CN104682873A - Ultra-wide-octave voltage controlled oscillator (VCO) - Google Patents
Ultra-wide-octave voltage controlled oscillator (VCO) Download PDFInfo
- Publication number
- CN104682873A CN104682873A CN201310613924.4A CN201310613924A CN104682873A CN 104682873 A CN104682873 A CN 104682873A CN 201310613924 A CN201310613924 A CN 201310613924A CN 104682873 A CN104682873 A CN 104682873A
- Authority
- CN
- China
- Prior art keywords
- vco
- voltage controlled
- controlled oscillator
- frequency
- high band
- 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.)
- Pending
Links
Abstract
The invention relates to the field of frequency synthesis, in particular to an ultra-wide-octave voltage controlled oscillator (VCO). In the technical scheme of the ultra-wide-octave VCO, a variable voltage source VT is externally input to the VCO; the VCO outputs a corresponding frequency to a Mix; meanwhile, a fixed frequency oscillator (OSC) outputs a preset fixed frequency signal to the Mix; the Mix outputs a to-be-filtered signal formed by mixing a sum frequency signal and a difference frequency signal of a high-band VCO and the OSC after frequency mixing; and at last, an LPF (Low Pass Filter) filters the sum frequency signal, and only outputs the difference frequency signal. The frequency output of the VCO covers a wide band; the output range of the VCO can be changed by changing the output of the OSC and the pass band range of the corresponding LPF; the output frequency of the VCO is flexibly variable; a circuit is simple in structure and easy to implement; and the system complexity is low.
Description
Technical field
The present invention relates to frequency synthesis field, be specifically related to a kind of ultra-wide octave voltage controlled oscillator (Voltage Controlled Oscillator, VCO).
Background technology
Ultra wide band frequency source has been widely used in communication, observing and controlling, radar, electronic countermeasures and other electronic systems, becomes indispensable core component.The VCO of ultra broadband, high-performance, miniaturization is tuning in order to the fast frequency realizing frequency synthesizer as adjustable signal generator, is the critical component in ultra wide band frequency source.At present, ultra broadband VCO mostly divides through frequency range, adopts multiple VCO to switch to realize ultra broadband, but this method increases the complexity of system, not easily realize, and frequency sweep output spectrum is discontinuous in segmentation place.Therefore, how function admirable is provided, reliable and stable one-part form ultra-wide octave voltage controlled oscillator becomes an important subject.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is to provide a kind of one-part form ultra-wide octave voltage controlled oscillator, and the frequency range requiring it that current ultra-wide octave voltage controlled oscillator can be avoided to adopt divides, many VCO switch implementation.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of ultra-wide octave voltage controlled oscillator, described ultra-wide octave voltage controlled oscillator comprises: high band voltage controlled oscillator VCO, fixed oscillator OSC, frequency mixer Mix and low pass filter LPF; Wherein,
Described high band voltage controlled oscillator VCO is for receiving the variable voltage source V of outside input
t, described variable voltage source V
tcontrol the variable capacitance in high band voltage controlled oscillator VCO resonant tank, realize voltage-frequency conversion, obtain corresponding frequency f by high band voltage controlled oscillator VCO
vand export;
Described fixed oscillator OSC is used for rate-adaptive pacemaker scope required by ultra-wide octave voltage controlled oscillator and the intrinsic frequency-tuning range of high band voltage controlled oscillator VCO, determines default fixed frequency signal f
cand export;
Described frequency mixer Mix is for receiving the frequency signal from high band voltage controlled oscillator VCO and fixed oscillator OSC, mixing is carried out to the two, obtains by the signal to be filtered mixed with frequency signal and slip frequency signal of high band voltage controlled oscillator VCO and fixed oscillator OSC;
Described low pass filter LPF is used for carrying out filtering operation to described signal to be filtered, by filtering with frequency signal of high band voltage controlled oscillator VCO wherein and fixed oscillator OSC, select the slip frequency signal exporting high band voltage controlled oscillator VCO and fixed oscillator OSC, complete the implementation procedure of ultra-wide octave VCO.
(3) beneficial effect
In technical solution of the present invention, outside input variable voltage source V
tto VCO, VCO exports corresponding frequency to Mix, OSC exports and presets fixed frequency signal to Mix simultaneously, export by the signal to be filtered mixed with frequency signal and slip frequency signal of high band voltage controlled oscillator VCO and fixed oscillator OSC after Mix mixing, last LPF filters and frequency signal, an output difference frequency signal.
The rate-adaptive pacemaker covering frequency range of this voltage controlled oscillator is wide, the free transmission range changing the output of fixed oscillator and the low pass filter of correspondence can change the output area of voltage controlled oscillator, the output frequency flexibility and changeability of voltage controlled oscillator, circuit structure is simple and be easy to realize, and system complexity is low.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of ultra-wide octave voltage controlled oscillator of the present invention.
Fig. 2 is the flow chart realizing ultra-wide octave VCO in technical solution of the present invention implementation process.
Fig. 3 is the schematic diagram of technical solution of the present invention implementation process.
Embodiment
For making object of the present invention, content and advantage clearly, below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.
The resonant tank of LC oscillator is generally made up of the fixed value inductance of high quality factor (Q value) and variable capacitance (variable capacitance diode), but under normal circumstances, in practical implementation the capacitance of variable capacitance and excursion all less.The output frequency of requirement oscillator is f
c, by resonant frequency equation
known, the inductance of higher value and the electric capacity of smaller value should be selected to realize.
Can be obtained by resonant frequency equation
for the VCO that design frequency excursion is larger, all less electric capacity of the inductance of higher value and corresponding capacitance and excursion thereof should be selected to realize.But current integrated circuit technology does not realize the large inductance value inductance of high q-factor, and the Q value of LC resonant tank mainly affects by the Q value of inductance, is therefore difficult to the voltage controlled oscillator realizing ultra-wide octave.
Adopt microstrip line can obtain the low value inductance of high q-factor, coordinate and select the electric capacity that capacitance and excursion thereof are all less, can obtain high band voltage controlled oscillator like this, its frequency values is higher and absolute bandwidth is all wider.Based on this, the invention provides one-part form ultra-wide octave voltage controlled oscillator, as shown in Figure 1, mainly comprise high band voltage controlled oscillator (VCO), fixed oscillator (OSC), frequency mixer (Mix) and low pass filter (LPF), above four parts are equivalent to a ultra-wide octave voltage controlled oscillator; Wherein,
V
tfor outside input variable voltage source, for regulating the bias voltage of variable capacitance (variable capacitance diode) in high band voltage controlled oscillator VCO resonant tank;
Described high band voltage controlled oscillator VCO a kind ofly to be controlled by additional variable voltage source with the signal generator producing corresponding frequencies, i.e. voltage-frequency (V-F) change-over circuit, and its corresponding relation is generally linear math relation; Described high band voltage controlled oscillator VCO is for receiving the variable voltage source V of outside input
t, described variable voltage source V
tcontrol the variable capacitance in high band voltage controlled oscillator VCO resonant tank, realize voltage-frequency conversion, obtain corresponding frequency f by high band voltage controlled oscillator VCO
vand export;
Described fixed oscillator OSC is used for rate-adaptive pacemaker scope required by ultra-wide octave voltage controlled oscillator and the intrinsic frequency-tuning range of high band voltage controlled oscillator VCO, determines default fixed frequency signal f
cand export;
Described frequency mixer Mix is for receiving the frequency signal from high band voltage controlled oscillator VCO and fixed oscillator OSC, mixing is carried out to the two, obtains by the signal to be filtered mixed with frequency signal and slip frequency signal of high band voltage controlled oscillator VCO and fixed oscillator OSC;
Described low pass filter LPF is used for carrying out filtering operation to described signal to be filtered, by filtering with frequency signal of high band voltage controlled oscillator VCO wherein and fixed oscillator OSC, select the slip frequency signal exporting high band voltage controlled oscillator VCO and fixed oscillator OSC, complete the implementation procedure of ultra-wide octave VCO.
As shown in Figure 2, for realizing the flow chart of ultra-wide octave VCO in technical solution of the present invention implementation process, specifically comprise:
Step S1: outside input variable voltage source V
tparamount frequency range voltage controlled oscillator VCO, controls the variable capacitance in high band voltage controlled oscillator VCO resonant tank, and realize voltage-frequency conversion, high band voltage controlled oscillator VCO obtains corresponding frequency f
vand export;
Step S2: fixed oscillator OSC rate-adaptive pacemaker scope required by ultra-wide octave voltage controlled oscillator and the intrinsic frequency-tuning range of high band voltage controlled oscillator VCO, determine default fixed frequency signal f
cand export;
Step S3: frequency mixer Mix receives the frequency signal from high band voltage controlled oscillator VCO and fixed oscillator OSC, mixing is carried out to the two, obtains by the signal to be filtered mixed with frequency signal and slip frequency signal of high band voltage controlled oscillator VCO and fixed oscillator OSC;
Step S4: low pass filter LPF carries out filtering operation to described signal to be filtered, by filtering with frequency signal of high band voltage controlled oscillator VCO wherein and fixed oscillator OSC, select the slip frequency signal exporting high band voltage controlled oscillator VCO and fixed oscillator OSC, complete the implementation procedure of ultra-wide octave VCO.
As shown in Figure 3, illustrating for said process.
Wherein, f
vfor the frequency corresponding to the signal output of VCO, f
cfor the frequency corresponding to the signal output of OSC, t is the time.
First, outside input variable voltage source V
tcos2 Π f is exported to VCO, VCO
vt to Mix, OSC exports Cos2 Π f simultaneously
cexport after t to Mix, Mix mixing by high band voltage controlled oscillator VCO and fixed oscillator OSC with frequency signal Cos2 Π (f
v+ f
c) t and slip frequency signal Cos2 Π (f
v-f
c) signal to be filtered that t mixes, last LPF filters and frequency signal Cos2 Π (f
v+ f
c) t, an output difference frequency signal Cos2 Π (f
v-f
c) t.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment
The VCO of the ultra-wide octave being 0.1GHz ~ 2GHz for design frequency scope analyzes, and each several part needed for concrete enforcement is as follows:
1. the frequency range choosing high band VCO is 2GHz ~ 4GHz, and it is 0.56nH that rough calculation can obtain fixed value inductance, and corresponding capacitance variations scope is 2.83pF ~ 1.26pF;
2. choose the fixed oscillator of 2GHz;
3. mixing and filtering obtain the rate-adaptive pacemaker of 0.1GHz ~ 2GHz.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (1)
1. a ultra-wide octave voltage controlled oscillator, is characterized in that, described ultra-wide octave voltage controlled oscillator comprises: high band voltage controlled oscillator (VCO), fixed oscillator (OSC), frequency mixer (Mix) and low pass filter (LPF); Wherein,
Described high band voltage controlled oscillator (VCO) is for receiving the variable voltage source V of outside input
t, described variable voltage source V
tcontrol the variable capacitance in high band voltage controlled oscillator (VCO) resonant tank, realize voltage-frequency conversion, obtain corresponding frequency f by high band voltage controlled oscillator (VCO)
vand export;
Described fixed oscillator (OSC), for the rate-adaptive pacemaker scope required by ultra-wide octave voltage controlled oscillator and the intrinsic frequency-tuning range of high band voltage controlled oscillator (VCO), determines default fixed frequency signal f
cand export;
Described frequency mixer (Mix) is for receiving the frequency signal from high band voltage controlled oscillator (VCO) and fixed oscillator (OSC), mixing is carried out to the two, obtains by the signal to be filtered mixed with frequency signal and slip frequency signal of high band voltage controlled oscillator (VCO) and fixed oscillator (OSC);
