CN106656114A - Method and system for measuring pulse width of continuous narrow pulses - Google Patents
Method and system for measuring pulse width of continuous narrow pulses Download PDFInfo
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- CN106656114A CN106656114A CN201610907941.2A CN201610907941A CN106656114A CN 106656114 A CN106656114 A CN 106656114A CN 201610907941 A CN201610907941 A CN 201610907941A CN 106656114 A CN106656114 A CN 106656114A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K5/01—Shaping pulses
- H03K5/04—Shaping pulses by increasing duration; by decreasing duration
- H03K5/05—Shaping pulses by increasing duration; by decreasing duration by the use of clock signals or other time reference signals
Abstract
The invention discloses a method and system for measuring the pulse width of continuous narrow pulses. The method include the steps of performing logical operation of signals of continuous narrow pulses to be measured and auxiliary wide pulse signals of a preset natural period and synthesizing the signals into third pulse signals; counting the synthesized third pulse signals by a first counter based on a clock signal, and referring to the number of clock periods corresponding to the third pulse signals to obtain a first count value; counting the auxiliary wide pulse signals of the preset natural period by a second counter based on the clock signal, and referring to the number of clock periods corresponding to the auxiliary wide pulse signals participating in the logical operation to obtain a second count value; conducting statistics of the pulse number of the to-be-measured continuous narrow pulse signals participating in the logical operation by a third counter, to obtain the number of continuous narrow pulses to be measured; and combining the first count value, the second count value, and the number of continuous narrow pulses to be measured according to the clock periods of the clock signal, to obtain the pulse width of the continuous narrow pulse signals to be measured.
Description
Technical field
The present invention relates to signal detection field, the pulse width measurement method and system of more particularly to a kind of Continuous Narrow Pulse.
Background technology
In semiconductor circuit manufacture, quite a few cost flower affects electricity in the test of this kind of circuit to detect
The manufacture of road operating characteristic or design defect, test is very important.For example, multiple semiconductor circuits, such as dynamic random
Access memory, using the internal pulse for occurring come transmission information.Different pulse widths transmits different information.Because pulse
The various functions of energy control circuit, it is normal to ensure all pulse widths that circuit is produced to it is desirable to test circuit.
But, for narrow continuous pulsewidth (i.e. pulsewidth width is less than sampling clock) never has preferable means, even if
Electric current is converted into, voltage is also required to the analog circuit of complexity, while acyclic continuous pulsewidth cannot be tested；When need measurement
Pulsewidth width when being less than sampling clock, it is impossible to directly the mode of sampling obtains Continuous Narrow Pulse signal to be measured；Affect work effect
Rate, increases testing cost.
The content of the invention
A kind of pulse width measurement method and system there is provided Continuous Narrow Pulse of the present invention, its objective is by logical mathematics
Continuous Narrow Pulse signal to be measured is converted to into sampled clock signal by computing, by the narrow pulse width conversion growth time for being difficult and gathering
The clock signal of vibration, increases the resolution ratio of clock signal, makes detection convenient.
The technical scheme that the present invention is provided is as follows：
A kind of pulse width measurement method of Continuous Narrow Pulse, the pulsewidth phase of each pulse of the Continuous Narrow Pulse to be measured
Deng and less than the pulsewidth of clock signal, including：Step S10 is auxiliary by the signal of Continuous Narrow Pulse to be measured and default natural period
Wide pulse signal is helped to carry out synthesizing the 3rd pulse signal after logical operation；Step S20 using the first counter according to it is described when
Clock signal to synthesis after the 3rd pulse signal count, with reference to the 3rd pulse signal corresponding clock cycle
Number, obtains the first count value；Step S30 is using the second counter according to the clock signal to the default natural period
Auxiliary wide pulse signal counted, with reference to participate in logical operation the auxiliary wide pulse signal corresponding clock cycle
Number, obtains the second count value；Described to be measured Continuous Narrow Pulse signal of step S40 using the 3rd counter to participation logical operation
Umber of pulse counted, obtain Continuous Narrow Pulse number to be measured；Step S50 combines institute according to the clock cycle of the clock signal
The first count value, second count value and the Continuous Narrow Pulse number to be measured are stated, the Continuous Narrow Pulse to be measured is obtained
The pulsewidth of signal.
In the present invention, Continuous Narrow Pulse signal to be measured is converted to into by sampled clock signal by logical mathematics computing,
By the narrow pulse width conversion growth time oscillating clock signal for being difficult and gathering, the resolution ratio of clock signal is increased, make detection more
Plus it is convenient.
Preferably, the interpulse period of the Continuous Narrow Pulse signal to be measured is equal or the duration such as not, and umber of pulse is
Finite number.
Preferably, including：In step S10 and/or S40：
The Continuous Narrow Pulse signal described to be measured of logical operation is participated in, comprising Nm pulse, Nm is natural number, from first arteries and veins
The rising edge of punching starts, an extremely end pulse falling edge terminates；
In step S10 and/or S30：
The auxiliary wide pulse signal of logical operation is participated in comprising N0 complete cycle, N0 is natural number, and first
Cycle earlier than or start equal to Continuous Narrow Pulse to be measured, the tail cycle is later than or terminates equal to Continuous Narrow Pulse to be measured.
Preferably, including：The Continuous Narrow Pulse signal to be measured is interpulse period equal duration, and umber of pulse is unlimited
The periodic short pulse signal of number.
Preferably, including：In step S10/S30：
The auxiliary wide pulse signal of logical operation is participated in comprising N0 complete cycle, N0 is natural number, is confessed one's crime week
Rising edge/the trailing edge of phase starts, to the end of tail cycle rising edge/trailing edge；
The Continuous Narrow Pulse signal described to be measured of logical operation is participated in, comprising Nm complete cycle, Nm is natural number, from
It is described auxiliary wide pulse signal the first cycle start, to it is described auxiliary wide pulse signal tail end cycle.
In the present invention, due to condition of work ambient influnence, for Continuous Narrow Pulse to be measured carries out synthesizing computing statistics meter
During number, the two kinds of situations that are divided into of Continuous Narrow Pulse to be measured are carried out into counting statistics, make the technical characteristic of the present invention more complete,
It is relatively reliable when calculating the pulsewidth of Continuous Narrow Pulse to be measured.
Preferably, including：Logical operation synthesis in step S10 is to use accumulation/integral way.
A kind of pulse width measure system of Continuous Narrow Pulse, including：Wherein, each pulse of the Continuous Narrow Pulse to be measured
Pulsewidth is equal and pulsewidth less than clock signal；Signal conversion module to be detected, by the signal of Continuous Narrow Pulse to be measured with it is pre-
If the auxiliary wide pulse signal of natural period carries out synthesizing the 3rd pulse signal after logical operation；First counter, it is and described
Signal conversion module to be detected electrical connection, using the first counter according to the clock signal to synthesis after the 3rd pulse
Signal is counted, and with reference to the number of the 3rd pulse signal corresponding clock cycle, obtains the first count value；Second counter,
Electrically connect with the signal conversion module to be detected, using the second counter according to the clock signal to the default intrinsic week
The auxiliary wide pulse signal of phase is counted, with reference to the auxiliary wide pulse signal corresponding clock cycle for participating in logical operation
Number, obtain the second count value；3rd counter, electrically connects with the signal conversion module to be detected, counts using the 3rd
Device is counted to the umber of pulse for participating in the Continuous Narrow Pulse signal described to be measured of logical operation, obtains Continuous Narrow Pulse to be measured
Number；Pulsewidth computing module, electrically connects respectively with first counter, second counter, the 3rd counter, according to
The clock cycle of the clock signal combines first count value, second count value and the continuous narrow arteries and veins to be measured
Number is rushed, the pulsewidth of the Continuous Narrow Pulse signal to be measured is obtained.
In the present invention, Continuous Narrow Pulse signal to be measured is converted to into by sampled clock signal by logical mathematics computing,
Reference clock can use high-precision crystal oscillator, and oscillator eliminates its ambient influnence and deviation by measuring twice, and raising is treated
Continuous Narrow Pulse signal number is surveyed, most I can be greatly promoted and surveyed precision.
Preferably, the Continuous Narrow Pulse signal to be measured includes：During the pulse spacing of the Continuous Narrow Pulse signal to be measured
Between be equal or the duration such as not, umber of pulse is finite number；The Continuous Narrow Pulse signal to be measured is that interpulse period is equal
Duration, umber of pulse is the periodic short pulse signal of limitless number.
Preferably, obtaining the pulsewidth model of the Continuous Narrow Pulse signal to be measured includes：
Pw=(NrefA-NrefB) Tref/Nm
NrefA-- is the first count value；NrefB-- is the second count value；The pulse of Nm-- Continuous Narrow Pulse signals to be measured
Number；Tref-- is the cycle of clock signal.
The present invention is, by the pulsewidth of Continuous Narrow Pulse to be measured, also including the pulsewidth of a period of time, to change into and known periods
The mechanical periodicity of oscillator, and accumulated, eventually through detection clock, detection cycle oscillator change, obtain the time to be measured
Total pulsewidth width.
Compared with prior art, the present invention provides a kind of pulse width measurement method and system of Continuous Narrow Pulse, at least brings
A kind of following technique effect:
1st, the present invention is solved in prior art when detecting that common pulsewidth is counted, and the cycle for detecting clock is less than arteries and veins
The problem of wide degree.
2nd, when the present invention solves detection pulsewidth of the prior art, need pulse width conversion into voltage or current signal
Deng the problem for further measuring, if pulsewidth is changed into clock signal by the present invention, therefore, easy to detect, flexibility is high, should
It is wider for scope.
3rd, if pulsewidth to be measured is periodic in the present invention, given pulse width period number can be passed through, obtains single arteries and veins
Wide time width, precision is very high.
Description of the drawings
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, to a kind of arteries and veins of Continuous Narrow Pulse
Wide measuring method and system performance, technical characteristic, advantage and its implementation are further described.
Fig. 1 is a kind of flow chart of one embodiment of the pulse width measurement method of Continuous Narrow Pulse of the invention；
Fig. 2 is a kind of structural representation of pulse width measure system one embodiment of Continuous Narrow Pulse of the invention；
Fig. 3 is the circuit diagram of Continuous Narrow Pulse conversion to be measured of the invention；
Fig. 4 is the structure chart of Continuous Narrow Pulse conversion to be measured of the invention；
Fig. 5 is the oscillogram of Continuous Narrow Pulse conversion to be measured of the invention.
Specific embodiment
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below by control description of the drawings
The specific embodiment of the present invention.It should be evident that drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing, and obtain other embodiments.
To make simplified form, part related to the present invention is only schematically show in each figure, they are not represented
Its practical structures as product.In addition, so that simplified form is readily appreciated, with identical structure or function in some figures
Part, only symbolically depicts one of those, or has only marked one of those.Herein, " one " is not only represented
" only this ", it is also possible to represent the situation of " more than one ".
