CN205232197U - Pulse signal source based on FPGA and 10MHz constant temperature crystal oscillator - Google Patents
Pulse signal source based on FPGA and 10MHz constant temperature crystal oscillator Download PDFInfo
- Publication number
- CN205232197U CN205232197U CN201521018194.4U CN201521018194U CN205232197U CN 205232197 U CN205232197 U CN 205232197U CN 201521018194 U CN201521018194 U CN 201521018194U CN 205232197 U CN205232197 U CN 205232197U
- Authority
- CN
- China
- Prior art keywords
- fpga
- crystal oscillator
- temperature crystal
- frequency
- 10mhz
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
The utility model relates to a pulse signal source based on FPGA and 10MHz constant temperature crystal oscillator, it is by constituteing with consecutive 10MHz constant temperature crystal resonator, the inside phase -locked loop of FPGA, frequency divider module, the frequency multiplier module of the signal of telecommunication. The utility model discloses utilize inside phase -locked loop of FPGA and 10MHz constant temperature crystal oscillator, realized high accuracy high stability pulse signal source low -costly, can set up output frequence wantonly in certain frequency range.
Description
Technical field
The utility model relates to a kind of high precision high stability degree pulse signal source module based on FPGA and 10MHz constant-temperature crystal oscillator, by the frequency translation of fpga chip, the high accurate clock signal of 10MHz is transformed into the high accurate clock signal of multi-frequency.
Background technology
FPGA and field programmable gate array, it is the product substantially further developed at programming devices such as PAL, GAL, EPLD.It occurs as a kind of semi-custom circuit in integrated circuit (ASIC) field of effect, has both solved the deficiency of determining circuit, has overcome again the shortcoming that original programming device gate circuit number is limited.
In Electronic Design, often need an oscillation source as the clock reference of whole system, common crystals and oscillating circuit are conventional oscillation sources, but the frequency of oscillation of common crystals and oscillating circuit is all easily subject to the impact of ambient temperature.Constant-temperature crystal oscillator has the ability of resisting temperature interference, can in different ambient temperatures stable oscillation stationary vibration frequency, the pulse signal source of high accuracy, high stability is the benchmark of electronic equipment accuracy of measurement, particularly conclusive especially in the measurement relevant to time parameter.Due in manufacturing cost, the constant-temperature crystal oscillator specification on market is less, and common only has 10M, 20M etc., obtain the stabilizing clock of other frequency, and cost is often very large, sometimes even cannot obtain.
Summary of the invention
Technical problem underlying to be solved in the utility model is: provide a kind of high precision high stability degree pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator, can be produced the high-precision oscillating source of various various criterion frequency by this signal source.
The technical scheme that the utility model solves the employing of its technical problem is: be made up of the 10MHz constant-temperature crystal oscillator device be connected successively with the signal of telecommunication, the inner phase-locked loop of FPGA, allocator module, frequency multiplier module.
Described 10MHz constant-temperature crystal oscillator device, adopts SYN025-10MHz.
Described fpga chip, adopts EP2C5T144C8N.
Described allocator module, it is 10X/YMHz that the clock frequency that phase-locked loop exports is carried out the square-wave signal frequency that frequency division exports by it, and frequency X and divide ratio Y is integer.
Described frequency multiplier module, input signal is stablized the output of frequency multiplication by it, and frequency is 1-65535.
The utility model compared with prior art has following main advantage:
The utility model produces the clock signal of 10MHz standard frequency by the constant-temperature crystal oscillator of 10M, produces the high-precision oscillating source of multiple standard frequency, such as conventional 1Hz, 32768Hz, 8MHz, 12MHz etc. through the frequency translation of FPGA.Be very suitable for clock request high, cost requirement is low, the occasion that can work alone.
Utilize the FPGA (Field Programmable Gate Array) of FPGA and phase-locked loop and 10MHz constant-temperature crystal oscillator, achieve high precision high stability degree pulse signal source at low cost.Within the scope of certain frequency, output frequency can be set arbitrarily.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Embodiment
The utility model is a kind of high precision high stability degree pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator, its principal character is the clock signal being produced 10MHz standard frequency by the constant-temperature crystal oscillator of 10MHz, then is produced the high-precision oscillating source of multiple standard frequency by the frequency translation of FPGA.Such as conventional 1Hz, 32768Hz, 8MHz, 12MHz etc.The pulse signal source of high accuracy, high stability is the benchmark of electronic equipment accuracy of measurement, particularly conclusive especially in the measurement relevant to time parameter.Due in manufacturing cost, constant-temperature crystal oscillators most is on the market all 10MHz, obtain the stabilizing clock of other frequency, and cost is often very large, sometimes even cannot obtain.The utility model utilizes the inner phase-locked loop of FPGA and phase-locked loop and 10MHz constant-temperature crystal oscillator, achieves high precision high stability degree pulse signal source at low cost.Within the scope of certain frequency, output frequency can be set arbitrarily.
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
The high precision high stability degree pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator that the utility model provides, as shown in Figure 1: be made up of the 10MHz constant-temperature crystal oscillator device be connected successively with the signal of telecommunication, the inner phase-locked loop of FPGA, allocator module, frequency multiplier module.
Described 10MHz constant-temperature crystal oscillator device, can commercially buy, the 10MHz constant-temperature crystal oscillator device etc. of such as SYN025-10MHz or other high precision high stability degree.This constant-temperature crystal oscillator device produces the clock signal of the 10MHz of standard, by pressure limiting circuit, clock signal crest voltage is limited to 3.3V.Stability and the precision of the stability of all output pulses and precision and 10MHz constant-temperature crystal oscillator device are consistent.
Described pressure limiting circuit is made up of current-limiting resistance and 3.3V voltage-stabiliser tube.
Described fpga chip, can commercially buy, such as EP2C5T144C8N or other inner fpga chip etc. containing phase-locked loop.This chip includes phase-locked loop, phase-locked loop input signal is the clock signal of the 10MHz that constant-temperature crystal oscillator produces, input clock signal can frequency multiplication be exported by inner phase-locked loop, frequency can configure, the output clock frequency of phase-locked loop is 10X (X is frequency) MHz, and clock signal is as the system clock of FPGA.
Described allocator module, under coordinating with fpga chip (EP2C5T144C8N), the clock frequency that phase-locked loop exports can be carried out frequency division, the divide ratio changing allocator module can export the standard block signal of multiple different frequency, suppose that divide ratio is Y, then output signal frequency is 10X/Y (X and Y is integer) MHz.
Described frequency multiplier module, under coordinating with fpga chip (EP2C5T144C8N), the signal that allocator module exports can be carried out stable frequency multiplication, Clock Multiplier Factor is 1-65535, if frequency divider exports the square wave of 1Hz standard frequency, the square wave of 1-65535Hz standard frequency can be exported by the Clock Multiplier Factor changing frequency multiplier.Suppose that Clock Multiplier Factor is Z (span 1-65535), divide ratio is Y, then frequency multiplier exports square-wave signal frequency is 10X*Z/YMHz.Variable frequency range: 0.5Hz ~ 320MHz, this variable frequency range is not necessarily continuous.
The above-mentioned high precision high stability degree pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator that the utility model provides, its course of work is: the programmable logic cells and the clock phase-locked loop that utilize fpga chip inside, frequency multiplication and frequency division are carried out to the clock signal of fpga chip, thus obtains various different clock signal.Because the clock signal exported all comes from the work clock of fpga chip, therefore using constant-temperature crystal oscillator as the clock of fpga chip, thus ensure that stability and the precision of all output signals.
Claims (5)
1., based on a pulse signal source for FPGA and 10MHz constant-temperature crystal oscillator, it is characterized in that being made up of the 10MHz constant-temperature crystal oscillator device be connected successively with the signal of telecommunication, the inner phase-locked loop of FPGA, allocator module, frequency multiplier module.
2. the pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator according to claim 1, is characterized in that described 10MHz constant-temperature crystal oscillator device, adopts SYN025-10MHz constant-temperature crystal oscillator device.
3. the pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator according to claim 1, is characterized in that described fpga chip, adopts EP2C5T144C8N chip.
4. the pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator according to claim 1, it is characterized in that described allocator module, it is 10X/YMHz that the clock frequency that phase-locked loop exports is carried out the square-wave signal frequency that frequency division exports by it, and frequency X and divide ratio Y is integer.
5. the pulse signal source based on FPGA and 10MHz constant-temperature crystal oscillator according to claim 1, is characterized in that described frequency multiplier module, and input signal is stablized the output of frequency multiplication by it, and frequency is 1-65535.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018194.4U CN205232197U (en) | 2015-12-10 | 2015-12-10 | Pulse signal source based on FPGA and 10MHz constant temperature crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521018194.4U CN205232197U (en) | 2015-12-10 | 2015-12-10 | Pulse signal source based on FPGA and 10MHz constant temperature crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205232197U true CN205232197U (en) | 2016-05-11 |
Family
ID=55907239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521018194.4U Expired - Fee Related CN205232197U (en) | 2015-12-10 | 2015-12-10 | Pulse signal source based on FPGA and 10MHz constant temperature crystal oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205232197U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494398A (en) * | 2018-03-30 | 2018-09-04 | 广东圣大电子有限公司 | A kind of design method and source of X-band ultralow phase noise frequency source |
| CN109962830A (en) * | 2017-12-26 | 2019-07-02 | 中国船舶重工集团公司七五〇试验场 | A kind of efficient CAN interface based on FPGA |
-
2015
- 2015-12-10 CN CN201521018194.4U patent/CN205232197U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109962830A (en) * | 2017-12-26 | 2019-07-02 | 中国船舶重工集团公司七五〇试验场 | A kind of efficient CAN interface based on FPGA |
| CN108494398A (en) * | 2018-03-30 | 2018-09-04 | 广东圣大电子有限公司 | A kind of design method and source of X-band ultralow phase noise frequency source |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9379714B1 (en) | Circuits and methods of TAF-DPS vernier caliper for time-of-flight measurement | |
| CN102118160B (en) | Circuit and method for generating clock signal | |
| CN106569544B (en) | Real-time timepiece chip and its clock correcting method, device | |
| CN102435842B (en) | Device for comparing double-mode frequency scales and measuring frequency stability | |
| US10884041B2 (en) | Physical quantity measurement apparatus, electronic apparatus, and vehicle | |
| CN102332914B (en) | C-waveband frequency comprehensive generator with low phase noise | |
| CN107819456B (en) | High-precision delay generator based on FPGA carry chain | |
| CN102638247B (en) | Clock generating method and clock generating circuit for CMOS (complementary metal oxide semiconductor) without crystal oscillator | |
| CN108061848B (en) | method and system for measuring additive carry chain delay based on FPGA | |
| CN105867107A (en) | Low-power high-precision time service system | |
| US8344814B2 (en) | Circuit and method for generating a clock signal | |
| CN205232197U (en) | Pulse signal source based on FPGA and 10MHz constant temperature crystal oscillator | |
| CN103891148A (en) | Electronic oscillation circuit | |
| US8890591B1 (en) | Circuit and method of using time-average-frequency direct period syntheszier for improving crystal-less frequency generator frequency stability | |
| CN202495917U (en) | CMOS clock generating circuit without using crystal oscillator | |
| CN103546124B (en) | A kind of signal trigger instants value acquisition device | |
| CN208999990U (en) | Real random number generator | |
| CN103354448B (en) | Based on the high resolution time interval generation system of FPGA | |
| CN105352627A (en) | Temperature detection system and detection method thereof | |
| CN114070267B (en) | Digital fingerprint generation circuit, digital fingerprint generation method and electronic equipment | |
| CN107733369A (en) | Temperature compensating crystal oscillator | |
| CN104407511B (en) | Multipath timing module and method for acquiring timing system signal without accumulated errors | |
| CN105811971A (en) | Counter-based variable frequency clock source and FPGA device | |
| CN204065907U (en) | A kind of MCU chip frequency-dividing clock means for correcting | |
| CN202206371U (en) | C wave band low-phase noise frequency comprehensive generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20161210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |