CN201011557Y - AC to DC power supply circuit - Google Patents
AC to DC power supply circuit Download PDFInfo
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- CN201011557Y CN201011557Y CNU2006201231216U CN200620123121U CN201011557Y CN 201011557 Y CN201011557 Y CN 201011557Y CN U2006201231216 U CNU2006201231216 U CN U2006201231216U CN 200620123121 U CN200620123121 U CN 200620123121U CN 201011557 Y CN201011557 Y CN 201011557Y
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Abstract
The utility model relates to a high efficiency power source circuit, which comprises an input electrical crystal, an input sense circuit, a second electrical crystal and an output sense circuit. The input electrical crystal contains a negative critical value and is coupled with a voltage source, so as to supply voltage to the output terminal of a power source circuit; the input sense circuit is coupled with the voltage power source and generates a control signal when the voltage level of the voltage source is higher than the critical voltage; the second electrical crystal is coupled with the input sense circuit and stops the input electrical crystal according to the control signal; the output sense circuit is coupled with a supply circuit and generates a first enabling signal when the voltage level of the voltage is higher than a high output voltage level; the first enabling signal is used for stopping input electrical crystal; the output sense circuit generates a second enabling signal when the voltage level of the supplying voltage is lower than a low output voltage level; and the second enabling signal is used for stopping the output of the power source circuit.
Description
Technical field
The utility model relates to a kind of power supply changeover device, is meant a kind of AC/DC power circuit of power supply changeover device especially.
Background technology
See also Fig. 1, it is a circuit diagram of commonly using power supply unit.As shown in the figure, power supply unit is used for a line voltage (line voltage) V
ACBe converted to one and adjust voltage V
ZOne rectification circuit 10, it is coupled to line voltage V
ACAnd rectification is to produce an input voltage V
INOne electric capacity 11, it is coupled to rectification circuit 10 and receives this input voltage V
INAnd couple an electric capacity 15, adjust voltage V to produce
ZOne Zener diode 16, it is coupled to electric capacity 15 and earth terminal and adjusts being used for.One resistance 12, it is used for electric capacity 11 discharges.The power supply unit of this kind pattern has been widely used in home devices, for example coffee machine, cooling fan and telepilot etc.Yet the power supply unit of this kind form has the shortcoming of high power loss, particularly under underload and no-load condition.Above-mentioned resistance 12 can produce the loss of power that is showing with Zener diode 16, so must reduce power attenuation in order to save power supply.
Therefore, the utility model promptly provides a kind of high efficiency power supply unit at the problems referred to above, with loss capable of reducing power source under underload and no-load condition, effectively to address the above problem.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of AC/DC power circuit, its cpable of lowering power loss and save power supply, and then raise the efficiency.
The purpose of this utility model and solve its technical matters and realize by the following technical solutions.According to the AC/DC power circuit that the utility model proposes, it includes an input electric crystal, and the input electric crystal is a negative critical assembly and receives a voltage source; One first electric crystal, it is series at the input electric crystal so that the output terminal of a supply voltage to power circuit to be provided; One input circuit for detecting, it is coupled to voltage source and produces a controlling signal according to the voltage quasi position of voltage source; One second electric crystal, it is coupled to the input circuit for detecting and ends the input electric crystal and first electric crystal according to controlling signal; One output circuit for detecting, it is coupled to supply voltage and produces one first enable signal and one second enable signal according to the voltage quasi position of supplying voltage; One impedance means, it is coupled to the input electric crystal and first electric crystal, the conducting input electric crystal and first electric crystal so that bias voltage to be provided.First enable signal ends the input electric crystal and first electric crystal when the voltage quasi position of supply voltage is higher than the accurate position of a high output voltage; Second enable signal is used for ending the output of power circuit when the voltage quasi position of supply voltage is lower than the accurate position of a low output voltage.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.
Described AC/DC power circuit, wherein this input electric crystal is a negative critical assembly.
Described AC/DC power circuit, wherein this first electric crystal and this second electric crystal are positive critical assembly.
Described AC/DC power circuit, wherein this input circuit for detecting is coupled to this voltage source via a bleeder circuit.
Described AC/DC power circuit, wherein this impedance means is a resistance or is an electric crystal.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.AC/DC power circuit of the present utility model, it includes: an input electric crystal couples a voltage source so that a supply voltage to be provided; One input circuit for detecting is coupled to this voltage source and produces a controlling signal with the voltage quasi position according to this voltage source; One impedance means is coupled to this input electric crystal, this input electric crystal of conducting so that bias voltage to be provided; Wherein, when the voltage quasi position of this voltage source was higher than a critical voltage, this controlling signal was by this input electric crystal.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.
Described AC/DC power circuit, wherein this input electric crystal is a negative critical assembly.
Described AC/DC power circuit, wherein this input electric crystal is a negative critical assembly.
Described AC/DC power circuit, wherein this input circuit for detecting more is coupled to one second electric crystal, and this second electric crystal is coupled to this input electric crystal, to import electric crystal according to this controlling signal by this.
Described AC/DC power circuit, wherein more include an output circuit for detecting, this output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal.
Described AC/DC power circuit, wherein this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal is used for ending the output of this power circuit when the voltage quasi position of this supply voltage is lower than position, a low output voltage Huaihe River.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.AC/DC power circuit of the present utility model, it includes: an input electric crystal couples a voltage source; One first electric crystal is series at this input electric crystal so that a supply voltage to be provided; One output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage; One impedance means is coupled to this input electric crystal and this first electric crystal, this input electric crystal of conducting and this first electric crystal so that bias voltage to be provided; Wherein, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal and this first electric crystal.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.
Described AC/DC power circuit, wherein this input electric crystal is a negative critical assembly.
Described AC/DC power circuit, wherein this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal is used for ending the output of this power circuit when the voltage quasi position of this supply voltage is lower than the accurate position of a low output voltage.
Described AC/DC power circuit, wherein this first electric crystal is a positive critical assembly.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.AC/DC power circuit of the present utility model, it includes: an input electric crystal couples a voltage source so that a supply voltage to be provided; One output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage;
One impedance means is coupled to this input electric crystal, this input electric crystal of conducting so that bias voltage to be provided; Wherein, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.
Described AC/DC power circuit, wherein this input electric crystal is a negative critical assembly.
Described AC/DC power circuit, wherein this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal is used for ending the output of this supply circuit when the voltage quasi position of this supply voltage is lower than the accurate position of a low output voltage.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.AC/DC power circuit of the present utility model, it includes: an input electric crystal couples a voltage source so that a supply voltage to be provided; One output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage; Wherein, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal.
The purpose of this utility model and solve its technical matters and also adopt following technical measures further to realize.
Described AC/DC power circuit, wherein this first enable signal this input electric crystal of conducting when the voltage quasi position of this supply voltage is lower than a sluggish standard position.
Described AC/DC power circuit, wherein this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal ends the output of this power circuit when the voltage quasi position of this supply voltage is lower than the accurate position of a low output voltage.
According to the AC/DC power circuit of power supply changeover device described in the utility model, under underload and no-load condition, can reduce the loss of power, save power supply, and then raise the efficiency.
Description of drawings
Fig. 1 is the circuit diagram of conventional power source supply;
Fig. 2 is the circuit diagram of a preferred embodiment of power supply unit of the present utility model;
Fig. 3 is the circuit diagram of a preferred embodiment of the supply circuit of power supply unit of the present utility model;
Fig. 4 is the circuit diagram of a preferred embodiment of the output circuit for detecting of supply circuit of the present utility model;
Fig. 5 is the circuit diagram of another preferred embodiment of the supply circuit of power supply unit of the present utility model;
Fig. 6 is the circuit diagram of another preferred embodiment of power supply unit of the present utility model;
Fig. 7 is the oscillogram of input voltage of the power supply unit of the utility model Fig. 6;
Fig. 8 is the circuit diagram of a preferred embodiment of supply circuit of the power supply unit of the utility model Fig. 6;
Fig. 9 is the circuit diagram of another preferred embodiment of supply circuit of the power supply unit of the utility model Fig. 6;
Figure 10 is the circuit diagram of a preferred embodiment of low dropout voltage regulator of the present utility model.
