CN100488028C - Electronic device with trimming voltage controlled oscillator - Google Patents
Electronic device with trimming voltage controlled oscillator Download PDFInfo
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- CN100488028C CN100488028C CNB031383696A CN03138369A CN100488028C CN 100488028 C CN100488028 C CN 100488028C CN B031383696 A CNB031383696 A CN B031383696A CN 03138369 A CN03138369 A CN 03138369A CN 100488028 C CN100488028 C CN 100488028C
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Abstract
A voltage controlled oscillator on circuit board that can adjust phase noises and frequency output range. It comprises resonant circuit, coupled circuit and oscillating circuit. The coupled circuit and resonant circuit each have tunable microstrip capacitor. Makes patterning for two conducting layer on the circuit board to form the lapped microstrip and places an insulation layer between the two conducting layer to build the tunable microstrip capacitor, then uses laser cutting the tunable microstrip capacitor from different direction to change its capacitance and make the capacitor presenting inductive character, and further to reach the purpose fine tuning the output frequency of the voltage controlled oscillator and phase noses.
Description
Technical field
The present invention relates to a kind of voltage controlled oscillator, and especially in regard to having a kind of electronic installation that can in manufacture process, finely tune the voltage controlled oscillator of reference frequency output.
Background technology
No matter be analog circuit or digital circuit, the circuit design of today is used oscillator in a large number, to realize various signal processing or communication function.Voltage controlled oscillator (Voltage Control Oscillator) is exactly a kind of significant components that is used for producing oscillator signal.The operation principle of voltage controlled oscillator is the reference voltage different to its input, can export different frequencies of oscillation.
Though the developing history of voltage controlled oscillator is remote, yet along with the quality requirements of modern electronic equipment for oscillator constantly promotes, the design of voltage controlled oscillator is also in renovation constantly.Still though there have many problems to have to be to be overcome so.
One of them common problem is, in the process of making voltage controlled oscillator, often because the difficulty in restriction on the material or the processing procedure control makes voltage controlled oscillator cause the result of output frequency deviation or phase noise variation in process of production.Yet, because oscillator was assembled and finished this moment, therefore how effectively to control the manufacturing qualification rate of voltage controlled oscillator, just become a major challenge.
Another common problem is that along with electronic installation is more and more exquisite, the design of entire circuit plate also is required to move towards integrated, therefore, how can effectively utilize the space, everywhere of circuit board, has all become utmost point target to be pursued.
And, increasing high frequency product is arranged now, for example radio telephone or wireless network etc. paste assembly with present surface, because its electrode tips parasitism the discontinuous spurious effects of high frequency, so for the quite serious restriction of characteristic generation of high frequency.Therefore in the field of high frequency, how to grasp material behavior to reach best product quality important engineering especially.
Summary of the invention
Therefore, the objective of the invention is to propose a kind of electronic installation that includes voltage controlled oscillator, and this voltage controlled oscillator has the effect of saving the circuit board usage space, make it more be applicable to compact high frequency communication product with fine-tuning capability.
Electronic installation according to the first embodiment of the present invention comprises: a voltage controlled oscillator has resonant circuit (resonate circuit), coupling circuit (coupling circuit) and oscillating circuit (oscillatingcircuit); One first patterned conductive layer, for settling this resonant circuit, this coupling circuit and this oscillating circuit, and this first patterned conductive layer has a plurality of little bands (micro-strips), for connecting this resonant circuit, this coupling circuit and this oscillating circuit, and comprise in these a plurality of little bands and be formed at little band on one first in this coupling circuit; One second patterned conductive layer has on one and first little with first time overlapped little band; One first insulating barrier, place between this first conductive layer and this second conductive layer, and this insulating barrier comprises one first open-work, filled conductive material in this first open-work wherein, and connect little this oscillating circuit that brings to this first time by this open-work, make this on first little band, this first time little band and this first insulating barrier constitute one first adjustable microstrip capacitor device in this coupling circuit jointly, wherein, the capacitance of this first adjustable microstrip capacitor can cut this little band and changing on first by part, also finely tune this voltage controlled oscillator thus, to obtain minimum phase noise.
In manufacture process, by the little band of last electric capacity is cut, for example use laser cutting, can change the capacitance of this adjustable microstrip capacitor.Because an end of this adjustable microstrip capacitor is connected to resonant circuit, the other end is connected to oscillating circuit, and when its capacitance changed, the coupling amount between oscillating circuit and resonant circuit changed this output frequency and phase noise that will influence oscillator simultaneously thereupon.Yet in the present embodiment, we only focus on the structural design of planting voltage controlled oscillator thus, obtain the output of minimum phase noise, are compensated about the change of frequency of oscillation second embodiment that will arrange in pairs or groups.
Electronic installation according to the second embodiment of the present invention comprises: a voltage controlled oscillator has a resonant circuit, a coupling circuit and an oscillating circuit; One first patterned conductive layer, this resonant circuit, this coupling circuit and this oscillating circuit are settled in confession, and this first patterned conductive layer has a plurality of little bands, for connecting this resonant circuit, this coupling circuit and this oscillating circuit, and comprise in these a plurality of little bands and be formed at little band on one first in this resonant circuit; One second patterned conductive layer has on one and first little with first time overlapped little band; One insulating barrier, place between this first conductive layer and this second conductive layer, make this little band on first, this first time little band and this insulating barrier constitute one first adjustable microstrip capacitor in this resonant circuit jointly, one inductance of this first adjustable microstrip capacitor and this resonant circuit joins, wherein, when cutting this with a first direction on first during little band, this adjustable microstrip capacitor presents inductive, to reduce a resonance frequency of this resonant circuit, and when cutting this with a second direction on first during little band, the capacitance of this adjustable electric capacity reduces, to increase this resonance frequency of this resonant circuit, thus to finely tune the scope of frequency of oscillation that this voltage controlled oscillator is produced.
In manufacture process, via last little band is carried out the cutting of different directions, for example use laser cutting, can change the capacitance of this adjustable microstrip capacitor device or make its electric capacity itself present inductive.This adjustable microstrip capacitor device is placed in the resonant circuit, and an end is connected other end ground connection with the inductance of resonant circuit.When going up little band with the first direction cutting, adjustable microstrip capacitor presents inductive, to reduce the resonance frequency of resonant circuit; And when going up little band with the second direction cutting, the capacitance of adjustable microstrip capacitor reduces, to increase the resonance frequency of resonant circuit, by this to finely tune frequency of oscillation that this voltage controlled oscillator is produced.
According to the electronic installation of the third embodiment of the present invention, it uses the two kinds of described skills of embodiment in front simultaneously.That is to say that it simultaneously uses the microstrip capacitor device and to the cutting of little band, can have minimum phase noise simultaneously concurrently and to obtain the fine setting purpose of output frequency the most accurately aspire to the voltage controlled oscillator in a large amount of manufacture processes at coupling circuit and resonant circuit.
Therefore, the present invention has following advantage at least.
At first, according to can the make full use of space of circuit board of the designed voltage controlled oscillator of the present invention, therefore reached more exquisite design.Secondly, according to the designed voltage controlled oscillator of the present invention, can avoid limiting the puzzlement that the manufacturing qualification rate of voltage controlled oscillator is brought because of material or processing procedure in the manufacture process, particularly when more the oscillator of high frequency is used, advantage of the present invention will more loom large.The 3rd, according to the designed voltage controlled oscillator of the present invention, partly use adjustable microstrip capacitor device at coupling circuit, successful replacement traditional surface paste capacitor, the ability of fine setting phase noise not only is provided, and overcome conventional surface and pasted assembly, further promoted the output quality of this oscillator at the non-continuous event that electrode tips caused.The 4th, according to the designed voltage controlled oscillator of the present invention, it uses the cutting of different directions in the adjustable microstrip capacitor of resonant circuit, change capacitance dexterously or allow capacitor itself present inductive mode, thus so that two-way frequency scaling capability to be provided.The 5th, according to the voltage controlled oscillator of made of the present invention,, therefore also can improve the qualification rate of making significantly by fine setting because it has the function of fine setting.The 6th, the present invention utilizes microstrip capacitor to replace traditional surface and pastes capacitor, further reduces material cost, effectively promotes the competitiveness of product price.
