CN102638226A - Multi-path adjustable self-excited multivibrator - Google Patents
Multi-path adjustable self-excited multivibrator Download PDFInfo
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- CN102638226A CN102638226A CN201210106605XA CN201210106605A CN102638226A CN 102638226 A CN102638226 A CN 102638226A CN 201210106605X A CN201210106605X A CN 201210106605XA CN 201210106605 A CN201210106605 A CN 201210106605A CN 102638226 A CN102638226 A CN 102638226A
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Abstract
The invention discloses a multi-path adjustable self-excited multivibrator. Under the condition that an external trigger signal does not exist, the multivibrator can continuously, periodically and automatically generate rectangular pulses and can be set according to different required frequencies, different width ratios and the number of controllable paths. The type of circuit can be widely applied in various living fields. The circuit is a symmetric multi-path adjustable self-excited multivibrator consisting of a triode, a capacitor and a waveband switch serving as a core element. The circuit does not have a stable state; switch on and switch off of the triode are controlled by charging and discharging of the capacitor; and the circuit automatically excites between two transient states.
Description
Technical field
The present invention relates to the adjustable astatic multivibrator of a kind of multichannel, be mainly used in the temporary stable state regulation and control of self-excitation electronic switch.
Background technology
Oscillating circuit generally is made up of elements such as resistance, inductance, electric capacity and electronic device.By the inductance coil L lc circuit that forms that links to each other with capacitor C is the simplest a kind of oscillating circuit, and its natural frequency is f=[sx (] 1 [] 2 π lc.But several kinds of traditional LC oscillating circuit, quartz crystal oscillator circuit and RC oscillating circuits etc. all operating frequency of some defective such as RC oscillator are lower, and frequency stability is not high, but circuit is simple, and frequency range is big, uses in the low-frequency range of being everlasting.And traditional oscillating circuit is by the two-stage inverting amplifier, and the capacitance resistance coupling also connects into the regenerative feedback loop formation, all needs one or more oscillation sources to come when a kind of circuit that just can produce AC signal output without extrinsic motivated voluntarily of triggering signal.It is used in the electronic science and technology field widely, like signal source in the local oscillator in carrier of transmitter oscillator, the receiver in the communication system, Medical Instruments and the measuring instrument etc.
Summary of the invention
The object of the present invention is to provide the adjustable astatic multivibrator of a kind of multichannel, this multivibrator is in that do not have can be continuous under the situation of external trigger signal, the automatic generation rectangular pulse in cycle; Can account for wide ratio according to the frequency of different needs, and controllable way; Be provided with, this type of circuit can have a wide range of applications in many fields of life, and this circuit is with triode and electric capacity; Band switch is the adjustable self-excited oscillator of multichannel of the symmetry of core components and parts composition; Sort circuit does not have stable state, the charging of electric capacity and conducting that triode is controlled in discharge is arranged and end, thereby make circuit vibration voluntarily between two transient state.
Technical scheme of the present invention is: the adjustable astatic multivibrator of a kind of multichannel, the adjustable astatic multivibrator of this multichannel comprise two-way self-maintained circuit multichannel band switch circuit; Wherein self-maintained circuit is a charge and discharge process alternately; Circuit symmetrical; But component parameter can not be in full accord; Therefore the moment that powers on two triodes state variation has just taken place, this changes because the effect of positive feedback is more and more stronger, causes arriving a temporary stable state. the conducting through electric capacity progressively charges after of another triode perhaps ends between steady state period temporarily; State overturns; Arrive another temporary stable state. go round and begin again like this conducting that forms this process control triode of vibration Q1, Q2, Q3, Q4 with end, by operating state decision Q5, Q6 conducting and the cut-off state of triode Q1, Q2, Q3, Q4, so just play the purpose of the big electric current high-power circuit of controlling the back.Multichannel band switch circuit 2 then is through selecting the size of the discharge resistance resistance in the circuit, coming the frequency of oscillation in the control circuit.Wherein (1) and (3) is the self-excitation resonant circuit of symmetry in the adjustable self-maintained circuit of multichannel, is by DC power supply+12 by symmetrical astatic multivibrator, triode Q1, Q2, Q3; Q4, NMOS manages Q5, Q6, capacitor C 1, C2; C3, C4, C5, C6, C7; C8, resistance R 1.......R19, diode D1, the symmetrical astatic multivibrator that D2 constitutes.Wherein self-maintained circuit (1) is that collector electrode by triode Q1, Q2 has a capacitor C 2 respectively; C3 receives the base stage of another pipe; Play the AC coupled effect, form regenerative circuit, triode Q1, Q2 emitter be connected to through resistance R 1+the 12v power supply in.Capacitor C 2, C3 both sides be series connection discharge resistance R3, R17 respectively, and R9, R10, R11 work as discharge resistance.When the moment of energized; Certain pipe is logical earlier; The another pipe ends, and at this moment, the current collection collection of conducting pipe has output; The electric capacity of collector electrode makes the conducting of another pipe with the base stage that pulse signal is coupled to the another pipe. and the pipe of at this moment original conducting ends. and such two pipes take turns conducting and ending, and have just produced the concussion electric current.Oscillating circuit is parallel to NMOS pipe Q5 through voltage stabilizing didoe D1, through filter capacitor C7 filtering output.Element connected mode in the self-maintained circuit and just the same.Self-maintained circuit is the band switch SR26 by 3 grades 4; Resistance R 17, R16, R15 are parallel to 13,14,15 pin of SR26 respectively; They are frequency of oscillation and the duty ratio of control self-maintained circuit; In like manner then to be parallel to resistance R 18, R19, R20 respectively by 3,4,5 pin of band switch last for self-maintained circuit, is connected to circuit through selecting one in three resistance, just filters out needed frequency.1,2,3,6,7,8,9,10,11,12 pin of band switch SR26 insert the negative pole of power supply.No external trigger signal can be continuous, the periodic rectangular pulse that produces automatically.Can select different discharge resistances through band switch, thereby play the frequency of oscillation of regulating oscillator, variable connector can be controlled the frequency of multichannel output simultaneously simultaneously.High-power NMOS pipe, it is characterized in that through astatic multivibrator control NMOS pipe conducting with end, thereby it is high-power to arrive control, the effect of large current load.
The invention has the advantages that: this circuit advantage is that circuit is simple, and low preparation cost only needs some to hold resistance, and triode, and circuit is reliable and stable.Can adjust the control frequency of exporting in the circuit simultaneously according to the circuit needs.May command is high-power, the load of big electric current.
Description of drawings
Fig. 1 is the adjustable astatic multivibrator circuit diagram of multichannel of the present invention.
Embodiment
The adjustable astatic multivibrator of a kind of multichannel, the adjustable astatic multivibrator of this multichannel comprise two-way self-maintained circuit 1,3 multichannel band switch circuit 2; Wherein self-maintained circuit the 1, the 3rd, charge and discharge process alternately; Circuit symmetrical; But component parameter can not be in full accord; Therefore the moment that powers on two triodes state variation has just taken place, this changes because the effect of positive feedback is more and more stronger, causes arriving a temporary stable state. the conducting through electric capacity progressively charges after of another triode perhaps ends between steady state period temporarily; State overturns; Arrive another temporary stable state. go round and begin again like this conducting that forms this process control triode of vibration Q1, Q2, Q3, Q4 with end, by operating state decision Q5, Q6 conducting and the cut-off state of triode Q1, Q2, Q3, Q4, so just play the purpose of the big electric current high-power circuit of controlling the back.Multichannel band switch circuit (2) then is through selecting the size of the discharge resistance resistance in the circuit, coming the frequency of oscillation in the control circuit.In the adjustable self-maintained circuit of multichannel wherein 1 and 3 be the symmetry the self-excitation resonant circuit, be by DC power supply+12 by symmetrical astatic multivibrator, triode Q1, Q2, Q3; Q4, NMOS manages Q5, Q6, capacitor C 1, C2; C3, C4, C5, C6, C7; C8, resistance R 1.......R19, diode D1, the symmetrical astatic multivibrator that D2 constitutes.Wherein self-maintained circuit (1) is that collector electrode by triode Q1, Q2 has a capacitor C 2 respectively; C3 receives the base stage of another pipe; Play the AC coupled effect, form regenerative circuit, triode Q1, Q2 emitter be connected to through resistance R 1+the 12v power supply in.Capacitor C 2, C3 both sides be series connection discharge resistance R3, R17 respectively, and R9, R10, R11 work as discharge resistance.When the moment of energized; Certain pipe is logical earlier; The another pipe ends, and at this moment, the current collection collection of conducting pipe has output; The electric capacity of collector electrode makes the conducting of another pipe with the base stage that pulse signal is coupled to the another pipe. and the pipe of at this moment original conducting ends. and such two pipes take turns conducting and ending, and have just produced the concussion electric current.Oscillating circuit is parallel to NMOS pipe Q5 through voltage stabilizing didoe D1, through filter capacitor C7 filtering output.Element connected mode in the self-maintained circuit 3 and 1 just the same.Self-maintained circuit 2 is the band switch SR26 by 3 grades 4; Resistance R 17, R16, R15 are parallel to 13,14,15 pin of SR26 respectively; They are frequency of oscillation and the duty ratio of control self-maintained circuit 1; It is last that in like manner 33,4,5 pin by band switch of self-maintained circuit are parallel to resistance R 18, R19, R20 respectively, is connected to circuit through selecting one in three resistance, just filters out needed frequency.1,2,3,6,7,8,9,10,11,12 pin of band switch SR26 insert the negative pole of power supply.No external trigger signal can be continuous, the periodic rectangular pulse that produces automatically.Can select different discharge resistances through band switch, thereby play the frequency of oscillation of regulating oscillator, variable connector can be controlled the frequency of multichannel output simultaneously simultaneously.In controlling the conducting of NMOS pipe through astatic multivibrator and ending, high-power thereby arrival is controlled, the effect of large current load.
1) transient state one: the saturation conduction of triode Q2, capacitor C3 begin discharge (reverse charging), and triode Q1 ends, and capacitor C2 begins charging.Phenomenon has or not control signal output for-OUTA.
The completion of discharging of eve, C2, the discharge result makes C2 and the pole plate that the Q2 base stage is coupled be promoted to 0.7V, causes Q2 to turn to the saturation conduction state by cut-off state; The pole plate of positively charged that the saturation conduction of Q2 makes previous moment accomplish the C3 of charging is connected (ground connection) with the some position zero point, because " voltage at capacitor two ends can not suddenly change ", the negative pole of C3 can produce " negative jump pulse " some position moment and become negative value, because the base stage of the negative pole of C3 and Q1 is coupled; Then the base stage of Q1 receives negative potential control, makes Q1 turn to cut-off state by conducting state, and at this moment, C2 continues by power supply+12; C2, R3, the loop charging that Q2 constitutes, the utmost point positively charged that C2 is linked to each other with R3; A limit position that is coupled with the Q2 base stage is zero, and C3 begins via power supply+12, Q2; C3, R9 constitutes the loop discharge.Because the conducting of Q2, make Q5 conducting and then the output circuit of control-OUTA.
2) transient state two: the saturation conduction of triode Q1, capacitor C2 begin the discharge (reverse charging), triode Q2 ends, capacitor C3 begin the charging.Ending of Q2 makes Q5 also end, and-OUTA is turned off.
To make the pole plate point position that C3 links to each other with the Q2 collector electrode be zero in the continuous discharge of capacitor C 3 in the transient state one, and the pole plate point of the base stage coupling of C3 and Q1 has the amplitude of " bearing jump pulse " constantly to raise, when crossing zero point, when rising to 0.7V; The base potential of Q1 also causes Q1 to turn to the saturation conduction state by cut-off state with rising to 0.7v, the conducting of the Q1 charging process of C2 that is through with, and the pole plate of C2 positively charged is linked to each other with zero potential point (ground connection) through Q1, and current potential moment of this pole plate is zero; But because " voltage at capacitor two ends can not suddenly change ", " negative jump pulse " can take place in another pole plate moment of C2, and making potential jump is negative value, because the coupling of the base stage of this pole plate Q2; The base stage of Q2 receives negative potential control, makes Q2 that saturation conduction state shift cut-off state arranged, and this moment, C3 continued by power supply+12, R10; C3, Q1 constitutes discharge loop; The utmost point positively charged that C3 is linked to each other with R10, an electrode potential that is coupled with the Q1 base stage is zero, C2 begins via power supply+12; R16, C2, Q1 constitutes the loop.Q5 becomes cut-off state by conducting state ,-OUTA no-output.
In sum, because the operating state that discharges and recharges the control triode of capacitor, discharging and recharging that two capacitors replace caused two transient state in the circuit.
But in the use of time, people possibly need an output control incessantly, possibly need control the output control of the different frequencies of oscillation of two-way or multichannel simultaneously; So can pass through band switch, the discharge resistance that gating is different is like the R15 among the figure; R16, the optional different resistance of R17, the frequency of resonance is just different so; This circuit can also can be adjusted capacitance that discharges and recharges and resistance value in the circuit according to the needs of oneself, through band switch SR26 to being called a plurality of identical circuit simultaneously; Reach multichannel output, the output control of many frequencies of oscillation.This circuit is output as example with the two-way among the figure one.
3) valuation of circuit parameter; According to the principle of astatic multivibrator, be purpose with the side circuit function, circuit element parameter is carried out valuation calculate.If choosing the multiplication factor of triode is β=10, model 2C8550, direct voltage source are 12V; Triode work is not operated in magnifying state for ending and saturated two states in circuit, and triode serves as the role of switch; When triode Q1 was operated in saturation condition, direct voltage source all was added in resistance R 3 two ends like figure one, so the Q1 collector current is: Ic=12/R3; R3=10k, Ic=1mA
The current relationship of the collector current Ic base stage of triode Q1: Ic=β Ib, then base current is: Ib=Ic/ β=1mA/10=0.1mA, then resistance value R9=12/Ib=12/0.1=100k;
Since capacitance discharges time constant T=RC, so electric capacity is unsuitable excessive, optional nanofarad range capacitor C 2=10nf, C3=0.1nf.Selected three discharge resistance R15=750k according to circuit needs figure one, R16=430k, R17=270k is three output frequencies of output control one, in like manner in output control two, figure one has also selected the circuit of complete symmetry.Output control two frequencies are the same with output control.
Claims (4)
1. adjustable astatic multivibrator of multichannel, it is characterized in that: the adjustable astatic multivibrator of this multichannel comprises two-way self-maintained circuit (1), (3) multichannel band switch circuit (2); Wherein self-maintained circuit (1), (3) are the conductings that form this process control triode of vibration Q1, Q2, Q3, Q4 of alternately charge and discharge process and end; Operating state decision Q5, Q6 conducting and the cut-off state of triode Q1, Q2, Q3, Q4; Multichannel band switch circuit (2) is through selecting the size of the discharge resistance resistance in the circuit, coming the frequency of oscillation in the control circuit; Wherein (1) and (3) is the self-excitation resonant circuit of symmetry in the adjustable self-maintained circuit of multichannel; By symmetrical astatic multivibrator is by DC power supply+12; Triode Q1, Q2, Q3, Q4, NMOS pipe Q5, Q6, capacitor C 1, C2, C3, C4, C5, C6, C7, C8; Resistance R 1.......R19, diode D1, the symmetrical astatic multivibrator that D2 constitutes; Wherein self-maintained circuit (1) is that collector electrode by triode Q1, Q2 has a capacitor C 2 respectively; C3 receives the base stage of another pipe; Play the AC coupled effect, form regenerative circuit, triode Q1, Q2 emitter be connected to through resistance R 1+the 12v power supply in; Capacitor C 2, C3 both sides are series connection discharge resistance R3, R17 respectively, and R9, R10, R11 work as discharge resistance; When the moment of energized, certain pipe is logical earlier, and the another pipe ends; At this moment; The current collection collection of conducting pipe has output, and the electric capacity of collector electrode makes the conducting of another pipe with the base stage that pulse signal is coupled to the another pipe. and the pipe of at this moment original conducting ends. and such two pipes take turns conducting and ending, and have just produced the concussion electric current; Oscillating circuit is parallel to NMOS pipe Q5 through voltage stabilizing didoe D1, through filter capacitor C7 filtering output; Element connected mode in the self-maintained circuit (3) is just the same with (1); Self-maintained circuit (2) is the band switch SR26 by 3 grades 4; Resistance R 17, R16, R15 are parallel to 13,14,15 pin of SR26 respectively; They are frequency of oscillation and the duty ratio of control self-maintained circuit (1); In like manner then to be parallel to resistance R 18, R19, R20 respectively by 3,4,5 pin of band switch last for self-maintained circuit (3), is connected to circuit through selecting one in three resistance, just filters out needed frequency; 1,2,3,6,7,8,9,10,11,12 pin of band switch SR26 insert the negative pole of power supply.
2. according to the adjustable astatic multivibrator of the said multichannel of claim 1, it is characterized in that: described no external trigger signal, can be continuous, the periodic rectangular pulse that produces automatically.
3. according to the adjustable astatic multivibrator of the said multichannel of claim 1; It is characterized in that: can select different discharge resistances through band switch; Thereby play the frequency of oscillation of regulating oscillator, variable connector can be controlled the frequency of multichannel output simultaneously simultaneously.
4. according to the adjustable astatic multivibrator of the said multichannel of claim 1, it is characterized in that: the conducting through astatic multivibrator control NMOS pipe with end, thereby it is high-power to arrive control, the effect of large current load.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106712488A (en) * | 2017-04-05 | 2017-05-24 | 合肥云杉光电科技有限公司 | Main control chip circuit and method of PFC (power factor correction) switch power source |
| CN107658931A (en) * | 2017-09-28 | 2018-02-02 | 宁波大叶园林设备股份有限公司 | Has the charging snowplough of lithium battery multi resonant superimposed voltage element circuit |
| CN107733013A (en) * | 2017-09-28 | 2018-02-23 | 宁波大叶园林设备股份有限公司 | Has the gardens machine of lithium cell charging control unit circuit |
| CN107750580A (en) * | 2017-09-28 | 2018-03-06 | 宁波大叶园林设备股份有限公司 | Has the charging grass-mowing machine of lithium battery multi resonant superimposed voltage element circuit |
| CN107750581A (en) * | 2017-09-28 | 2018-03-06 | 宁波大叶园林设备股份有限公司 | Has the gardens machine of lithium battery voltage converter unit circuit |
| CN107761632A (en) * | 2017-09-28 | 2018-03-06 | 宁波大叶园林设备股份有限公司 | What tool lithium battery multi resonant superimposed voltage element circuit multitube was eliminated the noise blows leaf machine |
| CN107785956A (en) * | 2017-09-28 | 2018-03-09 | 宁波大叶园林设备股份有限公司 | Has the brush cutter of lithium battery multi resonant superimposed voltage element circuit |
| CN107801474A (en) * | 2017-09-28 | 2018-03-16 | 宁波大叶园林设备股份有限公司 | Has the gardens machine of lithium battery electric core temperature detecting unit circuit |
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| CN106712488A (en) * | 2017-04-05 | 2017-05-24 | 合肥云杉光电科技有限公司 | Main control chip circuit and method of PFC (power factor correction) switch power source |
| CN106712488B (en) * | 2017-04-05 | 2023-10-27 | 合肥云杉光电科技有限公司 | Main control chip circuit and method of PFC switching power supply |
| CN107658931A (en) * | 2017-09-28 | 2018-02-02 | 宁波大叶园林设备股份有限公司 | Has the charging snowplough of lithium battery multi resonant superimposed voltage element circuit |
| CN107733013A (en) * | 2017-09-28 | 2018-02-23 | 宁波大叶园林设备股份有限公司 | Has the gardens machine of lithium cell charging control unit circuit |
| CN107750580A (en) * | 2017-09-28 | 2018-03-06 | 宁波大叶园林设备股份有限公司 | Has the charging grass-mowing machine of lithium battery multi resonant superimposed voltage element circuit |
| CN107750581A (en) * | 2017-09-28 | 2018-03-06 | 宁波大叶园林设备股份有限公司 | Has the gardens machine of lithium battery voltage converter unit circuit |
| CN107761632A (en) * | 2017-09-28 | 2018-03-06 | 宁波大叶园林设备股份有限公司 | What tool lithium battery multi resonant superimposed voltage element circuit multitube was eliminated the noise blows leaf machine |
| CN107785956A (en) * | 2017-09-28 | 2018-03-09 | 宁波大叶园林设备股份有限公司 | Has the brush cutter of lithium battery multi resonant superimposed voltage element circuit |
| CN107801474A (en) * | 2017-09-28 | 2018-03-16 | 宁波大叶园林设备股份有限公司 | Has the gardens machine of lithium battery electric core temperature detecting unit circuit |
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