The figure number explanation:
10 rectification circuits, 11 electric capacity
12 resistance, 15 electric capacity
16 Zener diodes, 20 supply circuits
30 supply circuits, 40 bleeder circuits
41 resistance, 42 resistance
50 electric capacity, 55 electric capacity
60 input electric crystals, 65 second electric crystals
70 impedance means, 75 input circuit for detecting
80 first electric crystals, 100 output circuit for detecting
110 Zener diodes, 112 Zener diodes
115 resistance, 116 resistance
117 resistance, 120 electric crystals
125 electric crystals, 129 electric crystals
140 electric crystals, 150 Zener diodes
155 resistance, 156 resistance
165 electric crystals, 170 electric crystals
300 low dropout voltage regulators, 310 operational amplifiers
320 transfer elements, 325 resistance
351 resistance, 352 resistance
The DET sense terminal EN second activation end
GND earth terminal IN input end
V
ACLine electricity V
CSupply voltage
V
INInput voltage V
OOutput voltage
V
REFReference voltage V
TCritical voltage
V
ZAdjust voltage OUT second output terminal
The OV first activation end SW first output terminal
S
ENThe second enable signal S
OVFirst enable signal
Embodiment
For making the auditor further understanding and understanding more be arranged to architectural feature of the present utility model and the effect reached, sincerely help with preferred embodiment figure and cooperate detailed explanation, illustrate as after.
See also Fig. 2, it is the circuit diagram of power supply unit of the present utility model.As shown in the figure, rectification circuit 10, it is coupled to an input end IN of a supply circuit 20 and receives line voltage V
AC, to produce input voltage V
INInput voltage V
INIt is a voltage source and via rectification circuit 10 rectifications.Supply circuit 20 will produce a supply voltage V at one first output terminal SW
C, and produce an output voltage V at one second output terminal OUT
OOne earth terminal GND of supply circuit 20 is coupled to ground connection.One electric capacity 50, it is coupled to the first output terminal SW.In addition, more there is an electric capacity 55 to be coupled to the second output terminal OUT to keep energy.Supply circuit 20 can be power circuit, power supply circuit, power supply regulator circuit or comes source circuit for power supply.
See also Fig. 3, it is the circuit diagram of a preferred embodiment of the supply circuit 20 of power supply unit.Supply circuit 20 includes an input electric crystal 60.Input electric crystal 60 is coupled to input end IN and receives input voltage V
IN, so that this supply voltage V to be provided
CTo the first output terminal SW.Input electric crystal 60 is a negative critical assembly, for example Junction fet (JFET).Therefore zero-bias is imported electric crystal 60 with conducting, in addition only can be by a negative bias by input electric crystal 60.
