CN202168055U - Two-wire remote control switch and self-powered circuit - Google Patents
Two-wire remote control switch and self-powered circuit Download PDFInfo
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- CN202168055U CN202168055U CN2011203175226U CN201120317522U CN202168055U CN 202168055 U CN202168055 U CN 202168055U CN 2011203175226 U CN2011203175226 U CN 2011203175226U CN 201120317522 U CN201120317522 U CN 201120317522U CN 202168055 U CN202168055 U CN 202168055U
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Abstract
A two-wire remote control switch and a self-powered circuit comprise an AC power supply, a load, a rectifying circuit, a controllable silicon switch circuit, a low-voltage DC power supply circuit and a remote control switch main circuit. When standby, the two-wire remote control switch and the self-powered circuit employ a resistor with a relatively high resistance for current limiting and voltage division and for providing working voltage to the remote control switch main circuit, when the load works, load current flows by a diode string for generating forward voltage drop or flows by a voltage stabilization tube for generating voltage stabilization voltage drop so as to provide a working power supply to the remote control switch main circuit, and the remote control switch can work stably even when load power is smaller than 1 watt. The two-wire remote control switch and the self-powered circuit overcome the disadvantages that a conventional two-wire remote control switch cannot work normally when load current is very small, and is relatively high in cost and complex in circuit, are especially suitable for an LED energy saving lamp about to be popular, and are also suitable for being used as remote control switches of loads such as an energy saving lamp, an incandescent lamp, a heating wire, a motor, and the like.
Description
Affiliated technical field
The utility model relates to a kind of two wires remote control switch and remote control switch power supply circuits, in particular for a kind of two wires remote control switch of alternative original mechanical switch of electrical equipment control and the self-powered circuit of the electricity consumption of remote control switch own.
Background technology
At present, no matter the electric remote control switch is radio remote control switch or infrared remote control switch, generally all be four lines; Promptly two lines are that inlet wire (comprising live wire and zero line) connects civil power, and through behind the remote control switching circuit, two lines are that outlet connects electrical appliance; This uses remote control switch to bring inconvenience for the occasion that has installed circuit, if use the position of original switch, needs to revise circuit; Increase wiring, this is pretty troublesome thing.Will use remote control switch in the original position of the switch, have only two lines that use original switch, remote control switch self power supply is exactly a difficult problem like this; Remote control switch self power supply under the situation of standby, just must be provided by interchange through electrical appliance except using powered battery; This electric current is more little good more, and present technology is when remote control switch is in standby, to adopt a bigger resistance to connect with other circuit to tell the use of low pressure confession remote control switch, when loaded work piece; Load current flows through the transformer that is equivalent to current transformer by, and power supply road after this current boost is used, and the shortcoming of this circuit is to load when very little; During such as use LED electricity-saving lamp; The electric current itself that flows through load maybe be very little, and transformer's primary current is just very little, can't enough voltage be provided for secondary; Remote control switch can't normally be used, and cost is higher, complicated circuit.
The utility model content
In order to overcome existing two wires remote control switch when load is very little, remote control switch cisco unity malfunction and cost are higher, the shortcoming of complicated circuit, and the utility model provides a kind of two wires remote control switch and self-powered circuit that need not transformer, with head it off.The good effect that the utility model produces is: adopting the forward voltage drop of diode string or the voltage stabilizing pressure drop of voltage-stabiliser tube is that remote control switching circuit provides working power when loaded work piece; Even load is very little; Even be lower than under one watt the situation; This remote control switch can also stably be worked, and with low cost, circuit is succinct, reliable operation.
