CN201018456Y - Sine wave frequency divider - Google Patents
Sine wave frequency divider Download PDFInfo
- Publication number
- CN201018456Y CN201018456Y CNU2006201255441U CN200620125544U CN201018456Y CN 201018456 Y CN201018456 Y CN 201018456Y CN U2006201255441 U CNU2006201255441 U CN U2006201255441U CN 200620125544 U CN200620125544 U CN 200620125544U CN 201018456 Y CN201018456 Y CN 201018456Y
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- sine wave
- circuit
- frequency
- signal
- wave frequency
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Abstract
The utility model provides a sine wave frequency divider which comprises a counter circuit and a multi-order filter; wherein the sine wave signal source is inputted into the counter circuit, and the frequency dividing output of the counter circuit is connected with the multi-order filter. The utility model overcomes the complexity of realizing the sine wave frequency dividing circuit through the phase-locked loop circuit, directly realizes the frequency division for the sine wave signal through the comparatively simple circuit, and well restrains the high-order harmonic; the signal waveform is undistorted, and the precision of the output signal is the same with that of the input signal.
Description
Technical field
The utility model relates to a kind of sinusoidal wave frequency divider, the especially a kind of circuit design that can carry out frequency division (frequency division becomes the standard sine wave of 5MHz, 1MHz) by succinct circuit realization to the sine wave of 10-100MHz frequency range.
Background technology
If traditional frequency dividing circuit adopts trigger or counter,, and can not directly realize the frequency division of offset of sinusoidal ripple signal though comparatively simply we only can carry out frequency division with square-wave signal to circuit.
In addition, we also can adopt phase-locked loop circuit to realize sinusoidal wave frequency division: the 10MHz sine wave signal of input, through phase discriminator and loop filter circuit, produce voltage signal, this voltage signal control voltage controlled oscillator produces the sine wave signal of following the tracks of the input signal variation and changing, by the continuous feedback and tracking of phase-locked loop, finally export the standard sine wave signal of 5MHz and 1MHz again.And to produce the standard sine wave signal of 5MHz and 1MHz, we must design the such circuit of two covers.So the device that such phase-locked loop circuit not only adopts is many, design is complicated and strict to the passband of loop filter in design, phase-locked loop circuit itself can produce noise in addition, the noiseproof feature of the system many deficiencies such as give therefore that the product that relates to brings that many height, volume weight are big, cost is high, reliability is relatively poor relatively and electrical property consistency is bad as components and parts are required, complexity is keeped in repair comparatively in debugging that descend.
Summary of the invention
Utility model purpose: propose a kind of sinusoidal wave frequency divider, overcome the complexity that phase-locked loop circuit is realized sinusoidal wave frequency dividing circuit, adopt ball bearing made using comparatively directly to realize the frequency division of offset of sinusoidal ripple signal.
Technical solution of the present utility model is: sinusoidal wave frequency divider, the source sine wave signal is input to counter circuit, and the frequency division output of counter circuit connects multi-stage filter; The signal of source sine wave signal output is the square-wave signal through frequency division; Because the square wave of a certain frequency is made up of the first-harmonic of same frequency and numerous high order harmonic components, we only need be with a multi-stage filter with the high order harmonic component filtering, and the signal that then obtains has been the sine wave of this frequency just.Then handle through impedance matching, the signal that we exported is with the 5MHz of 50 Ω load capacity and 1MHz sine wave signal.
The selecting frequency filtering network that multi-stage filter is made up of RC filter circuit and capacitor and inductor constitutes.
Described multi-stage filter connects emitter follower V2 after by the RC filter circuit, and emitter follower output connects capacitor and inductor again and constitutes selecting frequency filtering network with the export resonance frequency match.
In the utility model, the sine wave signal amplitude of output is not subjected to the influence of input sine wave signal amplitude substantially: in the amplitude of the input signal interval range for-15dBm～13dBm, this design circuit can the realization amplitude be 7dBm ± 10% sine wave signal output all.
Characteristics of the present utility model are: in the circuit of realizing sinusoidal wave frequency splitting technology, the circuit of the present invention's design is very simple; Only adopt a small amount of conventional components and parts, low production cost; High order harmonic component obtains good restraining (the above harmonic wave inhibition of secondary degree reaches more than the 38dB), and signal waveform is undistorted, and the precision of output signal is equally high with the precision of input signal.
The utility model success is used in the reference device of certain type communication products synchro system.Facts have proved, the utility model adopt universal elements, simple, indicator consilience good, low production cost, superior electrical property and debugging and easy to maintenance.The utility model is widely used in promoting in the radio station of multiple model and communication equipment and adopts.
Description of drawings
Fig. 1 is a block diagram of the present utility model
Fig. 2 is a physical circuit of the present utility model
Embodiment
As shown in the figure: as input is the sine wave signal of 10MHz, it enters counter U1, from 3 pin of U1 (integrated package 74HC390), signal that 6 pin come out be respectively 5MHz, 1MHz square-wave signal; Wherein, the square-wave signal of 5MHz is sent into emitter follower V1 after passing through the RC filter circuit of being made up of R1, C5, and the selecting frequency filtering network of forming by C8, C9, L1, C10 obtains the 5MHz standard sine wave that we need again; The 1MHz square-wave signal that 6 pin come out is sent into emitter follower V2, and the selecting frequency filtering network of forming by C14, L2, C15, L3 obtains our needed 1MHz standard sine wave again.Signal behind the wave network reaches more than the 38dB the inhibition degree of high order harmonic component after filtration.The RC filter circuit of multi-stage filter and selecting frequency filtering network be C8, C9, L1, C10 and C14, L2, C15, L3 parameter selection for the export resonance frequency match.
In the utility model, transistor V1, V2 are emitter follower, its follow-up selecting frequency filtering network is to signal loss to some extent, thereby we will choose suitable biasing resistor on base stage, so that obtain suitable current gain, like this, behind signal process frequency-selective network, the standard sine wave signal amplitude of output is 7dBm ± 10%.V1, V2 to penetrate grade resistance to earth R4, a R7 be 51 Ω, play a part impedance matching, make this circuit possess ability with 50 Ω load impedances.
Claims (5)
1. sinusoidal wave frequency divider is characterized in that counter circuit and multi-stage filter composition, and the source sine wave signal is input to counter circuit, and the frequency division output of counter circuit connects multi-stage filter.
2. sinusoidal wave frequency divider according to claim 1 is characterized in that the selecting frequency filtering network that described multi-stage filter is made up of RC filter circuit and capacitor and inductor constitutes.
3. sinusoidal wave frequency divider according to claim 1 is characterized in that connecting emitter follower V2 after described multi-stage filter is by the RC filter circuit, and emitter follower output connects the selecting frequency filtering network of capacitor and inductor formation and export resonance frequency match again.
4. sinusoidal wave frequency divider according to claim 1 is characterized in that transistor is an emitter follower, and penetrating grade resistance to earth is 51 Ω.
5. according to claim 2 or 3 described sinusoidal wave frequency dividers, it is characterized in that the selecting frequency filtering network that selecting frequency filtering network is made up of inductance of connecting and electric capacity in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201255441U CN201018456Y (en) | 2006-11-29 | 2006-11-29 | Sine wave frequency divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201255441U CN201018456Y (en) | 2006-11-29 | 2006-11-29 | Sine wave frequency divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201018456Y true CN201018456Y (en) | 2008-02-06 |
Family
ID=39058955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201255441U Expired - Fee Related CN201018456Y (en) | 2006-11-29 | 2006-11-29 | Sine wave frequency divider |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201018456Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176004A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Method, device and frequency spectrum analyzer for providing sine wave clock |
| CN111865253A (en) * | 2020-07-08 | 2020-10-30 | 上海威固信息技术股份有限公司 | Program-controlled LC filter based on I2C protocol and sine wave generation method |
-
2006
- 2006-11-29 CN CNU2006201255441U patent/CN201018456Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176004A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Method, device and frequency spectrum analyzer for providing sine wave clock |
| CN111865253A (en) * | 2020-07-08 | 2020-10-30 | 上海威固信息技术股份有限公司 | Program-controlled LC filter based on I2C protocol and sine wave generation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: CO-PATENTEE TO: NANJING PANDA ELECTRONICS CO., LTD ^ |
|
| CU01 | Correction of utility model patent |
Correction item: Co-patentee Correct: Nanjing Panda Electronic Limited by Share Ltd Number: 06 Page: The title page Volume: 24 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Co-patentee Correct: Nanjing Panda Electronic Limited by Share Ltd Number: 06 Volume: 24 |
|
| ERR | Gazette correction |
Free format text: CORRECT: CO-PATENTEE; FROM: NONE ^ TO: NANJING PANDA ELECTRONICS CO., LTD ^ |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 Termination date: 20101129 |