CN203872134U - Ultra wide octave voltage-controlled oscillator - Google Patents
Ultra wide octave voltage-controlled oscillator Download PDFInfo
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- CN203872134U CN203872134U CN201320756060.7U CN201320756060U CN203872134U CN 203872134 U CN203872134 U CN 203872134U CN 201320756060 U CN201320756060 U CN 201320756060U CN 203872134 U CN203872134 U CN 203872134U
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- Prior art keywords
- controlled oscillator
- frequency
- vco
- voltage controlled
- high band
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Abstract
The utility model relates to the field of frequency synthesis, in particular to an ultra wide octave voltage-controlled oscillator. According to the technical scheme of the ultra octave voltage-controlled oscillator, a variable voltage source VT is input to a VCO body from the outside, the VCO outputs corresponding frequency to a Mix, an OSC outputs preset fixed frequency signals to the Mix, the Mix outputs signals, to be filtered, formed by mixing the frequency signal of a high-frequency VCO, the frequency signal of a fixed oscillator (OSC) and differential frequency signals, and finally an LPF filters peak frequency signals and only outputs the differential frequency signals. The frequency output coverage frequency band of the voltage-controlled oscillator is wide, and the output range of the voltage-controlled oscillator can be changed as long as the output of the fixed oscillator and the passband range of a corresponding low pass filter are changed. The output frequency of the VCO is flexible and variable. The circuit structure is simple and easy to realize. System complexity is low.
Description
Technical field
The utility model relates to frequency synthesis field, is specifically related to a kind of super 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 realize the fast frequency of 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, adopt multiple VCO to switch to realize ultra broadband, but the method has increased the complexity of system, be difficult for realizing, and frequency sweep output spectrum is discontinuous in segmentation place.Therefore, how to provide function admirable, the reliable and stable super wide octave voltage controlled oscillator of one-part form to become an important subject.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is to provide the super wide octave voltage controlled oscillator of a kind of one-part form, requires it can avoid frequency range division, many VCO that current super wide octave voltage controlled oscillator adopts to switch implementation.
(2) technical scheme
For solving the problems of the technologies described above, the utility model provides a kind of super wide octave voltage controlled oscillator, and described super wide octave voltage controlled oscillator comprises: high band voltage controlled oscillator VCO, fixed oscillator OSC, frequency mixer Mix and low pass filter LPF; Wherein,
The input interface of described high band voltage controlled oscillator (VCO) connects external power source input, and the output interface of described high band voltage controlled oscillator (VCO) connects described frequency mixer (Mix) Yi road input interface;
The output interface of described fixed oscillator (OSC) connects another road interface of frequency mixer (Mix);
The output interface of described frequency mixer (Mix) connects described low pass filter (LPF);
Described high band voltage controlled oscillator VCO receives 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 output;
Described fixed oscillator OSC, according to the desired frequency output area of super 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 output;
Described frequency mixer Mix receives the frequency signal from high band voltage controlled oscillator VCO and fixed oscillator OSC, the two is carried out to mixing, obtain the signal to be filtered mixing with frequency signal and slip frequency signal by high band voltage controlled oscillator VCO and fixed oscillator OSC;
Described 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 of output high band voltage controlled oscillator VCO and fixed oscillator OSC.
(3) beneficial effect
In technical solutions of the utility model, outside input variable voltage source V
tto VCO, VCO exports corresponding frequency to Mix, the default fixed frequency signal of OSC output is simultaneously to Mix, after Mix mixing, output is by the signal to be filtered mixing with frequency signal and slip frequency signal of high band voltage controlled oscillator VCO and fixed oscillator OSC, last LPF filters and frequency signal, an output difference frequency signal.
It is wide that the frequency output of this voltage controlled oscillator covers frequency range, the free transmission range that changes 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 realization, and system complexity is low.
Brief description of the drawings
Fig. 1 is the structured flowchart of the super wide octave voltage controlled oscillator of the utility model.
Fig. 2 is the flow chart of realizing super wide octave VCO in technical solutions of the utility model implementation process.
Fig. 3 is the schematic diagram of technical solutions of the utility model implementation process.
Embodiment
For making the purpose of this utility model, content and advantage clearer, below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.
The resonant tank of LC oscillator is generally made up of fixed value inductance and the variable capacitance (variable capacitance diode) of high quality factor (Q value), but under normal circumstances, in practical implementation, the capacitance of variable capacitance and excursion thereof are all less.Requiring the output frequency of oscillator is f
c, by resonant frequency equation
known, should select the inductance of higher value and the electric capacity of smaller value to realize.
Can be obtained by resonant frequency equation
compared with for large VCO, should select the inductance of higher value and corresponding capacitance and all less electric capacity of excursion thereof to realize for design frequency excursion.But current integrated circuit technology does not realize the large inductance value inductance of high Q value, and the Q value of LC resonant tank is affected by the Q value of inductance mainly, is therefore difficult to realize the voltage controlled oscillator of super wide octave.