The utility model solves the technical scheme that its technical problem adopted:
A kind of two wires remote control switch and the self-powered circuit of the utility model; Form by AC power, load, rectification circuit, reverse-blocking tetrode thyristor circuit, low-voltage DC source circuit, remote control switch main circuit; Controllable silicon is unidirectionally, two-way all can; The silicon controlled anode A (one-way SCR) in the reverse-blocking tetrode thyristor circuit or the first electrode T1 (bidirectional triode thyristor) connect the positive pole of rectification circuit; The negative electrode K (one-way SCR) or the second electrode T2 (bidirectional triode thyristor) insert in the low-voltage DC source circuit, and control utmost point G (one-way SCR) or gate pole G (bidirectional triode thyristor) insert in the remote control switch main circuit through resistance.Adopt resistance, diode, voltage-stabiliser tube to pass through different combinations; Form the low-voltage DC source circuit (self-powered circuit) of two wires remote control switch; Specifically can be divided into several kinds of schemes: 1. in the low-voltage DC source circuit; The series circuit of being made up of big resistance resistance, voltage-stabiliser tube, diode string (being formed by both positive and negative polarity is continuous by a plurality of diodes) successively is connected between the positive pole and negative pole (ground connection) of rectification circuit; The diode string is connected by both positive and negative polarity by a plurality of diodes and forms, and the negative pole of the positive pole of diode string and silicon controlled negative electrode K or the second electrode T2, voltage-stabiliser tube links together the minus earth of diode string; The positive pole of one termination voltage-stabiliser tube of low frequency filtering electric capacity, high-frequency filter capacitor, other end ground connection; 2. in the low-voltage DC source circuit; Successively by big resistance resistance, diode (independent diode; Any diode in the non-diode string), the series circuit formed of diode string is connected between the positive pole and negative pole (ground connection) of rectification circuit, the positive pole of the positive pole of diode string and silicon controlled negative electrode K or the second electrode T2, diode links together the minus earth of diode string; The negative pole of low frequency filtering electric capacity, high-frequency filter capacitor one another diode of termination, other end ground connection; 3. in the low-voltage DC source circuit; The series circuit of being made up of big resistance resistance, little resistance resistance (resistance is less for big resistance resistance), diode string successively is connected between the positive pole and negative pole (ground connection) of rectification circuit; The positive pole of diode string and silicon controlled negative electrode K or the second electrode T2, little resistance resistance link together; The minus earth of diode string, low frequency filtering electric capacity, the little resistance resistance of high-frequency filter capacitor one termination, other end ground connection; 4. in the low-voltage DC source circuit; The series circuit of being made up of big resistance resistance, voltage-stabiliser tube, second voltage-stabiliser tube successively is connected between the positive pole and negative pole (ground connection) of rectification circuit; The negative pole of the positive pole of second voltage-stabiliser tube and silicon controlled negative electrode K or the second electrode T2, voltage-stabiliser tube links together; The minus earth of second voltage-stabiliser tube, low frequency filtering electric capacity, high-frequency filter capacitor one termination voltage-stabiliser tube positive pole, other end ground connection; 5. in the low-voltage DC source circuit; The series circuit of being made up of big resistance resistance, diode (the arbitrary diode in the non-diode string), second voltage-stabiliser tube (method of connecing is different from foregoing voltage-stabiliser tube) successively is connected between the positive pole and negative pole (ground connection) of rectification circuit; The positive pole of the positive pole of second voltage-stabiliser tube and silicon controlled negative electrode K or the second electrode T2, another diode links together; The minus earth of second voltage-stabiliser tube; The negative pole of low frequency filtering electric capacity, high-frequency filter capacitor one another diode of termination, other end ground connection; 6. in the low-voltage DC source circuit; Successively by big resistance resistance, little resistance resistance, (method of connecing is different from the voltage-stabiliser tube of telling as preceding to second voltage-stabiliser tube; The position that connects is different) series circuit formed is connected between the positive pole and negative pole (ground connection) of rectification circuit; One end of the positive pole of second voltage-stabiliser tube and silicon controlled negative electrode K or the second electrode T2, little resistance resistance links together; The minus earth of second voltage-stabiliser tube, an end of low frequency filtering electric capacity, the little resistance resistance of high-frequency filter capacitor one termination, other end ground connection.More than 6 kinds connect the self-powered circuit that method can both realize a kind of two wires remote control switch, the remote control switch main circuit can use a slice CD4013 to add that accessory circuit constitutes, CD4013 has two triggers, one is connected into monostable circuit, another is connected into bistable circuit; The remote control switch main circuit also can use a slice 4017 to add accessory circuit and be connected into bistable circuit, also can add accessory circuit by NE555 and be connected into bistable circuit, also can constitute bistable circuit by resolution element; The remote control switch main circuit can be triggered by wireless, infrared, laser signal and constitute wireless, infrared, laser remote-controlled switch.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is that the utility model adopts big resistance resistance, voltage-stabiliser tube, the series connection of diode string that power circuit principle figure is provided.
1. AC powers among the figure, 2. load, 3. rectification circuit, 4. reverse-blocking tetrode thyristor circuit, 5. low-voltage DC source circuit, 6. remote control switch main circuit.
Fig. 2 is the big resistance resistance of the utility model, diode, the diode string is connected provides power circuit principle figure.
1. AC powers among the figure, 2. load, 3. rectification circuit, 4. reverse-blocking tetrode thyristor circuit, 5. low-voltage DC source circuit, 6. remote control switch main circuit.
Fig. 3 is the big resistance resistance of the utility model, little resistance resistance, the diode string is connected provides power circuit principle figure.
1. AC powers among the figure, 2. load, 3. rectification circuit, 4. reverse-blocking tetrode thyristor circuit, 5. low-voltage DC source circuit, 6. remote control switch main circuit.
Fig. 4 is the big resistance resistance of the utility model, voltage-stabiliser tube, voltage-stabiliser tube is connected provides power circuit principle figure.
1. AC powers among the figure, 2. load, 3. rectification circuit, 4. reverse-blocking tetrode thyristor circuit, 5. low-voltage DC source circuit, 6. remote control switch main circuit.
Fig. 5 is the utility model resistance, diode, voltage-stabiliser tube is connected provides power circuit principle figure.
1. AC powers among the figure, 2. load, 3. rectification circuit, 4. reverse-blocking tetrode thyristor circuit, 5. low-voltage DC source circuit, 6. remote control switch main circuit.
Fig. 6 is the big resistance resistance of the utility model, little resistance resistance, voltage-stabiliser tube is connected provides power circuit principle figure.
1. AC powers among the figure, 2. load, 3. rectification circuit, 4. reverse-blocking tetrode thyristor circuit, 5. low-voltage DC source circuit, 6. remote control switch main circuit.
Embodiment
In the embodiment of Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, we are that example further specifies the utility model to implement a kind of two wires remote control switch and self-powered circuit:
In Fig. 1; Two wires remote control switch and self-powered circuit are by AC power 1 (part in the dotted line), load 2 (part in the dotted line), rectification circuit 3 (part in the dotted line), controllable silicon and drive circuit 4 (part in the dotted line), low-voltage DC source circuit 5 (part in the dotted line); Remote control switch main circuit 6 (part in the dotted line) is formed, and AC power 1 is generally civil power 220V power supply; Load 2 can be lighting, electric heater, motor even load; Rectification circuit 3 constitutes bridge rectifier by diode D1, D2, D3, D4, is direct current with the AC rectification of 220V; Reverse-blocking tetrode thyristor circuit 4 is made up of controllable silicon VT1 and resistance R 1, VT1 be one-way SCR and bidirectional triode thyristor all can, in order to reduce accompanying drawing quantity; The situation of only having drawn one-way SCR among the figure; VT1 preferably adopts highly sensitive controllable silicon, can use less trigger current just can trigger, to reduce the power of low-voltage DC source circuit; Reduce standby current, saves energy; Low-voltage DC source circuit 5 (comprises D5, D6, D7, D8, D9 by big resistance resistance R 2, voltage-stabiliser tube DW1, diode string; Can increase and decrease number in right amount by the needs of voltage height; Drawn 5 among the figure), electrochemical capacitor C1, ceramic disc capacitor C2 form, big resistance resistance R 2, voltage-stabiliser tube DW1, the series connection of diode string insert between the positive pole and negative pole (ground connection) of rectification circuit 3, generally speaking; But the R2 value is tens kilo-ohms arrives several megaohms; R2 is big more, the personal electric current of remote control switch is just more little, and the voltage stabilizing value of voltage-stabiliser tube DW1 is generally got several volts; Remote control switch main circuit 6 is made up of a slice digital integrated circuit CD4013, two triggers of CD4013, and one is connected into monostable circuit; One is connected into the bistable state integrated circuit; R3, C3 are the delay circuit of monostable circuit, make the monostable circuit delayed management, prepare for trigger next time; RG1 is photo resistance, forms bleeder circuit with R4.When holding state (when load 2 is not worked); Big resistance resistance R 2, voltage-stabiliser tube DW1, the series connection of diode string because big resistance resistance R 2 resistances are bigger, are got more voltage; Voltage-stabiliser tube DW1, diode string series connection back and remote control switch main circuit 6 be parallelly connected gets less voltage; This voltage forms the remote control switch auxiliary power supply, through electrochemical capacitor C1 low frequency filtering, supplies with remote control switch main circuit 6 behind the ceramic disc capacitor C2 High frequency filter; The tie point of R4 and RG1 connects trigger end 3 pin of CD4013, when RG1 by the moment of strong illumination, 3 pin of CD4013 obtain a high level pulse; Monostable circuit is triggered, and bistable circuit is triggered simultaneously, and 13 pin of CD4013 (supposing to be low level originally) output high level makes the controllable silicon VT1 conducting that is triggered through resistance R 1; Load 2 work after the VT1 conducting, are high voltages no longer just between the both positive and negative polarity of rectification circuit 3; Can't for remote control switch main circuit 6 working power be provided through big resistance resistance R 2; But the after-current of controllable silicon conducting at this moment flows through the diode string of being made up of D5, D6, D7, D8, D9, on the diode string, forms forward voltage drop, and this pressure drop is supplied with remote control switch main circuit 6 through voltage-stabiliser tube DW1; Making remote control switch main circuit 6 obtain normal voltage works on; When high light shone RG1 once more, circuit was got back to original state, not conducting of controllable silicon VT1; Load 2 is not worked, and the power supply of remote control switch main circuit 6 is again by voltage-stabiliser tube DW1, diode string and the operating voltage of the remote control switch main circuit 6 parallelly connected voltages of getting as remote control switch main circuit 6 in big resistance resistance R 2, voltage-stabiliser tube DW1, the diode string series circuit.Remote control switch main circuit 6 also can not use CD4013; Be connected into bistable circuit or be connected into bistable circuit with CD4017, NE555 with discrete component; The embodiment of this figure adopts laser to trigger; Also can use infrared receiver tube to realize infrared remote control, use wireless receiving module to realize radio remote control circuit, these all are the circuit of comparative maturity; Owing to present invention focuses on to realize a kind of two wires remote control switch and self-powered circuit that does not need transformer, below this reaches, no longer several kinds of remote control classifications detailed respectively in the narration.
In Fig. 2, be that with the difference of Fig. 1 use a diode D10 to replace the voltage stabilizing didoe DW1 among Fig. 1, other circuit does not change, the same can achieving the goal.Because adopted diode D10, when standby, big resistance resistance R 2 and remote control switch main circuit 6 dividing potential drops; Because the R2 resistance is bigger; Make remote control switch main circuit 6 minutes suitable operating voltage, when controllable silicon VT1 is triggered conducting, load 2 work; Forward dividing potential drop on the diode string is supplied with remote control switch main circuit 6 through diode D10, makes remote control switch main circuit 6 when load 2 work, still have enough supply voltages to guarantee the operate as normal of self.
