CN2538099Y - DC changing into Ac voltage increasing and low noise circuit - Google Patents

Abstract

The utility model provides a circuit which can increase boost and decrease noise of conversion from dc to ac. The circuit comprises a low voltage-high voltage part and an ac electric switch part. The low voltage-high voltage part is formed by a transistor, an inductance, a capacitance, etc. connected in series, and the ac electric switch part consists of a plurality of transistors (generally referred to electric switches, such as MOSFET, thyristors, etc.) and a capacitance. The utility model has the main working principle that: signals that control the action of the transistors are boosted from low potential to high potential, thereby promoting fast action of the transistors, and when the boost stops, the signals are turned into the form of negative voltage level, so that the transistors cut off in a faster way; the electric switch part can also be replaced by the structure being in- series connected by a plurality of diodes, by which voltage with increased boost can also be acquired, and a current control method is also arranged in the discharging process to decrease noise produced in the boosting process.

Description

The direct current conversion exchanges and can increase the circuit that boosts and reduce noise

Technical field

The utility model relates to the circuit that a kind of direct current conversion exchanges, especially refer to that a kind of direct current conversion interchange can increase the circuit that boosts and reduce noise, it is improved at the known problem that can't overcome its congenital pressure barrier restriction as electronic components such as cold light film in low-voltage direct conversion high-voltage alternating process, enables to promote effectively output voltage.

Background of invention

Press, the pattern of cold light film (Electro Luminescent) is constantly brought forth new ideas on the market at present, and the utilization scope heals and becomes extensively, but the circuit structure that the direct current conversion of the driving cold light film that is used in exchanges is failed most as ideal, and demands industry further research and improvement urgently; So, described in No. the 117663rd, Taiwan patent, this circuit framework (as shown in Figure 1) that is applied to drive cold light film is the AC boosting circuit of an all-wave, and wherein the left side of dotted line is the part that low pressure raises and presses, and the right of dotted line is then for constituting the switch sections that exchanges; Can form the signal of a high pressure at the H point, but when through switch sections, because of the congenital pressure barrier problem of electronic component, it is about 10～30% that the high pressure that H is ordered will be decayed, so cause the discount of efficient.About this point, after the essence of its part of constantly concentrating on studies through the applicant, find, in fact, the ON of transistor (electronic switch) and OFF are that the signal of complying with its control end moves, but this efficient of boosting, the speed of electronic switch is an important key, when ending into OFF by ON, the time of its action is shorter, and then the high-voltage signal that inductance excited is higher, and just efficient will be better.General control is a-signal when being high potential, the Q1 conducting, and when a-signal was electronegative potential, Q1 ended; But because of Q1 itself has the existence of parasitic capacitance and the speed influence of itself speed of actions, limited its output, if accelerate its cut-off speed, then the output of Q1 will effectively improve, this technology is applied to the half-wave framework then as shown in Figure 2, be applied to all-wave and boost framework then as shown in figures 1 and 3, it all can effectively promote output voltage.

And for example patent No. 117663 described circuit framework that is applied to drive cold light film in Taiwan as shown in Figure 3, and reaches described in No. 090202291 case of Taiwan patent application about driving the circuit framework of cold light film, as shown in Figure 4; Wherein, as shown in Figure 5, and adopt same concept about the control signal waveform portion, if will be wherein the control signal of A, B be modified as shown in Figure 6 kenel, then then increased on the efficient about more than 20～30%.

The another kind of the present utility model framework that boosts also can improve the efficient that electronic switch causes.

For further understanding structure of the present utility model and effect thereof, below utilize several embodiment, cooperate diagram simultaneously, describing the utility model direct current conversion interchange in detail can increase the circuit that boosts and reduce noise, the constitution content of practice and the effect that can reach thereof.

Summary of the invention

For overcoming the defective of above-mentioned prior art, the purpose of this utility model is to propose a kind of direct current conversion interchange can increase the circuit that boosts and reduce noise, can promote output voltage simultaneously and overcome the congenital pressure barrier of electronic component problem, and reduce the noise in the direct current conversion communication process.

For reaching above-mentioned purpose, the utility model proposes a kind of direct current conversion interchange can increase the circuit that boosts and reduce noise, and comprising: at least one booster circuit, each booster circuit comprise the transistor and the inductance of mutual series connection at least; And two electronic AC switches; Wherein booster circuit is exported a high voltage to exchanging electronic switch, and is transferred to a load through electronic AC switch; Wherein this two electronic ac switch is respectively one first diode, reaches one second diode, and is connected between load and the booster circuit.

Foregoing circuit comprises two booster circuits, each booster circuit comprises the first transistor, an inductance and the transistor seconds of mutual series connection successively, inductance is connected between the collector electrode of the collector electrode of the first transistor and transistor seconds, and the emitter grounding of transistor seconds; Wherein dc control signal is added on first, second transistorized base stage respectively; In addition, the collector electrode of the transistor seconds in each booster circuit also is connected with the anode of first or second diode respectively, and the negative terminal of two diodes is connected with load respectively again; Control signal is exported a high pressure in turn and is given the load two ends respectively through each booster circuit and each diode, constitutes the high-voltage AC signal at load two ends.

Foregoing circuit can also comprise first booster circuit and second booster circuit, and wherein first booster circuit comprises the first transistor, first inductance, the first protection diode and the transistor seconds of mutual series connection successively; The collector electrode and first that first inductance is connected in the first transistor protects between the anode of diode, and the negative terminal of the first protection diode is connected with the collector electrode of transistor seconds, and the emitter grounding of transistor seconds; The first protection diode protection transistor seconds prevents its collapse; Second booster circuit comprises the 3rd transistor, second protection diode, second inductance and the 4th transistor of mutual series connection successively; The 3rd transistorized collector electrode is connected with the anode of the second protection diode, and second inductance is connected between the negative terminal and the 4th transistorized collector electrode of the second protection diode, and the 4th transistorized emitter grounding; The second protection diode protection the 3rd transistor prevents its collapse; The first diode anode is connected between the anode and first inductance of the first protection diode, the second diode negative terminal is connected between the negative terminal and second inductance of the second protection diode, and an end of load is connected between the anode of the negative terminal of first diode and second diode other end ground connection of load; Wherein dc control signal is added on this first, second, third, fourth transistorized base stage, and exports a high pressure in turn through two booster circuits, two diodes respectively and give load, constitutes the high-voltage AC signal at load two ends.

Foregoing circuit also can install a Dolby circuit at the load two ends respectively additional, each Dolby circuit comprises the resistance and a transistor of mutual series connection respectively, resistance one end is connected with load, and the other end is connected with transistorized collector electrode, and transistorized emitter grounding.

Also can be in the electronic ac switch of this circuit by its fixed current mode of control with slow discharge, reduce direct current and deliver and flow through the noise that produces in the journey to reach.

Description of drawings

Fig. 1 is the circuit configurations figure that a known all-wave is boosted;

Fig. 2 is the conspectus that a known half-wave boosts;

Circuit configurations full figure and local switch structural map that Fig. 3 boosts for another known all-wave;

Fig. 4 is again the circuit configurations figure that a known all-wave is boosted;

Fig. 5 is the control signal waveform schematic diagram according to Fig. 3;

Fig. 6 is another control signal waveform schematic diagram according to Fig. 3;

Fig. 7 is the preferred application illustration that the utility model is actual to be implemented;

Fig. 8 is the control signal waveform schematic diagram according to Fig. 7;

Fig. 9 is another preferred application illustration that the utility model is actual to be implemented;

Figure 10 is the control signal waveform schematic diagram according to Fig. 9;

Figure 11 is the waveform schematic diagram of the high-voltage AC signal of a known load;

Figure 12 is the waveform schematic diagram of another load driving high-voltage AC signal of the present utility model;

Figure 13 is the utility model waveform schematic diagram of a load driving high-voltage AC signal again;

Figure 14 is the preferred application line map again that the utility model is actual to be implemented;

Figure 15 is according to the control signal of Figure 14 and output waveform schematic diagram;

The oscillogram that Figure 16 is made into for application drawing 2 frameworks;

Another oscillogram that Figure 17 is made into for application drawing 2 frameworks;

Figure 18 is the another preferred application line map that the utility model is actual to be implemented;

Figure 19 is known control circuit structural map;

Figure 20 is the another load driving high-voltage AC signal of a utility model waveform schematic diagram;

The oscillogram that Figure 21 is made into for application drawing 8 frameworks;

Figure 22 is for using the oscillogram that Figure 10 framework is made into;

Figure 23 is the waveform schematic diagram of the another load driving high-voltage AC signal of the utility model.

Embodiment

At first, please refer to line frame composition shown in Figure 7, the utility model provides a kind of capacity load direct current conversion to exchange can increase the circuit that boosts and reduce noise, as seen in Fig., this circuit structure includes on selecting for use at least: several transistors Q1～Q5, several diodes D1, D2, and suitably collocation is made up of electronic components such as inductance, electric capacity; Wherein this capacity load about one group of booster circuit is respectively arranged, when move the left side, the Q4 conducting in the transistor, Q5 closes, the Q1 conducting, Q3 closes, and through a period of time, H1 names a person for a particular job and rises to a high pressure conditions control signal B of Q2 (cooperation is consulted shown in Figure 8 in the lump), at this moment, transistor Q2 can stop action, and Q1 closes, the Q3 conducting, then H1 point moment is released electric charge and after reducing near zero potential by high pressure through Q3, transistor Q4 can close, the Q6 conducting, and Q5 then moves according to the E signal, again through after a while, H2 also reaches a high potential, Q4 conducting afterwards, and Q6 closes, Q5 stops action, and the H2 point is reduced near zero potential by the high potential electric charge of releasing.So, go round and begin again, the high voltage that produces in regular turn at the two ends of capacity load has promptly formed a high-voltage AC signal, the electronic switch of frame of broken lines during the advantage of these lattice is to have replaced among Fig. 1 with D1, D2 will be so the signal that is attached in the load will be more efficient just.

As shown in Figure 9, be another kind of seemingly above-mentioned better lines framework; Wherein: as Q3, when Q4 is OFF, the Q1 conducting, Q2 is according to the B control signal action of Figure 10.The H point will arrive a high pressure spot after a period of time, Q1, Q2 close, the Q4 conducting, and Q3 moves according to the C control signal.The H point is discharged near zero potential through D3, L2, Q4 by high pressure earlier, and move because of the negative pressure that rises of L2 and Q3 the back, and after after a while, the H point arrives a negative high voltage; This moment Q3, Q4 OFF, the Q1 conducting, Q2 action, H point is recharged to zero potential by negative high voltage, answers and charges through positive high voltage point.So circulation forms a high-voltage AC signal that even continues, as shown in figure 10.

The use of D1, D4 mainly is for preventing that transistorized collapse from setting up in the above-mentioned line architecture; With D4, when Q1, Q2 action, Q3, when Q4 closes, the H point has a positive high voltage signal, the K point also is a positive high voltage signal, the Q4 of this moment is a closed condition, because of Q4 is a NPN type crystal, extremely to a certain degree be unlikely collapse so the C utmost point of Q4 can bear positive high voltage, but Q3 is a PNP transistor, its C utmost point can't bear the positive high voltage signal, so increase the situation of a D4 diode to prevent to cause high pressure to lose efficacy because of collapse; In like manner, D1 is also for preventing that Q2 from can't bear negative high voltage and adding.In addition, cooperate again that aforementioned change control signal position is accurate to become negative pressure or greater than the method for the malleation of VDD, then whole efficiency increases especially if adopt Fig. 7 and Fig. 9.

No matter above-mentioned is that a kind of line architecture, all can only still have a kind of situation that is perplexing the user, i.e. disturbance state with the DC boosting of low-voltage signal to the high pressure AC signal; Usually this kind Drive Structure can be shared with other IC or electronic component, but can produce the interference signal of a high frequency via the action of boosting reluctantly, even the noise that people's ear can be heard degree can occur.For solving this phenomenon, below special aforesaid three kinds of line architectures are designed again.Seeing also shown in Figure 11ly, is the driving high-voltage AC signal of a load, and this high-voltage AC signal all can be by obtaining in aforementioned three kinds of line architectures, and the most frequent generation interference signal part of the part that encloses among figure system.The most desirable wave mode is Sinusoidalwave, but reach perfect Sinusoidal wave and often need spend more complicated line architecture, and this is not this case original meaning, therefore, with wave mode shown in Figure 11, should simply be modified to as Figure 12 or kenel shown in Figure 13, will be a feasible method.

And with in the disclosed line architecture of known Fig. 1, revise a little again, please cooperate consult shown in Figure 14, as long as increase by two resistance and two transistors, just can reach above-mentioned wave mode shown in Figure 12, as for its control signal and output mode chart then as shown in Figure 15.

Secondly, again with known Fig. 2, R wherein can give current limliting and reach when beginning to discharge, and its oscillogram can be consulted shown in Figure 16.The big young pathbreaker of R value determines the slope of H, though this idea when the R value is 0 (capacity load sparks) to get well, it is perfect not attain ideal yet.And the better practice is to allow the R value be 0, but by the B signal of Fig. 2 or B and the transistorized conducting electric current of C signal controlling of Figure 14, cooperates the change of a-signal frequency range again, can reach effect as shown in figure 17.Because the frequency range of Ad changes, the Ha place will form more slick and sly mitigation, the stool and urine of its discharging current of Ib place control can obtain the waveform of Hb, makes the waveform of h will more can be near Sinusoidal wave, just so can reduce the interference and the noise of capacity load such as cold light film.

Moreover, as shown in figure 18, for a kind of better practice and need not increase under any additional parts, directly change the electric current of control signal, and reach required purpose; Wherein, as C=" H " (high potential), E=" H " time, H2 equals ground connection, and works as B=" L " (electronegative potential), D=" L ", H1 will charge to high voltage over time, at this moment, A stops feed signals, and H1 names a person for a particular job and keeps a high-tension electricity state in theory, and at this moment D sends into a stable fixing little electric current, then Q8 will be a high impedance conducting state, and H1 then slowly discharges via Q8 and obtains the shown waveform of Figure 12; Otherwise H2 is as the same.Certainly the control of fixed current has many methods, is one as shown in figure 19 than general implementation application illustration, and it can be controlled via the Q8 of Figure 18 or Q9 mat fixed current mode and discharge; Further again, if it is non-for fixing to be controlled at the Control current of discharge time, but along with the time increases slowly, or control increases in time slowly through the discharging current of Q8 or Q9, just can reach the ideal waveform that shows as Figure 13.

Please continuing, it is shown in Figure 20 to consult again, and this line architecture is that the control signal figure that is revised is disturbed in reduction; Wherein T1 is fixing little electric current for expression B signal, and Q2 is the high impedance conducting state, and T2 represents that then a-signal is fixing little electric current, and Q1 also is the high impedance conducting state.

Utilize above-mentioned correcting mode the signal waveform modification of earlier figures 8 to be become the kenel of Figure 21 again; Wherein the Q3 of T1 presentation graphs 7 is the high impedance conducting state, and the T2 then Q4 of presentation graphs 7 is the high impedance conducting state.And the signal waveform that can reduce noise that Figure 10 is modified as Figure 22; Wherein the Q4 of T1 presentation graphs 9 is the high impedance conducting state, and the Q1 of T2 diagrammatic sketch 9 is the high impedance conducting state.And further again, change the control signal of boosting, can make output waveform more near the kenel of Sinusoidal wave, as shown in figure 23.

In sum, direct current conversion of the present utility model exchanges and can increase the circuit that boosts and reduce noise, really can have both simultaneously has the lifting output voltage, and overcomes the congenital pressure of electronic component barrier problem, and the advantage and the practicality that reduce noise problem in the direct current conversion communication process etc.

Claims (5)

1, a kind of direct current conversion exchanges and can increase the circuit that boosts and reduce noise, and comprising: at least one booster circuit, each booster circuit comprise the transistor and the inductance of mutual series connection at least; And two electronic AC switches; Wherein booster circuit is exported a high voltage to exchanging electronic switch, and is transferred to a load through electronic AC switch; It is characterized in that:

This two electronic ac switch is respectively one first diode, reaches one second diode, and is connected between load and the booster circuit.

2, direct current conversion as claimed in claim 1 exchanges and can increase the circuit that boosts and reduce noise, it is characterized in that: this circuit comprises two booster circuits, each booster circuit comprises the first transistor, an inductance and the transistor seconds of mutual series connection successively, inductance is connected between the collector electrode of the collector electrode of the first transistor and transistor seconds, and the emitter grounding of transistor seconds; Wherein dc control signal is added on first, second transistorized base stage respectively; In addition, the collector electrode of the transistor seconds in each booster circuit also is connected with the anode of first or second diode respectively, and the negative terminal of two diodes is connected with load respectively again; Control signal is exported a high pressure in turn and is given the load two ends respectively through each booster circuit and each diode, constitutes the high-voltage AC signal at load two ends.

3, direct current conversion as claimed in claim 1 exchanges and can increase the circuit that boosts and reduce noise, it is characterized in that: this circuit comprises first booster circuit and second booster circuit, and wherein first booster circuit comprises the first transistor, first inductance, the first protection diode and the transistor seconds of mutual series connection successively; The collector electrode and first that first inductance is connected in the first transistor protects between the anode of diode, and the negative terminal of the first protection diode is connected with the collector electrode of transistor seconds, and the emitter grounding of transistor seconds; The first protection diode protection transistor seconds prevents its collapse;

Second booster circuit comprises the 3rd transistor, second protection diode, second inductance and the 4th transistor of mutual series connection successively; The 3rd transistorized collector electrode is connected with the anode of the second protection diode, and second inductance is connected between the negative terminal and the 4th transistorized collector electrode of the second protection diode, and the 4th transistorized emitter grounding; The second protection diode protection the 3rd transistor prevents its collapse;

The first diode anode is connected between the anode and first inductance of the first protection diode, the second diode negative terminal is connected between the negative terminal and second inductance of the second protection diode, and an end of load is connected between the anode of the negative terminal of first diode and second diode other end ground connection of load;

Wherein dc control signal is added on this first, second, third, fourth transistorized base stage, and exports a high pressure in turn through two booster circuits, two diodes respectively and give load, constitutes the high-voltage AC signal at load two ends.

4, direct current conversion as claimed in claim 1 exchanges and can increase the circuit that boosts and reduce noise, it is characterized in that: the load two ends install a Dolby circuit respectively additional, each Dolby circuit comprises the resistance and a transistor of mutual series connection respectively, resistance one end is connected with load, the other end is connected with transistorized collector electrode, and transistorized emitter grounding.

5, direct current conversion as claimed in claim 1 exchanges and can increase the circuit that boosts and reduce noise, it is characterized in that: also can be in the electronic ac switch of this circuit by its fixed current mode of control with slow discharge, reduce direct current and deliver and flow through the noise that produces in the journey to reach.

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