CN208077476U - A kind of square wave oscillation illustrative circuitry - Google Patents
A kind of square wave oscillation illustrative circuitry Download PDFInfo
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- CN208077476U CN208077476U CN201820374105.7U CN201820374105U CN208077476U CN 208077476 U CN208077476 U CN 208077476U CN 201820374105 U CN201820374105 U CN 201820374105U CN 208077476 U CN208077476 U CN 208077476U
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- resistance
- integrated transporting
- light emitting
- transporting discharging
- square
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Abstract
The utility model provides a kind of square wave oscillation illustrative circuitry, circuit includes the square-wave oscillator and three voltage controlled current sources of an amplifier composition, three voltage controlled current sources change the output voltage of square-wave oscillator, positive and negative feedthrough voltage and negative feedback voltage into electric current respectively, light emitting diode is respectively driven by electric current again, the variation of the output voltage, positive and negative feedthrough voltage and negative feedback voltage of square-wave oscillator is indicated by the brightness change image of three light emitting diodes.The utility model is applied to the teaching of integrated transporting discharging content, the operation principle for the square-wave oscillator being made of integrated transporting discharging can be visually demonstrated, improves teaching effect.
Description
Technical field
The utility model is related to a kind of operation principle illustrative circuitries of the square-wave oscillator of integrated transporting discharging composition, are applied to mould
The teaching of the integrated transporting discharging content of quasi- Electron Technique Course, belongs to electronic technology field.
Background technology
The square-wave oscillator being made of integrated transporting discharging is the typical circuit of integrated transporting discharging nonlinear application, is widely used in
The various focal points for automatically controlling occasion and analog electronic technology course.But the square-wave oscillator of integrated transporting discharging composition, relates to
And the non-delay positive feedback being made of electric resistance partial pressure, the lag negative-feedback being made of capacitance-resistance charge and discharge, for beginner, sense
Feel is rather difficult to understand its operation principle.And it is current, not seeing also has suitable equipment or teaching aid, can visually demonstrate integrated transporting discharging group
At square-wave oscillator operation principle.
Utility model content
The utility model provides a kind of square wave oscillation illustrative circuitry, circuit include amplifier composition square-wave oscillator and
Three voltage controlled current sources, three voltage controlled current sources are respectively by the output voltage of square-wave oscillator, positive and negative feedthrough voltage and negative-feedback electricity
Pressure changes electric current into, then respectively drives light emitting diode by electric current, and square wave is indicated by the brightness change image of three light emitting diodes
The variation of the output voltage of oscillator, positive and negative feedthrough voltage and negative feedback voltage, student are bright by three light emitting diodes of observation
Degree variation, it is readily appreciated that under non-delay positive feedback and lag negative-feedback collective effect, the output voltage of square-wave oscillator alternately becomes
Change, to understand the principle of circuit oscillation.
The specific technical solution that the utility model is taken is as follows：
A kind of square wave oscillation illustrative circuitry, including integrated transporting discharging U1~U4, resistance R1~R14, light emitting diode D0~D2,
Capacitance C1 and C2, one end of a terminating resistor R2 of wherein resistance R1, one end and capacitance C1 of resistance R3 anode, resistance R1's
Another termination+10V power supplys, the other end of resistance R2 and the cathode of capacitance C1 are all grounded；The normal phase input end of integrated transporting discharging U1 connects
The other end of resistance R3, one end and resistance R6 of resistance R4 one end, anti-phase input terminate the anode of capacitance C2, resistance R5 one
The one end at end and resistance R12 exports one end of the other end of terminating resistor R4, the other end and resistance R9 of resistance R5, capacitance C2
Cathode ground connection；One end of the other end and resistance R7 of the normal phase input end connecting resistance R6 of integrated transporting discharging U2, anti-phase input termination
The cathode of one end and light emitting diode D0 of resistance R8, the anode of output end sending and receiving optical diode D0, resistance R7's and R8 is another
End is all grounded；One end of the other end and resistance R10 of the normal phase input end connecting resistance R9 of integrated transporting discharging U3, anti-phase input termination electricity
The cathode of one end and light emitting diode D1 of R11 is hindered, the anode of output end sending and receiving optical diode D1, resistance R10's and R11 is another
End is all grounded；One end of the other end and resistance R13 of the normal phase input end connecting resistance R12 of integrated transporting discharging U4, anti-phase input termination
The cathode of one end and light emitting diode D2 of resistance R14, the anode of output end sending and receiving optical diode D2, resistance R13's and R14 is another
One end is all grounded；Integrated transporting discharging U1~U4 uses LM358 integrated transporting dischargings, is powered using+10V.
The beneficial effects of the utility model：The utility model is applied to the religion of the integrated transporting discharging content of analog electronics technique
It learns, the operation principle for the square-wave oscillator being made of integrated transporting discharging can be visually demonstrated, improve teaching effect.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of square wave oscillation illustrative circuitry, including integrated transporting discharging U1~U4, resistance R1~R14, luminous two
Pole pipe D0~D2, capacitance C1 and C2, one end of a terminating resistor R2, one end of resistance R3 and the capacitance C1 of wherein resistance R1 are just
Pole, another termination+10V power supplys of resistance R1, the other end of resistance R2 and the cathode of capacitance C1 are all grounded；Integrated transporting discharging U1 is just
Mutually one end of one end and resistance R6 of the other end of input terminating resistor R3, resistance R4, the anode of anti-phase input termination capacitance C2,
One end of one end and resistance R12 of resistance R5, the other end of output terminating resistor R4, the other end of resistance R5 and resistance R9 one
End, the cathode ground connection of capacitance C2；One end of the other end and resistance R7 of the normal phase input end connecting resistance R6 of integrated transporting discharging U2, reverse phase
Input the cathode of one end and light emitting diode D0 of terminating resistor R8, the anode of output end sending and receiving optical diode D0, resistance R7 and
The other end of R8 is all grounded；One end of the other end and resistance R10 of the normal phase input end connecting resistance R9 of integrated transporting discharging U3, reverse phase are defeated
Enter the cathode of one end and light emitting diode D1 of terminating resistor R11, the anode of output end sending and receiving optical diode D1, resistance R10 and
The other end of R11 is all grounded；One end of the other end and resistance R13 of the normal phase input end connecting resistance R12 of integrated transporting discharging U4, reverse phase
Input the cathode of one end and light emitting diode D2 of terminating resistor R14, the anode of output end sending and receiving optical diode D2, resistance R13
It is all grounded with the other end of R14；Integrated transporting discharging U1~U4 uses LM358 integrated transporting dischargings, is powered using+10V.
Integrated transporting discharging U1 and its peripheral cell constitute a square-wave oscillator for single supply work, wherein resistance R1 and R2 strings
Connection partial pressure, provides 2V reference voltages, it is ensured that positive feedback terminal voltage is more than 0, enables the normal work of square-wave oscillator under the conditions of single supply
Make.Resistance R3 and resistance R4 provides non-delay positive feedback, resistance R5 and capacitance C2, by the charge and discharge to capacitance C2, provides stagnant
Negative-feedback afterwards.Amplifier U2 and its peripheral cell, constitute first voltage-controlled electricity Heng Yuan, and the electric current for flowing through light-emitting diodes D0 is proportional to
The positive feedback terminal voltage of square-wave oscillator.Amplifier U3 and its peripheral cell constitute second voltage controlled current source, flow through luminous two
The electric current of pole D1 is proportional to the output end voltage of square-wave oscillator.Amplifier U4 and its peripheral cell constitute the voltage-controlled electricity of third
Heng Yuan, the electric current for flowing through light-emitting diodes D2 are proportional to the negative-feedback terminal voltage of square-wave oscillator.Due to capacitance C2, resistance R5 values
It is larger, it is slower to the charge and discharge of capacitance C2, oscillating circuit generate square wave frequency it is low, facilitate observation light emitting diode D0, D1 and
The brightness change of D2.
It is powered, observes that light emitting diode D2 goes out, light emitting diode D0 and D1 is bright, and light emitting diode D1 is very bright, shows to shake
Device output high level is swung, the brightness of light emitting diode D0 is about the half of the brightness of light emitting diode D1, shows positive and negative feedthrough voltage
Then the about half of output voltage observes that light emitting diode D2 is gradually bright, show that the charging to C2 is carrying out, negative-feedback end
Gradual voltage increase is big；When light emitting diode D2 brightness is more than the brightness of light emitting diode D0, light emitting diode D1 goes out suddenly, together
When, the brightness of light emitting diode D0 is dimmed, changes that moment, shows that negative-feedback terminal voltage is more than positive feedback terminal voltage, causes to shake
Device overturning output low level is swung, positive feedback terminal voltage is also synchronous to be reduced, and then, observes light emitting diode D2 brightness decrescence, table
Bright capacitance C2 electric discharges, cause negative-feedback terminal voltage gradually to drop.When light emitting diode D2 brightness is low crosses the brightness of light emitting diode D0,
Light emitting diode D1 is bright suddenly, meanwhile, the also variation of light emitting diode D0, brightness is about the half of light emitting diode D1 brightness,
Change that moment, show that negative-feedback terminal voltage is less than positive feedback terminal voltage, leads to oscillator overturning output high level, positive feedback end
Voltage is also synchronous to be risen, and then, is observed that light emitting diode D2 brightness is cumulative, is shown that capacitance C2 charges again, lead to negative-feedback end
Gradual voltage increase.Repeatedly, in cycles, show circuit normal oscillation, continually export square wave.
Claims (1)
1. a kind of square wave oscillation illustrative circuitry, it is characterized in that：Including integrated transporting discharging U1~U4, resistance R1~R14, light emitting diode
D0~D2, capacitance C1 and C2, one end of a terminating resistor R2 of wherein resistance R1, one end and capacitance C1 of resistance R3 anode,
Another termination+10V power supplys of resistance R1, the other end of resistance R2 and the cathode of capacitance C1 are all grounded；The positive of integrated transporting discharging U1
Input the other end of terminating resistor R3, one end and resistance R6 of resistance R4 one end, anti-phase input terminates anode, the electricity of capacitance C2
Hinder one end of one end and resistance R12 of R5, the other end of output terminating resistor R4, the other end of resistance R5 and resistance R9 one
End, the cathode ground connection of capacitance C2；One end of the other end and resistance R7 of the normal phase input end connecting resistance R6 of integrated transporting discharging U2, reverse phase
Input the cathode of one end and light emitting diode D0 of terminating resistor R8, the anode of output end sending and receiving optical diode D0, resistance R7 and
The other end of R8 is all grounded；One end of the other end and resistance R10 of the normal phase input end connecting resistance R9 of integrated transporting discharging U3, reverse phase are defeated
Enter the cathode of one end and light emitting diode D1 of terminating resistor R11, the anode of output end sending and receiving optical diode D1, resistance R10 and
The other end of R11 is all grounded；One end of the other end and resistance R13 of the normal phase input end connecting resistance R12 of integrated transporting discharging U4, reverse phase
Input the cathode of one end and light emitting diode D2 of terminating resistor R14, the anode of output end sending and receiving optical diode D2, resistance R13
It is all grounded with the other end of R14；Integrated transporting discharging U1~U4 uses LM358 integrated transporting dischargings, is powered using+10V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820374105.7U CN208077476U (en) | 2018-03-19 | 2018-03-19 | A kind of square wave oscillation illustrative circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820374105.7U CN208077476U (en) | 2018-03-19 | 2018-03-19 | A kind of square wave oscillation illustrative circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208077476U true CN208077476U (en) | 2018-11-09 |
Family
ID=64047243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820374105.7U Expired - Fee Related CN208077476U (en) | 2018-03-19 | 2018-03-19 | A kind of square wave oscillation illustrative circuitry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208077476U (en) |
-
2018
- 2018-03-19 CN CN201820374105.7U patent/CN208077476U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181109 Termination date: 20200319 |