CN201541207U - Electric signal conversion circuit - Google Patents
Electric signal conversion circuit Download PDFInfo
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- CN201541207U CN201541207U CN2009200735888U CN200920073588U CN201541207U CN 201541207 U CN201541207 U CN 201541207U CN 2009200735888 U CN2009200735888 U CN 2009200735888U CN 200920073588 U CN200920073588 U CN 200920073588U CN 201541207 U CN201541207 U CN 201541207U
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Abstract
The utility model provides an electric signal conversion circuit, aiming at solving the problem that the rectifying and boosting circuit has complex implementation and comprising a rectifying circuit, a filter circuit and an additional adjusting circuit, wherein the rectifying circuit is used for rectifying an alternating current electric signal (VAC) into a first direct current signal; the filter circuit is used for filtering the first direct current signal and generating a second direct current signal, and comprises a first capacitor (C7) and a second capacitor (C8) which are connected between two output ends (c and d) of the rectifying circuit, wherein the connecting points thereof are connected with one input end (b) of the two input ends of the rectifying circuit, and the two output ends (c and d) are used for being connected with a load (R); the additional adjusting circuit is used for further adjusting the second direct current signal so as to generate a direct current electric signal (VDC); and an additional filter circuit comprises a third capacitor (C1) which is coupled with at least one capacitor in the first capacitor and the second capacitor which are connected with each other in series. The electric signal conversion circuit has easy implementation and low cost, and can improve harmonic wave.
Description
Technical field
The utility model relates to a kind of electrical signal conversion circuit, relates in particular to the electrical signal conversion circuit that is used for the AC-DC ballast.
Background technology
In ballast, for the electric device load that allows the rear end link to each other is applicable to the different input electric power of high voltage and low-voltage, boost function is the critical function of a needs realization.At present typical electronic formula rectification boosting circuit as shown in Figure 1, wherein, the ac signal V of input
ACCarry out rectification by a full bridge rectifier of forming by diode D1, D2, D3 and D4, and by charge and discharge the ripple that rectification produces main frequency is carried out filtering, produce comparatively level and smooth dc signal by capacitor C 1 and C2.As ac signal V
ACVoltage effective value when being 220V, switch S 1 disconnects, the capacitor C 1 of series connection is carried out filtering with the rectified signal that C2 exports rectification circuit, under no-load condition, produce comparatively level and smooth, voltage dc signal, use for late-class circuits such as the DC-AC inverter of back level, electric light drive circuits near ac signal peak value 311V.As ac signal V
ACVoltage effective value when being 110V, switch S 1 closure, positive half cycle at ac signal, diode D1 and D4 conducting, capacitor C 1 is charged to the peak value 155.5V of alternating voltage, at negative half period, diode D2 and D3 conducting, capacitor C 2 is charged to the peak value 155.5V of alternating voltage, therefore C1 and C2 carry out filtering to the direct current signal of rectification circuit output respectively, and generating a signal component respectively, these two signal components output voltage that superposes when zero load is the dc signal of AC signal crest voltage twice 311V, for the DC/AC inverter, late-class circuits such as electric light drive circuit use.As seen, this electronic type rectification boosting circuit can output voltage be one times or the dc signal of twice of ac signal voltage peak.When the voltage of the dc signal of needs output is in a times of input AC electrical signal peak voltage between twice the time, this circuit can pass through the closed and disconnected of control switch S1 in a period of time, and the back grade Filtering Processing of carrying out, the satisfactory dc signal of output voltage.
But, be used to realize that the switching circuit of switch S 1 is an electronic circuit that is difficult to realize, and it is very complicated especially to adjust its switching frequency.And existing booster circuit based on IC has a lot of peripheral devices, and price is not striking.
The utility model content
As seen, propose a kind of simple in structurely, realize that lower-cost electronic type boost rectifier is very necessary easily.
With regard to above at least one technical need, according to embodiment of the present utility model, provide a kind of electrical signal conversion circuit, be used for an ac signal (V
AC) be converted to a dc signal (V
DC), this electrical signal conversion circuit comprises: a rectification circuit is used for described ac signal (V
AC) rectification is one first direct current signal, has two inputs (a and b) and two outputs (c and d); A filter circuit is used for described first direct current signal is carried out filtering, generates one second direct current signal; Wherein, this filter circuit comprises first electric capacity (C7) and second electric capacity (C8), this first electric capacity (C7) and second electric capacity (C8) are connected between described two outputs (c and d), tie point between this first electric capacity (C7) and second electric capacity (C8) links to each other with the input (b) in described two inputs, and described two outputs (c and d) are used for linking to each other with load (R); The additional circuit of adjusting is used for described second direct current signal is further adjusted, to generate described dc signal (V
DC); Should comprise one the 3rd electric capacity (C1) by additional filter circuit, the 3rd electric capacity (C1) is coupled with at least one electric capacity in described first electric capacity (C7) of connecting and second electric capacity (C8).
Preferably, described first electric capacity (C7) is used for respectively described first direct current signal being carried out filtering and generating a signal component with second electric capacity (C8), and these two signal components are superposed to described second direct current signal.Between described two outputs of described the 3rd electric capacity (C1) cross-over connection (c and d), be used for described second direct current signal is carried out filtering to adjust the voltage of described second direct current signal, be in described ac signal peak value with the formation voltage effective value one times to the described dc signal between the twice.
Correspondingly,, also provide the ballast that comprises above electrical signal conversion circuit according to embodiment of the present utility model, and the fluorescent lamp that comprises this ballast.
In the electrical signal conversion circuit that embodiment of the present utility model provided, do not need switching circuit, simple in structure, realize easily, and cost is quite cheap.In addition, the utlity model has the characteristic of improving harmonic wave, can reduce harmonic wave to a certain extent.When preferably being applicable to fluorescent lamp, when the output impedance variation, provide higher output voltage in good time, when fluorescent lamp is unaged, fluorescent tube can be lighted fast; After fluorescent lamp is aging, can at short notice drive circuit be burnt, reduce the security risk that the aging back of electricity-saving lamp persistent fever causes.
Above and other advantage of the present utility model, characteristic are partly set forth embodiment hereinafter clearly.
Description of drawings
Read following detailed description by the reference accompanying drawing, can more easily understand feature of the present utility model, purpose and advantage non-limiting example.Wherein, same or analogous Reference numeral is represented same or analogous parts and part.
Fig. 1 is the circuit diagram of existing electronic type boost rectifying circuit;
Fig. 2 is the embodiment according to an aspect of the utility model, the circuit diagram of electrical signal conversion circuit;
Fig. 3 is the embodiment according to an aspect of the utility model, the workflow diagram of electrical signal conversion circuit;
Fig. 4 is the embodiment according to an aspect of the utility model, the output signal curve of electrical signal conversion circuit;
Fig. 5 is another embodiment according to an aspect of the utility model, the output signal curve of electrical signal conversion circuit;
Fig. 6 is the embodiment according to an aspect of the utility model, has the circuit diagram of the ballast of inductance;
Fig. 7 is the embodiment according to an aspect of the utility model, has the output signal curve of the ballast of inductance;
Fig. 8 is the embodiment according to another aspect of the utility model, the circuit diagram of electrical signal conversion circuit.
Embodiment
First embodiment
With reference to figure 2, show electrical signal conversion circuit according to the embodiment of an aspect of the present utility model.This circuit comprises: rectification circuit, the filter circuit of being made up of first capacitor C 7 and second capacitor C 8 of two series connection and the additional filter circuit of being made up of one the 3rd capacitor C 1.Wherein, rectification circuit comprises: the full-bridge type rectification circuit of being made up of four diode D1, D2, D3 and D4.Be appreciated that other rectification circuit, for example the rectification module of integrated form is equally applicable to the utility model.Rectification circuit is used for ac signal V
ACRectification is one first direct current signal, comprises two input a and b and two output c and d; First capacitor C 7 of two series connection and second capacitor C 8 are connected between two the output c and d of rectification circuit 11, tie point between two electric capacity links to each other with an input b of rectification circuit, these two electric capacity are used for first direct current signal is carried out filtering, generate one second direct current signal; The 3rd capacitor C 1 is connected across between two the output c and d of rectification circuit, is used for second direct current signal is carried out further filtering, to generate dc signal V
DCWherein, diode D1, D2, D3 and D4 can be general-purpose diodes; First capacitor C 7 and second capacitor C 8 can be thin-film capacitors; Capacitor C 1 can be an electrochemical capacitor, also can be other electric capacity.Load R is connected across between two the output c and d of rectification circuit, is subjected to dc signal V
DCDrive.
Fig. 3 shows the workflow diagram of this electrical signal conversion circuit.After circuit was in stable state, first capacitor C 7 of rectification circuit and two series connection and the operation principle of second capacitor C 8 and the electronic type rectification boosting circuit among Fig. 1 were similar.In step S10, rectification circuit is to ac signal V
ACCarry out rectification to generate first direct current signal.In step S12, first capacitor C 7 and second capacitor C 8 are carried out filtering to this first direct current signal respectively, and generate a signal component.The voltage effective value of this signal component and ac signal V
ACVoltage peak equate that these two signal components are superposed to second direct current signal, thereby the voltage effective value of second direct current signal is about ac signal V
ACThe twice of voltage peak.
Then, in step S14, the 3rd content C1 carries out further filtering to second direct current signal, to generate dc signal V
DCAccording to the magnitude relationship of the capacitance of the 3rd capacitor C 1 and first capacitor C 7 and second capacitor C 8,1 pair second direct current signal of the 3rd capacitor C carries out the filtering of following several situations:
The capacitance of the 3rd capacitor C 1 much smaller than with the capacitance of first capacitor C 7 and second capacitor C 8, for example the capacitance of C1 be C7 and C8 capacitance 1/10th and below, as C1 is nanofarad (nF) level or littler level, the capacitance of first capacitor C 7 and second capacitor C 8 is microfarad (μ F) level or bigger level, it is very little that the capacitance-resistance of load R and capacitor C 1 discharges and recharges constant, the filtering of second direct current signal that provides of 1 pair first capacitor C 7 of the 3rd capacitor C and second capacitor C 8 can be ignored, so the 3rd capacitor C 1 is adjusted the signal that second direct current signal is generated, i.e. the dc signal V of this electrical signal conversion circuit output
DCThe voltage effective value size be about ac signal V
ACThe twice of peak value.
2. the capacitance of the capacitance of capacitor C 1 and first capacitor C 7 and second capacitor C 8 has comparativity, for example is the same order of magnitude.Although the voltage effective value of second direct current signal is ac signal V
ACThe twice of peak value, it is bigger that but the capacitance-resistance of load R and capacitor C 1 discharges and recharges constant, second direct current signal that provides of 1 pair first capacitor C 7 of the 3rd capacitor C and second capacitor C 8 carries out certain filtering, so the 3rd capacitor C 1 is adjusted the signal that second direct current signal is generated, i.e. the dc signal V of this electrical signal conversion circuit output
DCVoltage effective value be in ac signal V
ACThe twice of crest voltage and one times between.A kind of principle of this phenomenon is: the rear end adds after the C1, the reactance of late-class circuit diminishes, the electric current that first capacitor C 7 when causing work and second capacitor C 8 provide increases, and first capacitor C 7 and 8 discharges of second capacitor C are very fast, so the voltage that the electrical signal conversion circuit provides drops to ac signal V
ACThe twice of crest voltage and one times between.
3. the capacitance of capacitor C 1 is much larger than the capacitance of first capacitor C 7 and second capacitor C 8, for example the capacitance of C1 be C7 and C8 ten times of capacitance and more than, as C1 is microfarad (μ F) level or bigger level, and the capacitance of first capacitor C 7 and second capacitor C 8 is nanofarad (nF) level or littler level.The capacitance-resistance of load R and capacitor C 1 discharges and recharges that constant is very big, and second direct current signal that provides of 1 pair first capacitor C 7 of the 3rd capacitor C and second capacitor C 8 carries out filtering, the dc signal V of this electrical signal conversion circuit output
DCVoltage effective value approximate ac signal V
ACCrest voltage.A kind of principle of this phenomenon is: the rear end adds after the C1, the reactance of late-class circuit becomes very little, the electrorheological that first capacitor C 7 when causing work and second capacitor C 8 provide gets very big, first capacitor C 7 and 8 discharges of second capacitor C are very fast, because the capacitance of first capacitor C 7 and second capacitor C 8 itself is very little, so the voltage that the electrical signal conversion circuit provides drops to ac signal V
ACCrest voltage.
Comprehensive above three aspects, because the continuity of Analogical Electronics, when the ratio of the capacitance of the capacitance of capacitor C 1 and first capacitor C 7 and second capacitor C 8 between 1/10th (little a lot) and ten times (big a lot), the dc signal V that the electrical signal conversion circuit is exported
DCVoltage effective value can be ac signal V
ACArbitrary value between the twice of peak value and one times.
More than several situations all describe with the condition of electrical signal conversion circuit load.Present embodiment uses simulation software, and during with the different value of C8, the electrical signal conversion circuit has carried out emulation in the output of 3000 Ω load conditions, the ac signal V of input to capacitor C 1, C7
ACSinusoidal signal for peak value 308V, frequency 50Hz.The capacity that Fig. 4 shows capacitor C 1 is 3.3 μ F, when the capacity of first capacitor C 7 and second capacitor C 8 is 3.3 μ F, and the dc signal V of electrical signal conversion circuit output
DCCurve, this dc signal V
DCThe about 330V of voltage peak, the about 250V of valley, effective value is about 290V, approximates the ac signal crest voltage of input.The capacity that Fig. 5 shows capacitor C 1 is 3.3 μ F, when the capacity of first capacitor C 7 and second capacitor C 8 is 6.8 μ F, and the dc signal V of electrical signal conversion circuit output
DCCurve, this dc signal V
DCThe about 435V of voltage peak, the about 325V of valley, effective value is about 380V, is 1.2 times of ac signal crest voltage of input.
Below will capacitance how to determine capacitor C 7, C8 and C1 be described.Export the dc signal V of a given voltage needing the electrical signal conversion circuit
DCUnder the situation with the device that drives certain wattage, engage given input AC signal of telecommunication V
ACVoltage, can determine the ratio of crest voltage of the ac signal of the voltage effective value of dc signal of electrical signal conversion circuit output and input, this voltage ratio should be between 1 to 2.Then, need determine the ratio of the capacitance of capacitor C 1 and first capacitor C 7 and second capacitor C 8 according to this voltage ratio, this determines that work can be easily be carried out Computer Simulation and be finished by experiment or SPICE (Simulation Program with Integrated CircuitEmphasis) software.In general, the capacitance of first capacitor C 7 and second capacitor C 8 equates.Concrete solution procedure is as follows:
At first, according to the power P of late-class circuit with wish the dc voltage value V that obtains
DC, according to
Obtain back-end circuit roughly equiv resistance R;
Then, get the ratio x of the capacitance of the 3rd capacitor C 1 of a plurality of (for example 4 and more than) and first capacitor C 7 and second capacitor C 8 at random, the ratio x that obtains a plurality of capacitances based on experiment or SPICE emulation is the response V of corresponding electrical signal conversion circuit respectively
Dc
Then, use instruments such as mini-tab, use for example 3 rank functions, simulate response V
DcCapacitance x with the 3rd capacitor C 1 and first capacitor C 7 and second capacitor C 8 is the n rank fitting formula f (x) of function;
Then, according to fitting formula f (x) with wish the dc voltage value V obtain
DC, try to achieve the ratio X of the capacitance of the 3rd capacitor C 1 and first capacitor C 7 and second capacitor C 8;
At last, working load is the side circuit of equivalent resistance R or the artificial circuit of SPICE emulation tool, and the ratio X that obtains is verified.Wherein, for nonlinear load, verify better with side circuit; For linear load, just should be able to reach the effect of checking with emulation tool.
Concrete, the response of at first measuring side circuit or artificial circuit, and will respond and the V that wishes to obtain
DCRelatively.If both conform to, so just can determine this ratio X, and determine the capacitance of capacitor C 7, C8 and C1.
When driving nonlinear load, following situation may take place: verify the response V that obtains according to this ratio X
DcThe value V that obtains with hope
DCDiffer bigger.At this moment, can and verify the V that obtains according to this ratio X
Dc, in conjunction with a plurality of ratio x that use before and response V
Dc, match high-order formula once more.And according to new high-order formula, the dc voltage value V that obtains based on hope
DC, find the solution the ratio X of a capacitance once more, and verify, until determining to produce response V
DcThe ratio X of capacitance.
The electrical signal conversion circuit that more than provides can be used as a kind of ballast and uses, and alternating current is converted to direct current.
On the basis of this ballast, the utility model also provides a kind of ballast, and this ballast comprises an electromagnetic type ballast module as shown in Figure 6, for example inductance coil L that inductance value is 1.1H, and aforesaid electrical signal conversion circuit.Wherein, an input a of rectification circuit links to each other ac signal V with the output of inductance L
ACFrom another input b of rectification circuit and the input input of inductance L.In this ballast, because the ballast effect of coil L, the capacitance of first capacitor C 7 and second capacitor C 8 can not have the ballast of coil to dwindle about 10 times in the electrical signal conversion circuit.
Present embodiment uses simulation software, capacity to capacitor C 1 is 3.3 μ F, the capacity of first capacitor C 7 and second capacitor C 8 is 330nF, and the electrical signal conversion circuit has carried out emulation in the output of 3000 Ω load conditions, and the ac signal of input is the sinusoidal signal of peak value 308V, frequency 50Hz.Fig. 7 illustrates the dc signal V of electrical signal conversion circuit output
DCCurve, this dc signal V
DCThe about 320V of peak value, the about 235V of valley, effective value is about 275V.
Except the voltage effective value of the dc signal of the output that can make the electrical signal conversion circuit for a times of the voltage peak of the ac signal of input to the arbitrary value between the twice, present embodiment also has a technique effect that does not reckon with in advance: have the characteristic of improving harmonic wave, can reduce harmonic wave to a certain extent.Concrete, in the 32wKyoto system, be equipped with in the circuit of rectifier of EM inductance at front end, two electric capacity (electrolysis 3.3uF) of 330nF can be under the situation of no any PFC, triple-frequency harmonics is dropped to 25 from 30, because standard is that triple-frequency harmonics is less than 30*pf, so this circuit can play a key effect in the application under the situation of front end outfit EM rectifier.
Second embodiment
More than be that example is described the utility model with the 3rd capacitor C 1 for first capacitor C 7 and second capacitor C, 8 two ends that are connected across series connection.The coupled modes that are appreciated that this capacitor C 1 and first capacitor C 7 and second capacitor C 8 are not limited to this, and the 3rd capacitor C 1 can otherwise be coupled with first capacitor C 7 and/or second capacitor C 8, and second direct current signal is carried out filtering.For example, shown in Figure 8 according to the embodiment of the utility model aspect another in, the capacitance of first capacitor C 7 and second capacitor C 8 equates that it is 10 μ F levels in the present embodiment.After circuit was in stable state, rectification circuit was to ac signal V
ACCarry out rectification to generate first direct current signal, two capacitor C 7 are carried out filtering to first direct current signal respectively and are generated a signal component with C8, and these two signal components are superposed to second direct current signal.The 3rd capacitor C 1 and first capacitor C 7 are connected between the output c and the tie point b between first capacitor C 7 and second capacitor C 8 of rectification circuit, to adjust the voltage of the signal component that first capacitor C 7 provides.The 3rd capacitor C 1 signal component that the signal component that produces and second capacitor C 8 produce of connecting with first capacitor C 7 is superposed to dc signal V
DCAccording to the capacitance of the 3rd capacitor C 1 and first capacitor C 7, in the following several ways:
The capacitance of the 3rd capacitor C 1 only is the nF level for example much smaller than the capacitance of first capacitor C 7, and the capacitance of the series connection of C1 and C7 is minimum.Insert after the load R, it is very little that the capacitance-resistance of the C1 of series connection and C7 and load R discharges and recharges time constant, and the electric weight of C1 and C7 is very fast discharge off, so that the voltage of the signal component that the series connection of C1 and C7 provides approximates is zero; The voltage that 8 pairs first direct current signals of second capacitor C carry out the signal component of filtering and generation equates with the crest voltage of the ac signal of input.So dc signal V of electrical signal conversion circuit c and the output of d two ends
DCVoltage effective value for the input ac signal V
ACA times of crest voltage.
When the capacitance of the 3rd capacitor C 1 and the capacitance of C7 were similar, the capacitance of the series connection of C1 and C7 was less.Insert after the load R, it is less that the capacitance-resistance of the C1 of series connection and C7 and load R discharges and recharges time constant, and C1 and C7 corona discharge are very fast, so the voltage of the signal component that the series connection of C1 and C7 provides is less than the crest voltage of the ac signal of input; The voltage of the signal component that second capacitor C 8 provides equates with the crest voltage of the ac signal of input.So dc signal V of electrical signal conversion circuit c and the output of d two ends
DCVoltage effective value be in the ac signal V of input
ACOne times of crest voltage and twice between;
The capacitance of the 3rd capacitor C 1 is much larger than the capacitance of C7, for example be its more than ten times, the capacitance of the series connection of C1 and C7 approximates C7.Insert after the load R, the C1 of series connection and C7 and the capacitance-resistance of load R discharge and recharge time constant and discharge and recharge time constant with C8 with the capacitance-resistance of load R and equate.The voltage of the signal component that the series connection of C1 and C7 provides approximates the ac signal V of input
ACCrest voltage; 8 pairs first direct current signals of second capacitor C carry out filtering and the voltage of the signal component that generates and the ac signal V of input
ACCrest voltage equate.So dc signal V of electrical signal conversion circuit c and the output of d two ends
DCVoltage be about the ac signal V of input
ACThe twice of crest voltage.
Thereby, according to the ratio of the capacitance of first capacitor C 7 of the capacitance series connection with it of the 3rd capacitor C 1, the dc signal V that the electrical signal conversion circuit provides
DCVoltage be in ac signal V
ACA times of crest voltage between the twice.
The method of describing among the method for the capacitance of concrete definite capacitor C 7, C8 and C1 and aforementioned first embodiment is similar, does not do at this and gives unnecessary details.
After this electrical signal conversion circuit, preferably can also add devices such as filter, carry out smooth to the waveform of the dc signal of c, d two ends output.
Similar with the embodiment of previous aspect, the electrical signal conversion circuit that example shown in Figure 8 ground is described can be used as a kind of ballast and uses, and alternating current is converted to direct current.In this ballast, can also comprise a for example electromagnetic type ballast module of inductance before the electrical signal conversion circuit.The embodiment that the specific implementation of this ballast can be described with reference to figure 6 does not do at this and to give unnecessary details.
More than go for a lot of occasions as Fig. 2, Fig. 6 or ballast shown in Figure 8, for example for fluorescent lamp provides drive signal, can provide higher output voltage.When fluorescent lamp was unaged, this ballast can be lighted fluorescent tube fast; After fluorescent lamp was aging, ballast can burn drive circuit at short notice, saved the energy consumption after lamp wears out.The circuit structure that comprises the fluorescent lamp of ballast is that one of ordinary skill in the art is known, and this specification is not done at this and given unnecessary details.
Although sets forth in detail and described the utility model in accompanying drawing and aforesaid description should think that this is illustrated and describes is illustrative and exemplary, rather than restrictive; The utility model is not limited to above-mentioned execution mode.
The those skilled in the art in those present technique fields can be by research specification, disclosed content and accompanying drawing and appending claims, and understanding and enforcement are to other changes of the execution mode of disclosure.In the claims, word " comprises " element and the step of not getting rid of other, and wording " one " is not got rid of plural number.In practical application of the present utility model, the function of a plurality of technical characterictics of being quoted during a part possibility enforcement of rights requires.
Claims (10)
1. an electrical signal conversion circuit is used for an ac signal (V
AC) be converted to a dc signal (V
DC), this electrical signal conversion circuit comprises:
-one rectification circuit is used for described ac signal (V
AC) rectification is one first direct current signal, has two inputs (a and b) and two outputs (c and d);
-one filter circuit is used for described first direct current signal is carried out filtering, generates one second direct current signal; Wherein, this filter circuit comprises first electric capacity (C7) and second electric capacity (C8), this first electric capacity (C7) and second electric capacity (C8) are connected between described two outputs (c and d), tie point between this first electric capacity (C7) and second electric capacity (C8) links to each other with the input (b) in described two inputs, and described two outputs (c and d) are used for linking to each other with load (R);
-one additional circuit of adjusting is used for described second direct current signal is further adjusted, to generate described dc signal (V
DC); Should comprise one the 3rd electric capacity (C1) by additional filter circuit, the 3rd electric capacity (C1) is coupled with at least one electric capacity in described first electric capacity (C7) of connecting and second electric capacity (C8).
2. electrical signal conversion circuit according to claim 1, it is characterized in that, first electric capacity (C7) of described series connection is used for respectively described first direct current signal being carried out filtering and generating a signal component with second electric capacity (C8), these two signal components are superposed to described second direct current signal, described the 3rd electric capacity (C1) is connected across between described two outputs (c and d), be used for described second direct current signal is carried out filtering to adjust the voltage of described second direct current signal, to generate described dc signal (V
DC).
3. electrical signal conversion circuit according to claim 2, it is characterized in that, the capacitance of described the 3rd electric capacity (C1) is much larger than first electric capacity (C7) of described series connection and the capacitance of second electric capacity (C8), and it is described ac signal (V that this electrical signal conversion circuit is used to provide voltage effective value
AC) one times described dc signal (V of crest voltage
DC).
4. electrical signal conversion circuit according to claim 2, it is characterized in that, the capacitance of described the 3rd electric capacity (C1) is much smaller than first electric capacity (C7) of described series connection and the capacitance of second electric capacity (C8), and it is described ac signal (V that this electrical signal conversion circuit is used to provide voltage effective value
AC) the described dc signal (V of twice of crest voltage
DC).
5. electrical signal conversion circuit according to claim 2, it is characterized in that, according to the capacitance and the ratio of described first electric capacity (C7) of connecting with the capacitance of second electric capacity (C8) of described the 3rd electric capacity (C1), it is described ac signal (V that this electrical signal conversion circuit is used to provide voltage effective value
AC) one times of described dc signal (V of crest voltage to the arbitrary value between the twice
DC).
6. electrical signal conversion circuit according to claim 1, it is characterized in that, first electric capacity (C7) of described series connection is used for respectively described first direct current signal being carried out filtering and generating a signal component with second electric capacity (C8), these two signal components are superposed to described second direct current signal, described the 3rd electric capacity (C1) and described first electric capacity (C7) of connecting and a electric capacity (C7) in second electric capacity (C8) are connected between the output (c) and described first electric capacity (C7) and the tie point (b) between second electric capacity (C8) of connecting in described two outputs (c and d) of described rectification circuit, and are used to adjust the voltage of the described signal component that this electric capacity (C7) provides.
7. according to claim 2 or 6 described electrical signal conversion circuit, it is characterized in that described rectification circuit comprises the full-bridge type rectification circuit of being made up of at least four diodes (D1, D2, D3 and D4).
8. a ballast comprises electrical signal conversion circuit according to claim 2.
9. ballast according to claim 9 is characterized in that, this ballast also comprises:
-one inductance (L) links to each other with a input (a) in two inputs of described rectification circuit (a and b);
Described ac signal (V
AC) another input (b) and described inductance (L) from two inputs of described rectification circuit (a and b) import described ballast.
10. a fluorescent lamp comprises according to claim 9 or 10 described ballasts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200735888U CN201541207U (en) | 2009-06-08 | 2009-06-08 | Electric signal conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200735888U CN201541207U (en) | 2009-06-08 | 2009-06-08 | Electric signal conversion circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201541207U true CN201541207U (en) | 2010-08-04 |
Family
ID=42592658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200735888U Expired - Fee Related CN201541207U (en) | 2009-06-08 | 2009-06-08 | Electric signal conversion circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201541207U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453629A (en) * | 2016-04-29 | 2017-12-08 | 英飞凌科技奥地利有限公司 | Voltage multiplie for power converter |
-
2009
- 2009-06-08 CN CN2009200735888U patent/CN201541207U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107453629A (en) * | 2016-04-29 | 2017-12-08 | 英飞凌科技奥地利有限公司 | Voltage multiplie for power converter |
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