CN202841082U - Filter for inhibiting signal ring - Google Patents
Filter for inhibiting signal ring Download PDFInfo
- Publication number
- CN202841082U CN202841082U CN 201220524955 CN201220524955U CN202841082U CN 202841082 U CN202841082 U CN 202841082U CN 201220524955 CN201220524955 CN 201220524955 CN 201220524955 U CN201220524955 U CN 201220524955U CN 202841082 U CN202841082 U CN 202841082U
- Authority
- CN
- China
- Prior art keywords
- signal
- port
- filter
- cable
- potentiometer
- 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
Abstract
The utility model discloses a filter for inhibiting signal ring. The filter for inhibiting the signal ring is arranged on an output end of a signal resource and is connected with an oscilloscope. The filter comprises a T-type tee joint, an electric cable and a potentiometer. The T-type tee joint is composed of a first port, a second port and a third port. The first port is a signal input end and the third port is connected with the oscilloscope. One end of the electric cable is connected with the second port of the T-type tee joint. The potentiometer is connected with the other end of the electric cable. The filter for inhibiting the signal ring is capable of inhibiting the signals with high speed pulse from ringing in the process of transmission so that accuracy of measurement of the signals with the high speed pulse is improved.
Description
Technical field
The utility model relates to a kind of sig-nal-conditioning unit, relates in particular to a kind of filter.
Background technology
Pulse signal is a kind of discrete signal, and its shape is varied, compares with general analogue signal, discontinuous on time shaft between the waveform of pulse signal, that is to say that obvious interval is arranged between waveform and the waveform, have the advantages that certain periodicity is pulse signal.Pulse signal can be used for expression information, also can be used as carrier wave, and such as the pulse code modulation (pcm) in the pulse modulation, pulse width modulation (PWM) etc. can also be as the clock signal of various digital circuits, high performance chips.
The high-speed pulse signal is a kind of of pulse signal, in actual application, often need the high-speed pulse signal is measured, when measuring the high-speed pulse signal, because in the transmission course of signal, not the mating of impedance on the transmission path,, the high-speed pulse signal can come back reflective, therefore can see the signal ringing on oscilloscope.The sort signal ringing is unfavorable for the measurement of high-speed pulse signal, therefore need to try every possible means to remove.
Summary of the invention
The purpose of this utility model provides a kind of filter of Inhibitory signal ring, and this filter can the ringing of establishment high-speed pulse signal in transmission course, thereby improves the accuracy of pulse measure.
According to the foregoing invention purpose, the utility model proposes a kind of filter of Inhibitory signal ring, it is arranged on the output of signal source, and is connected with an oscilloscope, and this filter comprises:
One T-shaped threeway, it has the first port, the second port and the 3rd port, and wherein the first port is signal input part, and the 3rd port is connected with described oscilloscope;
One cable, the one end is connected with the second port of described T-shaped threeway;
One potentiometer, it is connected with the other end of described cable.
Further, in the filter of above-mentioned Inhibitory signal ring, the length L of described cable satisfies:
In the formula, T is the time interval that main signal arrives first reflection peak of bell signal, t
dBetween the group delay for cable.
In the filter of Inhibitory signal ring described in the utility model, T-shaped threeway is played signal and is distributed and the effect that mixes; Cable plays time-lag action, thereby regulates the time of Inhibitory signal; And potentiometer plays the effect of regulating Inhibitory signal intensity.
The operation principle of the filter of Inhibitory signal ring described in the utility model is: be divided into two the tunnel after measured signal arrives T-shaped threeway, one road signal is sent to the oscilloscope that is connected with T-shaped threeway, another road signal is sent on the cable, when the characteristic impedance of the resistance of potentiometer and cable is not mated, signal will be reflected back toward T-shaped threeway and measured signal superimposed, so the resistance of potentiometer has just determined amplitude size and the polarity of reflected signal.As long as choose the resistance of suitable cable length and potentiometer, just can allow the reflected signal of filter generation and the bell signal in the measured signal offset.
The course of work of the filter of above-mentioned Inhibitory signal ring is:
1. oscilloscope is directly delivered in measured signal, measured main signal to the time interval T of first reflection peak of bell signal;
2. according to t between the group delay of the T that measures and used cable
dCalculate the length L of used cable; And this cable is connected between T-shaped threeway and the potentiometer;
3. the filter with the Inhibitory signal ring is inserted in the measurement circuitry, and the resistance of regulator potentiometer can see that the amplitude of bell signal can change, and the resistance value of regulator potentiometer is until bell signal is minimum.
The reflected signal maximum that in general, can suppress when the resistance of potentiometer changes in 0 ~ 500 Ω scope is not less than 80%.
The filter construction of Inhibitory signal ring described in the utility model is simple, but can the ringing of establishment high-speed pulse signal in transmission course, thus improve the accuracy of pulse measure.
Description of drawings
Fig. 1 is the structural representation of filter under a kind of execution mode of Inhibitory signal ring described in the utility model.
Embodiment
Be described in further detail below in conjunction with Figure of description and the specific embodiment filter to Inhibitory signal ring described in the utility model.
As shown in Figure 1, in the present embodiment, the filter of this Inhibitory signal ring comprises: T-shaped threeway 1, and it has the first port, the second port and the 3rd port, and wherein the first port is signal input part, and the 3rd port is connected with oscilloscope 4; Cable 2, the one end is connected with the second port of T-shaped threeway 1, and the other end is connected with potentiometer 3.The length of cable 2 in the present embodiment
Wherein T is the time interval that main signal arrives first reflection peak of bell signal, t
dBetween the group delay for cable.
