CN1322315C - Noise interference resistant position or angle signal processing circuit - Google Patents
Noise interference resistant position or angle signal processing circuit Download PDFInfo
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- CN1322315C CN1322315C CNB2004100079378A CN200410007937A CN1322315C CN 1322315 C CN1322315 C CN 1322315C CN B2004100079378 A CNB2004100079378 A CN B2004100079378A CN 200410007937 A CN200410007937 A CN 200410007937A CN 1322315 C CN1322315 C CN 1322315C
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Abstract
The present invention relates to a noise interference resistance position or angle signal processing circuit. The noise interference resistance processing circuit comprises an edge detecting circuit, a state holding circuit, a holding time generating circuit and a multitask device. The present invention provides a noise interference resistance position / angle processing circuit, and two noise interference resistance processing circuits of the present invention are connected with each other in series or in parallel. The input signals of the processing circuits of the present invention are square signals (A and B) of which the positions or the angles are associated and the phase difference is 90 DEG. When the edge of the signal A occurs, the signal B maintains the original value for some time, and otherwise, the signal B is directly output; likewise, when the edge of signal B occurs, the signal A maintains the original value for some time, and otherwise, the signal A is directly output; thereby, when the position or angle sensor is subjected to the noise interference, the counter can not generate accumulated errors when the two signals are subjected to the noise interference at the same time.
Description
Technical field
The present invention disturbs treatment circuit relevant for a kind of interference resistant.Position or angle signal processing circuit that the particularly relevant a kind of interference resistant of the present invention disturbs.
Background technology
See also the application synoptic diagram of the position/angles sensor of Fig. 1, wherein position/angles sensor 12 can be optics chi, scrambler, laser interferometer etc.It is 90 ° numeral (square wave) signal A and B that position/angles sensor 12 is output as two phase differential, and position or angle that variation of the standard of signal A and signal B and 12 measurements of position/angles sensor are come out have direct relation, and wherein signal A and signal B's takes the lead or the backward moving direction of representing position/angles sensor 12.Counter 14 be used for the adding up amount of movement of position/angles sensor 12 is with moving of real time reaction determinand.Display 16 is used for showing the position or the angle of present determinand, and control system 18 is then used the mobile status of real-time change as controls such as location or constant speed.Display 16 can be machine tool etc. and opens circuit system, and control system 18 can be the feedback device of service system.
Fig. 2 is the constitutional diagram of counter 14 when reading signal A and signal B among Fig. 1.First representation signal A in the one of four states, second position representation signal B.If two signal A and B are changed to clockwise direction among the figure, the count value of counter adds one, otherwise if counterclockwise, count value then subtracts one.For example when count value was 5, the state of signal A and signal B was all 0 (state 00) originally, supposes that the state of signal A changes to 1 (state 10), and count value can add one because this is changed to clockwise direction, becomes 6.
Fig. 3 is that signal A and signal B change the synoptic diagram that concerns with the counter outgoing position.As time point t1 to time point t2 the time, the position/angles sensor is that positive dirction moves, so 90 ° of the square waves of the square wave leading edge signal B of signal A.Counter all makes count value add one when the edge of each signal A or signal B produces, and the expression position/angles moves a unit toward positive dirction.As shown in the figure, in the period, the position moves to 5 by 1 at this section.Similarly, between the time point t3, the position/angles sensor is toward moving in the other direction at time point t2, so 90 ° of the square waves of the square wave leading edge signal A of signal B, and determinand is retracted position 1 by position 5.
Owing to often use heavy-duty motor machinery such as discharging processing machine or computer numerical control (Computer Numerical Control in the application scenario of position/angles sensor; CNC) lathe etc.Such environment can produce very big noise interference for the electronic circuit of position/angles sensor internal, make the square wave of position/angles signal of sensor A and signal B the pulse wave (glitch) do not expect occur, therefore the count value of counter and the physical location of determinand have cumulative errors, directly influence the output of display or the usefulness of control system.
A kind of method in common that interference resistant disturbs is to utilize wave filter to filter the higher noise of frequency.Waveform I shows original digital signal (square wave) among Fig. 4, and waveform J then is filtered analog waveform, and waveform K converts digital waveform to by waveform J to form.Because through the digital signal behind the wave filter delay is arranged, digital waveform K and original waveform I have the delay Td1 of rise time, and the difference of the delay Td2 of fall time.Therefore, not only because of postponing to make speed slack-off, in addition, the duration of these two delays is also inequality, the error in the time of can causing computing velocity in practical application for wave filter.