Description of drawings
Fig. 1 is the structural representation of a voltage controlled oscillator;
Fig. 2 is the circuit unit schematic diagram of a voltage-controlled oscillator circuit;
Fig. 3 is the circuit board schematic diagram according to first embodiment of the invention;
Fig. 4 A is the section explosive view according to the adjustable capacitance structure of first embodiment of the invention;
Fig. 4 B is the circuit diagram of Fig. 4 A;
Fig. 5 A is the schematic diagram of adjusting according to the adjustable electric capacity of first embodiment of the invention;
Fig. 5 B is the schematic diagram of adjusting according to the adjustable electric capacity of first embodiment of the invention;
Fig. 6 A is the profile according to the adjustable capacitance structure of second embodiment of the invention making;
Fig. 6 B is the section explosive view of the adjustable capacitance structure of Fig. 6 A;
Fig. 6 C is the circuit embodiments schematic diagram;
Fig. 7 A is with the schematic diagram of first direction adjustment according to the adjustable electric capacity of first embodiment of the invention;
Fig. 7 B is the schematic diagram of first direction adjustment according to the adjustable electric capacity of first embodiment of the invention;
Fig. 7 C is the schematic diagram of second direction adjustment according to the adjustable electric capacity of first embodiment of the invention;
Fig. 7 D is with the schematic diagram of second direction adjustment according to the adjustable electric capacity of first embodiment of the invention;
Fig. 8 A is the schematic diagram according to third embodiment of the invention; And
Fig. 8 B is the schematic diagram according to each layer assembly of third embodiment of the invention;
Wherein, description of reference numerals is as follows:
10 voltage controlled oscillators, 11 resonant circuits
13 coupling circuits, 15 oscillating circuits
17 control voltages, 20 voltage controlled oscillators
21 resonant circuits, 211 adjustable microstrip capacitors
23 coupling circuits, 231 adjustable microstrip capacitors
25 oscillating circuits, 27 control voltages
30 voltage controlled oscillators, 31 resonant circuits
32 first conductive layers, 33 coupling circuits
Little band on the 331 adjustable microstrip capacitors 3310
33101 links, 33103 cutting tracks
3312 times little 3314 conductive materials of being with
34 insulating barriers, 36 second conductive layers
40 voltage controlled oscillators, 411 adjustable microstrip capacitors
Littlely on 4110 be with little band 4112 times
4116 conductive materials, 41103 cutting tracks
41105 cutting tracks, 41107 cutting tracks
41109 cutting tracks, 42 first conductive layers
43 inductance, 44 insulating barriers
441 perforation, 45 oscillating circuits
46 conductive layers, 48 insulating barriers
481 perforation, 49 inductance
Embodiment
Please refer to Fig. 1, is the structural representation of a voltage controlled oscillator 10.Voltage controlled oscillator 10 is to utilize external control voltage 17 to adjust the output frequency of oscillator 10.As shown in Figure 1, voltage controlled oscillator 10 includes a resonant circuit 11, a coupling circuit 13, and an oscillating circuit 15.Oscillating circuit 15 is the continuities that are used for exciting vibration and keep oscillator signal, but and the frequency of oscillation that resonant circuit 11 limit oscillating circuits 15 are produced is confined to required frequency separation with the operating frequency range of oscillator.13 of coupling circuits are used for connecting resonant circuit 11 and oscillating circuit 15.In addition, adjust coupling circuit 13 and also can further adjust the purpose that the coupling amount of 11 of oscillating circuit 15 and resonant circuits is further reached the phase noise adjustment.
Then, please refer to Fig. 2, is the circuit diagram of a kind of voltage controlled oscillator 20 of illustration.Voltage controlled oscillator 20 is adjusted the output frequency of oscillator 20 by an external control voltage 27.As shown in Figure 2, voltage controlled oscillator 20 includes a resonant circuit 21, a coupling circuit 23 and an oscillating circuit 25.
In this illustrated embodiment, resonant circuit 21 can be made up of the circuit units such as variable capacitance diode of voltage adjustment some electric capacity, inductance, an adjustable microstrip capacitor 211 and.23 of coupling circuits are made of another adjustable microstrip capacitor 231.Formed by some electric capacity, inductance and two-carrier transistor circuit units such as (BJT) as for 25 of oscillating circuits.It must be noted that the voltage controlled oscillator 20 that draw in this place is only for signal,, must advise and belong to scope of the present invention when the circuit framework that can use various differences slightly.
Key character of the present invention comprises design and the fine-tuning mode that adjustable electric capacity 211,231 is proposed.Below will be illustrated it with three embodiment.
First embodiment
In this embodiment, being installed on the voltage controlled oscillator on the electronic device circuit plate, is by the adjustable serial microstrip capacitor device of adjusting in the coupling circuit, as the adjustable electric capacity 231 among Fig. 2, to reach in making the voltage controlled oscillator process, adjust the work of its phase noise.
Please refer to Fig. 3, Fig. 3 is a kind of board structure of circuit of voltage controlled oscillator 30.As shown in Figure 3, voltage controlled oscillator 30 comprises a resonant circuit 31, a coupling circuit 33 and an oscillating circuit 35.The circuit structure of resonant circuit 31, coupling circuit 33 and oscillating circuit 35 can be with reference to circuit diagram shown in Figure 2.
At first, utilize patterning first conductive layer 32 to form a plurality of little bands.This is with slightly has conductivity, is used for connecting the circuit unit of resonant circuit 31, coupling circuit 33 and oscillating circuit 35.In this is with slightly, comprise and littlely on one be with 3310, with the part of the microstrip capacitor 331 that constitutes coupling circuit 33.
In addition, utilize patterning one second conductive layer 36, make second conductive layer 36 form little band at least, and this down little band and first conductive layer 32 last little be with 3310 overlapping.And, mail an insulating barrier 34 at first conductive layer 32 and 36 of second conductive layers.Insulating barrier 34 has a perforation, filled conductive material in this perforation, and by electric conducting material, the last little of second conductive layer 36 and first conductive layer 32 can be connected to the oscillating circuit that is positioned at first conductive layer 32 with 3310 overlapping following little bands, and make to go up thus littlely be with 3310, little band and insulating barrier 32 are common down constitutes adjustable microstrip capacitor devices 331.
Then, utilize laser or other cutting tool, the part cutting is upward little is with 3310, to change the capacitance of adjustable electric capacity 331, can change the electrical of coupling circuit thus, and adjust the phase noise of voltage controlled oscillator 30, to obtain minimum phase noise output.
In order more to clearly demonstrate the structure of adjustable microstrip capacitor device 331, below please refer to Fig. 4 A, be the combination schematic diagram of the voltage controlled oscillator 30 of Fig. 3.
As previously mentioned, adjustable microstrip capacitor device 331 is the circuit units as the coupling circuit 33 of voltage controlled oscillator 30, and at one end 33101 connect resonant circuit assembly 31, and connects oscillating circuit assembly 35 at the other end 33102.Adjustable microstrip capacitor device 331 be by upward littlely be with 3310, insulating barrier 34 and littlely down be with 3312 to constitute.Insulating barrier 34 has perforation 341, and filled conductive material 3314 in it littlely is with 3312 to be connected to oscillating circuit assembly 35 descending.Therefore, by the structure of Fig. 4 A, can obtain the structural representation of the voltage-controlled circuit 30 shown in Fig. 4 B.
Then, please referring to Fig. 5 A and Fig. 5 B.This two figure signal is observed upward little with 3,310 two kinds of different adjustment states with regard to vertical view.In making the process of voltage controlled oscillator 30, can be with laser or other cutting tool, littlely be with 3310 to cut last, for example the cutting track 33103 shown in Fig. 5 A and Fig. 5 B.By cutting, can make adjustable microstrip capacitor 331 obtain different capacitances at last little diverse location with 3310.The cutting track shown in Fig. 5 A for example, with respect to the cutting track shown in Fig. 5 B, the former can make adjustable microstrip capacitor 331 have less capacitance.
Because adjustable microstrip capacitor 331 is placed in the coupling circuit of voltage controlled oscillator 30, therefore when its capacitance changes, just can change the oscillating circuit of voltage controlled oscillator and the coupling amount between resonant circuit, present different phase noises and output frequency with the little band number of cutting, yet what inquired in the present embodiment is how to obtain best coupling amount by the adjustment of coupling capacitance, to obtain minimum phase noise output, change for frequency if possible exceeds the specification institution scope, and second embodiment that then should arrange in pairs or groups is compensated.
Second embodiment
In this embodiment, being installed on the voltage controlled oscillator on the electronic device circuit plate, is by the microstrip capacitor device of adjusting in the resonant circuit adjustable in parallel, as the adjustable microstrip capacitor 211 among Fig. 2, to reach in making the voltage controlled oscillator process, adjust the work of its output frequency.
Please refer to Fig. 6 A, it illustrates a kind of board structure of circuit and circuit thereof of voltage controlled oscillator 40.Voltage controlled oscillator 40 comprises a resonant circuit, a coupling circuit and an oscillating circuit three parts.The circuit structure of resonant circuit, coupling circuit and oscillating circuit can be with reference to circuit diagram shown in Figure 2.
Its circuit structure is as follows in this embodiment.At first, with first conductive layer, 42 patternings to form a plurality of little bands.This is with slightly has conductivity, is used for connecting the circuit unit of resonant circuit, coupling circuit and oscillating circuit.And, in this is with slightly, comprise and littlely on one be with 4110, be arranged in the part that resonant circuit becomes resonant circuit.
In addition,, make second conductive layer 46 form a down little band ground connection at least, and be with 4110 overlapping with first conductive layer 42 last little with second conductive layer, 46 patternings.And, settle an insulating barrier 44 at first conductive layer 42 and 46 of second conductive layers.Insulating barrier 44 has a perforation 481, filled conductive material 4116 in perforation 481, and by electric conducting material 4116, can be connected to the oscillating circuit that is positioned at first conductive layer 42 by following little band that second conductive layer 46 and first conductive layer 42 is overlapping, make to go up thus and littlely be with 4110, little band and insulating barrier 44 are common down constitutes adjustable microstrip capacitor devices 411, and this adjustable microstrip capacitor device is placed in the resonant circuit.
Then, the output frequency of decision voltage controlled oscillator should be heightened or turn down.Shown in Fig. 6 B, when output frequency is turned down in decision, utilize laser or other cutting tool, partly cut little band with a first direction A, at this moment, this microstrip capacitor will present inductive because the electric wave transmission path increases, thus to reduce the resonance frequency of resonant circuit.Relatively,, partly cut little band,, and then reach the purpose of the resonance frequency that increases resonant circuit thus with the capacitance of reduction microstrip capacitor 411 with a second direction B if decision then utilizes laser or other cutting tool will heighten output frequency the time.By said method, just adjustable seamless frequency of oscillation that controlled oscillator is exported.
In order to be illustrated more clearly in the structure of the adjustable microstrip capacitor device of this kind, please refer to Fig. 6 B, the structure of the adjustable capacitor 411 of this figure illustration.Because adjustable electric capacity 331 part-structures of this adjustable capacitor 411 and first embodiment are similar, therefore in the following description, the identical person of label with the front, its meaning can be with reference to the description of front.
Then, please refer to Fig. 7 A and Fig. 7 B, its explanation is cut the last little of adjustable microstrip capacitor device 411 with first direction A and is with 4110, makes adjustable microstrip capacitor device 411 present inductive thus, and change the resonance frequency of its resonant circuit, and then adjust the reference frequency output of voltage controlled oscillator.
For instance, if with laser or other cutting tool last little with 4110 tracks 41103 that cut out Fig. 7 A, then can reduce the output frequency of voltage controlled oscillator.If want to make the output frequency of voltage controlled oscillator to be even lower, then can cut out track 41105 as Fig. 7 B.
Then, please refer to Fig. 7 C and Fig. 7 D, this two figure explanation last littlely cuts out the track 41107 of Fig. 7 C and the track 41109 of Fig. 7 D with 4110 with what second direction B cut adjustable microstrip capacitor 411, makes resonance frequency to reduce and rise because of the shunt capacitance amount with the capacitance that changes adjustable electric capacity 411 thus.If last little with 4110 tracks 41109 that cut out Fig. 7 D, then the output frequency of voltage controlled oscillator can rise De Genggao with laser or other cutting tool.
The 3rd embodiment
Except two above-mentioned embodiment settle adjustable microstrip capacitor device respectively on coupling circuit and resonant circuit, another kind of embodiment settles adjustable microstrip capacitor device simultaneously on coupling circuit and resonant circuit.
That is to say that the 3rd embodiment is in conjunction with first embodiment and second embodiment.Please refer to Fig. 8 A, this figure has shown a kind of circuit board in conjunction with first embodiment and second embodiment.On this circuit board, have the adjustable microstrip capacitor 211 and 231 that constitutes by little band, be placed in the coupling circuit and the resonant circuit of voltage controlled oscillator respectively.Wherein, adjustable microstrip capacitor 211 can cut at diverse location, so that different coupling capacitance amounts to be provided, obtains minimum phase noise.Can reach the cutting of Y direction, thus accurately to adjust the output frequency of voltage controlled oscillator in directions X as for 231 of adjustable microstrip capacitors.
In addition, please refer to Fig. 8 B, this figure has shown the three-dimensional explosive view of the circuit board of Fig. 8 A.Thus and cooperate the explanation of front, then can more clearly grasp technology of the present invention.
Though the present invention discloses as above with a preferred embodiment, but be not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention, the equivalent structure transformation of being made all is included in the claim of the present invention.
Claims (10)
1. the electronic installation with regulatable voltage controlled oscillator is characterized in that, comprises:
One voltage controlled oscillator has a resonant circuit, a coupling circuit and an oscillating circuit;
One first patterned conductive layer, for settling this resonant circuit, this coupling circuit and this oscillating circuit, and this first patterned conductive layer has a plurality of little bands, for connecting this resonant circuit, this coupling circuit and this oscillating circuit, and comprise in these a plurality of little bands and be formed at little band on one first in this coupling circuit;
One second patterned conductive layer has on one and first little with first time overlapped little band;
One first insulating barrier, place between this first conductive layer and this second conductive layer, and this insulating barrier comprises one first open-work, filled conductive material in this first open-work wherein, and connect little this oscillating circuit that brings to this first time by this open-work, make this on first little band, this first time little band and this first insulating barrier constitute one first adjustable microstrip capacitor device in this coupling circuit jointly, wherein, the capacitance of this first adjustable microstrip capacitor can cut this little band and changing on first by part, also finely tune this voltage controlled oscillator thus, to obtain minimum phase noise.
2. electronic installation as claimed in claim 1 is characterized in that, an end of this first adjustable microstrip capacitor is connected to this resonant circuit, and the other end of this first adjustable microstrip capacitor then is connected to this oscillating circuit.
3. electronic installation as claimed in claim 2, it is characterized in that, described little band of this first conductive layer also is included in little band on one second in this resonant circuit, and this second conductive layer also comprises on one and second little with second time overlapped little band, and this little band on second, this first insulating barrier and this second time little band constitute one second adjustable microstrip capacitor, and the inductance in this second adjustable microstrip capacitor and this resonant circuit joins, thus by part cut this on second little band to change the circuit characteristic of this resonant circuit, wherein when cutting this with a first direction on second during little band, this second adjustable microstrip capacitor presents inductive, to reduce a resonance frequency of this resonant circuit, and when cutting this with a second direction on second during little band, the capacitance of this second adjustable microstrip capacitor reduces, to increase this resonance frequency of this resonant circuit, thus also for the scope of finely tuning frequency of oscillation that this voltage controlled oscillator produces.
