CN203708203U - Circuit capable of carrying out program-controlled synchronous square-wave output - Google Patents
Circuit capable of carrying out program-controlled synchronous square-wave output Download PDFInfo
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- CN203708203U CN203708203U CN201320883617.3U CN201320883617U CN203708203U CN 203708203 U CN203708203 U CN 203708203U CN 201320883617 U CN201320883617 U CN 201320883617U CN 203708203 U CN203708203 U CN 203708203U
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- circuit
- integrated circuit
- square
- output
- trigger
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model relates to a circuit capable of carrying out program-controlled synchronous square-wave output. The circuit comprises a Not-gate integrated circuit, a trigger and an RC circuit. An output terminal of the Not-gate integrated circuit is connected with the trigger, and the RC circuit is connected to the Not-gate integrated circuit. After being electrified, the Not-gate integrated circuit outputs a square-wave signal; the duty ratio and the frequency of the square-wave signal are adjusted by the RC circuit; and the square-wave signal is output from the output terminal of the Not-gate integrated circuit to the trigger. Compared with the prior art, the circuit provided by the utility model has the advantages of simplicity, easy implementation and high frequency.
Description
Technical field
The utility model relates to the synchronous output circuit of a kind of square wave, especially relates to a kind of program-controlled circuit that completes the synchronous output of square wave.
Background technology
At present, need to use the synchronous anti-phase square-wave signal of two-way in carrying out circuit studies, this two-way square-wave signal must and stop by its generation of program control.In the time of the square-wave pulse of a given fixed width, require to produce this two paths of signals within the duration of the square-wave pulse of this fixed width, two paths of signals produces at the rising edge of given square-wave pulse, finishes at trailing edge.
Realize above-mentioned functions, can have a variety of methods, technology is all very ripe, but exists structure too complicated, realizes the defect that cost is too high.
Summary of the invention
The purpose of this utility model is exactly to provide a kind of simple program-controlled circuit that completes the synchronous output of square wave in order to overcome the defect that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions:
A program-controlled circuit that completes the synchronous output of square wave, comprises ungated integrated circuit, trigger and RC circuit, and the output of described ungated integrated circuit connects trigger, and described RC circuit is connected on ungated integrated circuit; A square-wave signal of output after described ungated integrated circuit energising, after duty ratio and frequency by this square-wave signal of RC circuit adjustment, exports to trigger by the output of ungated integrated circuit.
Described ungated integrated circuit comprises the multiple not gates that connect by pin successively.
Described not gate is provided with five.
Described RC circuit is connected to wherein between two pin of ungated integrated circuit.
Described RC circuit comprises the resistance R and the capacitor C that are connected.
Described trigger is provided with the control end of controlling voltage for connecting.
Compared with prior art, the utility model is simple, particularly in frequency, can accomplish megahertz, and general scheme can not meet this requirement.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.The present embodiment is implemented as prerequisite taking technical solutions of the utility model, provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
A program-controlled circuit that completes the synchronous output of square wave, comprises ungated integrated circuit 1, trigger 2 and RC circuit 3 as shown in Figure 1, and the output of described ungated integrated circuit 1 connects trigger 2, and described RC circuit 3 is connected on ungated integrated circuit 1.Described ungated integrated circuit 1 comprises the multiple not gates 102 that connect by pin 101 successively, and in the present embodiment, not gate 102 is provided with five, adopts 74LS04 chip.
Described RC circuit 3 is connected to wherein between two pin of ungated integrated circuit 1, and RC circuit 3 comprises the resistance R and the capacitor C that are connected, the resistance of the optional 1k of resistance R.
Described trigger 3 adopts 74LS74 chip, which is provided with the control end of controlling voltage for connecting.
The above-mentioned program-controlled circuit working principle that completes the synchronous output of square wave is: a square-wave signal AA of output after ungated integrated circuit 1 energising, regulate after the duty ratio and frequency of this square-wave signal by RC circuit 3, export to trigger 2 by the output of ungated integrated circuit 1, the input of trigger 2 receives square-wave signal, control end receives controls voltage signal, in the time that control end is high level, anti-phase square-wave signal AA1 and the AA2 of trigger output two-way, in the time that control end is low level, trigger finishes output.
Claims (6)
1. a program-controlled circuit that completes the synchronous output of square wave, is characterized in that, comprises ungated integrated circuit, trigger and RC circuit, and the output of described ungated integrated circuit connects trigger, and described RC circuit is connected on ungated integrated circuit; A square-wave signal of output after described ungated integrated circuit energising, after duty ratio and frequency by this square-wave signal of RC circuit adjustment, exports to trigger by the output of ungated integrated circuit.
2. a kind of program-controlled circuit that completes the synchronous output of square wave according to claim 1, is characterized in that, described ungated integrated circuit comprises the multiple not gates that connect by pin successively.
3. a kind of program-controlled circuit that completes the synchronous output of square wave according to claim 2, is characterized in that, described not gate is provided with five.
4. a kind of program-controlled circuit that completes the synchronous output of square wave according to claim 2, is characterized in that, described RC circuit is connected to wherein between two pin of ungated integrated circuit.
5. according to a kind of program-controlled circuit that completes the synchronous output of square wave described in claim 1 or 4, it is characterized in that, described RC circuit comprises the resistance R and the capacitor C that are connected.
6. a kind of program-controlled circuit that completes the synchronous output of square wave according to claim 1, is characterized in that, described trigger is provided with the control end of controlling voltage for connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320883617.3U CN203708203U (en) | 2013-12-30 | 2013-12-30 | Circuit capable of carrying out program-controlled synchronous square-wave output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320883617.3U CN203708203U (en) | 2013-12-30 | 2013-12-30 | Circuit capable of carrying out program-controlled synchronous square-wave output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203708203U true CN203708203U (en) | 2014-07-09 |
Family
ID=51058580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320883617.3U Expired - Lifetime CN203708203U (en) | 2013-12-30 | 2013-12-30 | Circuit capable of carrying out program-controlled synchronous square-wave output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203708203U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753501A (en) * | 2013-12-30 | 2015-07-01 | 上海普锐马电子有限公司 | Circuit for completing synchronous square-wave output in programmable mode |
-
2013
- 2013-12-30 CN CN201320883617.3U patent/CN203708203U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104753501A (en) * | 2013-12-30 | 2015-07-01 | 上海普锐马电子有限公司 | Circuit for completing synchronous square-wave output in programmable mode |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |