CN103684259B - Voltage-controlled oscillator with low noise and large tuning range - Google Patents
Voltage-controlled oscillator with low noise and large tuning range Download PDFInfo
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Abstract
The invention provides a voltage-controlled oscillator with low noise and large tuning range, wherein a current source circuit is used for generating the current for the voltage-controlled oscillator to work; the resonant circuit is used for generating an oscillating signal of the voltage-controlled oscillator; the resonant circuit is an inductance-capacitance resonant circuit, wherein the capacitance adopts an MOS capacitive reactance tube, and the tuning range of the circuit is enlarged; the negative resistance circuit is used for generating negative resistance so as to counteract positive resistance generated by the resonance circuit; the feedback circuit is used for feeding back the oscillation signal generated by the resonant circuit to the current source circuit, so that new current is injected into the current source, and the use efficiency of the voltage-controlled oscillator is improved. Therefore, the voltage-controlled oscillator of the embodiment of the invention has larger output voltage amplitude. The larger the amplitude of the output voltage of the voltage-controlled oscillator is, the better the phase noise performance is.
Description
Technical field
It is more particularly to a kind of that there is low noise and the voltage-controlled of big tuning range to shake the present invention relates to technical field of integrated circuits
Swing device.
Background technology
Voltage controlled oscillator (VCO, voltage-controlled oscillator) refers to output frequency and input control electricity
It is pressed with the oscillating circuit of corresponding relation.
Voltage controlled oscillator is one of very important basic circuit in integrated circuit, and the implementation of its circuit mainly has two
Kind, it is annular voltage controlled oscillator respectively（Ring VCO）And LC voltage controlled oscillator（LC VCO）.Voltage controlled oscillator is wide
The clock being applied to generally in microprocessor is synchronous（Clock Synchronization）Circuit；In wireless communication transceiver
Frequency synthesizer（Frequency Synthesizer）；Clock recovery circuitry in fiber optic communication（CRC, Clock Recovery
Circuit）And leggy sampling（Multi-phase Sampling）In circuit.
Phase noise is one of major parameter for weighing voltage controlled oscillator performance.In most cases, voltage controlled oscillator
Phase noise performance is to influence the main factor of integrated receiver sensitivity.The signal spectrum of preferable voltage controlled oscillator output
It is an impulse function, but due to various noise sources, the signal spectrum characteristic of voltage controlled oscillator output in actual circuit be present
All it is frequency cover curve.
Noise source in voltage-controlled oscillator circuit can be divided into two major classes：Device noise and external interference noise, Qian Zhezhu
To include thermal noise and flicker noise；The latter mainly includes substrate and power supply noise.The device noise of voltage controlled oscillator mainly comes
Come from the series parasitic resistance, switch differential pair tube and tail current source of on-chip inductor and variable capacitance.
Referring to Fig. 1, the figure is a kind of voltage controlled oscillator schematic diagram of the prior art.
The current source of voltage controlled oscillator shown in Fig. 1 is by DC voltage control, such as the voltage VBIAS controls in Fig. 1
Triode Q0.
Voltage controlled oscillator output end（POUT and NOUT）Minimum voltage be two bipolar transistors（Q0 and Q1）Collection
Sum drops in electrode-transmitter extreme pressure, and because two HBT junction voltage sum is smaller, therefore it is less defeated to cause voltage controlled oscillator to have
Go out.
Therefore, there is higher phase noise in the voltage controlled oscillator shown in Fig. 1, and phase noise performance is relatively low.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of voltage controlled oscillator, has larger output voltage amplitude, energy
The phase noise of whole circuit is enough reduced, improves phase noise performance.
The embodiment of the present invention provides a kind of voltage controlled oscillator with low noise and big tuning range, including：Resonance circuit,
Negative resistance circuit, current source circuit and feedback circuit；
The resonance circuit, for producing the oscillator signal of voltage controlled oscillator, the resonance circuit is that inductance and capacitance type is humorous
Shake circuit, and electric capacity therein uses MOS capacitive reactance pipes；
The negative resistance circuit, for producing negative resistance, just hindered caused by the resonance circuit with offsetting；
The current source circuit, for producing the electric current of voltage controlled oscillator work；
The feedback circuit, for oscillator signal caused by the resonance circuit to be fed back into the current source circuit.
Preferably, the resonance circuit includes：Differential inductance, the first MOS capacitive reactances pipe, the 2nd MOS capacitive reactances pipe, the 3rd electricity
Appearance, the 4th electric capacity, first resistor and second resistance；
One end connection first node of the differential inductance, other end connection section point；
The grid of the first MOS capacitive reactance pipes connects the 3rd node, and the first control is connected together with drain electrode and source shorted
Voltage；
The grid of the 2nd MOS capacitive reactance pipes connects fourth node, and described first is connected together with drain electrode and source shorted
Control voltage；
One end of the first resistor connects the 3rd node, other end ground connection；
One end of the second resistance connects the fourth node, other end ground connection；
The both ends of 3rd electric capacity connect the first node and the 3rd node respectively, and the two of the 4th electric capacity
End connects the section point and the fourth node respectively；
The first node is the first phase contact of the resonance circuit and negative resistance circuit, exports the first resonance signal, institute
The second phase contact that section point is the resonance circuit and negative resistance circuit is stated, exports the second resonance signal.
Preferably, the negative resistance circuit includes：First bipolar transistor, the second bipolar transistor, 3rd resistor,
Four resistance, the 5th electric capacity, the 6th electric capacity and the 11st electric capacity；
The base stage of first bipolar transistor connects the 5th node, colelctor electrode connection first node, and the first node is
First phase contact of the negative resistance circuit and resonance circuit；
The base stage of second bipolar transistor connects the 6th node, colelctor electrode connection section point, and the section point is
Second phase contact of the negative resistance circuit and resonance circuit；
The emitter stage of first bipolar transistor connects with the emitter stage of second bipolar transistor, connects
Node is as the input of the negative resistance circuit and the output end phase contact of current source circuit；
One end of 3rd resistor connects the 5th node, and the other end connects the second control voltage；
One end of 4th resistance connects the 6th node, and the other end connects second control voltage；
One end of 5th electric capacity connects the first node, and the other end connects the 6th node；
One end of 6th electric capacity connects the section point, and the other end connects the 5th node；
The both ends of 11st electric capacity connect second control voltage and ground respectively.
Preferably, the current source circuit includes：3rd bipolar transistor, the 4th bipolar transistor, the 5th resistance,
6th resistance, the 9th electric capacity and the tenth electric capacity；
9th electric capacity of the base stage connection ground connection of the 3rd bipolar transistor, the base stage is the first feedback signal
Input, the grounded emitter of the 3rd bipolar transistor；
Tenth electric capacity of the base stage connection ground connection of the 4th bipolar transistor, the base stage is the second feedback signal
Input, the grounded emitter of the 4th bipolar transistor；
The colelctor electrode of 3rd bipolar transistor connects with the colelctor electrode of the 4th bipolar transistor, connects
Node is as the input of negative resistance circuit and the output end phase contact of current source circuit；
One end of 5th resistance connects the base stage of the 3rd bipolar transistor, the control electricity of other end connection the 3rd
Pressure；
One end of 6th resistance connects the base stage of the 4th bipolar transistor, the control electricity of other end connection the 3rd
Pressure.
Preferably, the feedback circuit includes：7th electric capacity and the 8th electric capacity；
First output end of one end connection resonance circuit of the 7th electric capacity, the first of other end connection current source circuit
Signal input part, the first resonance signal pass through the 7th capacitive feedback to current source circuit, the other end of the 7th electric capacity
For the first output end of voltage controlled oscillator；
Second output end of one end connection resonance circuit of the 8th electric capacity, the second of other end connection current source circuit
Signal input part, the second resonance signal pass through the 8th capacitive feedback to current source circuit, the other end of the 8th electric capacity
For the second output end of voltage controlled oscillator.
Preferably, appearance of the capacitance of the 3rd electric capacity and the 4th electric capacity than the first MOS capacitive reactances pipe and the 2nd MOS capacitive reactance pipes
Value is at least big 10 times.