Adopt microstrip line can obtain the small inductor value inductance of high Q value, coordinate and select capacitance and all less electric capacity of excursion thereof, can obtain like this high band voltage controlled oscillator, its frequency values is higher and absolute bandwidth is all wider.Based on this, the utility model provides one-part form super 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 one super wide octave voltage controlled oscillator; Wherein,
The input interface of described high band voltage controlled oscillator (VCO) connects external power source input, and the output interface of described high band voltage controlled oscillator (VCO) connects described frequency mixer (Mix) Yi road input interface;
The output interface of described fixed oscillator (OSC) connects another road interface of frequency mixer (Mix);
The output interface of described frequency mixer (Mix) connects described low pass filter (LPF);
V
tfor outside input variable voltage source, for regulating the bias voltage of high band voltage controlled oscillator VCO resonant tank variable capacitance (variable capacitance diode);
Described high band voltage controlled oscillator VCO be a kind of by additional variable voltage source control to produce the signal generator of corresponding frequencies, i.e. voltage-frequency (V-F) change-over circuit, its corresponding relation is generally linear mathematical relationship; 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 output;
Described fixed oscillator OSC, for according to the desired frequency output area of super 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 output;
Described frequency mixer Mix is for receiving the frequency signal from high band voltage controlled oscillator VCO and fixed oscillator OSC, the two is carried out to mixing, obtain the signal to be filtered mixing with frequency signal and slip frequency signal by 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 of output high band voltage controlled oscillator VCO and fixed oscillator OSC, complete the implementation procedure of super wide octave VCO.
As shown in Figure 2, for realizing the flow chart of super wide octave VCO in technical solutions of the utility model 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, realizes voltage-frequency conversion, and high band voltage controlled oscillator VCO obtains corresponding frequency f
vand output;
Step S2: fixed oscillator OSC, according to the desired frequency output area of super 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 output;
Step S3: frequency mixer Mix receives the frequency signal from high band voltage controlled oscillator VCO and fixed oscillator OSC, the two is carried out to mixing, obtain the signal to be filtered mixing with frequency signal and slip frequency signal by 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 of output high band voltage controlled oscillator VCO and fixed oscillator OSC, complete the implementation procedure of super wide octave VCO.
As shown in Figure 3, illustrating for said process.
Wherein, f
vfor the signal of VCO is exported corresponding frequency, f
cfor the signal of OSC is exported corresponding frequency, t is the time.
First, outside input variable voltage source V
tto VCO, VCO output Cos2 Π f
vt to Mix, the Cos2 of OSC output simultaneously Π f
ct to Mix, after Mix mixing output 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 mixes of t, last LPF filters the (f with frequency signal Cos2 Π
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 utility model is described in further detail.
Embodiment
The VCO of the super wide octave taking design frequency scope as 0.1GHz～2GHz analyzes as example, specifically implements required each several part as follows:
1. the frequency range of 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 frequency output of 0.1GHz～2GHz.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and distortion, these improvement and distortion also should be considered as protection range of the present utility model.
Claims (1)
1. a super wide octave voltage controlled oscillator, it is characterized in that, described super wide octave voltage controlled oscillator comprises: high band voltage controlled oscillator (VCO), fixed oscillator (OSC), frequency mixer (Mix) and low pass filter (LPF); Wherein,
The input interface of described high band voltage controlled oscillator (VCO) connects external power source input, and the output interface of described high band voltage controlled oscillator (VCO) connects described frequency mixer (Mix) Yi road input interface;
The output interface of described fixed oscillator (OSC) connects another road interface of frequency mixer (Mix);
The output interface of described frequency mixer (Mix) connects described low pass filter (LPF);
Described high band voltage controlled oscillator (VCO) receives 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 output;
Described fixed oscillator (OSC), according to the desired frequency output area of super wide octave voltage controlled oscillator and the intrinsic frequency-tuning range of high band voltage controlled oscillator (VCO), is determined default fixed frequency signal f
cand output;
Described frequency mixer (Mix) receives the frequency signal from high band voltage controlled oscillator (VCO) and fixed oscillator (OSC), the two is carried out to mixing, obtain the signal to be filtered mixing with frequency signal and slip frequency signal by high band voltage controlled oscillator (VCO) and fixed oscillator (OSC);
Described 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 of output high band voltage controlled oscillator (VCO) and fixed oscillator (OSC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320756060.7U CN203872134U (en) | 2013-11-27 | 2013-11-27 | Ultra wide octave voltage-controlled oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320756060.7U CN203872134U (en) | 2013-11-27 | 2013-11-27 | Ultra wide octave voltage-controlled oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203872134U true CN203872134U (en) | 2014-10-08 |
Family
ID=51653053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320756060.7U Expired - Fee Related CN203872134U (en) | 2013-11-27 | 2013-11-27 | Ultra wide octave voltage-controlled oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203872134U (en) |
-
2013
- 2013-11-27 CN CN201320756060.7U patent/CN203872134U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20201127 |