One output circuit for detecting 100, it is coupled to the first output terminal SW, is used for detecting supply voltage V
C, with foundation supply voltage V
CVoltage quasi position and output circuit for detecting 100 one first activation end OV produce one first enable signal S
OVOne impedance means 70, it is coupled to input electric crystal 60, is biased into input electric crystal 60 to provide, and then conducting input electric crystal 60.Impedance means 70 can be resistance or is electric crystal.The first enable signal S
OVBe to be used at supply voltage V
CVoltage quasi position when being higher than the accurate position of a high output voltage by input voltage 60.One low pressure drop (Low Drop-Out, LDO) voltage stabilizer 300, and it is coupled to the second output terminal OUT and produces this output voltage V
OIn addition, output circuit for detecting 100 is more according to supply voltage V
CVoltage quasi position, output circuit for detecting 100 one second activation end EN produce one second enable signal S
ENThe second enable signal S
ENBe sent to low dropout voltage regulator 300, to supply voltage V
CVoltage quasi position when being lower than the accurate position of a low output voltage, by the output voltage V of supply circuit 20
O
See also Fig. 4, it is the circuit diagram of a preferred embodiment of output circuit for detecting 100.As shown in the figure, Zener diode the 110, the 112nd, series connection.Zener diode 112 more is coupled to the first output terminal SW, with detecting supply voltage V
CZener diode 110 is coupled to a resistance 115 in addition, and resistance 115 more is coupled to an electric crystal 120.Resistance 115 is used at supply voltage V
CVoltage quasi position conducting electric crystal 120 when being higher than the voltage of Zener diode 110 and 112.One electric crystal 125, it is parallel to Zener diode 112.When electric crystal 120 conductings, electric crystal 125 is with short circuit Zener diode 112, to reach the purpose of sluggish (hysteresis), to be used for detecting supply voltage V
CWhether too high.Zener diode 110 and 112 voltage determine the accurate position of this high output voltage.The voltage of Zener diode 112 then determines a sluggish accurate position of this sluggishness purpose.As supply voltage V
CVoltage quasi position when being lower than sluggish accurate position, the first enable signal S
OVElectric crystal 60 is imported in conducting.
One electric crystal 140, it is coupled to the electric crystal 120 and the first output terminal SW.Electric crystal 140 conducting according to the conducting state of electric crystal 120.One resistance 116, it is coupled to the first output terminal SW, electric crystal 125,140, and then provides one to be biased into electric crystal 125,140.One resistance 117, it is coupled to electric crystal 140, to be used for conducting one electric crystal 129 when electric crystal 120 conductings.Electric crystal 129 more is coupled to electric crystal 140.In addition, electric crystal 129 more is coupled to input electric crystal 60, to supply voltage V
CVoltage quasi position when being higher than the accurate position of this high output voltage, produce the first enable signal S
OVAnd by input electric crystal 60.
One Zener diode 150, it also is coupled to the first output terminal SW with detecting supply voltage V
COne resistance 155, it is coupled to a Zener diode 150 and an electric crystal 165, in case supply voltage V
CVoltage quasi position conducting electric crystal 165 then when being higher than the accurate position of this low output voltage.It is the accurate position of this low output voltage of decision that the checking of Zener diode 150 received voltage.One resistance 156, it is coupled to the first output terminal SW and an electric crystal 170.Electric crystal 170 more is coupled to the first output terminal SW and electric crystal 165.Electric crystal 170 is at supply voltage V
CVoltage quasi position produce the second enable signal S when being lower than the accurate position of low output voltage
EN
See also Fig. 5, it is the circuit diagram of another preferred embodiment of supply circuit 20.As shown in the figure, one first electric crystal 80 of this embodiment is to be series at input electric crystal 60, so that this supply voltage V to be provided
CTo the first output terminal SW.First electric crystal 80 is a positive critical assembly.Impedance means 70 is coupled to input electric crystal 60 and first electric crystal 80 so that bias voltage to be provided, and then the conducting input electric crystal 60 and first electric crystal 80.As supply voltage V
CVoltage quasi position when being higher than the accurate position of high output voltage, the first enable signal S
OVBy the input electric crystal 60 and first electric crystal 80.First electric crystal 80 is to be used to provide protection to supply circuit 20.As supply voltage V
CDuring by short circuit, first electric crystal 80 will be by importing electric crystal 60 with protection.
See also Fig. 6, it is the circuit diagram of another preferred embodiment of power supply unit of the present utility model.The conducting that this embodiment is coupled to rectification circuit 10 1 supply circuits 30 is to be synchronized with line voltage V with ending
ACThis supply circuit 30 can be power circuit, power supply circuit, power supply regulator circuit or power supply and comes source circuit.Supply circuit 30 only can be at input voltage V
INBe switched on when being lower than an input critical voltage, so can reduce the handoff loss of input electric crystal 60, and the efficient of promoting supply circuit 30.
See also Fig. 7, it is input voltage V
INOscillogram.As input voltage V
INBe lower than a critical voltage V
TThe time, input voltage V
INPower supply can be sent to the first output terminal SW.Critical voltage V wherein
TBe relevant with the input critical voltage.Supply circuit 30 includes a sense terminal DET, and it couples input voltage V via a bleeder circuit 40
INBleeder circuit 40 is coupled to input voltage V
INAnd sense terminal DET.Bleeder circuit 40 includes resistance 41,42.Resistance the 41, the 42nd, mutual series connection.
See also Fig. 8, it is the circuit diagram of a preferred embodiment of the supply circuit 30 of Fig. 6 power supply unit.As shown in the figure, supply circuit 30 includes input electric crystal 60, and input electric crystal 60 is coupled to input end IN and receives input voltage V
IN, so that this supply voltage V to be provided at the first output terminal SW
CAbove-mentioned input voltage V
INBe voltage source.What one input circuit for detecting 75, one positive input terminal were coupled to supply circuit 30 detects side DET, with via bleeder circuit 40 detecting input voltage V
IN, and according to input voltage V
INVoltage quasi position produce a controlling signal.Controlling signal is at input voltage V
INVoltage quasi position be higher than critical voltage V
TThe time by the input electric crystal 60.Controlling signal is to end input electric crystal 60 via one second electric crystal 65 that is coupled between input circuit for detecting 75 and the input electric crystal 60.Input circuit for detecting 75 includes this critical voltage V
TCritical voltage V
TRelevant with the input critical voltage.Critical voltage V
TBe coupled to a negative input end of input circuit for detecting 75.
Output circuit for detecting 100, it is coupled to the first output terminal SW with detecting supply voltage V
C, and then according to supply voltage V
CVoltage quasi position and produce the first enable signal S at the first activation end OV
OVThe circuit of the output circuit for detecting 100 of this embodiment be can a Fig. 4 circuit realize.Impedance means 70 is coupled to input electric crystal 60, so that bias voltage to be provided, and then conducting input electric crystal 60.The first above-mentioned enable signal S
OVBe to be coupled to input electric crystal 60, to supply voltage V
CVoltage quasi position when being higher than the accurate position of this high output voltage by input electric crystal 60.In addition, output circuit for detecting 100 more produces the second enable signal S at the second activation end EN
ENThe second enable signal S
ENBe sent to low dropout voltage regulator 300, to supply voltage V
CVoltage quasi position when being lower than the accurate position of this low output voltage by the output voltage V of supply circuit 30
OLow dropout voltage regulator 300 is coupled to the second output terminal OUT.
See also Fig. 9, it is the circuit diagram of another preferred embodiment of the supply circuit 30 of Fig. 6 power supply unit.As shown in the figure, supply circuit 30 includes input electric crystal 60, and it is coupled to input end IN to receive input voltage V
INFirst electric crystal 80, it is series at input electric crystal 60 so that this supply voltage V to be provided
CTo the first output terminal SW.Input circuit for detecting 75, its positive input terminal is coupled to the sense terminal DET of supply circuit 30, with detecting input voltage V
INAnd then according to input voltage V
INVoltage quasi position produce controlling signal.Input circuit for detecting 75 includes critical voltage V
T, it is coupled to the negative input end of input circuit for detecting 75.Second electric crystal 65, it is coupled to input circuit for detecting 75, input electric crystal 60 and first electric crystal 80, ends the input electric crystal 60 and first electric crystal 80 with the foundation controlling signal.As input voltage V
INVoltage quasi position be higher than critical voltage V
TThe time, the input electric crystal 60 and first electric crystal 80 will be cut off.First electric crystal 80 and second electric crystal 65 are positive critical assembly.
Output circuit for detecting 100, it is coupled to supply voltage V
C, with foundation supply voltage V
CVoltage quasi position produce the first enable signal S
OVWith the second enable signal S
ENImpedance means 70, it is coupled to input electric crystal 60 and first electric crystal 80, and so that bias voltage to be provided, and then the electric crystal 60 and first electric crystal 80 are imported in conducting.The first enable signal S
OVBe sent to the input electric crystal 60 and first electric crystal 80, to supply voltage V
CVoltage quasi position when being higher than the accurate position of this high output voltage by the input electric crystal 60 and first electric crystal 80.The second enable signal S
ENBe sent to low dropout voltage regulator 300, with the output voltage V of conduction and cut-off supply circuit 30
OAs supply voltage V
CVoltage quasi position when being lower than the accurate position of low output voltage, output voltage V
OTo be cut off.
See also Figure 10, it is the circuit diagram of low dropout voltage regulator 300 of the present utility model.As shown in the figure, it includes an operational amplifier 310, a transfer element (passelement) 320 and resistance 325,351,352.Operational amplifier 310, it includes a reference voltage V
REFReference voltage V
REFBe coupled to a negative input end of operational amplifier 310.Resistance 352, it is coupled to a positive input terminal of operational amplifier 310.The second enable signal S
ENBe sent to operational amplifier 310, allow operational amplifier 310 operate so that power supply to operational amplifier 310 to be provided.Transfer element 320, it is coupled to operational amplifier 310, the first output terminal SW and the second output terminal OUT.In case, the second enable signal S
ENDuring forbidden energy, operational amplifier 310 and transfer element 320 be forbidden energy thereupon also.Resistance 351, it is coupled to positive input terminal, transfer element 320 and the second output terminal OUT of operational amplifier 310.Resistance 325, it is coupled to transfer element 320, and transfer element 320 can be electric crystal.
The above, it only is the utility model one preferred embodiment, be not to be used for limiting the scope that the utility model is implemented, so all equalizations of doing according to the described shape of the utility model claim scope, structure, feature and spirit change and modify, and all should be included in the interest field of the present utility model.
Claims (21)
1. AC/DC power circuit is characterized in that it includes:
One input electric crystal couples a voltage source;
One first electric crystal is series at this input electric crystal so that a supply voltage to be provided;
One input circuit for detecting is coupled to this voltage source and produces a controlling signal with the voltage quasi position according to this voltage source;
One second electric crystal is coupled to this input circuit for detecting, this input electric crystal and this first electric crystal, and when the voltage quasi position of this voltage source was higher than a critical voltage, this second electric crystal was imported electric crystal and this first electric crystal according to this controlling signal by this;
One output circuit for detecting is coupled to this supply voltage and produces one first enable signal and one second enable signal with the voltage quasi position according to this supply voltage;
One impedance means is coupled to this input electric crystal and this first electric crystal, this input electric crystal of conducting and this first electric crystal so that bias voltage to be provided;
Wherein, when the voltage quasi position of this supply voltage is higher than the accurate position of a high output voltage, this first enable signal is by this input electric crystal and this first electric crystal, and this second enable signal was by the output of this power circuit when the voltage quasi position of this supply voltage was lower than low output voltage standard position.
2. AC/DC power circuit as claimed in claim 1 is characterized in that, this input electric crystal is a negative critical assembly.
3. AC/DC power circuit as claimed in claim 1 is characterized in that, this first electric crystal and this second electric crystal are positive critical assembly.
4. AC/DC power circuit as claimed in claim 1 is characterized in that, this input circuit for detecting is coupled to this voltage source via a bleeder circuit.
5. AC/DC power circuit as claimed in claim 1 is characterized in that, this impedance means is a resistance or is an electric crystal.
6. AC/DC power circuit is characterized in that it includes:
One input electric crystal couples a voltage source so that a supply voltage to be provided;
One input circuit for detecting is coupled to this voltage source and produces a controlling signal with the voltage quasi position according to this voltage source;
One impedance means is coupled to this input electric crystal, this input electric crystal of conducting so that bias voltage to be provided;
Wherein, when the voltage quasi position of this voltage source was higher than a critical voltage, this controlling signal was by this input electric crystal.
7. AC/DC power circuit as claimed in claim 6 is characterized in that, this input electric crystal is a negative critical assembly.
8. AC/DC power circuit as claimed in claim 6 is characterized in that, this input circuit for detecting is coupled to this voltage source via a bleeder circuit.
9. AC/DC power circuit as claimed in claim 6 is characterized in that, this input circuit for detecting more is coupled to one second electric crystal, and this second electric crystal is coupled to this input electric crystal, to import electric crystal according to this controlling signal by this.
10. AC/DC power circuit as claimed in claim 6, it is characterized in that, more include an output circuit for detecting, this output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal.
11. AC/DC power circuit as claimed in claim 10, it is characterized in that, this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal is used for ending the output of this power circuit when the voltage quasi position of this supply voltage is lower than the accurate position of a low output voltage.
12. an AC/DC power circuit is characterized in that it includes:
One input electric crystal couples a voltage source;
One first electric crystal is series at this input electric crystal so that a supply voltage to be provided;
One output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage;
One impedance means is coupled to this input electric crystal and this first electric crystal, this input electric crystal of conducting and this first electric crystal so that bias voltage to be provided;
Wherein, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal and this first electric crystal.
13. AC/DC power circuit as claimed in claim 12 is characterized in that, this input electric crystal is a negative critical assembly.
14. AC/DC power circuit as claimed in claim 12, it is characterized in that, this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal is used for ending the output of this power circuit when the voltage quasi position of this supply voltage is lower than the accurate position of a low output voltage.
15. AC/DC power circuit as claimed in claim 12 is characterized in that, this first electric crystal is a positive critical assembly.
16. an AC/DC power circuit is characterized in that it includes:
One input electric crystal couples a voltage source so that a supply voltage to be provided;
One output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage;
One impedance means is coupled to this input electric crystal, this input electric crystal of conducting so that bias voltage to be provided;
Wherein, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal.
17. AC/DC power circuit as claimed in claim 16 is characterized in that, this input electric crystal is a negative critical assembly.
18. AC/DC power circuit as claimed in claim 16, it is characterized in that, this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal is used for ending the output of this supply circuit when the voltage quasi position of this supply voltage is lower than the accurate position of a low output voltage.
19. an AC/DC power circuit is characterized in that it includes:
One input electric crystal couples a voltage source so that a supply voltage to be provided;
One output circuit for detecting is coupled to this supply voltage and produces one first enable signal with the voltage quasi position according to this supply voltage;
Wherein, when the voltage quasi position of this supply voltage was higher than the accurate position of a high output voltage, this first enable signal was by this input electric crystal.
20. AC/DC power circuit as claimed in claim 19 is characterized in that, this input electric crystal of conducting when this first enable signal is lower than a sluggish standard position at the voltage quasi position of this supply voltage.
21. AC/DC power circuit as claimed in claim 19, it is characterized in that, this output circuit for detecting more produces one second enable signal according to the voltage quasi position of this supply voltage, and this second enable signal ends the output of this power circuit when the voltage quasi position of this supply voltage is lower than the accurate position of a low output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201231216U CN201011557Y (en) | 2006-08-07 | 2006-08-07 | AC to DC power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201231216U CN201011557Y (en) | 2006-08-07 | 2006-08-07 | AC to DC power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201011557Y true CN201011557Y (en) | 2008-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201231216U Expired - Fee Related CN201011557Y (en) | 2006-08-07 | 2006-08-07 | AC to DC power supply circuit |
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| Country | Link |
|---|---|
| CN (1) | CN201011557Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908843B (en) * | 2006-08-07 | 2015-05-20 | 崇贸科技股份有限公司 | AC/DC power circuit |
-
2006
- 2006-08-07 CN CNU2006201231216U patent/CN201011557Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908843B (en) * | 2006-08-07 | 2015-05-20 | 崇贸科技股份有限公司 | AC/DC power circuit |
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