The present invention provides a kind of one embodiment of the pulse width measurement method of Continuous Narrow Pulse, the Continuous Narrow Pulse to be measured
(A) pulsewidth of each pulse is equal and less than the pulsewidth of clock signal (ref), including：Step S10 will be to be measured continuous narrow
The signal of pulse carries out synthesizing the 3rd pulse signal after logical operation with the auxiliary wide pulse signal (B) of default natural period
(C)；Step S20 using the first counter according to the clock signal (D) to synthesis after the 3rd pulse signal count
Number, with reference to the number of the 3rd pulse signal corresponding clock cycle, obtains the first count value；Step S30 is using the second meter
Number device is counted according to the clock signal (D) to the auxiliary wide pulse signal (B) of the default natural period, with reference to participation
The number of the auxiliary wide pulse signal (B) the corresponding clock cycle of logical operation, obtains the second count value；Step S40 profit
The umber of pulse for participating in the Continuous Narrow Pulse signal described to be measured of logical operation is counted with the 3rd counter, obtains company to be measured
Continuous burst pulse number；Step S50 combines first count value, second counting according to the clock cycle of the clock signal
Value and the Continuous Narrow Pulse number to be measured, obtain the pulsewidth of the Continuous Narrow Pulse signal to be measured.
Specifically, in the present embodiment, with reference to shown in Fig. 1 and Fig. 5, clock signal refers to reference clock (D) signal；It is default
The auxiliary wide pulse signal of natural period refers to signal of the natural mode shape with the oscillator for keeping function for (B)；Shake
Swinging the frequency of device can arrange regulation；Continuous Narrow Pulse signal (A) to be measured is input to after the oscillator for keeping function, is passed through
Synthesize the 3rd pulse signal (C) namely (C) signal in Fig. 5 after logical operation process inside oscillator；Oscillator output
Natural mode shape is (B) signal；Counted as standard with reference clock signal (D)；The 3rd pulse signal (C) is counted first
The first several count values is NrefA, and the second count value that the auxiliary wide pulse signal to presetting the natural period is counted is NrefB,
What the umber of pulse of Continuous Narrow Pulse signal to be measured was counted is counted as Nm；Tref is the cycle of reference clock signal (D)；Therefore
The pulsewidth that technical characteristic by more than can ask for Continuous Narrow Pulse signal to be measured with founding mathematical models；As Pw=
(NrefA-NrefB)·Tref/Nm。
In the present invention, Continuous Narrow Pulse signal to be measured is converted to into by sampled clock signal by logical mathematics computing,
By the narrow pulse width conversion growth time oscillating clock signal for being difficult and gathering, the resolution ratio of clock signal is increased, make detection more
Plus it is convenient.
Preferably, the interpulse period of the Continuous Narrow Pulse signal to be measured is equal or the duration such as not, and umber of pulse is
Finite number.
Preferably, including：In step S10/S40：Participate in the Continuous Narrow Pulse signal described to be measured of logical operation, bag
Containing Nm (Nm is natural number) pulses, terminate from the rising edge of first pulse, to an end pulse falling edge；
In step S10/S30：
The auxiliary wide pulse signal for participating in logical operation includes N0 (N0 is natural number) complete cycle, and first
Cycle earlier than or start equal to Continuous Narrow Pulse to be measured, the tail cycle is later than or terminates equal to Continuous Narrow Pulse to be measured.
Specifically, with reference to shown in Fig. 1 and 4；The present embodiment is the another embodiment provided on the basis of a upper embodiment；
It is not advise because the interference of electromagnetism and external environment condition causes the waveform signal of Continuous Narrow Pulse to be measured (A) in real work
Then；First in the present embodiment, for example, the pulse width that Continuous Narrow Pulse (A) signal to be measured is produced is equal, but not
It is periodic, while the number of the pulse in Continuous Narrow Pulse to be measured (A) is limited, as Nm；With reference clock letter
Cycle clock signal is detected on the basis of number (D)；Until Continuous Narrow Pulse signal to be measured is all detected completing, simultaneously participate in and patrol
The auxiliary wide pulse signal for collecting computing is complete periodic signal in the Continuous Narrow Pulse signal to be measured that detection is completed, according to limited
Pulse number Nm by two counters respectively to synthesis after the 3rd pulse count signal and the auxiliary wide pulse signal
The counting that complete cycle signal is carried out.Founding mathematical models ask for the pulsewidth of Continuous Narrow Pulse signal to be measured；As Pw=
(NrefA-NrefB)·Tref/Nm。
Preferably, including：The Continuous Narrow Pulse signal to be measured is interpulse period equal duration, and umber of pulse is unlimited
The periodic short pulse signal of number.
Preferably, including：In step S10/S30：
The auxiliary wide pulse signal of logical operation is participated in comprising N0 (N0 is natural number) complete cycle, is confessed one's crime week
Rising edge/the trailing edge of phase starts, to the end of tail cycle rising edge/trailing edge；
In step S10/S40：The Continuous Narrow Pulse signal described to be measured of logical operation is participated in, (Nm is comprising Nm
Natural number) complete cycle, from the first cycle of the auxiliary wide pulse signal, to the tail week of the auxiliary wide pulse signal
Phase terminates.
Specifically, with reference to shown in Fig. 5；The present embodiment is the another embodiment provided on the basis of a upper embodiment；This
Waveform signal in embodiment also including Continuous Narrow Pulse to be measured (A) is regular, but in wireless circulating state：For arteries and veins
Wide measurement count is：The periodic signal produced with participating in the auxiliary wide pulse signal of logical operation, i.e. intrinsic frequency is foundation,
If intrinsic frequency is produced after 20 complete cycle signals；Treated using counting statistics of the 3rd counter with clock signal as standard
The pulsewidth number of the waveform signal of Continuous Narrow Pulse (A) is surveyed, using the second counter with clock signal as the intrinsic frequency of canonical statistics
What rate produced 20 complete cycle signals is counted as NrefB；The periodic signal for producing in intrinsic frequency simultaneously produces the bar of 20
Under part, the 3rd signal period after counting statistics synthesis using the first counter with clock signal as standard produces the of 20
With count value as NrefA；Founding mathematical models ask for the pulsewidth of Continuous Narrow Pulse signal to be measured；As Pw=(NrefA-
NrefB)·Tref/Nm。
In the present invention, due to condition of work ambient influnence, for Continuous Narrow Pulse to be measured carries out synthesizing computing statistics meter
During number, the two kinds of situations that are divided into of Continuous Narrow Pulse to be measured are carried out into counting statistics, make the technical characteristic of the present invention more complete,
It is relatively reliable when calculating the pulsewidth of Continuous Narrow Pulse to be measured.
Preferably, including：Logical operation synthesis in step S10 is using accumulation (integration) mode.
The present invention also provides a kind of one embodiment of the pulse width measure system of Continuous Narrow Pulse, including：Wherein, it is described to treat
The pulsewidth for surveying each pulse of Continuous Narrow Pulse (A) is equal and less than the pulsewidth of clock signal (D)；Signal conversion to be detected
Module 1, the signal of Continuous Narrow Pulse to be measured and the auxiliary wide pulse signal (B) of default natural period are carried out to close after logical operation
Become the 3rd pulse signal (C)；First counter 2, electrically connects, using the first counter with the signal conversion module to be detected
According to the clock signal (D) to synthesis after the 3rd pulse signal count, it is corresponding with reference to the 3rd pulse signal
The number of clock cycle, obtains the first count value；Second counter 3, electrically connects with the signal conversion module to be detected, utilizes
Second counter is counted according to the clock signal (D) to the auxiliary wide pulse signal of the default natural period, reference
The number of the auxiliary wide pulse signal corresponding clock cycle of logical operation is participated in, the second count value is obtained；3rd counts
Device 4, electrically connects with the signal conversion module to be detected, using the 3rd counter to participating in the described to be measured continuous of logical operation
The umber of pulse of narrow pulse signal is counted, and obtains Continuous Narrow Pulse number Nm to be measured；Pulsewidth computing module 5, respectively with described
One counter, second counter, the 3rd counter electrical connection, according to the clock cycle of the clock signal (D)
Tref combines first count value, second count value and the Continuous Narrow Pulse number to be measured, obtains described to be measured
The pulsewidth of Continuous Narrow Pulse signal.
Specifically, in the present embodiment, referring to figs. 2 and 5 shown, clock signal refers to reference clock (D) signal；It is default
The auxiliary wide pulse signal of natural period refers to the signal (B) of the natural mode shape with the oscillator for keeping function；To treat
Survey Continuous Narrow Pulse signal A to be input to after the oscillator with holding function, after the logical operation process inside oscillator
Synthesize the 3rd pulse signal (C) namely the B signal in Fig. 2；The natural mode shape of oscillator output is B signal；During referring to
Clock signal (D) is counted for standard；It is NrefA first to the first count value that the 3rd pulse signal (C) is counted, to default solid
The second count value that rhythmic auxiliary wide pulse signal is counted is NrefB, and the umber of pulse of Continuous Narrow Pulse signal to be measured is carried out
What is counted is counted as Nm；Therefore Continuous Narrow Pulse signal to be measured can be asked for founding mathematical models by the technical characteristic of the above
Pulsewidth；As Pw=(NrefA-NrefB) Tref/Nm；Tref is the cycle of reference clock Ref Clock signals.
In the present invention, Continuous Narrow Pulse signal to be measured is converted to into by sampled clock signal by logical mathematics computing,
Reference clock can use high-precision crystal oscillator, and oscillator eliminates its ambient influnence and deviation by measuring twice, and raising is treated
Continuous Narrow Pulse signal number is surveyed, most I can be greatly promoted and surveyed precision.
Preferably, the Continuous Narrow Pulse signal to be measured includes：During the pulse spacing of the Continuous Narrow Pulse signal to be measured
Between be equal or the duration such as not, umber of pulse is finite number；The Continuous Narrow Pulse signal to be measured is that interpulse period is equal
Duration, umber of pulse is the periodic short pulse signal of limitless number.
Specifically, when the interpulse period of the Continuous Narrow Pulse signal to be measured is equal or the duration such as not, umber of pulse
For finite number when；The Continuous Narrow Pulse signal described to be measured of logical operation is participated in, comprising Nm (Nm is natural number) pulse, oneself
The rising edge of first pulse starts, an extremely end pulse falling edge terminates；Participate in the auxiliary wide pulse signal bag of logical operation
(N0 is natural number) complete cycle containing N0, and the first cycle earlier than or start equal to Continuous Narrow Pulse to be measured, evening in tail cycle
In or terminate equal to Continuous Narrow Pulse to be measured.
When the Continuous Narrow Pulse signal to be measured is interpulse period equal duration, umber of pulse is the cycle of limitless number
Property narrow pulse signal when, participate in the auxiliary wide pulse signal of logical operation comprising N0 (N0 is natural number) complete weeks
Phase, the rising edge/trailing edge in cycle of confessing one's crime starts, to the end of tail cycle rising edge/trailing edge；Participate in the described of logical operation
Continuous Narrow Pulse signal to be measured, comprising Nm (Nm is natural number) complete cycle, from the head weeks of the auxiliary wide pulse signal
Phase starts, to the tail end cycle of the auxiliary wide pulse signal.
The present invention also provides one embodiment, with reference to shown in Fig. 2,3,4；Continuous Narrow Pulse signal input to be measured is protected to band
The later signal intensity of the oscillator of function is held, namely the composite signal of signal conversion module 1 to be detected is generated and included：Band in Fig. 3
Function oscillator is kept to be 100 parts in Fig. 4, by hysteresis comparator (CMP), current source (IC1＆IC2), metal-oxide-semiconductor (PMOS＆
NMOS), (S1＆S2) is switched, electric capacity C0 compositions；When pulsewidth effectively (high level), band keeps function oscillator to keep current work
Make state, including oscillation phase, and its clock output then locks current level, when pulsewidth invalid (low level), oscillator after
Continuous free oscillation, it is clear that the clock output of oscillator contains continuous pulsewidth sum, is sampled by reference to the counting of clock afterwards,
Can be obtained by continuous pulsewidth width.
It is the work of normal oscillation device when switch S1 and S2 is closed, OSC_OUT level adds sluggish more electric higher than VREF
After pressure, comparator output high level, NMOS is opened, and OSC_OUT voltages decline, when OSC_OUT subtracts sluggish more electric less than VREF
After pressure, comparator output low level, PMOS is opened, and OSC_OUT voltages rise.
When switch S1 and S2 is opened, in the effect of electric capacity C0 and switch, oscillator keeps opening moment shape with switching
State, when S1 and S2 are closed at, oscillator will work on；
Only need to be high level in Continuous Narrow Pulse signal to be measured if Continuous Narrow Pulse signal high level width to be measured
When, open switch S1 and S2, during low level, closure switch S1 and S2；
The clock with function is kept is output as 200 part in Fig. 4 in Fig. 3, is made up of two reversers and switch S3 and S4.
If Continuous Narrow Pulse signal high level width to be measured, open when Continuous Narrow Pulse signal to be measured is high level
S3, closes S4 so that clock output maintains the original state, and during low level, closes S3, opens S4 so as to normal output.
The present invention is, by the pulsewidth of Continuous Narrow Pulse to be measured, also including the pulsewidth of a period of time, to change into and known periods
The mechanical periodicity of oscillator, and accumulated, eventually through detection clock, detection cycle oscillator change, obtain the time to be measured
Total pulsewidth width；Circuit is simple, includes self calibration mode, and it is convenient to realize；For periodicity narrow spaces, by this way can be with
Greatly improve measuring accuracy.
It should be noted that above-described embodiment can independent assortment as needed.The above is only the preferred of the present invention
Embodiment, it is noted that for those skilled in the art, in the premise without departing from the principle of the invention
Under, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of pulse width measurement method of Continuous Narrow Pulse, the pulsewidth of each pulse of the Continuous Narrow Pulse to be measured is equal,
And less than the pulsewidth of clock signal, it is characterised in that include：
Step S10 carries out the signal of Continuous Narrow Pulse to be measured after logical operation with the auxiliary wide pulse signal of default natural period
Synthesize the 3rd pulse signal；
Step S20 using the first counter according to the clock signal to synthesis after the 3rd pulse signal count,
With reference to the number of the 3rd pulse signal corresponding clock cycle, the first count value is obtained；
Step S30 is entered according to the clock signal using the second counter to the auxiliary wide pulse signal of the default natural period
Row is counted, and with reference to the number of the auxiliary wide pulse signal corresponding clock cycle for participating in logical operation, obtains the second counting
Value；
Step S40 is united using the 3rd counter to the umber of pulse for participating in the Continuous Narrow Pulse signal described to be measured of logical operation
Meter, obtains Continuous Narrow Pulse number to be measured；
Step S50 combines first count value, second count value, Yi Jisuo according to the clock cycle of the clock signal
Continuous Narrow Pulse number to be measured is stated, the pulsewidth of the Continuous Narrow Pulse signal to be measured is obtained.
2. the pulse width measurement method of Continuous Narrow Pulse according to claim 1, it is characterised in that include：
The interpulse period of the Continuous Narrow Pulse signal to be measured is equal or the duration such as not, and umber of pulse is finite number.
3. the pulse width measurement method of Continuous Narrow Pulse according to claim 2, it is characterised in that include：
In step S10 and/or S40：
The Continuous Narrow Pulse signal described to be measured of logical operation is participated in, comprising Nm pulse, Nm is natural number, from first pulse
Rising edge starts, an extremely end pulse falling edge terminates；
In step S10 and/or S30：
The auxiliary wide pulse signal of logical operation is participated in comprising N0 complete cycle, N0 is natural number, and the first cycle
Earlier than or start equal to Continuous Narrow Pulse to be measured, the tail cycle is later than or terminates equal to Continuous Narrow Pulse to be measured.
4. the pulse width measurement method of Continuous Narrow Pulse according to claim 1, it is characterised in that include：
The Continuous Narrow Pulse signal to be measured is interpulse period equal duration, and umber of pulse is the narrow arteries and veins of periodicity of limitless number
Rush signal.
5. the pulse width measurement method of Continuous Narrow Pulse according to claim 4, it is characterised in that include：
In step S10 and/or S30：
The auxiliary wide pulse signal of logical operation is participated in comprising N0 complete cycle, N0 is natural number, is confessed one's crime the cycle
Rising edge/trailing edge starts, to the end of tail cycle rising edge/trailing edge；
In step S10 and/or S40：
The Continuous Narrow Pulse signal described to be measured of logical operation is participated in, comprising the cycle that Nm is complete, Nm is natural number, from described
Auxiliary wide pulse signal the first cycle start, to it is described auxiliary wide pulse signal tail end cycle.
6. the pulse width measurement method of Continuous Narrow Pulse according to claim 1, it is characterised in that include：
Logical operation synthesis in step S10 is to use accumulation/integral way.
7. according to the pulse width measurement method of the arbitrary described Continuous Narrow Pulse of claim 1-6, it is characterised in that treat described in obtaining
The pulsewidth model of the Continuous Narrow Pulse signal of survey includes：
Pw=(NrefA-NrefB) Tref/Nm
NrefA-- is the first count value；NrefB-- is the second count value；The umber of pulse of Nm-- Continuous Narrow Pulse signals to be measured；
Tref-- is the cycle of clock signal.
8. a kind of pulse width measure system of Continuous Narrow Pulse, can perform the phase place of the arbitrary described homogenous frequency signal of claim 1-7
Poor detection method, it is characterised in that include：
Wherein, the pulsewidth of each pulse of the Continuous Narrow Pulse to be measured is equal and pulsewidth less than clock signal；
Signal conversion module to be detected, the signal of Continuous Narrow Pulse to be measured is entered with the auxiliary wide pulse signal of default natural period
The 3rd pulse signal is synthesized after row logical operation；
First counter, electrically connects, using the first counter according to the clock signal with the signal conversion module to be detected
The 3rd pulse signal after to synthesis is counted, and with reference to the number of the 3rd pulse signal corresponding clock cycle, is obtained
First count value；
Second counter, electrically connects, using the second counter according to the clock signal with the signal conversion module to be detected
The auxiliary wide pulse signal of the default natural period is counted, with reference to the auxiliary broad pulse letter for participating in logical operation
The number of number corresponding clock cycle, obtains the second count value；
3rd counter, electrically connects with the signal conversion module to be detected, using the 3rd counter to participating in logical operation
The umber of pulse of the Continuous Narrow Pulse signal to be measured is counted, and obtains Continuous Narrow Pulse number to be measured；
Pulsewidth computing module, electrically connects respectively, root with first counter, second counter, the 3rd counter
First count value, second count value and described to be measured continuous narrow are combined according to the clock cycle of the clock signal
Umber of pulse, obtains the pulsewidth of the Continuous Narrow Pulse signal to be measured.
9. the pulse width measure system of the Continuous Narrow Pulse according to claim 8, it is characterised in that the continuous narrow arteries and veins to be measured
Rushing signal includes：
The interpulse period of the Continuous Narrow Pulse signal to be measured is equal or the duration such as not, and umber of pulse is finite number；
And/or,
The Continuous Narrow Pulse signal to be measured is interpulse period equal duration, and umber of pulse is the narrow arteries and veins of periodicity of limitless number
Rush signal.
10. according to the pulse width measure system of the arbitrary described Continuous Narrow Pulse of claim 8-9, it is characterised in that obtain described
The pulsewidth model of Continuous Narrow Pulse signal to be measured includes：
Pw=(NrefA-NrefB) Tref/Nm
NrefA-- is the first count value；NrefB-- is the second count value；The umber of pulse of Nm-- Continuous Narrow Pulse signals to be measured；
Tref-- is the cycle of clock signal.
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