4. electronic installation as claimed in claim 3 is characterized in that, an end of this second adjustable microstrip capacitor and this inductance joins, and the other end then is connected to ground.
5. electronic installation as claimed in claim 4, it is characterized in that, comprise one the 3rd patterned conductive layer and one second insulating barrier, wherein this second insulating barrier is placed between the 3rd conductive layer and second conductive layer, and this second insulating barrier comprises one second perforation, this second perforation filled conductive material, the 3rd conductive layer then is connected to ground connection, with the ground connection of described circuit unit that this conductive layer and this second conductive layer are provided.
6. the electronic installation with regulatable voltage controlled oscillator is characterized in that, comprises:
One voltage controlled oscillator has a resonant circuit, a coupling circuit and an oscillating circuit;
One first patterned conductive layer, for settling this resonant circuit, this coupling circuit and this oscillating circuit, and this first patterned conductive layer has a plurality of little bands, for connecting this resonant circuit, this coupling circuit and this oscillating circuit, and comprise in these a plurality of little bands and be formed at little band on one first in this resonant circuit;
One second patterned conductive layer has on one and first little with first time overlapped little band;
One insulating barrier, place between this first conductive layer and this second conductive layer, make this little band on first, this first time little band and this insulating barrier constitute one first adjustable microstrip capacitor in this resonant circuit jointly, one inductance of this first adjustable microstrip capacitor and this resonant circuit joins, wherein, when cutting this with a first direction on first during little band, this adjustable microstrip capacitor presents inductive, to reduce a resonance frequency of this resonant circuit, and when cutting this with a second direction on first during little band, the capacitance of this adjustable electric capacity reduces, to increase this resonance frequency of this resonant circuit, thus to finely tune the scope of frequency of oscillation that this voltage controlled oscillator is produced.
7. electronic installation as claimed in claim 6 is characterized in that, an end of this first adjustable microstrip capacitor and this inductance joins, and the other end then is connected to ground.
8. electronic installation as claimed in claim 7, it is characterized in that, also comprise one the 3rd patterned conductive layer and one second insulating barrier, wherein this second insulating barrier is placed between the 3rd conductive layer and second conductive layer, and this second insulating barrier comprises a perforation, this perforation filled conductive material, the 3rd conductive layer is connected to ground connection, so that the described circuit unit ground connection of this conductive layer and this second conductive layer to be provided.
9. electronic installation as claimed in claim 8, it is characterized in that, described little band of this first conductive layer also comprises little band on one second in this coupling circuit, and this second conductive layer also comprises in the formation one and second little with second time overlapped little band, make this on second little band, this first insulating barrier and this second time little band constitute one second adjustable microstrip capacitor device, thus, the capacitance of this of this coupling circuit second adjustable microstrip capacitor can cut this little band and changing on second by part, and then finely tunes this voltage controlled oscillator to obtain minimum phase noise.
10. electronic installation as claimed in claim 9 is characterized in that, an end of this second adjustable microstrip capacitor is connected to this resonant circuit, and the other end of this second adjustable microstrip capacitor then is connected to this oscillating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031383696A CN100488028C (en) | 2003-05-28 | 2003-05-28 | Electronic device with trimming voltage controlled oscillator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031383696A CN100488028C (en) | 2003-05-28 | 2003-05-28 | Electronic device with trimming voltage controlled oscillator |
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| CN1553566A CN1553566A (en) | 2004-12-08 |
| CN100488028C true CN100488028C (en) | 2009-05-13 |
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| CN101431860B (en) * | 2007-11-07 | 2010-07-28 | 英业达股份有限公司 | Clock pulse generator |
| CN102142811B (en) * | 2010-02-01 | 2013-02-13 | 华东师范大学 | Low-noise CMOS (complementary metal oxide semiconductor) voltage-controlled oscillation circuit based on low-voltage difference voltage regulator |
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