In Fig. 3, be with the difference of Fig. 1, Fig. 2, use a resistance R 5 to replace the diode D10 among the voltage stabilizing didoe DW1 among Fig. 1, Fig. 2; Other circuit does not change, and the same can achieving the goal adopted resistance R 5; When standby, big resistance resistance R 2 and remote control switch main circuit 6, R5, diode string dividing potential drop are because the R2 resistance is bigger; Make remote control switch main circuit 6 minutes suitable voltage, when controllable silicon VT1 is triggered conducting, load 2 work; Forward dividing potential drop on diode string (the diode number will guarantee that at least remote control switch main circuit 6 obtains minimum operating voltage) is supplied with remote control switch main circuit 6 through resistance R 5; Make remote control switch main circuit 6 when load 2 work, still have enough supply voltages to guarantee the operate as normal of self,, make the dividing potential drop relation become complicated owing to the adding of resistance R 5; But the resistance of R2, R5 is selected suitably still can satisfy the requirement of 6 pairs of power supplys of remote control switch main circuit.
In Fig. 4, be with the difference of Fig. 1, use a voltage stabilizing didoe DW2 to replace the diode string among Fig. 1; Other circuit does not change, because adopted voltage stabilizing didoe DW2, when standby; R2 and remote control switch main circuit 6, the series circuit dividing potential drop of forming by DW1, DW2 because the R2 resistance is bigger, make remote control switch main circuit 6 minutes suitable voltage; When controllable silicon VT1 is triggered conducting; Load 2 work, the voltage of voltage regulation on voltage stabilizing didoe DW2 is supplied with remote control switch main circuit 6 through voltage-stabiliser tube DW1, makes remote control switch main circuit 6 when load 2 work, still have enough supply voltages to guarantee the operate as normal of self.
In Fig. 5, be with the difference of Fig. 2, use a voltage stabilizing didoe DW2 to replace the diode string among Fig. 2; Other circuit does not change, because adopted voltage stabilizing didoe DW2, when standby; R2 and remote control switch main circuit 6 dividing potential drops because the R2 resistance is bigger, make remote control switch main circuit 6 minutes suitable voltage; When controllable silicon VT1 is triggered conducting; Load 2 work, voltage is supplied with remote control switch main circuit 6 through diode D10 on voltage stabilizing didoe DW2, makes remote control switch main circuit 6 when load 2 work, still have enough supply voltages to guarantee the operate as normal of self.
In Fig. 6, be with the difference of Fig. 3, use a voltage stabilizing didoe DW2 to replace the diode string among Fig. 3; Other circuit does not change, because adopted voltage stabilizing didoe DW2, when standby; R2 and R5, voltage-stabiliser tube DW2, remote control switch main circuit 6 are formed bleeder circuits because the R2 resistance is bigger, make remote control switch main circuit 6 minutes suitable voltage; When controllable silicon VT1 is triggered conducting; Load 2 work, the voltage of voltage regulation on voltage stabilizing didoe DW2 is supplied with remote control switch main circuit 6 through too small resistance resistance R 5, makes remote control switch main circuit 6 when load 2 work, still have enough supply voltages to guarantee the operate as normal of self.
Through above technological innovation, two wires remote control switch power circuit is become succinctly, under the very little situation of bearing power, also can stably work, and with low cost.
Claims (10)
1. two wires remote control switch and self-powered circuit; Form by AC power (1), load (2), rectification circuit (3), reverse-blocking tetrode thyristor circuit (4), low-voltage DC source circuit (5), remote control switch main circuit (6); It is characterized in that: the anode A of the controllable silicon VT1 in the reverse-blocking tetrode thyristor circuit (4) or the first electrode T1 connect the positive pole of rectification circuit (3); The negative electrode K or the second electrode T2 insert in the low-voltage DC source circuit 5, and control utmost point G or gate pole G connect in the remote control switch main circuit (6) through resistance R 1.
2. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit; It is characterized in that: in low-voltage DC source circuit (5); The series circuit of being made up of big resistance resistance R 2, voltage-stabiliser tube DW1, diode string successively is connected between the positive pole and negative pole of rectification circuit (3); The diode string is connected by both positive and negative polarity by a plurality of diodes and forms, and the negative pole of the positive pole of diode string and silicon controlled negative electrode K or the second electrode T2, voltage-stabiliser tube DW1 links together the minus earth of diode string; The positive pole of capacitor C 1, C2 one termination voltage-stabiliser tube DW1, other end ground connection.
3. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit; It is characterized in that: in low-voltage DC source circuit (5); The series circuit of being made up of big resistance resistance R 2, diode D10, diode string successively is connected between the positive pole and negative pole of rectification circuit (3); The positive pole of the positive pole of diode string and silicon controlled negative electrode K or the second electrode T2, diode D10 links together; The minus earth of diode string, the negative pole of capacitor C 1, C2 one terminating diode D10, other end ground connection.
4. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit; It is characterized in that: in low-voltage DC source circuit (5); The series circuit of being made up of big resistance resistance R 2, little resistance resistance R 5, diode string successively is connected between the positive pole and negative pole of rectification circuit (3); The positive pole of diode string and silicon controlled negative electrode K or the second electrode T2, little resistance resistance R 5 link together; The minus earth of diode string, capacitor C 1, the little resistance resistance R 5 of C2 one termination, other end ground connection.
5. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit; It is characterized in that: in low-voltage DC source circuit (5); The series circuit of being made up of big resistance resistance R 2, voltage-stabiliser tube DW1, voltage-stabiliser tube DW2 successively is connected between the positive pole and negative pole of rectification circuit (3); The negative pole of the positive pole of voltage-stabiliser tube DW2 and silicon controlled negative electrode K or the second electrode T2, voltage-stabiliser tube DW1 links together; The minus earth of voltage-stabiliser tube DW2, the positive pole of capacitor C 1, C2 one termination voltage-stabiliser tube DW1, other end ground connection.
6. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit; It is characterized in that: in low-voltage DC source circuit (5); The series circuit of being made up of big resistance resistance R 2, diode D10, voltage-stabiliser tube successively is connected between the positive pole and negative pole of rectification circuit (3); The positive pole of the positive pole of voltage-stabiliser tube DW2 and silicon controlled negative electrode K or the second electrode T2, diode D10 links together; The minus earth of voltage-stabiliser tube DW2, the negative pole of capacitor C 1, C2 one terminating diode D10, other end ground connection.
7. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit; It is characterized in that: in low-voltage DC source circuit (5); The series circuit of being made up of big resistance resistance R 2, little resistance resistance R 5, voltage-stabiliser tube successively is connected between the positive pole and negative pole of rectification circuit (3); One end of the positive pole of voltage-stabiliser tube DW2 and silicon controlled negative electrode K or the second electrode T2, little resistance resistance R 5 links together; The minus earth of voltage-stabiliser tube DW2, the end of capacitor C 1, C2 one terminating resistor R5, other end ground connection.
8. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit is characterized in that: remote control switch main circuit (6) adds accessory circuit by a slice CD4013 and constitutes.
9. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit is characterized in that: remote control switch main circuit (6) adds accessory circuit by a slice CD4017 and constitutes.
10. a kind of two wires remote control switch as claimed in claim 1 and self-powered circuit is characterized in that: remote control switch main circuit (6) is triggered by wireless, infrared, laser respectively and constitutes wireless, infrared, laser remote-controlled switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203175226U CN202168055U (en) | 2011-08-29 | 2011-08-29 | Two-wire remote control switch and self-powered circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203175226U CN202168055U (en) | 2011-08-29 | 2011-08-29 | Two-wire remote control switch and self-powered circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202168055U true CN202168055U (en) | 2012-03-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203175226U Expired - Fee Related CN202168055U (en) | 2011-08-29 | 2011-08-29 | Two-wire remote control switch and self-powered circuit |
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| Country | Link |
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| CN (1) | CN202168055U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324921A (en) * | 2011-08-29 | 2012-01-18 | 任永斌 | Two-wire remote switch and self-powered circuit |
-
2011
- 2011-08-29 CN CN2011203175226U patent/CN202168055U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324921A (en) * | 2011-08-29 | 2012-01-18 | 任永斌 | Two-wire remote switch and self-powered circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20120829 |