Preferably, the first MOS capacitive reactances pipe and the 2nd MOS capacitive reactance pipes work in accumulation area or depletion region.
Preferably, first bipolar transistor and the second bipolar transistor are in positive workspace.
Preferably, the 3rd bipolar transistor and the 4th bipolar transistor are in positive workspace.
Preferably, the capacitance of the 7th electric capacity and the 8th electric capacity is the capacitance of the first MOS capacitive reactances pipe and the 2nd MOS capacitive reactance pipes
1/10th.
Compared with prior art, the present invention has advantages below：
Provided by the invention to have in low noise and big tuning range voltage controlled oscillator, current source circuit is voltage-controlled for producing
The electric current of oscillator operation；Resonance circuit is used for the oscillator signal for producing voltage controlled oscillator；The resonance circuit is inductance capacitance
Formula resonance circuit, electric capacity therein use MOS capacitive reactance pipes, increase the tuning range of circuit；Negative resistance circuit is used to produce negative resistance, with
Offset and just hindered caused by the resonance circuit；The feedback circuit is used to feed back to oscillator signal caused by the resonance circuit
The current source circuit, so as to inject new electric current for current source, improve the service efficiency of voltage controlled oscillator.It is so that of the invention
The voltage controlled oscillator of embodiment has bigger output voltage amplitude.The output voltage amplitude of voltage controlled oscillator is bigger, its phase
Noiseproof feature is just better.
Brief description of the drawings
Fig. 1 is a kind of voltage controlled oscillator schematic diagram of the prior art；
Fig. 2 is the schematic diagram of the voltage controlled oscillator embodiment one provided by the invention with low noise and big tuning range；
Fig. 3 is the schematic diagram of the voltage controlled oscillator embodiment two provided by the invention with low noise and big tuning range.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.
Referring to Fig. 2, the figure is the voltage controlled oscillator embodiment one provided by the invention with low noise and big tuning range
Schematic diagram.
The voltage controlled oscillator that the present embodiment provides, including：Resonance circuit 100, negative resistance circuit 200, the and of current source circuit 300
Feedback circuit 400：
The resonance circuit 100, for producing the oscillator signal of voltage controlled oscillator, the resonance circuit 100 is inductance electricity
Appearance formula resonance circuit, electric capacity therein use MOS capacitive reactance pipes；
The negative resistance circuit 200, for producing negative resistance, just hindered caused by the resonance circuit 100 with offsetting；
The current source circuit 300, for producing the electric current of voltage controlled oscillator work；
The feedback circuit 400, for oscillator signal caused by the resonance circuit 100 to be fed back into the current source electricity
Road 300.
In voltage controlled oscillator provided by the invention, current source circuit 300 is used for the electric current for producing voltage controlled oscillator work；It is humorous
The circuit 100 that shakes is used for the oscillator signal for producing voltage controlled oscillator；The resonance circuit 100 is inductance and capacitance type resonance circuit, its
In electric capacity use MOS capacitive reactance pipes, increase the tuning range of circuit；Negative resistance circuit 200 is used to produce negative resistance, described humorous to offset
Shake and just hindered caused by circuit 100；The feedback circuit 400 is used to feed back to oscillator signal caused by the resonance circuit 100
The current source circuit 300, so as to inject new electric current for current source circuit 300, improve the service efficiency of voltage controlled oscillator.From
And make the voltage controlled oscillator of the embodiment of the present invention that there is bigger output voltage amplitude.The output voltage amplitude of voltage controlled oscillator is got over
Greatly, its phase noise performance is just better.
The concrete structure of voltage controlled oscillator provided in an embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
Referring to Fig. 3, the figure is the voltage controlled oscillator embodiment two provided by the invention with low noise and big tuning range
Schematic diagram.
The voltage controlled oscillator that the present embodiment provides, including：Resonance circuit, negative resistance circuit, current source circuit and feedback circuit；
The resonance circuit includes：Differential inductance L0, the first MOS capacitive reactance pipes C1, the 2nd MOS capacitive reactance pipes C2, the 3rd electric capacity
C3, the 4th electric capacity C4, first resistor R1, second resistance R2；
Differential inductance L0 tap connection power supply.
One end connection first node A of the differential inductance L0, other end connection section point B；
The grid of the first MOS capacitive reactance pipes connects the 3rd node C, and the first control is connected together with drain electrode and source shorted
Voltage ATUNE；
The grid of the 2nd MOS capacitive reactance pipes connects fourth node D, and described first is connected together with drain electrode and source shorted
Control voltage ATUNE；
The voltage controlled oscillator can adjust the work of voltage controlled oscillator by adjusting the first control voltage ATUNE size
Frequency.
One end of the first resistor R1 connects the 3rd node C, other end ground connection；
One end of the second resistance R2 connects the fourth node D, other end ground connection；
The both ends of the 3rd electric capacity C3 connect the first node A and the 3rd node C respectively, the 4th electric capacity C4's
Both ends connect the section point B and fourth node D respectively.
The first node A is the first phase contact of the resonance circuit and negative resistance circuit, exports the first resonance signal, institute
The second phase contact that section point B is the resonance circuit and negative resistance circuit is stated, exports the second resonance signal.
It should be noted that C1 and C2 work in accumulation area or depletion region.
The capacitance of the 3rd electric capacity C3 and the 4th electric capacity C4 is than the first MOS capacitive reactance pipe C1's and the 2nd MOS capacitive reactance pipes C2
Capacitance is at least big 10 times, can so ensure that voltage controlled oscillator provided in an embodiment of the present invention has wider frequency tuning model
Enclose.
It should be noted that the electric capacity in the resonance circuit of the embodiment of the present invention uses MOS capacitive reactance pipes（C1 and C2）.MOS
The capacitance size of capacitive reactance pipe changes greatly with the first control voltage ATUNE's, so as to using the VCO utensil of MOS capacitive reactance pipes
There is larger tuning range.
The negative resistance circuit includes：The first transistor bipolar transistor Q1, the second bipolar transistor Q2,3rd resistor
R3, the 4th resistance R4, the 5th electric capacity C5, the 6th electric capacity C6, the 11st electric capacity C11；
First bipolar transistor Q1 base stage connects the 5th node M, colelctor electrode connection first node A, the first segment
Point A is the first phase contact of the negative resistance circuit and resonance circuit；
Second bipolar transistor Q2 base stage connects the 6th node N, colelctor electrode connection section point B, second section
Point B is the second phase contact of the negative resistance circuit and resonance circuit；
The emitter stage of the first bipolar transistor Q1 connects with the emitter stage of the second bipolar transistor Q2, phase
The node connect is as the input of the negative resistance circuit and the output end phase contact of current source circuit；
3rd resistor R3 one end connects the 5th node M, and the other end connects the second control voltage CDC；
4th resistance R4 one end connects the 6th node N, and the other end connects the second control voltage CDC；
5th electric capacity C5 one end connects the first node A, and the other end connects the 6th node N；
6th electric capacity C6 one end connects the section point B, and the other end connects the 5th node M；
5th electric capacity C5 and the 6th electric capacity C6 effect assists Q1 and Q2 to realize primarily to isolated DC signal
The effect of negative resistance, just hindered caused by resonance circuit so as to compensate.
11st electric capacity C11 both ends connect the second control voltage CDC and ground respectively.
It should be noted that it can ensure that Q1 and Q2 is in positive and worked by adjusting the second control voltage CDC size
Area.
The current source circuit includes：3rd bipolar transistor Q3, the 4th bipolar transistor Q4, the 5th resistance R5,
6th resistance R6, the 9th electric capacity C9 and the tenth electric capacity C10；
9th electric capacity C9 of the base stage connection ground connection of the 3rd bipolar transistor Q3, the base stage is the first feedback letter
Number input, the 3rd bipolar transistor Q3 grounded emitter；
Tenth electric capacity C10 of the base stage connection ground connection of the 4th bipolar transistor Q4, the base stage are the second feedback
The input of signal, the 4th bipolar transistor Q4 grounded emitter；
The colelctor electrode of the 3rd bipolar transistor Q3 connects with the colelctor electrode of the 4th bipolar transistor Q4, phase
The node connect is as the input of negative resistance circuit and the output end phase contact of current source circuit；
One end of the 5th resistance R5 connects the base stage of the 3rd bipolar transistor Q3, the control of other end connection the 3rd
Voltage VBIAS processed；
One end of the 6th resistance R6 connects the base stage of the 4th bipolar transistor Q4, the control of other end connection the 3rd
Voltage VBIAS processed.
It should be noted that by controlling VBIAS voltage swing Q3 and Q4 can be made to be in positive workspace.
It should be noted that C9 and C10 strobe, high-frequency signal caused by Q3 and Q4 is filtered out.
It should be noted that described Q1, Q2, Q3 and Q4 can be HBT.
The feedback circuit includes：7th electric capacity C7 and the 8th electric capacity C8；
First output end of one end connection resonance circuit of the 7th electric capacity C7（The first node A）, other end company
The first signal input part of current source circuit is connect, the first resonance signal feeds back to current source circuit by the 7th electric capacity C7,
The other end of the 7th electric capacity C7 is the first output end NOUT of voltage controlled oscillator；
Second output end of one end connection resonance circuit of the 8th electric capacity C8（The section point B）, other end company
The secondary signal input of current source circuit is connect, the second resonance signal feeds back to current source circuit by the 8th electric capacity C8,
The other end of the 8th electric capacity C8 is the second output end POUT of voltage controlled oscillator.
7th electric capacity C7 and the 8th electric capacity C8 effect is mainly blocking, while gives AC signal feedback to current source electricity
Road, new electric current is injected for current source circuit.Utilize so as to carry out feedback to oscillator signal caused by resonance circuit, so may be used
To improve service efficiency.
It should be noted that POUT and NOUT are two output ends of voltage controlled oscillator, the output of the two output ends is shaken
The signal that signal is positive voltage is swung, but the phase of the oscillator signal of POUT and NOUT outputs is opposite.
7th electric capacity C7 and the 8th electric capacity C8 capacitance is the first MOS capacitive reactance pipe C1 and the 2nd MOS capacitive reactance pipes C2 capacitance
1/10th, so as to ensure that the voltage controlled oscillator has wider frequency tuning range.
Describe the operation principle of voltage controlled oscillator provided by the invention in detail with reference to Fig. 2.
The phase noise of voltage controlled oscillator can be expressed as：
Wherein F is empirical coefficient；K is Boltzmann constant；T is absolute temperature；Δ ω is relative to carrier frequency ω0's
Deviation frequency；VmaxFor the voltage amplitude of resonance circuit；ReffFor effective resistance.It is pointed out that phase noise is smaller, it is voltage-controlled
The phase noise performance of oscillator is better.
Current source circuit is used for the electric current for producing voltage controlled oscillator work；
Resonance circuit is used to produce oscillator signal with negative resistance circuit；
Resonance circuit passes through the electric capacity in feedback circuit with oscillator signal caused by negative resistance resistance（C7 and C8）Feed back to electricity
HBT in current source circuit（Q3 and Q4）Base stage.Under the conditions of identical direct current biasing, VCO provided in an embodiment of the present invention
The current source circuit of device has smaller pressure drop than the current source circuit of voltage controlled oscillator in the prior art, so that the present invention is real
The voltage controlled oscillator for applying example has bigger output voltage amplitude.
By formula（1）Understand, the output voltage amplitude of voltage controlled oscillator is bigger, and its phase noise performance is just better.
The output voltage of voltage controlled oscillator provided in an embodiment of the present invention（The direct voltages of POUT and NOUT）Q3's or Q4
The pressure drop of base-emitter, so as to add the peak-to-peak value voltage of voltage controlled oscillator output, improve the phase of voltage controlled oscillator
Noiseproof feature.
Voltage controlled oscillator passes through feedback circuit HBT（Q1 and Q4）Base voltage there is similar phase, and then make
The electric current of voltage controlled oscillator reaches minimum value in its noise sensitive area, so as to improve the phase noise performance of voltage controlled oscillator.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention.Though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical scheme makes many possible changes and modifications, or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, the technical spirit according to the present invention is to any simple modification made for any of the above embodiments, equivalent
Change and modification, still fall within technical solution of the present invention protection in the range of.
Claims (9)
- A kind of 1. voltage controlled oscillator with low noise and big tuning range, it is characterised in that including：Resonance circuit, negative resistance electricity Road, current source circuit and feedback circuit；The resonance circuit, for producing the oscillator signal of voltage controlled oscillator, the resonance circuit is inductance and capacitance type resonance electricity Road, electric capacity therein use MOS capacitive reactance pipes；The negative resistance circuit, for producing negative resistance, just hindered caused by the resonance circuit with offsetting；The current source circuit, for producing the electric current of voltage controlled oscillator work；The feedback circuit, for oscillator signal caused by the resonance circuit to be fed back into the current source circuit；The feedback circuit includes：7th electric capacity and the 8th electric capacity；First output end of one end connection resonance circuit of the 7th electric capacity, the other end connect the first signal of current source circuit Input, for the first resonance signal by the 7th capacitive feedback to current source circuit, the other end of the 7th electric capacity is pressure First output end of controlled oscillator；Second output end of one end connection resonance circuit of the 8th electric capacity, the other end connect the secondary signal of current source circuit Input, for the second resonance signal by the 8th capacitive feedback to current source circuit, the other end of the 8th electric capacity is pressure Second output end of controlled oscillator.
- 2. the voltage controlled oscillator according to claim 1 with low noise and big tuning range, it is characterised in thatThe resonance circuit includes：Differential inductance, the first MOS capacitive reactances pipe, the 2nd MOS capacitive reactances pipe, the 3rd electric capacity, the 4th electric capacity, First resistor and second resistance；One end connection first node of the differential inductance, other end connection section point；The grid of the first MOS capacitive reactance pipes connects the 3rd node, and the first control voltage is connected together with drain electrode and source shorted；First control is connected together with the grid connection fourth node of the 2nd MOS capacitive reactance pipes, drain electrode and source shorted Voltage；One end of the first resistor connects the 3rd node, other end ground connection；One end of the second resistance connects the fourth node, other end ground connection；The both ends of 3rd electric capacity connect the first node and the 3rd node, the both ends point of the 4th electric capacity respectively The section point and the fourth node are not connected；The first node is the first phase contact of the resonance circuit and negative resistance circuit, exports the first resonance signal, described the Two nodes are the second phase contact of the resonance circuit and negative resistance circuit, export the second resonance signal.
- 3. the voltage controlled oscillator according to claim 1 with low noise and big tuning range, it is characterised in that described negative Resistance circuit includes：First bipolar transistor, the second bipolar transistor, 3rd resistor, the 4th resistance, the 5th electric capacity, the 6th Electric capacity and the 11st electric capacity；The base stage of first bipolar transistor connects the 5th node, and colelctor electrode connection first node, the first node is described First phase contact of negative resistance circuit and resonance circuit；The base stage of second bipolar transistor connects the 6th node, and colelctor electrode connection section point, the section point is described Second phase contact of negative resistance circuit and resonance circuit；The emitter stage of first bipolar transistor connects with the emitter stage of second bipolar transistor, the node to connect Output end phase contact as the input and current source circuit of the negative resistance circuit；One end of 3rd resistor connects the 5th node, and the other end connects the second control voltage；One end of 4th resistance connects the 6th node, and the other end connects second control voltage；One end of 5th electric capacity connects the first node, and the other end connects the 6th node；One end of 6th electric capacity connects the section point, and the other end connects the 5th node；The both ends of 11st electric capacity connect second control voltage and ground respectively.
- 4. the voltage controlled oscillator according to claim 1 with low noise and big tuning range, it is characterised in thatThe current source circuit includes：3rd bipolar transistor, the 4th bipolar transistor, the 5th resistance, the 6th resistance, Nine electric capacity and the tenth electric capacity；9th electric capacity of the base stage connection ground connection of the 3rd bipolar transistor, the base stage is the input of the first feedback signal End, the grounded emitter of the 3rd bipolar transistor；Tenth electric capacity of the base stage connection ground connection of the 4th bipolar transistor, the base stage is the input of the second feedback signal End, the grounded emitter of the 4th bipolar transistor；The colelctor electrode of 3rd bipolar transistor connects with the colelctor electrode of the 4th bipolar transistor, the node to connect Output end phase contact as the input and current source circuit of negative resistance circuit；One end of 5th resistance connects the base stage of the 3rd bipolar transistor, and the other end connects the 3rd control voltage；One end of 6th resistance connects the base stage of the 4th bipolar transistor, and the other end connects the 3rd control voltage.
- 5. the voltage controlled oscillator according to claim 2 with low noise and big tuning range, it is characterised in that described the The capacitance of three electric capacity and the 4th electric capacity is at least bigger 10 times than the capacitance of the first MOS capacitive reactances pipe and the 2nd MOS capacitive reactance pipes.
- 6. the voltage controlled oscillator according to claim 2 with low noise and big tuning range, it is characterised in that described the One MOS capacitive reactances pipe and the 2nd MOS capacitive reactance pipes work in accumulation area or depletion region.
- 7. the voltage controlled oscillator according to claim 3 with low noise and big tuning range, it is characterised in that described the One bipolar transistor and the second bipolar transistor are in positive workspace.
- 8. the voltage controlled oscillator according to claim 4 with low noise and big tuning range, it is characterised in that described the Three bipolar transistors and the 4th bipolar transistor are in positive workspace.
- 9. the voltage controlled oscillator according to claim 2 with low noise and big tuning range, it is characterised in that the 7th electricity Hold with the capacitance of the 8th electric capacity 1/10th of the capacitance for being the first MOS capacitive reactances pipe and the 2nd MOS capacitive reactance pipes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210360991.5A CN103684259B (en) | 2012-09-21 | 2012-09-21 | Voltage-controlled oscillator with low noise and large tuning range |
| US14/429,807 US9312808B2 (en) | 2012-09-21 | 2013-03-12 | Low-noise voltage-controlled oscillator |
| PCT/CN2013/072426 WO2014044029A1 (en) | 2012-09-21 | 2013-03-12 | Low-noise voltage-controlled oscillator |
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| CN201210360991.5A CN103684259B (en) | 2012-09-21 | 2012-09-21 | Voltage-controlled oscillator with low noise and large tuning range |
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| CN103684259B true CN103684259B (en) | 2018-03-23 |
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| KR102452619B1 (en) * | 2018-07-04 | 2022-10-07 | 삼성전자주식회사 | Integrated circuit with adaptability to pvt variation |
| CN110086903B (en) * | 2019-04-08 | 2020-11-13 | 维沃移动通信有限公司 | Resistance adjusting device and mobile terminal |
| EP4044427A4 (en) | 2019-10-31 | 2022-11-02 | Huawei Technologies Co., Ltd. | Oscillator circuit |
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| CN1450717A (en) * | 2002-04-10 | 2003-10-22 | 络达科技股份有限公司 | Voltage control oscillator with low phase noise |
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| US20080164955A1 (en) * | 2007-01-04 | 2008-07-10 | Pfeiffer Ullrich R | Voltage controlled oscillator circuits and methods using variable capacitance degeneration for increased tuning range |
| US8093958B2 (en) * | 2007-12-05 | 2012-01-10 | Integrated Device Technology, Inc. | Clock, frequency reference, and other reference signal generator with a controlled quality factor |
| CN101820250B (en) * | 2010-04-15 | 2012-05-30 | 复旦大学 | Wideband orthogonal dual-mode voltage controlled oscillator |
-
2012
- 2012-09-21 CN CN201210360991.5A patent/CN103684259B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1450717A (en) * | 2002-04-10 | 2003-10-22 | 络达科技股份有限公司 | Voltage control oscillator with low phase noise |
Non-Patent Citations (1)
| Title |
|---|
| 低相位噪声、宽调谐范围LC压控振荡器设计;曾健平 等;《电路与系统学报》;20080831;第13卷(第4期);第135-138页 * |
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