And because the relation of position/angles sensor application occasion can't effectively be used the anti-system method of noise commonly used such as ground connection or shielding, the pulse wave that produces because of noise of analytic signal A and signal B square wave is to the influence of counter, to improve the fiduciary level of control system accurately.
Summary of the invention
Purpose of the present invention just is to propose a kind of interference resistant and disturbs treatment circuit, is used for handling the pulse wave that is produced because of the noise interference.
Another object of the present invention is to provide a kind of treatment circuit, be applicable in position or the angular transducer, can prevent effectively that system makes counter produce cumulative errors because of noise disturbs the pulse wave that produces.
For reaching above-mentioned purpose, the invention provides a kind of interference resistant and disturb treatment circuit, receive two digital signals (square wave), first input signal and second input signal, and avoid second input signal and first input signal to be subjected to the interference of noise simultaneously according to the state of first input signal, produce circuit and multiplexer comprising edge detection circuit, state retaining circuit, retention time.The edge detection circuit receives first input signal, and when positive edge that detects first input signal or negative edge, produces trigger pip to state retaining circuit and retention time and produce circuit.The value of second input signal is exported and kept to state retaining circuit when receiving trigger pip.It is to be used for the output holding time signal that retention time produces circuit, and the retention time signal can produce a pulse wave when receiving trigger pip, the pulse wave (glitch) that its width can produce greater than noise disturbs.Multiplexer then produces the retention time signal of circuit output according to the retention time, produce circuit and switch the output valve of second input signal or state retaining circuit to output.
The position/angles signal processing circuit that the present invention more provides a kind of interference resistant to disturb, comprise that above-mentioned interference resistant disturbs treatment circuit, comprise that more the second edge detection circuit, second state retaining circuit, second retention time produce the circuit and second multiplexer.The second edge detection circuit is used for receiving second input signal, and when positive edge that detects second input signal or negative edge, produces second trigger pip to the second state retaining circuit and second retention time generation circuit.The value of first input signal is exported and kept to second state retaining circuit when receiving second trigger pip.It is to be used for exporting the second retention time signal that second retention time produced circuit, and the second retention time signal can produce a pulse wave when receiving second trigger pip, the pulse wave that its width can produce greater than noise disturbs.Second multiplexer then is according to the second retention time signal, produces circuit and switches the output valve of first input signal or second state retaining circuit to output.
The present invention more provides a kind of use series connection (cascade) mode that two interference resistants are disturbed the treatment circuit combination, makes second edge detection circuit in the treatment circuit receive the output of multiplexer in first treatment circuit.
Interference resistant of the present invention disturbs treatment circuit to may be implemented in the position/angles sensor, promotes the application system fiduciary level.First input signal of treatment circuit of the present invention and second input signal have direct relation with the position/angles that the position/angles sensor measures out, and the leading or backward moving direction of representing the position/angles sensor between these two input signals.Position/angles sensor of the present invention can be an optics chi, scrambler or laser interferometer etc.
In addition, except disturbing treatment circuit to be implemented in the position/angles sensor interference resistant of the present invention, also this can be handled the prime treatment circuit of circuit as the position/angles counter.The output of two multiplexers in the counter treatment in accordance with the present invention circuit, the position or the angle that add up and obtain determinand.
Interference resistant provided by the present invention disturbs treatment circuit, two digital signals of receiving position/angular transducer output, and effectively anti-system makes counter produce cumulative errors because of noise disturbs the pulse wave that produces.Can not produce delay via the digital signal after the processing circuit processes of the present invention, and frequency range is also unaffected.
Description of drawings
Fig. 1 is the application synoptic diagram of position/angles sensor;
Fig. 2 is the constitutional diagram of counter when reading signal A and signal B among Fig. 1;
The relation of signal A and signal B variation and counter outgoing position in Fig. 3 displayed map 1;
Fig. 4 display digit signal utilize wave filter filter before with afterwards waveform;
Fig. 5 A, 5B, 5C show because of noise and disturb the pulse wave that produces three kinds of examples to the influence of counter;
Fig. 6 is the calcspar that the interference resistant of the embodiment of the invention disturbs treatment circuit;
Fig. 7 is the output waveform that the digital signal of Fig. 5 B originally obtains behind the process treatment circuit of the embodiment of the invention;
Fig. 8 A is the calcspar that the interference resistant that utilizes the parallel way combination of the embodiment of the invention disturbs treatment circuit;
Fig. 8 B is the calcspar that the interference resistant that utilizes the series system combination of the embodiment of the invention disturbs treatment circuit;
Fig. 9 is the output waveform that the digital signal of Fig. 5 C originally obtains behind the process treatment circuit of the embodiment of the invention;
Figure 10 shows that the interference resistant of the embodiment of the invention disturbs a kind of circuit diagram of treatment circuit.
Symbol description:
A, B～digital signal (square wave of sensor output)
G1～G6～signal A, B disturbs the pulse wave that produces because of noise
Time delay behind Td1, Td2～process filter
The duration of Thld～retention time signal HLD
12～position/angles sensor
14～counter
16～display
18～control system
60～interference resistant disturbs treatment circuit
61～edge detection circuit
62～state retaining circuit
63～retention time produces circuit
64～multiplexer
81,85～the second edge detection circuit
82,86～the second state retaining circuits
83,87～the second retention times produced circuit
84,88～the second multiplexers
The logical circuitry of 101～edge detection circuit
The logical circuitry of 102～state retaining circuit
103～retention time produces the logical circuitry of circuit
The logical circuitry of 104～multiplexer
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended diagram, be described in detail below.
Fig. 5 A to Fig. 5 C is three possibility examples that digital signal A and B are subjected to different noise influences, wherein the noise of the signal A of Fig. 5 A and signal B disturbs the pulse wave G1 and the G2 that are produced to stagger mutually, can be forward or move a position backward in the position of being read, still correct position can be got back at last, and cumulative errors can't be caused.For example among the figure under two noise pulse waves disturb, counter still obtains the result of correct position 2.But if the example shown in Fig. 5 B and Fig. 5 C, the noise of signal A and signal B overlaps, just can allow counter miscount the position.The noise that the noise of signal B disturbs pulse wave G4 to occur in signal A among Fig. 5 B disturbs before the pulse wave G3, causes counter to calculate four positions more, with former should be that the meter of position 2 becomes position 6.And opposite, if the noise of signal A disturbs the noise of pulse wave G5 leading edge signal B to disturb pulse wave G6 among the image pattern 5C, counter just can calculate four positions less, with former should be that the meter of position 8 becomes position 4.
Therefore interference resistant proposed by the invention disturbs treatment circuit, by eliminating the pulse wave that shown in Fig. 5 B and Fig. 5 C, can cause cumulative errors, avoid two input signals to be subjected to the interference of noise simultaneously, the mistake that causes counter when the sensing station that adds up changes, to be caused.Interference resistant of the present invention disturbs the treatment circuit can binding site/angular transducer, produce two digital signal A, the B that not disturbed by noise, perhaps as the prime treatment circuit of input signal A, the B of position/angles counter, with the application system fiduciary level of raised position or angular transducer.
Fig. 6 shows the circuit framework calcspar that disturbs treatment circuit 60 according to the interference resistant of the embodiment of the invention, and this handles circuit 60 and comprises that an edge detection circuit 61, state retaining circuit 62, a retention time produce circuit 63 and a multiplexer 64.Digital signal A and signal B are the output square-wave signal of position/angles sensor.On the opportunity that the positive edge of edge detection circuit 61 detection signal B or negative edge take place, the retention time signal HLD that the retention time produces circuit 63 outputs produces one section time delay Thld greater than the noise pulse bandwidth when edge detection circuit 61 triggers.As shown in Figure 7, the duration of Thld is longer than the duration of the noise interference pulse wave G4 of signal B among the retention time signal HLD.State retaining circuit 62 is then remembered the value Pre_A of signal A at that time when edge detection circuit 61 triggers, and this value Pre_A is used as output.Multiplexer 64 is used for selecting output signal A_OUT, when edge-triggered, produce the output HLD of circuit 63 according to the retention time, the output Pre_A of output state holding circuit within a period of time Thld, then direct at ordinary times output signal A is to avoid output delay of output signal.
Fig. 7 is the output waveform of digital signal waveform behind the treatment circuit of the embodiment of the invention of process Fig. 6 of Fig. 5 B originally.When the edge of the noise interference waveform G4 of signal B took place, the edge detection circuit 61 of Fig. 6 can trigger state retaining circuits 62 and the retention time produces circuit 63.State retaining circuit 62 can be exported the value of the signal A when being triggered, and it is the pulse wave of Thld at back generation one width that is triggered then that the retention time produces circuit 63, and Thld can be set at the pulse bandwidth that produces greater than because of noise.The output of state retaining circuit 62 is chosen in the input that this pulse wave Thld switches multiplexer 64 simultaneously, and the noise of therefore original signal A disturbs pulse wave G3 to be eliminated.Treatment circuit of the present invention can allow the noise pulse wave of two input signal A, B can not take place simultaneously, and counter also so not has cumulative errors, still gets back to position 2 as the counter of Fig. 7 after noise disturbs pulse wave.
If the situation of Fig. 5 C takes place, just when the noise of input signal A disturbs the noise of pulse wave G5 leading edge signal B to disturb pulse wave G6, the treatment circuit of Fig. 6 is can't erasure signal A or one of them noise interference pulse wave of signal B.Therefore the present invention more discloses and utilizes two treatment circuits as shown in Figure 6, with the combination of serial or parallel connection mode.Fig. 8 A is the embodiment of the parallel connection combination of two treatment circuits of the present invention, and Fig. 8 B then is the embodiment of the tandem compound of two treatment circuits.The treatment circuit 60 of top is identical with the treatment circuit of Fig. 6 among Fig. 8 A, and second treatment circuit of below is just intercoursed two input signal A, B of top circuit, just allow positive edge or the negative edge of the second edge detection circuit, 81 detection signal A, make the output B_OUT of its second multiplexer produce circuit 83, select the value of output signal B or keep the value (output of second state retaining circuit 82) of signal B when the second edge detection circuit 81 detects positive edge or negative edge according to second retention time.
Fig. 8 B shows that second treatment circuit is with the treatment circuit 60 of series system in conjunction with script Fig. 6, therefore the second edge detection circuit 85 receives the output A_OUT of multiplexer 64, positive edge or negative edge by detecting A_OUT, trigger second state retaining circuit 86 and second retention time generation circuit 87, and utilize second multiplexer 88 to select the value of direct output signal B or the value of signal B when being triggered of keeping by second state retaining circuit 86.Utilize the interference resistant of Fig. 8 A or Fig. 8 B to disturb treatment circuit, the situation of Fig. 5 C before can solving.As shown in Figure 9, when the noise of signal A disturbs pulse wave G5 to disturb early generation of pulse wave G6 than the noise of signal B, the treatment circuit 60 of script can't disturb pulse wave to eliminate one of them noise among Fig. 8 A or Fig. 8 b, the noise of signal B can be disturbed pulse wave G6 disappear, allow the position of counter still can get back to correct position 8 by second treatment circuit.
Figure 10 is a kind of circuit diagram of the treatment circuit of the embodiment of the invention shown in Figure 6.The edge detection circuit 61 of the circuit corresponding diagram 6 within the square 101 wherein, the retention time of the circuit corresponding diagram 6 within the square 103 produces circuit 63, the state retaining circuit 62 of the circuit corresponding diagram 6 within the square 102, the circuit within the last square 104 is the multiplexer 64 of corresponding diagram 6 then.Edge detection circuit 101 triggers retention time generation circuit 103 and state retaining circuit 102 by signal CLKT2B, and the signal HLD that retention time generation circuit 103 produces reaches multiplexer 104, and allowing multiplexer 104 select output A_OUT is the output Pre_A of signal A or state value preserving circuit 102.
Claims (23)
1. an interference resistant disturbs treatment circuit, it is characterized in that described interference resistant disturbs treatment circuit to receive one first input signal and one second input signal, avoid this second input signal and this first input signal to be subjected to the interference of noise pulse wave simultaneously according to the state of this first input signal, this treatment circuit comprises:
One edge circuit for detecting receives this first input signal, and when the positive edge of detecting this first input signal or negative edge, produces a trigger pip;
The value of this second input signal is exported and kept to one state retaining circuit when receiving this trigger pip of this edge detection circuit generation;
One retention time produced circuit, was used for exporting a retention time signal, and this retention time signal produces the pulse wave of a predetermined width when receiving this trigger pip of this edge detection circuit generation; And
One multiplexer according to the retention time signal of this retention time generation circuit output, produces circuit and switches the output valve of this second input signal or this state retaining circuit to output.
2. interference resistant according to claim 1 disturbs treatment circuit, and it is characterized in that: this first input signal and this second input signal are all digital signal.
3. the position/angles signal processing circuit disturbed of an interference resistant is characterized in that this treatment circuit comprises:
One position/angles sensor, the moving direction of detecting position/angles, and export one first input signal and one second input signal;
One interference resistant disturbs treatment circuit, receives this first input signal and this second input signal, avoids this second input signal and this first input signal to be subjected to the interference of noise pulse wave simultaneously according to the state of this first input signal; And
One counter is coupled to this interference resistant and disturbs treatment circuit, the amount of movement of calculating location/angle;
Wherein, this interference resistant disturbs treatment circuit to comprise:
One first edge detection circuit receives this first input signal, and when positive edge that detects this first input signal or negative edge, produces one first trigger pip;
The value of this second input signal is exported and kept to one first state retaining circuit when receiving this first trigger pip of this first edge detection circuit generation;
One first retention time produced circuit, was used for exporting one first retention time signal, and this first retention time signal produces the pulse wave of a predetermined width when receiving this first trigger pip of this first edge detection circuit generation; And
One first multiplexer according to this first retention time signal of this first retention time generation circuit output, produces circuit and switches the output valve of this second input signal or this first state retaining circuit to output.
4. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs is characterized in that this interference resistant disturbs treatment circuit more to comprise:
One second edge detection circuit receives this second input signal, and when positive edge that detects this second input signal or negative edge, produces one second trigger pip;
The value of this first input signal is exported and kept to one second state retaining circuit when receiving this second trigger pip of this second edge detection circuit generation;
One second retention time produced circuit, was used for exporting one second retention time signal, and this second retention time signal produces the pulse wave of a predetermined width when receiving this second trigger pip of this second edge detection circuit generation; And
One second multiplexer according to this second retention time signal of this second retention time generation circuit output, produces circuit and switches the output valve of this first input signal or this second state retaining circuit to output.
5. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs is characterized in that: this first input signal and this second input signal are that two phase differential are 90 °, represent the digital signal of position/angles.
6. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs is characterized in that: this interference resistant disturbs treatment circuit to be implemented in this position/angles sensor, to promote the application system fiduciary level.
7. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs is characterized in that: this first input signal and this second input signal have direct relation with the position/angles that this position/angles sensor measures out.
8. the position/angles signal processing circuit that interference resistant according to claim 7 disturbs is characterized in that: the leading or backward moving direction of representing this position/angles sensor of this first input signal and this second input signal.
9. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs, it is characterized in that: this position/angles sensor is an optics chi.
10. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs, it is characterized in that: this position/angles sensor is a scrambler.
11. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs, it is characterized in that: this position/angles sensor is a laser interferometer.
12. the position/angles signal processing circuit that interference resistant according to claim 3 disturbs is characterized in that: this interference resistant disturbs treatment circuit when implementing, and is the prime treatment circuit of this counter.
13. the position/angles signal processing circuit that interference resistant according to claim 4 disturbs, it is characterized in that: this counter is according to the output of this first multiplexer and this second multiplexer, the position/angles that adds up up till now.
14. the position/angles signal processing circuit that interference resistant disturbs is characterized in that, comprising:
One position/angles sensor, the moving direction of detecting position/angles, and export one first input signal and one second input signal;
One interference resistant disturbs treatment circuit, receives this first input signal and this second input signal, avoids this second input signal and this first input signal to be subjected to the interference of noise pulse wave simultaneously according to the state of this first input signal; And
One counter is coupled to this interference resistant and disturbs treatment circuit, the amount of movement of calculating location/angle;
Wherein, this interference resistant disturbs treatment circuit to comprise:
One first edge detection circuit receives this first input signal, and when positive edge that detects this first input signal or negative edge, produces one first trigger pip;
The value of this second input signal is exported and kept to one first state retaining circuit when receiving this first trigger pip of this first edge detection circuit generation;
One first retention time produced circuit, was used for exporting one first retention time signal, and this first retention time signal produces the pulse wave of a predetermined width when receiving this first trigger pip of this first edge detection circuit generation;
One first multiplexer according to this first retention time signal of this first retention time generation circuit output, produces circuit and switches the output valve of this second input signal or this first state retaining circuit to output;
One second edge detection circuit receives the output of this first multiplexer, and when the positive edge of the output that detects this first multiplexer or negative edge, produces one second trigger pip;
The value of this first input signal is exported and kept to one second state retaining circuit when receiving this second trigger pip of this second edge detection circuit generation;
One second retention time produced circuit, was used for exporting one second retention time signal, and this second retention time signal produces the pulse wave of a predetermined width when receiving this second trigger pip of this second edge detection circuit generation; And
One second multiplexer according to this second retention time signal of this second retention time generation circuit output, produces circuit and switches the output valve of this first input signal or this second state retaining circuit to output.
15. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs is characterized in that: this first input signal and this second input signal are that two phase differential are the square wave of 90 ° of expression position/angles.
16. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs is characterized in that: this interference resistant disturbs treatment circuit to be implemented in this position/angles sensor, to promote the application system fiduciary level.
17. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs is characterized in that: this first input signal and this second input signal have direct relation with the position/angles that this position/angles sensor measures out.
18. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs is characterized in that: the leading or backward moving direction of representing this position/angles sensor of this first input signal and this second input signal.
19. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs, it is characterized in that: this position/angles sensor is an optics chi.
20. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs, it is characterized in that: this position/angles sensor is a scrambler.
21. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs, it is characterized in that: this position/angles sensor is a laser interferometer.
22. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs, wherein this interference resistant disturbs treatment circuit when implementing, and is the prime treatment circuit of this counter.
23. the position/angles signal processing circuit that interference resistant according to claim 14 disturbs, it is characterized in that: this position/angles counter is according to the output of this first multiplexer and this second multiplexer, the position/angles that adds up up till now.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100079378A CN1322315C (en) | 2004-03-05 | 2004-03-05 | Noise interference resistant position or angle signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100079378A CN1322315C (en) | 2004-03-05 | 2004-03-05 | Noise interference resistant position or angle signal processing circuit |
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| Publication Number | Publication Date |
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| CN1664507A CN1664507A (en) | 2005-09-07 |
| CN1322315C true CN1322315C (en) | 2007-06-20 |
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| CNB2004100079378A Expired - Fee Related CN1322315C (en) | 2004-03-05 | 2004-03-05 | Noise interference resistant position or angle signal processing circuit |
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| CN (1) | CN1322315C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI630405B (en) * | 2017-04-13 | 2018-07-21 | 黃秀媛 | Laser jammer |
| TWI630406B (en) * | 2017-04-13 | 2018-07-21 | 黃秀媛 | Laser jammer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115587B (en) * | 2012-11-30 | 2015-05-13 | 济南海能仪器股份有限公司 | Number representation device of rotary encoder |
| CN109374021B (en) * | 2018-10-30 | 2020-10-30 | 广州发展集团股份有限公司 | Anti-interference physical quantity acquisition system, method and device and computer equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547667A (en) * | 1981-04-13 | 1985-10-15 | Tokyo Kogaku Kikai Kabushiki Kaisha | Displacement measuring device utilizing an incremental code |
| US5257210A (en) * | 1989-09-28 | 1993-10-26 | Endress U. Hauser Gmbh U. Co. | Processor for processing sensor signals to obtain a desired transfer behavior |
| US5579247A (en) * | 1991-02-15 | 1996-11-26 | Crystal Semiconductor Corporation | Method and apparatus for decreasing the interference and noise sensitivity of a ratiometric converter type of circuit |
| CN1400469A (en) * | 2001-08-06 | 2003-03-05 | 薄小星 | Anti-jumming measuring circuit |
-
2004
- 2004-03-05 CN CNB2004100079378A patent/CN1322315C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4547667A (en) * | 1981-04-13 | 1985-10-15 | Tokyo Kogaku Kikai Kabushiki Kaisha | Displacement measuring device utilizing an incremental code |
| US5257210A (en) * | 1989-09-28 | 1993-10-26 | Endress U. Hauser Gmbh U. Co. | Processor for processing sensor signals to obtain a desired transfer behavior |
| US5579247A (en) * | 1991-02-15 | 1996-11-26 | Crystal Semiconductor Corporation | Method and apparatus for decreasing the interference and noise sensitivity of a ratiometric converter type of circuit |
| CN1400469A (en) * | 2001-08-06 | 2003-03-05 | 薄小星 | Anti-jumming measuring circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI630405B (en) * | 2017-04-13 | 2018-07-21 | 黃秀媛 | Laser jammer |
| TWI630406B (en) * | 2017-04-13 | 2018-07-21 | 黃秀媛 | Laser jammer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1664507A (en) | 2005-09-07 |
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