CN2779722Y - Low-noise frequency multiplier - Google Patents
Low-noise frequency multiplier Download PDFInfo
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- CN2779722Y CN2779722Y CN 200520078635 CN200520078635U CN2779722Y CN 2779722 Y CN2779722 Y CN 2779722Y CN 200520078635 CN200520078635 CN 200520078635 CN 200520078635 U CN200520078635 U CN 200520078635U CN 2779722 Y CN2779722 Y CN 2779722Y
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- frequency multiplier
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Abstract
The utility model relates to a low noise frequency multiplier which comprises a crystal oscillator, a frequency multiplier 1, an amplifier 1, a frequency multiplier 2, an amplifier 2, a frequency multiplier 3, an amplifier 3, wherein the input end of the frequency multiplier 1 is connected with the output end of the crystal oscillator; the input end of the amplifier 1 is connected with the output end of the frequency multiplier 1; the input end of the frequency multiplier 2 is connected with the output end of the amplifier 1, and the input end of the amplifier 2 is connected with the output end of the frequency multiplier 2; the input end of the frequency multiplier 3 is connected with the output end of the amplifier 2, and the input end of the amplifier 3 is connected with the output end of the frequency multiplier 3. The utility model multiplies the frequency of the 100MHz crystal oscillator to 1.2GHz, by adopting passive devices, the utility model overcomes disadvantages of previous frequency multipliers and has smaller noise figure and higher isolation degree. The utility model has the advantages of reasonable design, simple structure, small size, lower noise, high isolation degree, pure spectrum, high signal-to-noise ratio, good using effect, avoidance of phase drift, etc., and can be used as the frequency multiplying parts of atomic clock phase-locked receivers, satellite receivers, etc.
Description
Technical field
The utility model belongs to radio high frequency technique field, is specifically related to the low noise frequency multiplier.
Background technology
The frequency multiplier of current atom clock phase-locked receive, satellite receiver adopts active device more, makes transistor be operated in the inelastic region, and pumping signal is become current impulse, has so just produced multiple harmonic.By frequency-selective circuit, select needed harmonic wave, then to reach the purpose of frequency multiplication.The major defect of this frequency frequency multiplier is: one produces multiple harmonic because pumping signal is become current impulse, and energy disperses, selected frequency-doubled signal a little less than, signal to noise ratio is lower; Its two since transistor be operated in the inelastic region, guarantee that the collector current pulse is enough big, to produce abundant harmonic wave, will strengthen ac-excited voltage, this power requirement to pumping signal is higher; It is three in order to obtain the less angle of flow, and transistor requires enough reverses biased, and components and parts are had relatively high expectations; This frequency multiplication mode mainly usefulness be active device, just increased additional noise, this noise occurs with the form of modulation frequency-doubled signal amplitude and phase place usually, though AM noise can suppress by amplitude limit, but the phase modulation noise is thoroughly to suppress, and the inductance in the frequency-selective circuit, electric capacity increase phase drift for the output of frequency multiplier with the temperature drift meeting.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the shortcoming of said frequencies multiplier, provides a kind of reasonable in design, compact conformation, volume is little, isolation is high, frequency spectrum is pure, signal to noise ratio is high, the low noise frequency multiplier of circuit reduction.
Solving the problems of the technologies described above the technical scheme that is adopted is that it comprises: crystal oscillator, frequency multiplier 1, amplifier 1, frequency multiplier 2, amplifier 2, frequency multiplier 3, amplifier 3, the output of the input termination crystal oscillator of frequency multiplier 1, amplifier 1 input termination connects the output of frequency multiplier 1, the output of the input termination amplifier 1 of frequency multiplier 2, the output of the input termination frequency multiplier 2 of amplifier 2, the output of the input termination amplifier 2 of frequency multiplier 3, the output of the input termination frequency multiplier 3 of amplifier 3.
The utility model is compared with frequency multiplier, it with the frequency multiplication of 100MHz crystal oscillator to 1.2GHz, the frequency signal of a high-purity frequency spectrum of output.Used the fundamental wave mixing principle, adopted passive device, overcome the drawback of frequency multiplier in the past, noise factor is less, and isolation is higher.Have reasonable in design, simple in structure, volume is little, noise is little, isolation is high, frequency spectrum is pure, signal to noise ratio is high, circuit reduction, debugging convenience, good reliability, result of use are good, avoided advantages such as phase drift, can be used for the frequency multiplication parts in atomic clock phase-locked receive, the satellite receiver etc.
Description of drawings
Fig. 1 is an electrical principle block diagram of the present utility model.
Fig. 2 is an electronic circuit schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
Fig. 1 has provided electrical principle block diagram of the present utility model, referring to Fig. 1.In Fig. 1, the low noise frequency multiplier of present embodiment is to be connected and composed by crystal oscillator, frequency multiplier 1, amplifier 1, frequency multiplier 2, amplifier 2, frequency multiplier 3, amplifier 3.The output of the input termination crystal oscillator of frequency multiplier 1, the output of amplifier 1 input termination frequency multiplier 1, the output of the input termination amplifier 1 of frequency multiplier 2, the output of the input termination frequency multiplier 2 of amplifier 2, the output of the input termination amplifier 2 of frequency multiplier 3, the output of the input termination frequency multiplier 3 of amplifier 3.The input of crystal oscillator is voltage-controlled voltage, deliver to frequency multiplier 1 from the 100MHz frequency signal of crystal oscillator output, frequency multiplier 1 with the 100MHz multiplied frequency signal to the 200MHz frequency signal, the 200MHz frequency signal outputs to frequency multiplier 2 after amplifier 1 amplifies, frequency multiplier 2 with the 200MHz multiplied frequency signal to the 400MHz frequency signal, the 400MHz frequency signal is delivered to frequency multiplier 3 after amplifier 2 amplifies, frequency multiplier 3 is with the frequency signal of 400MHz multiplied frequency signal to 1.2GHz, 1.2GHz frequency signal output after amplifying in amplifier 3, provide complete machine to use.
In Fig. 2, the crystal oscillator of present embodiment is made of integrated circuit U1, and the model of integrated circuit U1 is GPS-100B.2 pin of integrated circuit U1 are that input, output 4 pin connect frequency multiplier 1,3 pin and connect 12v positive source, 1 pin ground connection, and 4 pin output 100MHz frequency signal is to frequency multiplier 1.
The frequency multiplier 1 of present embodiment is connected and composed by integrated circuit U2, integrated circuit U3, integrated circuit U4, integrated circuit U5, and the model of integrated circuit U2, integrated circuit U3, integrated circuit U4 is PSC-2-1, and the model of integrated circuit U5 is TFM-2.4 pin, 5 pin that 1 pin of integrated circuit U2 meets integrated circuit U1 connect B1 is met integrated circuit U3 by B1 output, 6 pin 1 pin.5 pin of integrated circuit U3 connect B2 is met integrated circuit U4 by B2 output, 6 pin 1 pin.5 pin of integrated circuit U4 connect 4 pin of integrated circuit U5,1 pin that 6 pin meet integrated circuit U5,2,3,4,7, the 8 pin ground connection of integrated circuit U2 and integrated circuit U3 and integrated circuit U4.The 3 pin ground connection of integrated circuit U5,2 pin connect amplifier 1.1 pin of integrated circuit U2, integrated circuit U3, integrated circuit U4 is all imported the 100MHz frequency signal, 5 pin and 6 pin are all exported the 100MHz frequency signal, the two-way output 100MHz frequency signal of 5 pin of integrated circuit U2 and integrated circuit U3, use for complete machine, the 6 pin output 100MHz frequency signal of integrated circuit U2 and integrated circuit U3 uses for next stage.5 pin of integrated circuit U4,6 pin are exported 1,4 pin that the 100MHz frequency signal is delivered to integrated circuit U5 respectively, and the 200MHz frequency signal after the 2 pin output frequency multiplication of integrated circuit U5 is delivered to amplifier 1.
