9 and then export swept-frequency signal.
In the present embodiment, it is used as using the signal of 100MHz and refers to signal, it is easier to generate the swept-frequency signal of Low phase noise sound.
Embodiment three
As shown in Figure 1 to Figure 2, a kind of Sweep Source, including it is external reference circuit 1, × 32 frequency multiplier 2, first filter 3, straight
Connect digital frequency synthesizer 4, second filter 5, phase discriminator 6, loop filter 7, voltage controlled oscillator 8, amplifier 9, feedback
Frequency divider 10, it is described × 32 frequency multiplier input signal by external reference circuit provide 100MHz reference signal, the direct number
Word formula frequency synthesizer output frequency signal 250M~335MHz, the second filter output phase demodulation frequency be 250M~
335MHz, the phase discriminator phase demodulation frequency are 250M~335MHz, and output voltage is related to feedback frequency, and feedback frequency range is
12G~16GHz, for phase discriminator output voltage range in 0~5V, it is 1~11V that the loop filter, which exports voltage-controlled voltage range,
The voltage controlled oscillator reference frequency output is 12G~16GHz, and the feedback divider is to phase discriminator input feedback signal, instead
Present frequency divider frequency dividing multiple be 48, the external reference circuit 1 connect × 32 frequency multipliers 2, it is described × 32 frequency multiplier 2 connection first
Filter 3, the first filter 3 connect Direct Digital Synthesizer 4, and the Direct Digital Synthesizer 4 connects
Second filter 5 is connect, the second filter 5 connects phase discriminator 6,6 linkloop filter 7 of the phase discriminator, the loop
Filter 7 connects voltage controlled oscillator 8, and the voltage controlled oscillator 8 connects amplifier 9, and the feedback divider 10 connects phase discriminator
6 and 8, × 32 frequency multiplier 2 of voltage controlled oscillator by the reference signal received from external reference circuit 1 carry out frequency multiplication, first filter 3
The signal received from × 32 frequency multipliers 2 is filtered (filter parameter：Centre frequency 3.2GHz, bandwidth 20M, loss
It is more than 60dB better than 3.5dB, Out-of-band rejection@f0 ± 50M), Direct Digital Synthesizer 4 will receive from first filter 3
Signal synthesized frequency signal (the signal frequency range arrived：3.2G points frequency), second filter 5 will from Direct Digital frequency and at
The signal that device 4 receives is filtered (filter parameter:The bandpass filter of 250M~335M, loss is better than 2dB, with outer suppression
@f0 ± 100M processed are more than 50dB).Signal by second filter 5 enters the phase discriminator 6 of phaselocked loop, the signal of phase discriminator 6
Pass through loop filter 7 again, voltage controlled oscillator 8,8 output signal of voltage controlled oscillator are entered back by the signal of loop filter 7
It is divided into two-way, enters feedback divider 10 all the way, phase discriminator 6 is inputted after frequency dividing and the reference of phaselocked loop carries out phase demodulation, another way
Swept-frequency signal is then exported into amplifier 9, wherein × 32 frequency multiplier, Direct Digital Synthesizer and amplifier are by powering
Control provides power supply signal, and power supply control exports 3.3V, 1.8V and 11.5V and supply each device by external input 6V and 12V, voltage stabilizing
Part, control control use MCU, control Direct Digital Synthesizer.
In the present embodiment, electric power is provided using power supply control, can ensure the power supply capacity of this frequency source conveniently, safely.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (9)
1. a kind of Sweep Source, it is characterised in that：Including external reference circuit (1), × 32 frequency multiplier (2), first filter (3), straight
It connects digital frequency synthesizer (4), second filter (5), phase discriminator (6), loop filter (7), voltage controlled oscillator (8), put
Big device (9) and feedback divider (10), external reference circuit (1) × 32 frequency multipliers of connection (2), described × 32 frequency multiplier (2)
Connect first filter (3), first filter (3) the connection Direct Digital Synthesizer (4), the Direct Digital
Frequency synthesizer (4) connects second filter (5), and second filter (5) the connection phase discriminator (6), the phase discriminator (6) is even
Connect loop filter (7), loop filter (7) the connection voltage controlled oscillator (8), voltage controlled oscillator (8) the connection amplification
Device (9), feedback divider (10) the connection phase discriminator (6) and voltage controlled oscillator (8).
2. a kind of Sweep Source according to claim 1, it is characterised in that：It is described × 32 frequency multiplier (2) input signal by
External reference circuit (1) provides the reference signal of 100MHz.
3. a kind of Sweep Source according to claim 1, it is characterised in that：The Direct Digital Synthesizer (4) is defeated
Go out frequency 250M~335MHz signals.
4. a kind of Sweep Source according to claim 1, it is characterised in that：The second filter (5) exports phase demodulation frequency
For 250M~335MHz.
5. a kind of Sweep Source according to claim 1, it is characterised in that：The phase discriminator (6) exports burning voltage, phase demodulation
Frequency is 250M~335MHz, and output voltage is related to feedback frequency, and feedback frequency range is 12G~16GHz, phase discriminator output
Voltage range is in 0~5V.
6. a kind of Sweep Source according to claim 1, it is characterised in that：The loop filter (7) exports voltage-controlled voltage
Ranging from 1~11V.
7. a kind of Sweep Source according to claim 1, it is characterised in that：Voltage controlled oscillator (8) reference frequency output
For 12G~16GHz.
8. a kind of Sweep Source according to claim 1, it is characterised in that：The feedback divider (10) is to phase discriminator (6)
The frequency dividing multiple of input feedback signal, feedback divider (10) is 48.
9. a kind of Sweep Source according to claim 1, it is characterised in that：Described × 32 frequency multiplier (2), Direct Digital frequency
Rate synthesizer (4) and amplifier (9) connection power supply control (11), power supply control pass through external input 6V and 12V, voltage stabilizing output
3.3V, 1.8V and 11.5V supply each device, and power supply control uses MCU, controls Direct Digital Synthesizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821124104.3U CN208079045U (en) | 2018-07-16 | 2018-07-16 | A kind of Sweep Source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821124104.3U CN208079045U (en) | 2018-07-16 | 2018-07-16 | A kind of Sweep Source |
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| Publication Number | Publication Date |
|---|---|
| CN208079045U true CN208079045U (en) | 2018-11-09 |
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ID=64046008
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821124104.3U Active CN208079045U (en) | 2018-07-16 | 2018-07-16 | A kind of Sweep Source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471806A (en) * | 2021-07-09 | 2021-10-01 | 电子科技大学中山学院 | Multi-feedback laser stepping frequency sweep driving device and method |
| CN117154520A (en) * | 2023-10-31 | 2023-12-01 | 光越科技(深圳)有限公司 | Sweep frequency laser generating device and sweep frequency optical coherence tomography system |
-
2018
- 2018-07-16 CN CN201821124104.3U patent/CN208079045U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113471806A (en) * | 2021-07-09 | 2021-10-01 | 电子科技大学中山学院 | Multi-feedback laser stepping frequency sweep driving device and method |
| CN117154520A (en) * | 2023-10-31 | 2023-12-01 | 光越科技(深圳)有限公司 | Sweep frequency laser generating device and sweep frequency optical coherence tomography system |
| CN117154520B (en) * | 2023-10-31 | 2023-12-29 | 光越科技(深圳)有限公司 | Sweep frequency laser generating device and sweep frequency optical coherence tomography system |
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