CN100382418C - Multiple circuit of program controllable regulation output voltage - Google Patents
Multiple circuit of program controllable regulation output voltage Download PDFInfo
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- CN100382418C CN100382418C CNB2005100631565A CN200510063156A CN100382418C CN 100382418 C CN100382418 C CN 100382418C CN B2005100631565 A CNB2005100631565 A CN B2005100631565A CN 200510063156 A CN200510063156 A CN 200510063156A CN 100382418 C CN100382418 C CN 100382418C
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Abstract
The present invention discloses a multiple circuit which is controlled by a program and can adjust output voltage. The present invention is compared with a reference voltage through the backtracking of the output voltage; the output voltage is pressurized through that a generator for time and pulses is used for controlling whether a voltage pump operates or not; the output voltage is maintained within the reserved range; the stabilized voltage of a voltage stabilizing circuit is used for providing the stabilized output voltage to be used by loads.
Description
Technical field
The present invention relates to a kind of voltage multiplying circuit, the multiple circuit of a kind of especially low-loss and program-controlled adjustment output voltage.
Background technology
Direct current (DC) is the electronic equipment voltage source of normal use, for the electronic equipment (or electronic component) that is applicable to different driving voltage, generally can use the DC-DC transducer to change the size of voltage.See also shown in Figure 1, it is general DC-DC electric pressure converter commonly used, it comprises a reducing transformer 1 (bandgap), a voltage pump 2 (pumpingCKT) and a voltage stabilizing circuit 3 (regulator), and the user can go to select the characteristic of element according to required voltage supply; Suppose that the user needs the output voltage V out of 7.2v, and system voltage Vcc with 2.4v～3.6v, then it can select the reducing transformer 1 of 1.2v and 6 times voltage pump 2, behind the step-down formation 1.2v of this system voltage Vcc elder generation through reducing transformer 1, extraordinarily press the output voltage V out that can form 7.2v through 6 of voltage pump 2 again, the last voltage stabilizing of passing through this voltage stabilizing circuit 3 again, the required stable output voltage V out of 7.2v can be provided, if the client pays no attention to variation in voltage slightly, then this voltage stabilizing circuit 3 can not use yet.
Aforesaid electric pressure converter is through the step-down of reducing transformer 1, utilize voltage pump 2 pressurizations of high multiple again, therefore its energy dissipation is quite serious, therefore see also shown in Figure 2, developed at present and the function mode of direct using system voltage vcc as the source voltage of voltage pump 2, same hypothesis user needs the output voltage V out of 7.2v and has the system voltage Vcc of 2.4v～3.6v, then it needs to use 3 times voltage pump 2, pass through the step-down and the voltage stabilizing of voltage stabilizing circuit 3 again, the required stable output voltage V out of 7.2v can be provided, it can improve the operational paradigm of voltage pump 2 in view of the above, and reduces the consume of integral energy.
When and for example the operating voltage of system voltage Vcc is wide, but when needing direct using system voltage vcc as the function mode of the source voltage of voltage pump 2, the output voltage V out that needs 5.0v as hypothesis, but when having the system voltage Vcc of 2.0v～3.6v, then when system voltage Vcc=3.0～3.6v, use 2 times voltage pump 2; When system voltage Vcc=2.0～2.5v, use 3 times voltage pump 2; When system voltage Vcc=2.5～3.0v, then voltage pump 2 switches between 2 to 3 times, step-down and voltage stabilizing by voltage stabilizing circuit 3 is stabilized in 5.0v with output voltage V out again, though this function mode is applicable to having wider system voltage Vcc, yet as system voltage Vcc during at 2.5～3.0v, voltage pump 2 can switch between 2 to 3 times, and has a strong impact on the conversion efficiency of its voltage.
Though obvious aforesaid DC-DC electric pressure converter can be according to user's demand service voltage, however its process in voltage transitions need inevitably through step-down, supplying with the required voltage of load, thereby can cause unnecessary energy loss.
Summary of the invention
So main purpose of the present invention is to provide a kind of multiple circuit of low-loss.
Secondary objective of the present invention is to provide a kind of multiple circuit of program-controlled adjustment output voltage.
The present invention is a kind of multiple circuit of program-controlled adjustment output voltage, it comprise a voltage pump (pumping CKT), a clock generator (CLK generator), with a comparator (comparator), this voltage pump has an input, a control end and an output; This clock generator is connected with the control end of this voltage pump, and its clocking is controlled the action of this voltage pump, allows the input voltage of input of this voltage pump, is pressed in this output by adding of this voltage pump and produces output voltage; This comparator has two inputs and an output, the output of this comparator is connected with this clock generator, an input of this comparator is connected with this voltage delivery side of pump, another input input reference voltage of this comparator, in view of the above when the output voltage of this voltage delivery side of pump is lower than this reference voltage, utilizing this comparator to start this clock generator drives this voltage pump and carries out compression motion, when the output voltage of this voltage delivery side of pump is higher than this reference voltage, therefore utilize this comparator to close this clock generator again, use for a load as long as program control this reference voltage is the output voltage of this voltage delivery side of pump of may command.
In addition for avoiding this voltage pump switch number of times too frequently to cause loss in efficiency and reducing the life-span, output voltage by this voltage delivery side of pump backtracking can produce one first backtracking voltage and one second backtracking voltage through a bleeder circuit earlier, the auxiliary while through a multiplexer (multiplexer) is connected with this comparator again, in view of the above when this first backtracking voltage is lower than this reference voltage, utilizing this comparator to start this clock generator drives this voltage pump and carries out compression motion, when this second backtracking voltage is higher than this reference voltage, utilize this comparator to close this clock generator again, can reduce the frequency of this voltage pump switch in view of the above.
Description of drawings
Fig. 1 is the calcspar of existing DC-DC electric pressure converter.
Fig. 2 is the calcspar of another existing DC-DC electric pressure converter.
Fig. 3 is the calcspar according to the DC-DC electric pressure converter of first embodiment of the invention.
Fig. 4 is the calcspar according to the DC-DC electric pressure converter of second embodiment of the invention.
Fig. 5 is the sequential chart according to second embodiment of the invention.
Fig. 6 is the calcspar that installs voltage stabilizing circuit additional according to first embodiment of the invention.
Fig. 7 is the calcspar that installs voltage stabilizing circuit additional according to second embodiment of the invention.
Embodiment
Relevant detailed content of the present invention and technical descriptioon, existing accompanying drawings is as follows:
See also shown in Figure 3ly, it is the first embodiment of the present invention, multiple circuit according to the present invention comprise a voltage pump 10, clock generator 20, with a comparator 30.
This voltage pump 10 have an input 10a, control end 10c, with an output 10b.
This clock generator 20 is connected with the control end 10c of this voltage pump 10, its clocking is controlled starting or stoping of this voltage pump 10, the input voltage Vcc of the input 10a of this voltage pump 10 is by this output 10b generation output voltage V out that stresses on this voltage pump 10 of this voltage pump 10.
This comparator 30 has two input 30a and an output 30b, the output 30b of this comparator 30 is connected with this clock generator 20, an input 30a of this comparator 30 is connected with the output 10b of this voltage pump 10, and another input 30a of this comparator 30 is input reference voltage Vref then.
During circuit start, this clock generator 20 can drive this voltage pump 10 and constantly pressurize, output voltage V out with the output 10b of this voltage pump 10 that pressurizes, and the continuous backtracking of output voltage V out (feedback) of the output 10b of this voltage pump 10 is to this comparator 30, when the output voltage V out as the output 10b of this voltage pump 10 is higher than this reference voltage Vref, utilize this comparator 30 to produce this clock generator 20 of signal at stop, carry out compression motion to stop to drive this voltage pump 10, the output voltage V out of the output 10b of this voltage pump 10 can be consumed by a load (scheming not formula) and constantly reduce at this moment, when the output voltage V out as the output 10b of this voltage pump 10 is lower than this reference voltage Vref, utilize this comparator 30 to produce these clock generator 20 these voltage pumps 10 of driving of signal enabling again and carry out compression motion, and then the action circuit of formation circulation, therefore need only program control this reference voltage Vref, promptly the output voltage V out of the output 10b of this voltage pump 10 of may command uses for this load (not shown).
Please consult shown in Figure 4ly again, it is the second embodiment of the present invention, multiple circuit according to the present invention comprise a voltage pump 10, clock generator 20, comparator 30, multiplexer 40, with a bleeder circuit 50.
This clock generator 20 is connected with the control end 10c of this voltage pump 10, its clocking is controlled starting or stoping of this voltage pump 10, and this output 10b that the input voltage Vcc of this input 10a of this voltage pump 10 is pressed in this voltage pump 10 by adding of this voltage pump 10 produces output voltage V out.
This voltage pump 10 have an input 10a, control end 10c, with an output 10b.
This clock generator 20 is connected with the control end 10c of this voltage pump 10, it produces discontinuous clock signal and uses starting or stoping of this voltage pump 10 of control, the input voltage Vcc of this input 10a of this voltage pump 10, the voltage-multiplying circuit by this voltage pump 10 make the output 10b of this voltage pump 10 produce output voltage V out.
This comparator 30 has two input 30a and an output 30b, and the output 30b of this comparator 30 is connected with this clock generator 20, an input 30a input reference voltage Vref of this comparator 30.
This multiplexer 40 have an output 40b, selecting side 40c, first input end 40a1, with one second input 40a2, the output 40b of this multiplexer 40 is connected with another input 30a of this comparator 30, and the selecting side 40c of this multiplexer 40 is connected with the output 30b of this comparator 30.
This bleeder circuit 50 has an input 50a and an output 50b, its input 50a is connected with one first resistance R a, first a tie point A, the 3rd resistance R c, second a tie point B and one second resistance R b in regular turn to output 50b, the input 50a of this bleeder circuit 50 is connected with the output 10b of this voltage pump 10, this first tie point A is connected with this first input end 40a1 of this multiplexer 40, this second tie point B is connected with this second input 40a2, and the output 50b of this bleeder circuit 50 is ground connection then.
Please consult shown in Figure 5 more in the lump, its be the output 10b of voltage pump 10 of the present invention output voltage V out, voltage pump 10, with the sequential chart of clock generator 20, as shown in the figure, its time interval can be divided into Ti interval (between the sintering), Ta interval, with the Tb interval; It at first is the interval and Ta interval of Ti, during circuit start, this clock generator 20 can drive this voltage pump 10 and constantly pressurize, output voltage V out with the output 10b that increases this voltage pump 10, and the output voltage V out of this output 10b produces one first backtracking voltage Vrefl through this bleeder circuit 50 at this first tie point A, produce the second backtracking voltage Vref2 at this second tie point B, the output voltage V out of this first backtracking voltage Vref1 and this second backtracking voltage Vref2 and this output 10b, this first resistance R a, the relation of this second resistance R b and the 3rd resistance R c is as follows:
This multiplexer 40 this second input of selection 40a2 are path at the beginning, allow the continuous backtracking of this second backtracking voltage Vref2 to this comparator 30, up to when this second backtracking voltage Vref2 is higher than this reference voltage Vref, promptly utilize this comparator 30 to produce this clock generator 20 of signal at stop, and then stop the action of this voltage pump 10, and this comparator 30 produces the path of this multiplexer 40 of signal change simultaneously, selecting this first input end 40a1 is path, this moment, the input 30a of this comparator 30 changed this first backtracking voltage of input Vref1 into, right because this moment, this second backtracking voltage Vref2 was less than this first backtracking voltage Vref1, therefore change into when selecting this first input end 40a1 to be path when this multiplexer 40, can't make the state change of this comparator 30 and clocking.
Then be the Tb interval, the output voltage V out of the output 10b of this voltage pump 10 of process can be consumed by the load (not shown) and constantly reduce in time, relative this first backtracking voltage Vref1 also can constantly reduce, up to when this first backtracking voltage Vref1 is lower than this reference voltage Vref, this comparator 30 promptly can produce this clock generator of signal enabling 20 and drove these voltage pumps 10 and carry out compression motion this moment, and change the path of this multiplexer 40 simultaneously, making it select this second input 40a2 is path, same this moment second, backtracking voltage Vref2 was less than this first backtracking voltage Vref1, changing this multiplexer 40 this first input end of selection 40a2 this moment is path, and the state of this comparator 30 is changed; As mentioned above, Ta is interval can constantly to be repeated with Tb is interval, promptly forms do action.And the output voltage V out of the output of this voltage pump 10 is remained on
Therefore need only program control this reference voltage Vref, this first resistance R a, this second resistance R b or the 3rd resistance R c, promptly the output voltage V out of the output 10b of this voltage pump 10 of may command uses for this load (not shown).
In addition, as Fig. 6 and shown in Figure 7, aforesaid first embodiment and second embodiment all can install a voltage stabilizing circuit 60 (regulator) additional behind the output 10b of this voltage pump 10, this voltage stabilizing circuit 60 is by comparator, transistor Q, is constituted with resistance R 1, R2, it can do last voltage stabilizing and step-down to output voltage V out by the size of adjusting resistance R 1, R2, and it can provide the more stable voltage of load (not shown) to supply with; And the first resistance R a among second embodiment, the second resistance R b, with the 3rd resistance R c can adopt semiconductor to make the variable resistor of program-controlled adjustment, adjust the 3rd resistance R c by this, can adjust the oscillation amplitude of output voltage V out of the output 10b of this voltage pump 10, adjust the output voltage V out that this first resistance R a and this second resistance R b then can change the output 10b of this voltage pump 10, thereby can meet the unequally loaded demand, and reach the demand of program control adjustment.
As mentioned above, the present invention need be through the program of step-down, can multiplier electrode not provide required output voltage for the load use, thereby can reduce unnecessary energy loss, and it can the variable-resistance resistance value of program control change, uses the change output voltage.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the multiple circuit of a program-controlled adjustment output voltage is characterized in that comprising:
Voltage pump (10) has an input (10a), a control end (10c) and an output (10b);
Clock generator (20) is connected with the control end (10c) of described voltage pump (10), and its clocking is to control the action of described voltage pump (10);
Comparator (30), described comparator (30) has two inputs (30a) and an output (30b), the output (30b) of described comparator (30) is connected with described clock generator (20), an input (30a) input reference voltage (Vref) of described comparator (30);
Multiplexer (40), described multiplexer (40) have an output (40b), a selecting side (40c), a first input end (40a1), with one second input (40a2), the output (40b) of described multiplexer (40) is connected with another input (30a) of described comparator (30), and the selecting side (40c) of described multiplexer (40) is connected with the output (30b) of described comparator (30);
Bleeder circuit (50), have an input (50a) and an output (50b), its input (50a) is connected with one first resistance (Ra) in regular turn to output (50b), one first tie point (A), one the 3rd resistance (Rc), one second tie point (B), with one second resistance (Rb), the input (50a) of described bleeder circuit (50) is connected with the output (10b) of described voltage pump (10), described first tie point (A) is connected with the first input end (40a1) of described multiplexer (40), described second tie point (B) is connected with second input (40a2) of described multiplexer (40), and the output (50b) of described bleeder circuit (50) is ground connection then.
2. multiple circuit according to claim 1 is characterized in that, the output (10b) of described voltage pump (10) also connects a voltage stabilizing circuit (60).
3. multiple circuit according to claim 1 is characterized in that, described the 3rd resistance (Rc) is the variable resistor of program-controlled adjustment.
4. multiple circuit according to claim 1 is characterized in that, described first resistance (Ra) is the variable resistor of program-controlled adjustment with described second resistance (Rb).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100631565A CN100382418C (en) | 2005-04-05 | 2005-04-05 | Multiple circuit of program controllable regulation output voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100631565A CN100382418C (en) | 2005-04-05 | 2005-04-05 | Multiple circuit of program controllable regulation output voltage |
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| Publication Number | Publication Date |
|---|---|
| CN1848635A CN1848635A (en) | 2006-10-18 |
| CN100382418C true CN100382418C (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100631565A Expired - Fee Related CN100382418C (en) | 2005-04-05 | 2005-04-05 | Multiple circuit of program controllable regulation output voltage |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100865852B1 (en) * | 2007-08-08 | 2008-10-29 | 주식회사 하이닉스반도체 | Regulator and high voltage generator |
| KR102021415B1 (en) * | 2012-12-14 | 2019-09-16 | 에스케이하이닉스 주식회사 | Voltage generator circuit |
| US10606294B1 (en) * | 2019-01-06 | 2020-03-31 | Novatek Microelectronics Corp. | Low dropout voltage regulator and related method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5444412A (en) * | 1991-09-05 | 1995-08-22 | Gemplus Card International | Programming voltage regulation circuit for programmable memories |
| US6011724A (en) * | 1996-11-28 | 2000-01-04 | Sgs-Thomson Microelectronics S.A. | Circuit and method for the erasure of a non-volatile and electrically erasable memory |
| CN1372372A (en) * | 2001-02-23 | 2002-10-02 | 皇家菲利浦电子有限公司 | Driving circuit distribution for display unit with self-adaptive time sequence |
-
2005
- 2005-04-05 CN CNB2005100631565A patent/CN100382418C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5444412A (en) * | 1991-09-05 | 1995-08-22 | Gemplus Card International | Programming voltage regulation circuit for programmable memories |
| US6011724A (en) * | 1996-11-28 | 2000-01-04 | Sgs-Thomson Microelectronics S.A. | Circuit and method for the erasure of a non-volatile and electrically erasable memory |
| CN1372372A (en) * | 2001-02-23 | 2002-10-02 | 皇家菲利浦电子有限公司 | Driving circuit distribution for display unit with self-adaptive time sequence |
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| CN1848635A (en) | 2006-10-18 |
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