CN201226510Y - Paste type pressure control oscillator - Google Patents
Paste type pressure control oscillator Download PDFInfo
- Publication number
- CN201226510Y CN201226510Y CNU2007200563577U CN200720056357U CN201226510Y CN 201226510 Y CN201226510 Y CN 201226510Y CN U2007200563577 U CNU2007200563577 U CN U2007200563577U CN 200720056357 U CN200720056357 U CN 200720056357U CN 201226510 Y CN201226510 Y CN 201226510Y
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- oscillating circuit
- voltage
- capacitor
- circuit
- triode
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Abstract
The utility model provides a mounted-type voltage controlled oscillator which adopts a clapp oscillating circuit and comprises a negative resistance oscillating circuit, a bias circuit, a buffer output and matching network and an audio modulation circuit. The negative resistance circuit includes an oscillating circuit and a tunable voltage controlled oscillating circuit. The oscillating circuit and the tunable voltage controlled oscillating circuit are connected in series, and a a varactor diode D1 in the tunable voltage controlled oscillating circuitre is used for oscillating frequency tuning. The utility model is low in product fabrication cost, small in volume and cheap in price, has a higher range of working frequency, and meets the selection requirements for the voltage controlled oscillator for the wireless communication product.
Description
Technical field
The utility model relates to a kind of oscillator, relates in particular to a kind of pasting type voltage controlled oscillator.
Background technology
(Voltage Controlled Oscillator is that a kind of its shakes frequency with the oscillator that adds the control change in voltage VCO) to voltage control oscillator, and is tuning in order to the fast frequency of realizing phase-locked loop control (PLL) and other frequency synthesis source circuit.Voltage control oscillator is an element commonly used, is widely used in the communication microwave component of phase-locked loop control (PLL) numerical frequency phase-locked loop circuit in the radio communication product.High-tech areas such as, CDMA logical and GSM mobile handset as military and civil radio, cordless telephone, wireless microphone, local telephone network.
The cost of small integrated pasting type voltage controlled oscillator is higher at present, and volume is bigger, and price is expensive, and operating frequency range is also lower.Frequency generation source is the requisite component parts of most of electronic systems, the core of wireless communication system especially.And the microwave component of now communicating by letter not only need have very high operating frequency, and the requirement of miniaturization, lightweight, high performance, multifunction, low power consumption and cost degradation aspect is improved constantly and urgent day by day.
Summary of the invention
The utility model provides a kind of patch-type voltage-controlled oscillator (VCO), adopts a carat general oscillating circuit, and makes voltage-controlled device by variable capacitance diode and change its control voltage and realize adjusting to MVF series voltage control oscillator frequency of oscillation.
The utility model provides a kind of pasting type voltage controlled oscillator, adopt a carat general oscillating circuit, comprise negative resistance oscillating circuit, biasing circuit, buffering output and matching network, audio modulating circuit, it is characterized in that: described negative resistance oscillating circuit comprises concussion loop and tunable voltage-controlled oscillating circuit, described concussion loop and described tunable voltage-controlled oscillating circuit are cascaded, and it is tuning to carry out frequency of oscillation by the variable capacitance diode D1 in the tunable voltage-controlled oscillating circuit.
Preferably, described concussion loop is made of inductance L 2, capacitor C 3, C4, C5, C6 and triode Q1; After described inductance L 2 and described capacitor C 3 are in parallel, connect with described capacitor C 4, described triode Q1 and capacitor C 6; Described capacitor C 6 one ends are connected other end ground connection with described triode Q1 emitter; Described capacitor C 5 one ends are connected with the base stage of described triode Q1, and the other end is connected with emitter.
Preferably, described tunable voltage-controlled oscillating circuit comprises variable capacitance diode D1 and external control voltage VT, and described variable capacitance diode D1 connects with external control voltage VT.
Preferably, the oscillator signal of described triode Q1 is exported by emitter and capacitor C 10 couplings, output RF signal after triode Q2 buffering.
Preferably, described inductance L 2 can adopt microstrip line or the coaxial harmonic shock device of being printed by printing board PCB of medium.
Advantage of the present utility model is:
1, the work concussion frequency range of EASUM series voltage control oscillator VCO product is from 650-980MHz, and operating frequency range is higher;
2, this oscillator adopts silicon monolithic voltage control oscillator VCO chip, and other element adopts SMD 0402 encapsulation, and PCB adopts the design of 4 laminates, gross thickness 0.6mm; Because the equal printed board microstrip line of circuit inductance element is made, and saves PCB design space and cost of manufacture;
3, to have a volume little for this oscillator, and apparent size is 9*7*2mm only, is applicable to surface mount process, and apparent size is identical and alternative with external like product with pin function.
Description of drawings
Accompanying drawing 1 mounts the schematic diagram of voltage-controlled oscillator (VCO) basic circuit diagram for the utility model;
Accompanying drawing 2 is the utility model phase-locked loop control (PLL) circuit diagram;
The theory diagram that accompanying drawing 3 is formed for the utility model phase-locked loop control (PLL);
Embodiment
Come specific embodiment of the utility model is described below in conjunction with accompanying drawing.
The MVF of the utility model embodiment series pasting type voltage controlled oscillator basic circuit is seen Fig. 1, below its operation principle is:
MVF series voltage control oscillator VCO adopts a carat general oscillating circuit, and makes voltage-controlled device with variable capacitance diode and change its control voltage and just can realize that voltage control oscillator shakes the adjusting of frequency.
The utility model provides a kind of pasting type voltage control oscillator, adopt a carat general oscillating circuit, comprise negative resistance oscillating circuit, biasing circuit, buffering output and matching network, audio modulating circuit, described negative resistance oscillating circuit comprises concussion loop and tunable voltage-controlled oscillating circuit, described concussion loop and described tunable voltage-controlled oscillating circuit are cascaded, and it is tuning to carry out frequency of oscillation by the variable capacitance diode D1 in the tunable voltage-controlled oscillating circuit.
Wherein said concussion loop comprises inductance L 2, capacitor C 3, capacitor C 4, capacitor C 5, capacitor C 6 and triode Q1.After described inductance L 2 and described capacitor C 3 are in parallel, connect with described capacitor C 4, described triode Q1 and capacitor C 6; Described capacitor C 6 one ends are connected other end ground connection with described triode Q1 emitter; Described capacitor C 5 one ends are connected with the base stage of triode Q1, and the other end is connected with the emitter of triode Q1.Described inductance L 2 adopts by printing board PCB prints microstrip line; Preferably, printing micro belt line width is 11.6mm.
Described tunable voltage-controlled oscillating circuit comprises that variable capacitance diode D1 and external control voltage VT constitute.Described variable capacitance diode D1 connects with external control voltage VT.Described variable capacitance diode D1 can adopt the Japanese variable capacitance diode 1SV284 of Toshiba.
In above-mentioned voltage control oscillator VCO circuit, when tuning voltage (VT) 0.5～4.5V, RF concussion frequency range is about 60MHz.
Triode Q1 oscillator signal is exported by emitter-base bandgap grading, after capacitor C 10 couplings, and output RF signal after triode Q2 buffering.The equal printed board microstrip line of VCO circuit inductance element is made simultaneously, saves PCB design space and product cost.
Because the loss major part of actual harmonic shock circuit is produced by inductance, therefore in order to improve the Q value of harmonic shock circuit, need to use the low-loss inductance, so present embodiment adopts low-loss microstrip line of high Q value or the coaxial harmonic shock device of medium to substitute common inductance.
Voltage control oscillator VCO circuit has the high stability electric property with reference to the negative resistance circuit principle design.
As shown in Figure 2, U1MB 1502 PLL Phase Lock Loop IC in the present embodiment circuit, wherein X1 is the fundamental frequency crystal oscillator, MB 1502 the 9th pin CLOCK, the 10th pin DATA, the 11st pin LC respectively with the CPU serial communication, and by CPU setting program adjustment frequency dividing ratio, and the frequency and the phase place of the inner oscillator signal of reference signal control loop of the outside input of utilization.
Above-mentioned phase-locked loop is made up of phase discriminator PD, loop filter LF and voltage-controlled oscillator (VCO) VCO three parts, and the theory diagram that phase-locked loop is formed as shown in Figure 3.
Phase-locked loop work process in, when output signal frequency equates with the frequency of input signal, the phase difference value that output voltage and input voltage are maintained fixed, promptly output voltage and input voltage are lockable.
MB 1502 the 8th pin Fin is voltage control oscillator VCO concussion frequency output terminal mouth.
Voltage control oscillator VCO power supply VCC connects+the 3V/5V D.C. regulated power supply, need isolate with three-terminal voltage-stabilizing circuit and CPU, PLL Phase Lock Loop IC and other circuit of 3V or 5V, and handle power supply ac filter and high frequency bypass at input/output terminal with electric capacity.
VCO RF output inserts Phase Lock Loop IC MB 1502 the 8th pin Fin end and digital spectrum analysis instrument RF input interface by capacitor C 1 100P.
The voltage-controlled oscillator (VCO) that the utility model embodiment provides has advantages such as operating frequency height, excellent performance, volume be small; Indexs such as technical parameter all reach external like product; And the external like product of price is low.Concrete advantage shows as: the work concussion frequency range of (1), EASUM series VCO product is from 650-980MHz; (2), this oscillator adopts silicon monolithic VCO chip, other element adopts SMD 0402 encapsulation, PCB adopts the design of 4 laminates, gross thickness 0.6mm; (3), this oscillator has that volume is little, apparent size is 9*7*2mm only, is applicable to surface mount process; Apparent size is identical and alternative with external like product with pin function.
The voltage-controlled oscillator (VCO) that the utility model embodiment provides has adopted the innovation of a series of core technologies, is illustrated with regard to the key technical indexes below:
1, low-work voltage: 3V/5V; Low-power consumption :≤7mA.
2, low phase noise (C/N):
(1), phase noise (C/N) (At 10KHz Offset)≤-100dBc/Hz
(2), phase noise (C/N) (At 100KHz Offset)≤-120dBc/Hz
3, good electricity is transferred characteristic: output-power fluctuation is less than 5 ℅ in the VCO earthquake bandwidth.
4, operating temperature range-20～+ 75 ℃
5, index such as technical parameter all reaches like products such as Japan, Taiwan.
Technical specification parameter to the utility model embodiment product is specifically described below:
1, the description of the utility model embodiment product:
Model NO.:MVF-850 (model)
1.Electrical Characteristics (characteristic electron)
1.1 Operating Frequency (VT=0.5V) (operating frequency) ≦ 785MHz (VT=4.5V) ≧ 915MHz
1.2 Tuning Sensitivity (tuning sensitivity) 25MHz/V
1.3 Power Output (power output) 0 ± 3dBm
1.4?Pushing?Figure(VCC＝2.84±0.2V) Within±1.0MHz(Vcc＝3.0±0.25V，REF＝3.0V)
1.5 Pulling Figure (pull-in feature) Within ± 1.0MHz (VSWR=2.0, For All Phase, Ref.=50 Ω)
1.6 Modulation sensitivity (modulation sensitivity) 50 ± 20mVrms (fs=1.0kHz, fdev=30kHz)
(Offset irrelevance) BPF=0.3～3kHz De-emphasis=off
1.7?Phase?Noise(C/N)(At?10KHz?Offset)
(phase noise) ≦-97dBc/Hz
1.8 Phase Noise (C/N) (At 100KHz Offset) (phase noise) ≦-120dBc/Hz
1.9 Input Capacitance (input capacitance) ≦ 47pF
1.10 Load Impedance (load impedance) 50 Ω.
2. Ratings (rated value)
2.1 Supply Voltage (VCC) (operating voltage) 2.84 ± 0.2V
2.2 Supply Current (operating current) ≦ 7mA
2.3 Tuning Voltage (VT) (tuning voltage) 0.5～4.5V
2.4 Operating Frequency (frequency range) 830～920MHz
2.5 Operating Temperature Range (operating temperature range)-20～+ 85 ℃
2.6 Supply Voltage (operating voltage) 4V
2.7 Storage Temperature (storage temperature)-40～+ 85 ℃
3. Housing (structure)
3.1 Dimensions (size) 9*7*2 (Max) mm
2, Delta voltage-controlled oscillator (VCO) specifications
Model: DMP-VCX748S6
1. characteristic electron
1.1 operating frequency (VT=0.5V) ≦ 741MHz
(VT＝2.2V)≧755MHz
(VT＝1.35V) 748+/-6MHZ
1.2 tuning sensitivity 12 ± 3MHz/V
1.3 power output (VT=0V～3V)-8 ± 3dBm
1..4 deviant (max.) (VCC=2.84 ± 0.2V) ± 2.0MHz
1.5 pulling figure (max.) 4.0MHz (VSWR=2.0:1, For All Phase, Ref.=50 Ω)
1.7 phase noise (C/N) (At 10KHz Offset) ≦-93dBc/Hz
1.8 phase noise (C/N) (At 100KHz Offset) ≦-113dBc/Hz
1.9 spurious response frequency (2nd Harmonics) ≦-18dbc
1.10 Shu goes into Dian Rong ≦ 47Pf
1.11 load impedance 50 Ω
2. rated value
2.1 operating voltage (VCC) 2.84 ± 0.2V
2.2 Gong makes Dian Liu ≦ 5mA
2.3 tuning voltage (VT) 0.5～2.2V
2.4 frequency range 741～755MHz
2.5 operating temperature range-20～+ 75Y ℃
2.6
2.6.1 operating voltage 4V
2.6.2 storage temperature-35～+ 85Y ℃
3. structure
3.1 sheathing material nickeline
3.2 size 8*6*1.55mm
Show that by above specification data indexs such as technical parameter of the present utility model all reach advanced world standards.Can satisfy domestic and international demand to voltage-controlled oscillator (VCO).
Above disclosed only is preferred embodiment of the present utility model, can not limit the interest field of the utility model certainly with this, and therefore the equivalent variations of being done according to the utility model claim still belongs to the scope that the utility model is contained.
Claims (5)
1, a kind of pasting type voltage controlled oscillator, adopt a carat general oscillating circuit, it comprises negative resistance oscillating circuit, biasing circuit, buffering output and matching network, audio modulating circuit, it is characterized in that: described negative resistance oscillating circuit comprises concussion loop and tunable voltage-controlled oscillating circuit, described concussion loop and described tunable voltage-controlled oscillating circuit are cascaded, and it is tuning to carry out frequency of oscillation by the variable capacitance diode D1 in the tunable voltage-controlled oscillating circuit.
2, pasting type voltage controlled oscillator as claimed in claim 1 is characterized in that: described concussion loop is made of inductance L 2, capacitor C 3, C4, C5, C6 and triode Q1;
After described inductance L 2 and described capacitor C 3 are in parallel, connect with described capacitor C 4, described triode Q1 and capacitor C 6; Described capacitor C 6 one ends are connected other end ground connection with described triode Q1 emitter; Described capacitor C 5 one ends are connected with the base stage of described triode Q1, and the other end is connected with emitter.
3, pasting type voltage controlled oscillator as claimed in claim 1 is characterized in that: described tunable voltage-controlled oscillating circuit comprises variable capacitance diode D1 and external control voltage VT, and described variable capacitance diode D1 connects with external control voltage VT.
4, pasting type voltage controlled oscillator as claimed in claim 2 is characterized in that: the oscillator signal of described triode Q1 is exported by emitter and capacitor C 10 couplings, output RF signal after triode Q2 buffering.
5, pasting type voltage controlled oscillator as claimed in claim 2 is characterized in that: described inductance L 2 adopts the microstrip line of being printed by printing board PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200563577U CN201226510Y (en) | 2007-08-31 | 2007-08-31 | Paste type pressure control oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200563577U CN201226510Y (en) | 2007-08-31 | 2007-08-31 | Paste type pressure control oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201226510Y true CN201226510Y (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200563577U Expired - Fee Related CN201226510Y (en) | 2007-08-31 | 2007-08-31 | Paste type pressure control oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201226510Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457226A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | 57 GHz voltage controlled oscillator used for millimeter wave communication |
| CN102457227A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | 40 GHz voltage controlled oscillator used for millimeter wave communication |
| CN108365823A (en) * | 2018-03-21 | 2018-08-03 | 电子科技大学 | A kind of voltage-controlled change capacitive circuit of big variable compression ratio based on field-effect tube |
| CN109061282A (en) * | 2018-11-06 | 2018-12-21 | 叶志刚 | A kind of superhigh precision measurement method of faint d. c. voltage signal |
-
2007
- 2007-08-31 CN CNU2007200563577U patent/CN201226510Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457226A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | 57 GHz voltage controlled oscillator used for millimeter wave communication |
| CN102457227A (en) * | 2010-10-19 | 2012-05-16 | 中国科学院微电子研究所 | 40 GHz voltage controlled oscillator used for millimeter wave communication |
| CN102457227B (en) * | 2010-10-19 | 2014-04-02 | 中国科学院微电子研究所 | 40 GHz voltage controlled oscillator used for millimeter wave communication |
| CN102457226B (en) * | 2010-10-19 | 2014-06-18 | 中国科学院微电子研究所 | 57 GHz voltage controlled oscillator used for millimeter wave communication |
| CN108365823A (en) * | 2018-03-21 | 2018-08-03 | 电子科技大学 | A kind of voltage-controlled change capacitive circuit of big variable compression ratio based on field-effect tube |
| CN108365823B (en) * | 2018-03-21 | 2021-12-03 | 电子科技大学 | Voltage-controlled varactor circuit of big varactor ratio based on field effect transistor |
| CN109061282A (en) * | 2018-11-06 | 2018-12-21 | 叶志刚 | A kind of superhigh precision measurement method of faint d. c. voltage signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090422 Termination date: 20100831 |