Described low pass filter (LPF) is for carrying out filtering operation to described signal to be filtered, by filtering with frequency signal of high band voltage controlled oscillator (VCO) wherein and fixed oscillator (OSC), select the slip frequency signal exporting high band voltage controlled oscillator (VCO) and fixed oscillator (OSC), complete the implementation procedure of ultra-wide octave VCO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613924.4A CN104682873A (en) | 2013-11-27 | 2013-11-27 | Ultra-wide-octave voltage controlled oscillator (VCO) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613924.4A CN104682873A (en) | 2013-11-27 | 2013-11-27 | Ultra-wide-octave voltage controlled oscillator (VCO) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104682873A true CN104682873A (en) | 2015-06-03 |
Family
ID=53317541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310613924.4A Pending CN104682873A (en) | 2013-11-27 | 2013-11-27 | Ultra-wide-octave voltage controlled oscillator (VCO) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104682873A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080272851A1 (en) * | 2007-05-04 | 2008-11-06 | Mediatek Inc. | LC voltage controlled oscillator with tunable capacitance unit |
| CN201491001U (en) * | 2008-12-23 | 2010-05-26 | 重庆会凌电子新技术有限公司 | Circuit used for making ultra wide band voltage-controlled oscillator |
| CN203722605U (en) * | 2013-08-07 | 2014-07-16 | 天津正铖科技有限公司 | Integrated ultra wide band voltage-controlled oscillator |
-
2013
- 2013-11-27 CN CN201310613924.4A patent/CN104682873A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080272851A1 (en) * | 2007-05-04 | 2008-11-06 | Mediatek Inc. | LC voltage controlled oscillator with tunable capacitance unit |
| CN201491001U (en) * | 2008-12-23 | 2010-05-26 | 重庆会凌电子新技术有限公司 | Circuit used for making ultra wide band voltage-controlled oscillator |
| CN203722605U (en) * | 2013-08-07 | 2014-07-16 | 天津正铖科技有限公司 | Integrated ultra wide band voltage-controlled oscillator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102201789B (en) | LNB (low noise block) down-conversion chip circuit and LNB down-conversion chip as well as LNB down-conversion circuit and method | |
| CN103490777B (en) | low spurious frequency synthesizer | |
| CN105071804B (en) | A kind of Low phase noise broadband microwave local oscillator source circuit and its implementation method | |
| CN105245224B (en) | A kind of low phase noise microwave local oscillation generating means and method | |
| CN105978562B (en) | Super Low phase noise and the high-frequency narrow-band of ultra-high frequency resolution ratio synthesis source circuit and method | |
| CN105375922B (en) | A kind of microwave signal source for miniature atomic clock | |
| CN104378110A (en) | Frequency sweeping signal generating circuit | |
| CN108988857A (en) | A kind of broadband low phase noise frequency synthesizer and method based on optical-electronic oscillator | |
| CN106452433A (en) | Frequency synthesizer | |
| CN108055035A (en) | A kind of wideband frequency expanding unit of optical-electronic oscillator | |
| CN105262486A (en) | X wave band frequency synthesizer | |
| CN108933597A (en) | A kind of thin step frequency synthesizer of broadband Low phase noise and frequency combining method | |
| CN102751983B (en) | Multi-loop synthesized local oscillation device of TD-LTE (time division-long term evolution) comprehensive test instrument | |
| CN110289858A (en) | A kind of thin stepping frequency agility collaboration system in broadband | |
| CN104300977A (en) | Low-phase-noise high-speed frequency synthesizing system | |
| CN103618546A (en) | Ultra wide octave voltage-controlled oscillation realizing method | |
| CN205986861U (en) | Frequency hopping circuit is advanced in ultra wide band small step | |
| CN202978896U (en) | Combined broadband rapid frequency hopping source | |
| CN106209089A (en) | A kind of single loop frequency division type broadband frequency synthesizer of phase locking | |
| CN205647494U (en) | Ultra wide band low phase noise hangs down stray frequency synthesizer | |
| CN105356878B (en) | A kind of implementation method and device of improved tricyclic wideband frequency synthesizer | |
| CN208445546U (en) | A kind of broadband low phase noise frequency synthesizer based on optical-electronic oscillator | |
| CN116647232A (en) | Frequency source synthesis circuit for improving frequency hopping time | |
| CN201479116U (en) | Combined frequency hopping synthesizer | |
| CN203872134U (en) | Ultra wide octave voltage-controlled oscillator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |