CN1492577A - Second pulse circuit - Google Patents
Second pulse circuit Download PDFInfo
- Publication number
- CN1492577A CN1492577A CNA021480753A CN02148075A CN1492577A CN 1492577 A CN1492577 A CN 1492577A CN A021480753 A CNA021480753 A CN A021480753A CN 02148075 A CN02148075 A CN 02148075A CN 1492577 A CN1492577 A CN 1492577A
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- CN
- China
- Prior art keywords
- circuit
- oscillator
- pulse
- frequency dividing
- output
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- 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.)
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- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
A second pulse circuit includes a RC vibrator, a frequency dividing circuit of 2 to the power 15, level connecting with the RC vibrator, and output width regulation circuit connecting with the 2 to the power 15 level frequency dividing circuit characterizing that R1,R2 ends on the RC vibrator are connected with a foreign resistor R, a foreign capacitor C is connected on R, C, ends of RC vibrator, the input end of the said 2 to the power 15 is connected with the input of the vibrator. The Tw end on the output width regulation circuit is connected with foreign Cw, the other end of which links to the earth and input end of the regulation circuit is linked with output of the 2 to the power 15 level dividing circuit.
Description
Technical field
The present invention relates to a kind of impulse circuit, be meant a kind of Second pulse circuit especially, it is single chip integrated frequency and broad-adjustable pps pulse per second signal generator.
Background technology
In many space instruments, usually need pps pulse per second signal, can adopt discrete components and parts such as crystal oscillator and frequency dividing circuit, pulse shaper etc. to form usually.But this method not only volume and power consumption is bigger, and circuit debugging is also pretty troublesome, also will consider the RELIABILITY OF QUARTZ OSCILLATOR problem simultaneously.More than these shortcomings and detection instrument power consumption little, requiring of light weight is inconsistent, has limited the development of detection instrument, therefore under the precondition that guarantees original instrument performance, for the development of detection instrument, has invented this Second pulse circuit.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of Second pulse circuit, it has volume advantage little and low in energy consumption.
A kind of Second pulse circuit of the present invention includes: one has the RC oscillator; One be connected with the RC oscillator 2
15The level frequency dividing circuit; One output width adjustment circuit and 2
15The level frequency dividing circuit connects, and it is characterized in that the R on the RC oscillator
1, R
2Hold an external resistance R, an external capacitor C is connected on the R on the RC oscillator
1, C
1End; These are 2 years old
15The input of level frequency dividing circuit is connected with the input of RC oscillating circuit; T on output width adjustment circuit
wHold an external capacitor C
w, this capacitor C
wOther end ground connection, the input and 2 of this output width adjustment circuit
15The output of level frequency dividing circuit is connected.
Description of drawings
In order to further specify technology contents of the present invention, below in conjunction with embodiment and accompanying drawing the present invention is done a detailed description, wherein:
Fig. 1 is the block diagram of invention;
Fig. 2 is the physical circuit figure of Fig. 1.
Embodiment
See also Fig. 1 and Fig. 2, a kind of Second pulse circuit of the present invention includes a RC oscillator a; One be connected with RC oscillator a 2
15Level frequency dividing circuit b; One output width adjustment circuit c and 2
15Level frequency dividing circuit a connects, and it is characterized in that the R on the RC oscillator
1, R
2Hold an external resistance R, an external capacitor C is connected on the R on the RC oscillator
1, C
1End; These are 2 years old
15The input of level frequency dividing circuit b is connected with the input of RC oscillating circuit a; T on output width adjustment circuit c
wHold an external capacitor C
w, this capacitor C
wOther end ground connection, the input and 2 of this output width adjustment circuit c
15The output of level frequency dividing circuit b (the wherein said RC oscillator, 2 that is connected
15Level frequency dividing circuit, output width adjustment circuit are prior art).
The present invention mainly is that resistance R, capacitor C AND circuit are formed RC oscillator and RC oscillator and frequency dividing circuit, and it is integrated that output pulse width is adjusted the circuit monolithic.
The RC oscillator, 2 that Second pulse circuit is made of outer meeting resistance R, external capacitor C and not gate
15Level frequency dividing circuit and output pulse width are adjusted circuit and are formed.The inventive point of Second pulse circuit is that RC oscillator and RC oscillator and frequency dividing circuit monolithic are integrated.Among the present invention, outer meeting resistance R and external capacitor C can in very large range adjust, thereby can obtain pps pulse per second signal, also can obtain the pulse signal of other frequencies.The pps pulse per second signal width-adjustable.Second pulse circuit operation principle block diagram such as Fig. 1, circuit diagram such as Fig. 2.
Among Fig. 2, the RC oscillator is made up of with outer meeting resistance R and external capacitor C the CMOS not gate, changes resistance R resistance or capacitor C appearance value, then can change the oscillator operating frequency, thereby realizes the frequency selection.Frequency dividing circuit of the present invention is fixed as 2
15Level, i.e. 32768 frequency divisions.If the RC oscillator is operated in 32768HZ, through 2
15The level frequency division then obtains the output of 1HZ pps pulse per second signal, changes outer meeting resistance R value or external capacitor C value, then changes RC oscillator operating frequency, thus the pulse signal of output corresponding frequencies.The 1HZ pps pulse per second signal connects d type flip flop, again d type flip flop zero clearing mode is realized that output pulse width is adjustable after utilizing the d type flip flop output delay.Q is the output of Second pulse circuit, T
wThe external capacitor end, external capacitor C
wAdjustable, realize the output pulse width adjustment.V
DDBe the working power of pulse per second (PPS), its value is 3.0～9.0V, and representative value is 5.0V, V
SSBe the ground end of Second pulse circuit, R is the reset terminal of Second pulse circuit, when the Second pulse circuit monolithic is integrated, passes through grounding through resistance in inside.
Second pulse circuit monolithic is integrated, and this circuit is extremely easy to use, and it is simplified greatly by the clock signal that discrete components and parts such as crystal oscillator, frequency dividing circuit constitute.During+5.0V power supply, operating current＜1mA, power consumption is minimum, and reliability also increases.
The Second pulse circuit course of work
Through the RC oscillator of outer meeting resistance R, external capacitor C (outer meeting resistance R and external capacitor C can in very large range adjust, thereby can obtain pps pulse per second signal, also can obtain the pulse signal of other frequencies) and not gate formation, again by 2
15Level frequency dividing circuit and output pulse width are adjusted the adjustment of circuit, export needed pps pulse per second signal at last.
Claims (1)
1, a kind of Second pulse circuit includes: one has the RC oscillating circuit; One be connected with the RC oscillator 2
15The level frequency dividing circuit; One output width adjustment circuit and 2
15The level frequency dividing circuit connects, and it is characterized in that the R on the RC oscillator
1, R
2Hold an external resistance R, an external capacitor C is connected on the R on the RC oscillator
1, C
1End; These are 2 years old
15The input of level frequency dividing circuit is connected with the input of RC oscillating circuit; T on output width adjustment circuit
wHold an external capacitor C
w, this capacitor C
wOther end ground connection, the input and 2 of this output width adjustment circuit
15The output of level frequency dividing circuit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021480753A CN1492577A (en) | 2002-10-25 | 2002-10-25 | Second pulse circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021480753A CN1492577A (en) | 2002-10-25 | 2002-10-25 | Second pulse circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1492577A true CN1492577A (en) | 2004-04-28 |
Family
ID=34233084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021480753A Pending CN1492577A (en) | 2002-10-25 | 2002-10-25 | Second pulse circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1492577A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854158A (en) * | 2010-05-28 | 2010-10-06 | 上海集成电路研发中心有限公司 | D-type flip-flop unit and frequency divider with the same |
-
2002
- 2002-10-25 CN CNA021480753A patent/CN1492577A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101854158A (en) * | 2010-05-28 | 2010-10-06 | 上海集成电路研发中心有限公司 | D-type flip-flop unit and frequency divider with the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |