CN103973231A - Voltage adjustment circuit of amplification circuit and related adjustment method - Google Patents
Voltage adjustment circuit of amplification circuit and related adjustment method Download PDFInfo
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- CN103973231A CN103973231A CN201310038502.9A CN201310038502A CN103973231A CN 103973231 A CN103973231 A CN 103973231A CN 201310038502 A CN201310038502 A CN 201310038502A CN 103973231 A CN103973231 A CN 103973231A
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Abstract
The invention discloses the voltage adjustment circuit of an amplification circuit and a related adjustment method. The voltage adjustment circuit provided by the embodiment of the invention comprises a reference voltage generation circuit, a subtractor circuit, a threshold generation circuit and a comparison circuit, and is used for providing a power source signal for the amplification circuit to guarantee that the amplification circuit can provide an output signal for a load according to an input signal, wherein the subtractor circuit is used for generating a difference signal according to the output signal and the power source signal; the comparison circuit is used for setting the signal value of the power source adjustment signal of the reference voltage generation circuit according to the difference signal and a threshold signal generated by the threshold generation circuit; the voltage adjustment circuit can be used for adjusting a power source signal output to the amplification circuit according to the characteristics of the output signal. Therefore, the energy utilization efficiency of the amplification circuit can be improved and the distortion of the output signal can be avoided.
Description
Technical field
The relevant amplifying circuit of the present invention, espespecially a kind of voltage-regulating circuit of amplifying circuit and relevant method of adjustment.
Background technology
Due to the scarcity day by day of the energy, therefore the energy use efficiency of electronic product becomes more and more important.Especially the portable electronic product such as smart mobile phone or panel computer, is generally one of part that user takes notice of most its service time.If can improve the energy use efficiency of electronic product, also its service time can be extended effectively.The mode of improving the energy use efficiency of electronic product has a lot, and for example, amplifying circuit common from various electronic products is set about.
Amplifying circuit conventionally can be coupled to two fixing current potentials (for example, the current potential of feeder ear and earth terminal) and receive power supply signal, to produce accordingly the output signal of amplifying according to input signal.Because the signal value of input signal can present dynamic change, the signal value of output signal also can change accordingly, but not is positioned at a fixing interval.Therefore, exceed the signal value of power supply signal and produce distortion for fear of the signal value of output signal, signal value scope that generally can output signal is set between coupled current potential.
If the signal value scope of output signal is arranged to too small interval, the difference between output signal and power supply signal is too large, can reduce the energy use efficiency of amplifying circuit.But, if the signal value scope of output signal is arranged to larger interval, the difference between output signal and power supply signal is too little, in the time that the output signal of amplifying circuit produces more violent variation, output signal is easy to produce distortion, and causes the usefulness of system to be affected.
U.S. US7830209 Patent Case proposes a kind of signal value of the output signal according to amplifying circuit, and adjusts the apparatus and method of the power supply signal that is supplied to amplifying circuit.But, in the time that the resistance value of the load of amplifying circuit changes, or in the time that power supply signal is not accurate enough, still easily cause the problems such as the distortion of output signal or energy use efficiency be not good.
Summary of the invention
In view of this, how to promote the energy use efficiency of amplifying circuit in above-mentioned association area, and can maintain the correctness of output signal, in fact for industry has problem to be solved.
The invention provides a kind of embodiment of voltage-regulating circuit, in order to one first power supply signal and second source signal to amplifying circuit to be provided, make this amplifying circuit provide one to output signal to a load according to an input signal, this first power supply signal and this second source signal, this voltage-regulating circuit comprises: a generating circuit from reference voltage, in the time of first period, this first power supply signal is set to a first signal value, and is a secondary signal value by this second source signal setting; One subtraction circuit, couples this voltage generation circuit, in order to according to this first power supply signal and this second source signal at least one of them and produce a difference signal according to this output signal; One threshold value produces circuit, in order to produce a first threshold signal; And a comparison circuit, be coupled to this threshold value and produce circuit and this subtraction circuit, relatively this first threshold signal and this difference signal; Wherein, in the time that this difference signal is greater than this first threshold signal, this comparison circuit arranges this generating circuit from reference voltage in the time of second period, and this first power supply signal is set to one the 3rd signal value, and is one the 4th signal value by this second source signal setting; And the 3rd signal value is less than this first signal value, the 4th signal value is more than or equal to this secondary signal value.
The present invention separately provides a kind of embodiment of voltage adjusting method of amplifying circuit, in order to one first power supply signal and second source signal to amplifying circuit to be provided, make this amplifying circuit provide one to output signal to a load according to an input signal, this first power supply signal and this second source signal, this voltage adjusting method comprises: in the time of first period, use this first power supply signal of a generating circuit from reference voltage to be set to a first signal value, and be a secondary signal value by this second source signal setting; According to this first power supply signal and this second source signal at least one of them and according to this output signal, and use a subtraction circuit produce a difference signal; Use a threshold value to produce circuit and produce a first threshold signal; Use relatively this first threshold signal and this difference signal of a comparison circuit; And in the time that this difference signal is greater than this first threshold signal, this generating circuit from reference voltage being set in the time of second period, this first power supply signal is set to one the 3rd signal value, and is one the 4th signal value by this second source signal setting; Wherein the 3rd signal value is less than this first signal value, and the 4th signal value is more than or equal to this secondary signal value.
The present invention separately provides a kind of embodiment of voltage-regulating circuit, in order to one first power supply signal and second source signal to amplifying circuit to be provided, make this amplifying circuit provide one to output signal to a load according to an input signal, this first power supply signal and this second source signal, this voltage-regulating circuit comprises: a generating circuit from reference voltage, in the time of first period, this first power supply signal is set to a first signal value, and is a secondary signal value by this second source signal setting; One subtraction circuit, couples this voltage generation circuit, in order to according to this first power supply signal and this second source signal at least one of them and produce a difference signal according to this output signal; One threshold value produces circuit, in order to produce a first threshold signal; And a comparison circuit, be coupled to this threshold value and produce circuit and this subtraction circuit, relatively this first threshold signal and this difference signal; Wherein, in the time that this difference signal is greater than this first threshold signal, this comparison circuit arranges this generating circuit from reference voltage in the time of second period, and this first power supply signal is set to one the 3rd signal value, and is one the 4th signal value by this second source signal setting; And the 3rd signal value is less than or equal to this first signal value, the 4th signal value is greater than this secondary signal value.
One of advantage of above-described embodiment is that voltage-regulating circuit can suitably be adjusted according to the characteristic of output signal the power supply signal that exports amplifying circuit to, therefore can either promote the energy use efficiency of amplifying circuit, can also avoid output signal to produce distortion.Another advantage of above-described embodiment is that the adjustment that voltage-regulating circuit can also be suitable according to the characteristic of load exports the power supply signal of amplifying circuit to, and more can promote the energy use efficiency of amplifying circuit and avoid the distortion of output signal.Other advantages of the present invention will explain orally in more detail by the following description and accompanying drawing.
Brief description of the drawings
Accompanying drawing described herein is used to provide further understanding of the present application, forms the application's a part, and the application's schematic description and description is used for explaining the application, does not form the improper restriction to the application.
Fig. 1 is the functional block diagram after the audio signal output device of one embodiment of the invention is simplified.
Fig. 2 is the functional block diagram after an embodiment of the voltage-regulating circuit of Fig. 1 simplifies.
Sequential chart after one embodiment of multiple signals that the voltage-regulating circuit that Fig. 3 is Fig. 2 produces while running simplifies.
Sequential chart after another embodiment of multiple signals that the voltage-regulating circuit that Fig. 4 is Fig. 1 produces while running simplifies.
Fig. 5 is the functional block diagram after another embodiment of the voltage-regulating circuit of Fig. 1 simplifies.
Sequential chart after one embodiment of multiple signals that the voltage-regulating circuit that Fig. 6 is Fig. 5 produces while running simplifies.
Embodiment
Below will coordinate relevant drawings that embodiments of the invention are described.In the accompanying drawings, identical label represents same or similar element or process step.
Below will output in audio signal device 100 for example, illustrate how by the amplifying circuit 120 of design applied audio signal output device 100 of the present invention, to promote the energy use efficiency of audio signal output device 100.
Fig. 1 is the functional block diagram after the audio signal output device 100 of one embodiment of the invention is simplified, audio signal output device 100 includes amplifying circuit 120 and voltage-regulating circuit 140, and can provide output signal Vout to load 190 by impedance circuit 180.In order to make drawing concisely be easy to explanation, other elements and the annexation of audio signal output device 100 are not illustrated in Fig. 1.For example, in audio signal output device 100, be not illustrated in Fig. 1 in order to the circuit that produces input signal Vin.
Amplifying circuit 120 can use the circuit frameworks such as operational amplifier, instrument amplifier and transduction amplifier to implement.Amplifying circuit 120 includes positive supply input (positive power supply) 121 and negative supply input (negative power supply) 122, respectively in order to receive the first power supply signal Vdd and second source signal Vss, with according to input signal Vin, power supply signal Vdd and power supply signal Vss and produce accordingly output signal Vout.
In the present embodiment, the input signal Vin of amplifying circuit 120 and output signal Vout all represent so that explanation in the mode of single-ended signal (single ended signal).In other embodiments, input signal Vin and output signal Vout can use respectively and implement for the mode of single-ended signal or differential signal (differential signal).
Voltage-regulating circuit 140 can provide to the output signal Vout of load 190 according to audio signal output device 100, (for example export the power supply signal Vdd of amplifying circuit 120 and/or the signal value of power supply signal Vss to and adjust, magnitude of voltage or current value), to promote energy use efficiency, and can avoid the distortion of output signal Vout.
In the present embodiment, by the one or more circuit elements between audio signal output device 100 and load 190, illustrate impedance circuit 180 into Fig. 1 so that explanation.For example, impedance circuit 180 can include inductance, electric capacity and resistance etc. initiatively or passive circuit element, so that the functions such as filtering (filtering) or voltage stabilizing to be provided.In other embodiments, when do not need impedance circuit 180 to provide function time, impedance circuit 180 also can omit.In other embodiments, impedance circuit 180 also can be integrated in audio signal output device 100.
In the present embodiment, load 190 can be that the earphone that is coupled to audio signal output device 100, sound equipment or audio-visual group are put the devices such as device.In one embodiment, because user may more can change the equipment such as earphone or sound equipment, therefore, the resistance value of load 190 may change.
Fig. 2 be in Fig. 1 voltage-regulating circuit 140 one embodiment simplify after functional block diagram.In the embodiment of Fig. 2, voltage-regulating circuit 140 includes generating circuit from reference voltage 220, subtraction circuit 240, threshold value generation circuit 260 and comparison circuit 280.In order to make drawing concisely be easy to explanation, other elements and the annexation of voltage-regulating circuit 140 are not illustrated in Fig. 2.
Generating circuit from reference voltage 220 can use the circuit framework such as charge pump circuit (charge pump), band-gap circuit (bandgap circuit), current source circuit and voltage source circuit to implement, and power supply signal Vdd and Vss are set to one of them of one or more signal values respectively.For example, in one embodiment, power supply signal Vdd can be set to the signal values such as 5 volts, 4 volts and 2.5 volts, and power supply signal Vss can be set to the signal values such as 0 volt, 0.5 volt and 1.5 volts.In another embodiment, power supply signal Vdd can be set to the signal values such as 5 volts, 4 volts and 2.5 volts, and power supply signal Vss is only set to 0 volt.In another embodiment, power supply signal Vdd is only set to 5 volts, and power supply signal Vss can be set to the signal values such as 0 volt, 1 volt and 2 volts.
Subtraction circuit 240 is coupled to generating circuit from reference voltage 220 and load 190, and can according to power supply signal Vdd and Vss at least one of them and according to exporting the output signal Vout of load 190 to, and produce one or more difference signal dV.For example, subtraction circuit 240 can produce difference signal dV according to the lowest difference distance between power supply signal Vdd and output signal Vout, produce difference signal dV according to the lowest difference distance between power supply signal Vss and output signal Vout, produce difference signal dV according to the smaller of above-mentioned two lowest difference distances, or export above-mentioned both or three simultaneously and produce multiple difference signals.Subtraction circuit 240 can use the modes such as one or more comparison circuits, error amplifier, logical circuit, active member and/or passive device to implement, to produce difference signal dV.
Threshold value produces circuit 260 in order to produce one or more threshold signal Vth, and threshold value produces circuit 260 and can use the circuit frameworks such as charge pump circuit, band-gap circuit, current source circuit and voltage source circuit to implement.For example, threshold value produces circuit 260 and can use register to store required numerical value, and passes through D/A conversion circuit and produce required threshold signal Vth.
Comparison circuit 280 is coupled to threshold value and produces circuit 260 and subtraction circuit 240, in order to produce control signal Vc according to difference signal dV and threshold signal Vth, produces suitable power supply signal Vdd and Vss to control generating circuit from reference voltage 220.Comparison circuit 280 can use there is postiive gain, the circuit framework such as the comparison circuit of negative gain or tool gain implements, to export the control signal Vc of numeral and/or simulation value.
For example, in one embodiment, threshold value produces circuit 260 can produce first threshold signal Vth1 and Second Threshold signal Vth2.In the time that difference signal dV is greater than first threshold signal Vth1, represents that the difference signal dV between output signal Vout and power supply signal Vdd (or power supply signal Vss) is too large, and can cause the energy use efficiency of amplifying circuit 120 not good.Therefore, comparison circuit 280 can produce control signal Vc according to difference signal dV and first threshold signal Vth1, so that being set, generating circuit from reference voltage 220 reduces the signal value of power supply signal Vdd and/or the signal value of rising power supply signal Vss, and use lower power supply signal Vdd and/or higher power supply signal Vss to produce output signal Vout, to promote energy use efficiency.
In the time that difference signal dV is less than Second Threshold signal Vth2, represent that the difference signal dV between output signal Vout and power supply signal Vdd (or power supply signal Vss) is too little, and the output signal Vout that can cause amplifying circuit 120 to export load 190 to easily produces distortion.Therefore, comparison circuit 280 can produce control signal Vc according to difference signal dV and Second Threshold signal Vth2, the signal value that improves the signal value of power supply signal Vdd and/or reduce power supply signal Vss so that generating circuit from reference voltage 220 to be set, and use higher power supply signal Vdd and/or lower power supply signal Vss to produce output signal Vout, produce the situation of distortion to improve output signal Vout.
In addition, in the above-described embodiments, first threshold signal Vth1 and Second Threshold signal Vth2 can consider according to different design, and be set to identical or not identical numerical value.
Sequential chart after one embodiment of multiple signals that the voltage-regulating circuit 140 that Fig. 3 is Fig. 2 produces while running simplifies.The function mode of middle voltage-regulating circuit 140 will be further illustrated with Fig. 1 to Fig. 3 below.
In the time that audio signal output device 100 operates, in the time providing signal value to the output signal Vout of load 190 higher, amplifying circuit 120 need to be exported energy to load 190 by power supply signal Vdd, and the signal value of power supply signal Vdd is reduced.In the time providing signal value to the output signal Vout of load 190 lower, amplifying circuit 120 need to draw energy to load 190 by power supply signal Vss, and the signal value of power supply signal Vss is raise.
In the period of Fig. 3 T1, the signal value of generating circuit from reference voltage 220 power supply signal Vdd is set to first signal value V1, and the signal value of power supply signal Vss is set to secondary signal value V2.Subtraction circuit 240 can be according to the lowest difference distance of power supply signal Vdd and output signal Vout, and according to the lowest difference distance of power supply signal Vss and output signal Vout, and produce respectively the difference signal dV that numerical value is d1, d2, d3 and d4.
In the time that the numerical value of difference signal dV is d3, difference signal dV is greater than threshold value and produces the first threshold signal Vth1 that circuit 260 produces, represent that now the difference signal dV between output signal Vout and power supply signal Vdd is too large, the energy use efficiency of amplifying circuit 120 is not good.
Therefore, in the time of period T2, the signal value of generating circuit from reference voltage 220 meeting power supply signal Vdd is set to the 3rd signal value V3, and the signal value of power supply signal Vss is set to the 4th signal value V4, making numerical value in period T2 is that the difference signal dV of d5, d6 and d7 is all less than first threshold signal Vth1.In addition, the 3rd signal value V3 is less than first signal value V1, the 4th signal value V4 is greater than secondary signal value V2, and voltage-regulating circuit 140 can produce output signal Vout with lower power supply signal Vdd and higher power supply signal Vss, and can promote the energy use efficiency of amplifying circuit 120.
Sequential chart after another embodiment of multiple signals that the voltage-regulating circuit 140 that Fig. 4 is Fig. 2 produces while running simplifies.The function mode of middle voltage-regulating circuit 140 will be further illustrated with Fig. 1, Fig. 2 and Fig. 4 below.
In the period of Fig. 4 S1, the signal value of generating circuit from reference voltage 220 power supply signal Vdd is set to first signal value V1, and the signal value of power supply signal Vss is set to secondary signal value V2.Subtraction circuit 240 can be according to the lowest difference distance of power supply signal Vdd and output signal Vout, and according to the lowest difference distance of power supply signal Vss and output signal Vout, and produces the difference signal dV of b1, b2 and b3.
In the time that the numerical value of difference signal dV is b3, difference signal dV is less than threshold value and produces the Second Threshold signal Vth2 that circuit 260 produces, represent that now the difference signal dV between output signal Vout and power supply signal Vdd is too little, the output signal Vout that amplifying circuit 120 exports load 190 to easily produces distortion.
Therefore, in the time of period S2, generating circuit from reference voltage 220 can power supply signal Vdd signal value be set to the 5th signal value V5, and the signal value of power supply signal Vss is set to the 6th signal value V6, making numerical value in period T2 is that the difference signal dV of b4 and d5 is all greater than Second Threshold signal Vth2.In addition, the 5th signal value V5 is greater than first signal value V1, the 6th signal value V6 is less than secondary signal value V2, and voltage-regulating circuit 140 can produce output signal Vout with higher power supply signal Vdd and lower power supply signal Vss, easily produces the situation of distortion and can reduce output signal Vout.
Fig. 5 is the functional block diagram after another embodiment of voltage-regulating circuit 140 in Fig. 1 simplifies, the sequential chart after another embodiment of multiple signals that the voltage-regulating circuit 140 that Fig. 6 is Fig. 5 produces while running simplifies.In the embodiment of Fig. 5, except generating circuit from reference voltage 220, subtraction circuit 240 and the comparison circuit 280 of Fig. 2, the voltage-regulating circuit 140 of Fig. 5 also includes load circuit for detecting 520, counting circuit 540 and threshold value and produces circuit 560.In order to make drawing concisely be easy to explanation, other elements and the annexation of voltage-regulating circuit 140 are not illustrated in Fig. 5.In the embodiment of Fig. 5, generating circuit from reference voltage 220, subtraction circuit 240 and comparison circuit 280 can use the same or similar execution mode of embodiment with Fig. 2, and therefore the function mode of these function squares and execution mode can no longer repeat with reference to above paragraph.
Load circuit for detecting 520 can use the frameworks such as the signal processing circuit of various analog or digitals to implement, to detect the resistance value of load 190.For example, load circuit for detecting 520 can use current source circuit load 190 to be transmitted to the AC signal of different frequency, with the resistance value of computational load 190.In addition, threshold value produces circuit 540 and is coupled to load circuit for detecting 520, and can be according to the setting of load circuit for detecting 520, the threshold signal being produced to adjust.
In the time that audio signal output device 100 operates, in the time providing signal value to the output signal Vout of load 190 higher, amplifying circuit 120 need to be exported energy to load 190 by power supply signal Vdd, and the signal value of power supply signal Vdd is reduced.In the time providing signal value to the output signal Vout of load 190 lower, amplifying circuit 120 need to draw energy to load 190 by power supply signal Vss, and the signal value of power supply signal Vss is raise.
When the resistance value of load 190 hour, the amplitude that the signal value of power supply signal Vdd reduces is larger, the amplitude that the signal value of power supply signal Vss raises is also larger.The resistance value that represents load 190 as the curve 610 and 630 of Fig. 6 hour, an embodiment of the signal value of power supply signal Vdd and Vss.
In the time that the resistance value of load 190 is larger, the amplitude that the signal value of power supply signal Vdd reduces is less, and the amplitude that the signal value of power supply signal Vss raises is also less.While representing that as the curve 620 and 640 of Fig. 6 the resistance value of load 190 is larger, an embodiment of the signal value of power supply signal Vdd and Vss.
Voltage-regulating circuit 140 can be detected by load circuit for detecting 320 resistance value of load 190, produces circuit 560 its one or more threshold signals that produce of adjustment and threshold value is set accordingly.For example, in the time that the resistance value of load 190 is less than the first default resistance value, load circuit for detecting 520 can produce circuit 560 by threshold value and be set to export first threshold signal Vth1 and Second Threshold signal Vth2.And in the time that the resistance value of load 190 is greater than the first default resistance value, load circuit for detecting 520 can produce circuit 560 by threshold value and be set to export the 3rd threshold signal Vth3 and the 4th threshold signal Vth4, the 3rd threshold signal Vth3 is less than first threshold signal Vth1, and the 4th threshold signal Vth4 is less than Second Threshold signal Vth2.In addition, in another embodiment, in the time that the resistance value of load 190 is less than than lower the second default resistance value of the first default resistance value, load circuit for detecting 520 can produce circuit 560 by threshold value and be set to export the 5th threshold signal Vth5 and the 6th threshold signal Vth6, the 5th threshold signal Vth5 is greater than first threshold signal Vth1, and the 6th threshold signal Vth6 is greater than Second Threshold signal Vth2.
When the resistance value of load 190 is less, the amplitude of power supply signal Vdd and Vss variation is larger, and output signal Vout is easier to exceed the signal value of power supply signal Vdd and Vss and produces distortion.Therefore, load circuit for detecting 320 can arrange threshold value and produce circuit 560 and increase one or more threshold signals of its generation, avoids output signal Vout to produce the situation of distortion to promote.
Therefore, when the resistance value of load 190 is larger, the amplitude of power supply signal Vdd and Vss variation is less, and output signal Vout produces distortion compared with being not easy to exceed the signal value of power supply signal Vdd and Vss.Therefore, load circuit for detecting 320 can arrange threshold value and produce circuit 560 and downgrade one or more threshold signals of its generation, to promote the energy use efficiency of amplifying circuit 120.
In the embodiment of Fig. 5, the cumulative number that counting circuit 540 can be greater than threshold signal and/or be less than threshold signal in order to calculated difference signal dV (for example, cumulative number in one section of Preset Time), the power supply signal Vdd and the Vss that are produced to adjust generating circuit from reference voltage 220.For example, when the cumulative number that is greater than first threshold signal Vth1 as difference signal dV is greater than default calculation times, the signal value that generating circuit from reference voltage 220 downgrades the signal value of power supply signal Vdd and/or increases power supply signal Vss is just set.In another embodiment, when the cumulative number that is less than Second Threshold signal Vth2 as difference signal dV is greater than default calculation times, just setting increases the signal value of power supply signal Vdd and/or downgrades the signal value of power supply signal Vss.
In the above-described embodiment, each functional module all can consider according to different design, and adopts one or more circuit elements to implement.For example, amplifying circuit 120 and voltage-regulating circuit 140 can be arranged at same integrated circuit (IC) chip, also can adopt respectively one or more integrated circuit components and/or discrete circuit element to implement.
In other embodiment, counting circuit 540 also can be arranged at the voltage-regulating circuit 140 of Fig. 2, adjusts the signal value of power supply signal Vdd and/or the signal value of power supply signal Vss and generating circuit from reference voltage 220 is set.In other embodiment, the voltage-regulating circuit 140 of Fig. 5 also can omit counting circuit 540 and relevant running, adjusts produced power supply signal Vdd and Vss and use comparison circuit 280 that generating circuit from reference voltage 220 is set.
In addition, in the above-described embodiments, voltage-regulating circuit 140 also can be set to only adjust the signal value of power supply signal Vdd, only adjust the signal value of power supply signal VSS or adjust the signal value of power supply signal Vdd and the signal value of power supply signal Vss simultaneously.
In the above-described embodiments, voltage-regulating circuit can suitably be adjusted according to the characteristic of output signal the power supply signal that exports amplifying circuit to, therefore can either promote the energy use efficiency of amplifying circuit, can also avoid output signal to produce distortion.In addition, voltage-regulating circuit can also, by the mode such as resistance value and usage count circuit of detecting load, export the power supply signal of amplifying circuit to and adjust accordingly, and more can promote the energy use efficiency of amplifying circuit and avoid the distortion of output signal.
In the above-described embodiments, voltage-regulating circuit can be according to the actual gap between output signal and power supply signal, and generating circuit from reference voltage is set adjusts the signal value of power supply signal.Therefore,, in the time that the resistance value of load changes or when power supply signal is not accurate enough, still can avoid output signal generation distortion and improve the energy use efficiency of amplifying circuit.
In specification and claim, use some vocabulary to censure specific element.But person of ordinary skill in the field should understand, same element may be called with different nouns.Specification and claim be not using the difference of title as the mode of distinguishing element, but the difference in function is used as the benchmark of distinguishing with element.Be open term at specification and claim mentioned " comprising ", therefore should be construed to " comprise but be not limited to ".In addition, " couple " at this and comprise directly any and indirectly connect means.Therefore, be coupled to the second element if describe the first element in literary composition, represent that the first element can directly be connected in the second element by the signal such as electric connection or wireless transmission, optical delivery connected mode, or by other elements or connection means indirectly electrically or signal be connected to this second element.
Used herein " and/or " describing mode, the combination in any that comprises one or more cited project.In addition, unless in specification, specialize, the term of any odd number lattice all comprises the connotation of plural lattice simultaneously.
The embodiment that the foregoing is only the application, is not limited to the application, and for a person skilled in the art, the application can have various modifications and variations.All within the application's spirit and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in the application's claim scope.
Claims (20)
1. a voltage-regulating circuit, it is characterized in that, in order to one first power supply signal and second source signal to amplifying circuit to be provided, make this amplifying circuit provide one to output signal to a load according to an input signal, this first power supply signal and this second source signal, this voltage-regulating circuit comprises:
One generating circuit from reference voltage, in the time of first period, this first power supply signal is set to a first signal value, and is a secondary signal value by this second source signal setting;
One subtraction circuit, couples this voltage generation circuit, in order to according to this first power supply signal and this second source signal at least one of them and produce a difference signal according to this output signal;
One threshold value produces circuit, in order to produce a first threshold signal; And
One comparison circuit, is coupled to this threshold value and produces circuit and this subtraction circuit, relatively this first threshold signal and this difference signal;
Wherein, in the time that this difference signal is greater than this first threshold signal, this comparison circuit arranges this generating circuit from reference voltage in the time of second period, and this first power supply signal is set to one the 3rd signal value, and is one the 4th signal value by this second source signal setting; And the 3rd signal value is less than this first signal value, the 4th signal value is more than or equal to this secondary signal value.
2. voltage-regulating circuit as claimed in claim 1, is characterized in that, separately comprises:
One counting circuit, is coupled to this comparison circuit and this generating circuit from reference voltage, is less than a cumulative number of this first threshold signal to calculate this difference signal;
Wherein, in the time that this cumulative number is greater than a default calculation times, this counting circuit arranges this generating circuit from reference voltage in the time of this second period, and this first power supply signal is set to the 3rd signal value, and is the 4th signal value by this second source signal setting.
3. voltage-regulating circuit as claimed in claim 1, is characterized in that, when this threshold value produces, circuit is another produces a Second Threshold signal, and relatively this Second Threshold signal and this difference signal of this comparison circuit; In the time that this difference signal is less than this Second Threshold signal, this comparison circuit arranges this generating circuit from reference voltage in the time of the 3rd period, and this first power supply signal is set to one the 5th signal value, and is one the 6th signal value by this second source signal setting; And the 5th signal value is greater than this first signal value, the 6th signal value is less than or equal to this secondary signal value.
4. voltage-regulating circuit as claimed in claim 1, is characterized in that, separately comprises:
One load circuit for detecting, is coupled to this threshold value and produces circuit, detects a resistance value of this load;
Wherein, in the time that this resistance value of this load is less than one first default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides this first threshold signal to this generating circuit from reference voltage; In the time that this resistance value of this load is greater than this first default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides one the 3rd threshold signal to this generating circuit from reference voltage, and the 3rd threshold signal is less than this first threshold signal.
5. voltage-regulating circuit as claimed in claim 4, is characterized in that, in the time that this resistance value of this load is less than one second default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides one the 5th threshold signal to this generating circuit from reference voltage; This first default resistance value is greater than this second default resistance value, and the 5th threshold signal is greater than this first threshold signal.
6. voltage-regulating circuit as claimed in claim 2, is characterized in that, separately comprises:
One load circuit for detecting, is coupled to this threshold value and produces circuit, detects a resistance value of this load;
Wherein, in the time that this resistance value of this load is less than one first default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides this first threshold signal to this generating circuit from reference voltage; In the time that this resistance value of this load is greater than this first default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides one the 3rd threshold signal to this generating circuit from reference voltage, and the 3rd threshold signal is less than this first threshold signal.
7. voltage-regulating circuit as claimed in claim 6, is characterized in that, in the time that this resistance value of this load is less than one second default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides one the 5th threshold signal to this generating circuit from reference voltage; This first default resistance value is greater than this second default resistance value, and the 5th threshold signal is greater than this first threshold signal.
8. voltage-regulating circuit as claimed in claim 6, is characterized in that, in the time that this resistance value of this load is less than this first default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides this Second Threshold signal to this generating circuit from reference voltage; In the time that this resistance value of this load is greater than this first default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides one the 4th threshold signal to this generating circuit from reference voltage, and the 4th threshold signal is less than this Second Threshold signal.
9. voltage-regulating circuit as claimed in claim 6, is characterized in that, in the time that this resistance value of this load is less than one second default resistance value, this load circuit for detecting arranges this threshold value generation circuit provides one the 6th threshold signal to this generating circuit from reference voltage; This first default resistance value is greater than this second default resistance value, and the 6th threshold signal is greater than this Second Threshold signal.
10. the voltage adjusting method of an amplifying circuit, it is characterized in that, in order to one first power supply signal and second source signal to amplifying circuit to be provided, make this amplifying circuit provide one to output signal to a load according to an input signal, this first power supply signal and this second source signal, this voltage adjusting method comprises:
In the time of first period, use this first power supply signal of a generating circuit from reference voltage to be set to a first signal value, and be a secondary signal value by this second source signal setting;
According to this first power supply signal and this second source signal at least one of them and according to this output signal, and use a subtraction circuit produce a difference signal;
Use a threshold value to produce circuit and produce a first threshold signal;
Use relatively this first threshold signal and this difference signal of a comparison circuit; And
In the time that this difference signal is greater than this first threshold signal, this generating circuit from reference voltage is set in the time of second period, this first power supply signal is set to one the 3rd signal value, and is one the 4th signal value by this second source signal setting;
Wherein the 3rd signal value is less than this first signal value, and the 4th signal value is more than or equal to this secondary signal value.
11. voltage adjusting methods as claimed in claim 10, is characterized in that, separately comprise:
Use a counting circuit to calculate the cumulative number that this difference signal is less than this first threshold signal; And
In the time that this cumulative number is greater than a default calculation times, this generating circuit from reference voltage is set in the time of this second period, this first power supply signal is set to the 3rd signal value, and is the 4th signal value by this second source signal setting.
12. voltage adjusting methods as claimed in claim 10, is characterized in that, separately comprise:
Use this threshold value to produce circuit and produce a Second Threshold signal;
Use relatively this Second Threshold signal and this difference signal of this comparison circuit; And
In the time that this difference signal is less than this Second Threshold signal, this generating circuit from reference voltage is set in the time of the 3rd period, this first power supply signal is set to one the 5th signal value, and is one the 6th signal value by this second source signal setting;
Wherein the 5th signal value is greater than this first signal value, and the 6th signal value is less than or equal to this secondary signal value.
13. voltage adjusting methods as claimed in claim 10, is characterized in that, separately comprise:
Use a load circuit for detecting to detect a resistance value of this load;
In the time that this resistance value of this load is less than one first default resistance value, this threshold value generation circuit is set provides this first threshold signal to this generating circuit from reference voltage; And
In the time that this resistance value of this load is greater than this first default resistance value, this threshold value generation circuit is set provides one the 3rd threshold signal to this generating circuit from reference voltage;
Wherein the 3rd threshold signal is less than this first threshold signal.
14. voltage adjusting methods as claimed in claim 13, is characterized in that, separately comprise:
In the time that this resistance value of this load is less than one second default resistance value, this threshold value generation circuit is set provides one the 5th threshold signal to this generating circuit from reference voltage;
Wherein this first default resistance value is greater than this second default resistance value, and the 5th threshold signal is greater than this first threshold signal.
15. voltage adjusting methods as claimed in claim 11, is characterized in that, separately comprise:
Use a load circuit for detecting to detect a resistance value of this load;
In the time that this resistance value of this load is less than one first default resistance value, this threshold value generation circuit is set provides this first threshold signal to this generating circuit from reference voltage; And
In the time that this resistance value of this load is greater than this first default resistance value, this threshold value generation circuit is set provides one the 3rd threshold signal to this generating circuit from reference voltage;
Wherein the 3rd threshold signal is less than this first threshold signal.
16. voltage adjusting methods as claimed in claim 15, is characterized in that, separately comprise:
In the time that this resistance value of this load is less than one second default resistance value, this threshold value generation circuit is set provides one the 5th threshold signal to this generating circuit from reference voltage;
Wherein this first default resistance value is greater than this second default resistance value, and the 5th threshold signal is greater than this first threshold signal.
17. voltage adjusting methods as claimed in claim 15, is characterized in that, separately comprise:
In the time that this resistance value of this load is less than this first default resistance value, this threshold value generation circuit is set provides this Second Threshold signal to this generating circuit from reference voltage; And
In the time that this resistance value of this load is greater than this first default resistance value, this threshold value generation circuit is set provides one the 4th threshold signal to this generating circuit from reference voltage;
Wherein the 4th threshold signal is less than this Second Threshold signal.
18. voltage adjusting methods as claimed in claim 15, is characterized in that, separately comprise:
In the time that this resistance value of this load is less than one second default resistance value, this threshold value generation circuit is set provides one the 6th threshold signal to this generating circuit from reference voltage;
Wherein this first default resistance value is greater than this second default resistance value, and the 6th threshold signal is greater than this Second Threshold signal.
19. 1 kinds of voltage-regulating circuits, it is characterized in that, in order to one first power supply signal and second source signal to amplifying circuit to be provided, make this amplifying circuit provide one to output signal to a load according to an input signal, this first power supply signal and this second source signal, this voltage-regulating circuit comprises:
One generating circuit from reference voltage, in the time of first period, this first power supply signal is set to a first signal value, and is a secondary signal value by this second source signal setting;
One subtraction circuit, couples this voltage generation circuit, in order to according to this first power supply signal and this second source signal at least one of them and produce a difference signal according to this output signal;
One threshold value produces circuit, in order to produce a first threshold signal; And
One comparison circuit, is coupled to this threshold value and produces circuit and this subtraction circuit, relatively this first threshold signal and this difference signal;
Wherein, in the time that this difference signal is greater than this first threshold signal, this comparison circuit arranges this generating circuit from reference voltage in the time of second period, and this first power supply signal is set to one the 3rd signal value, and is one the 4th signal value by this second source signal setting; And the 3rd signal value is less than or equal to this first signal value, the 4th signal value is greater than this secondary signal value.
20. voltage-regulating circuits as claimed in claim 19, is characterized in that, in when this threshold value produces, circuit is another produces a Second Threshold signal, and relatively this Second Threshold signal and this difference signal of this comparison circuit; In the time that this difference signal is less than this Second Threshold signal, this comparison circuit arranges this generating circuit from reference voltage in the time of the 3rd period, and this first power supply signal is set to one the 5th signal value, and is one the 6th signal value by this second source signal setting; And the 5th signal value is more than or equal to this first signal value, the 6th signal value is less than this secondary signal value.
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| CN201310038502.9A CN103973231B (en) | 2013-01-31 | 2013-01-31 | Voltage adjustment circuit of amplification circuit and related adjustment method |
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| CN201310038502.9A CN103973231B (en) | 2013-01-31 | 2013-01-31 | Voltage adjustment circuit of amplification circuit and related adjustment method |
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| CN103973231B CN103973231B (en) | 2017-04-26 |
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