Please continue to consult Fig. 1, after arriving T-shaped threeway 1, measured signal P is divided into two the tunnel, one road signal is sent to the oscilloscope 4 that is connected with T-shaped threeway 1, another road signal is sent on the cable 2, when the resistance of potentiometer 3 and the characteristic impedance of cable 2 (in the present embodiment being 50 ohm) when not mating, it is superimposed with measured signal that signal will be reflected back toward T-shaped threeway 1, so the resistance of potentiometer 3 has just determined amplitude size and the polarity of reflected signal.As long as choose suitable cable length L and the resistance of potentiometer, just can allow the reflected signal of filter generation and the bell signal in the measured signal offset.
Therefore, the course of work of the filter of this Inhibitory signal ring is:
1. measured signal P is directly delivered to oscilloscope 4, measure main signal to the time interval T of first reflection peak of bell signal;
2. according to t between the group delay of the T that measures and cable 2
dCalculate the length L of cable; And cable 2 is connected between T-shaped threeway 1 and the potentiometer 3;
3. the filter with the Inhibitory signal ring is inserted in the measurement circuitry, and the resistance of regulator potentiometer 3 can see that the amplitude of bell signal can change, and the resistance value of regulator potentiometer is until bell signal is minimum.
Be noted that above enumerate only for specific embodiment of the utility model, obviously the utility model is not limited to above embodiment, and many similar variations are arranged thereupon.If those skilled in the art all should belong to protection range of the present utility model from all distortion that the disclosed content of the utility model directly derives or associates.
Claims (2)
1. the filter of an Inhibitory signal ring, it is arranged on the output of signal source, and is connected with an oscilloscope, it is characterized in that, and described filter comprises:
One T-shaped threeway, it has the first port, the second port and the 3rd port, and wherein the first port is signal input part, and the 3rd port is connected with described oscilloscope;
One cable, the one end is connected with the second port of described T-shaped threeway;
One potentiometer, it is connected with the other end of described cable.
2. the filter of Inhibitory signal ring as claimed in claim 1 is characterized in that, the length L of described cable satisfies:
In the formula, T is the time interval that main signal arrives first reflection peak of bell signal, t
dBetween the group delay for cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524955 CN202841082U (en) | 2012-10-12 | 2012-10-12 | Filter for inhibiting signal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220524955 CN202841082U (en) | 2012-10-12 | 2012-10-12 | Filter for inhibiting signal ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202841082U true CN202841082U (en) | 2013-03-27 |
Family
ID=47952676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220524955 Expired - Fee Related CN202841082U (en) | 2012-10-12 | 2012-10-12 | Filter for inhibiting signal ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202841082U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410390A (en) * | 2014-11-21 | 2015-03-11 | 中国科学院上海应用物理研究所 | Pulse type exponential decay sinusoidal signal generator and signal generating method thereof |
-
2012
- 2012-10-12 CN CN 201220524955 patent/CN202841082U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410390A (en) * | 2014-11-21 | 2015-03-11 | 中国科学院上海应用物理研究所 | Pulse type exponential decay sinusoidal signal generator and signal generating method thereof |
| CN104410390B (en) * | 2014-11-21 | 2017-03-01 | 中国科学院上海应用物理研究所 | Pulsed index attenuation sine signal generator and its signal generating method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103176059B (en) | A kind of measure the method for pulse width, device and cymometer | |
| CN104330120A (en) | Flow rate detection method for low-energy-consumption ultrasonic flow rate meter and system | |
| CN202841082U (en) | Filter for inhibiting signal ring | |
| CN109639345A (en) | A kind of cable bandwidth test method based on time domain reflectometry TDR technology | |
| CN101702617B (en) | High-precision +/-180 DEG digital phase distinguishing method and applying device thereof | |
| CN103297154A (en) | Method and device for detecting standing-wave ratio | |
| CN102519551A (en) | Ultrasonic liquid level measurer based on pseudo code relevant technology | |
| CN201903416U (en) | Torque and rotation speed processing circuit | |
| CN105157772B (en) | Timer expiration method and circuit and ultrasonic wave detecting system based on the circuit | |
| CN202276328U (en) | Signal generator capable of generating a plurality of super narrow pulses | |
| CN102568598B (en) | A kind of anti-interference method based on shift register | |
| CN205825890U (en) | The single-ended measurement system of wire length based on low voltage pulse reflection method | |
| CN204165597U (en) | For the echoed signal modulate circuit of flow quantity detecting system | |
| CN102141574B (en) | Portable turbine dynamic rotating speed measuring device and method | |
| CN108594311A (en) | A kind of harmonic source detection device and method based on magnetostriction cable | |
| CN104182708A (en) | Hybrid weighting type surface acoustic wave single-scale wavelet transform processor | |
| CN102564533A (en) | Ultrasonic liquid level measuring method based on pseudo-code correlation technique | |
| CN103353317B (en) | Based on ultra-large type caliber ultrasonic flow meter and the signal Enhancement Method thereof of TDC-GP22 | |
| CN202083707U (en) | Device based on phase difference method to measure ultrasonic wind speed and wind direction | |
| CN202974355U (en) | Ultrasonic flow measurement device | |
| CN207636133U (en) | A kind of analog-digital converter for ultrasonic gas flowmeter | |
| CN203811649U (en) | High-precision calibration signal source device | |
| CN106443248A (en) | Rapid and automatic measuring method for saturation characteristic of travelling wave tube | |
| CN205067647U (en) | Buzzer switches on testing arrangement | |
| EP3761508A3 (en) | Immediate fail detect clock domain crossing synchronizer |
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: 20130327 Termination date: 20151012 |
|
| EXPY | Termination of patent right or utility model |