The amplifier 1 of present embodiment is connected and composed by triode T1, triode T2, R1～R8, C1～C5, coil L1, coil L2.Output 2 pin of the termination integrated circuit U 5 of C1 also pass through R1 ground connection, the base stage of another termination triode T1 and the end of coil L1, the other end of coil L1 connects the 12v positive source by R2 and coil L2 and R7 and by R3 ground connection, the base stage of the collector connecting transistor T2 of triode T1 and the end of R4, emitter connects the end of C2 and passes through R5 ground connection, the collector electrode of triode T2 connects the other end of R2 and R4, the end of C4 and coil L2, the emitter of triode T2 is by R6 ground connection and connect the end of C3 by R8, the other end of the termination coil L2 of C5, C2, C4, the other end ground connection of C5, another termination frequency multiplier 2 of C3.Amplifier 1 amplifies the 200MHz frequency signal after the frequency multiplication.R7, C4, C5, coil L2 connect into power-supply filter.Triode T2, R6, R8, C3 formation are penetrated a grade follower, are used to improve carrying load ability.200MHz frequency signal after the amplification is delivered to frequency multiplier 2.
The frequency multiplier 2 of present embodiment is connected and composed by integrated circuit U6, integrated circuit U7, integrated circuit U8, and the model of integrated circuit U6, integrated circuit U7 is PSC-2-1, and the model of integrated circuit U8 is TFM-2.The other end, 5 pin that 1 pin of integrated circuit U6 meets C3 connect B3 is met integrated circuit U7 by B3 output, 6 pin 1 pin, 5 pin of integrated circuit U7 connect 1 pin of integrated circuit U8,4 pin that 6 pin meet integrated circuit U8,2,3,4,7, the 8 pin ground connection of integrated circuit U6 and integrated circuit U7, the 3 pin ground connection of integrated circuit U8,2 pin connect amplifier 2.1 pin of integrated circuit U6 and integrated circuit U7 is all imported the 200MHz frequency signal, the 200MHz of the 5 pin output of integrated circuit U6 uses for complete machine, 5,6 pin of integrated circuit U7 are exported the 200MHz frequency signal respectively and are delivered to 1,4 pin of integrated circuit U8 and carry out frequency multiplication, and the 400MHz frequency signal after the 2 pin output frequency multiplication of integrated circuit U8 is delivered to amplifier 2.
The amplifier 2 of present embodiment is connected and composed by triode T3, triode T4, R9～R15, C6～C10, coil L3, coil L4, coil L5.2 pin of the termination integrated circuit U8 of C6 and by R9 and coil L3 ground connection, the base stage of another termination triode T3 and the end of coil L4, the other end of coil L4 is by R10 and coil L5 and R15 connects the 12v positive source and by R11 ground connection.The base stage of the collector connecting transistor T4 of triode T3 and an end, the emitter of R12 connect the end of C7 and pass through R13 ground connection, the collector electrode of triode T4 connects the end of the other end, C9 and the coil L5 of R10 and R12, the emitter of triode T4 connects the end of C8 and passes through R14 ground connection, the other end ground connection of C7, C9, C10, another termination frequency multiplier 3 of C8.R15, C9, C10, coil L5 connect into power-supply filter.Triode T4, R14, C8 formation are penetrated a grade follower, are used to improve carrying load ability.Amplifier 2 amplifies the 400MHz frequency signal after the frequency multiplication, and the 400MHz frequency signal after the amplification is delivered to frequency multiplier 3.
The frequency multiplier 3 of present embodiment is connected and composed by integrated circuit U9～integrated circuit U12, coil L6, the model of integrated circuit U9 is PSC-2-1, the model of integrated circuit U10 is SK-2, and the model of integrated circuit U11 is TFM-2, and the model of integrated circuit U12 is LB-503.1 pin of integrated circuit U9 connects 4 pin that the other end of C8,1 pin that 5 pin meet integrated circuit U10 and 2 pin, 6 pin meet integrated circuit U11,2,3,4,7, the 8 pin ground connection of integrated circuit U9, the 3 pin ground connection of integrated circuit U10 and integrated circuit U11,4 pin of integrated circuit U10 and 1 pin of integrated circuit U11 are by coil L6 ground connection, 2 pin of integrated circuit U11 connect the input of integrated circuit U12, the output termination amplifier 3 of integrated circuit U12.1 pin of integrated circuit U9 is the frequency signal of 400MHz frequency signal input end, 6 pin output 400MHz 4 pin of delivering to integrated circuit U11,1 pin and 2 pin that 5 pin output 400MHz frequency signal is delivered to integrated circuit U10.The 4 pin output 800MHz frequency signal of integrated circuit U10 is delivered to 1 pin of U11.The 1 pin input 800MHz of integrated circuit U1 1,4 pin input 400MHz, 2 pin output 1.2GHz frequency signal are delivered to integrated circuit U12, and integrated circuit U12 is a passive filter, can filter side frequency.Coil L6 is used to suppress low frequency.Deliver to amplifier 3 by the filtered 1.2GHz frequency signal of integrated circuit U12.
The amplifier 3 of present embodiment is made of integrated circuit U13, and the model of integrated circuit U13 is ZFL-2000.The output of the input termination integrated circuit U12 of integrated circuit U13, integrated circuit U12 amplifies the 1.2GHz frequency signal of input, uses for complete machine, by the output of B4 end.
Claims (3)
1, a kind of low noise frequency multiplier, it is characterized in that it comprises: crystal oscillator, frequency multiplier 1, amplifier 1, frequency multiplier 2, amplifier 2, frequency multiplier 3, amplifier 3, the output of the input termination crystal oscillator of frequency multiplier 1, amplifier 1 input termination connects the output of frequency multiplier 1, the output of the input termination amplifier 1 of frequency multiplier 2, the output of the input termination frequency multiplier 2 of amplifier 2, the output of the input termination amplifier 2 of frequency multiplier 3, the output of the input termination frequency multiplier 3 of amplifier 3.
2, according to the described low noise frequency multiplier of claim 1, it is characterized in that said amplifier 1 is: output 2 pin of the integrated circuit U5 of the termination frequency multiplier 1 of C1 also pass through R1 ground connection, the base stage of another termination triode T1 and the end of coil L1, the other end of coil L1 connects the 12v positive source by R2 and coil L2 and R7 and by R3 ground connection, the base stage of the collector connecting transistor T2 of triode T1 and the end of R4, emitter connects the end of C2 and passes through R5 ground connection, the collector electrode of triode T2 connects the other end of R2 and R4, the end of C4 and coil L2, the emitter of triode T2 is by R6 ground connection and connect the end of C3 by R8, the other end of the termination coil L2 of C5, C2, C4, the other end ground connection of C5, another termination frequency multiplier 2 of C3.
3, according to the described low noise frequency multiplier of claim 1, it is characterized in that said amplifier 2 is: output 2 pin of the integrated circuit U8 of the termination frequency multiplier 2 of C6 and by R9 and coil L3 ground connection, the base stage of another termination triode T3 and the end of coil L4, the other end of coil L4 connects the 12v positive source by R10 and coil L5 and R15 and by R11 ground connection, the base stage of the collector connecting transistor T4 of triode T3 and the end of R12, emitter connects the end of C7 and passes through R13 ground connection, the collector electrode of triode T4 connects the other end of R10 and R12, the end of C9 and coil L5, the emitter of triode T4 connects the end of C8 and passes through R14 ground connection, C7, C9, the other end ground connection of C10, another termination frequency multiplier 3 of C8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078635 CN2779722Y (en) | 2005-04-18 | 2005-04-18 | Low-noise frequency multiplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078635 CN2779722Y (en) | 2005-04-18 | 2005-04-18 | Low-noise frequency multiplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2779722Y true CN2779722Y (en) | 2006-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520078635 Expired - Fee Related CN2779722Y (en) | 2005-04-18 | 2005-04-18 | Low-noise frequency multiplier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124922A (en) * | 2014-07-31 | 2014-10-29 | 中国科学院上海微系统与信息技术研究所 | 3mm-waveband signal source and application thereof |
-
2005
- 2005-04-18 CN CN 200520078635 patent/CN2779722Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124922A (en) * | 2014-07-31 | 2014-10-29 | 中国科学院上海微系统与信息技术研究所 | 3mm-waveband signal source and application thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |