CN201430578Y - Bias voltage circuit and electronic equipment - Google Patents
Bias voltage circuit and electronic equipment Download PDFInfo
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- CN201430578Y CN201430578Y CN2009201461512U CN200920146151U CN201430578Y CN 201430578 Y CN201430578 Y CN 201430578Y CN 2009201461512 U CN2009201461512 U CN 2009201461512U CN 200920146151 U CN200920146151 U CN 200920146151U CN 201430578 Y CN201430578 Y CN 201430578Y
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Abstract
The utility model discloses a bias voltage circuit and electronic equipment, which aim to resolve problems that the electronic equipment in the prior art utilizes integrated bias voltage generator chips which are high in price and cost. The bias voltage circuit comprises a power source and a voltage changing circuit, an input end of the voltage changing circuit is connected with a square wave output circuit, the voltage changing circuit comprises a negative voltage changing circuit and/or a positive voltage changing circuit, the positive voltage changing circuit comprises a fourth capacitor,a fifth diode and a sixth diode, one end of the fourth capacitor is connected with the square wave output circuit while the other end is connected with a cathode of the fifth diode, an anode of the fifth diode is connected to the power source, the other end of the fourth capacitor is simultaneously connected with an anode of the sixth diode, and a cathode of the sixth diode is connected to a positive voltage output end of the bias voltage circuit. Besides, a positive voltage output end of the bias voltage circuit is grounded after passing through a second stabilized voltage capacitor.
Description
Technical field
The utility model relates to power supply circuits, relates in particular to a kind of bias voltage circuit and electronic equipment.
Background technology
Present PDA (Personal Digital Assistant, the personal digital assistant) during operating handset, often need provide bias voltage for TFT-LCD (Thin Film Transistor Liquid CrystalDisplay, the Thin Film Transistor-LCD) screen that is installed on the mobile phone.In the prior art, the mode that bias voltage is provided produces chip for adopting integrated bias voltage, and as chips such as MAX1748 and AIC1880, they can realize positive and negative output of boosting, thereby provides bias voltage for the TFT-LCD screen.
But it is more expensive that integrated bias voltage produces chip price, increased the cost of mobile phone.
The utility model content
The utility model provides a kind of bias voltage circuit and electronic equipment, is used to reduce cost.
For achieving the above object, the utility model adopts following technical scheme:
A kind of bias voltage circuit comprises power supply and voltage conversion circuit, and the input of described voltage conversion circuit is connected with the square wave output circuit, and described voltage conversion circuit comprises negative voltage translation circuit and/or positive voltage translation circuit, wherein,
Described negative voltage translation circuit comprises first electric capacity, second electric capacity, the 3rd electric capacity, first diode, second diode, the 3rd diode, the 4th diode and first electric capacity of voltage regulation;
One end of described first electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described first diode, the minus earth of described first diode; The other end of described first electric capacity links to each other with the negative pole of described second diode simultaneously, and the positive pole of described second diode is ground connection behind described second electric capacity;
One end of described the 3rd electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described the 3rd diode, and the negative pole of described the 3rd diode is connected to the positive pole of described second diode; The other end of described the 3rd electric capacity links to each other with the negative pole of described the 4th diode simultaneously, and the positive pole of described the 4th diode is connected to the negative voltage output of described bias voltage circuit;
The negative voltage output of described bias voltage circuit is ground connection behind described first electric capacity of voltage regulation also;
Described positive voltage translation circuit comprises the 4th electric capacity, the 5th diode, the 6th diode and second electric capacity of voltage regulation;
One end of described the 4th electric capacity links to each other with described square wave output circuit, and the other end links to each other with the negative pole of described the 5th diode, and the positive pole of described the 5th diode is connected to described power supply; The other end of described the 4th electric capacity links to each other with the positive pole of described the 6th diode simultaneously, and the negative pole of described the 6th diode is connected to the positive voltage output end of described bias voltage circuit;
The positive voltage output end of described bias voltage circuit is ground connection behind described second electric capacity of voltage regulation also.
A kind of electronic equipment comprises bias voltage circuit, and described bias voltage circuit comprises power supply and voltage conversion circuit, the input of described voltage conversion circuit is connected with the square wave output circuit, described voltage conversion circuit comprises negative voltage translation circuit and/or positive voltage translation circuit, wherein
Described negative voltage translation circuit comprises first electric capacity, second electric capacity, the 3rd electric capacity, first diode, second diode, the 3rd diode, the 4th diode and first electric capacity of voltage regulation;
One end of described first electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described first diode, the minus earth of described first diode; The other end of described first electric capacity links to each other with the negative pole of described second diode simultaneously, and the positive pole of described second diode is ground connection behind described second electric capacity;
One end of described the 3rd electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described the 3rd diode, and the negative pole of described the 3rd diode is connected to the positive pole of described second diode; The other end of described the 3rd electric capacity links to each other with the negative pole of described the 4th diode simultaneously, and the positive pole of described the 4th diode is connected to the negative voltage output of described bias voltage circuit;
The negative voltage output of described bias voltage circuit is ground connection behind described first electric capacity of voltage regulation also;
Described positive voltage translation circuit comprises the 4th electric capacity, the 5th diode, the 6th diode and second electric capacity of voltage regulation;
One end of described the 4th electric capacity links to each other with described square wave output circuit, and the other end links to each other with the negative pole of described the 5th diode, and the positive pole of described the 5th diode is connected to described power supply; The other end of described the 4th electric capacity links to each other with the positive pole of described the 6th diode simultaneously, and the negative pole of described the 6th diode is connected to the positive voltage output end of described bias voltage circuit;
The positive voltage output end of described bias voltage circuit is ground connection behind described second electric capacity of voltage regulation also.
In the bias voltage circuit and electronic equipment that the utility model provides, the square wave output circuit is used to generate square-wave signal, and voltage conversion circuit is used to utilize the square-wave signal that is generated to realize positive and negative output of boosting.The utility model has utilized capacitance voltage not suddenly change and the characteristic of diode unilateal conduction, and principle is simple, and is with low cost.
Description of drawings
The circuit connection diagram of the bias voltage circuit embodiment that Fig. 1 provides for the utility model;
Fig. 2 is the circuit connection diagram after the positive voltage circuit part in the circuit shown in Figure 1 is expanded;
Fig. 3 is the circuit connection diagram after the negative voltage circuit part in the circuit shown in Figure 1 is expanded;
Fig. 4 is a circuit connection diagram behind the access buffer circuit in circuit shown in Figure 1.
Embodiment
Electronic equipment uses integrated bias voltage to produce chip in the prior art in order to solve, and price is expensive, the problem that cost is high, and the utility model provides a kind of bias voltage circuit and electronic equipment.Below in conjunction with accompanying drawing the utility model is described in detail.
The utility model provides a kind of bias voltage circuit, and as shown in Figure 1, it comprises power supply VCC and voltage conversion circuit 1, the input of voltage conversion circuit 1 is connected with square wave output circuit 2, voltage conversion circuit 1 comprises negative voltage translation circuit 11 and positive voltage translation circuit 12, wherein
Negative voltage translation circuit 11 comprises first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 and the first electric capacity of voltage regulation C15;
One end of first capacitor C 1 links to each other with square wave output circuit 2, and the other end links to each other with the positive pole of the first diode D1, the minus earth of the first diode D1; The other end of first capacitor C 1 links to each other with the negative pole of the second diode D2 simultaneously, and the positive pole of the second diode D2 is ground connection after second capacitor C 2;
One end of the 3rd capacitor C 3 links to each other with square wave output circuit 2, and the other end links to each other with the positive pole of the 3rd diode D3, and the negative pole of the 3rd diode D3 is connected to the positive pole of the second diode D2; The other end of the 3rd capacitor C 3 links to each other with the negative pole of the 4th diode D4 simultaneously, and the positive pole of the 4th diode D4 is connected to the negative voltage output of bias voltage circuit;
The negative voltage output of bias voltage circuit is ground connection behind the first electric capacity of voltage regulation C15 also;
Positive voltage translation circuit 12 comprises the 4th capacitor C 4, the 5th diode D5, the 6th diode D6 and the second electric capacity of voltage regulation C16;
One end of the 4th capacitor C 4 links to each other with square wave output circuit 2, and the other end links to each other with the negative pole of the 5th diode D5, and the positive pole of the 5th diode D5 is connected to power supply VCC; The other end of the 4th capacitor C 4 links to each other with the positive pole of the 6th diode D6 simultaneously, and the negative pole of the 6th diode D6 is connected to the positive voltage output end of bias voltage circuit;
The positive voltage output end of bias voltage circuit is ground connection behind the second electric capacity of voltage regulation C16 also.
In the bias voltage circuit that the utility model provides, square wave output circuit 2 is used to generate square-wave signal, and voltage conversion circuit 1 is used to utilize the square-wave signal that is generated to realize positive and negative output of boosting.The utility model has utilized capacitance voltage not suddenly change and the characteristic of diode unilateal conduction, and principle is simple, and is with low cost.
Describe operation principle of the present utility model below in detail:
Among Fig. 1, square wave output circuit 2 generates square-wave signal, and this square-wave signal outputs to the input of voltage conversion circuit 1.Herein, the high level of supposing the square-wave signal of generation is 5V, and low level is 0V.
For negative voltage translation circuit 11, when square-wave signal was high level, electric current made C1, C3 both end voltage all reach 5V to first capacitor C 1 and 3 chargings of the 3rd capacitor C; After square-wave signal became low level, the first diode D1 ended, and first capacitor C, 1 left side current potential becomes 0V, because capacitance voltage can not suddenly change, thus the right current potential of first capacitor C 1 become-5V, at this moment, the second diode D2 conducting becomes the current potential of second capacitor C 2-5V; After square-wave signal becomes high level once more,, thereby make the voltage of the 3rd capacitor C 3 be charged to 10V because the current potential of second capacitor C 2 is-5V; After square-wave signal became low level again, the 3rd capacitor C 3 the right current potentials just became-10V, again behind the pressure stabilization function through the first electric capacity of voltage regulation C15, can externally provide-voltage of 10V.
For positive voltage translation circuit 12, when square-wave signal was low level, power supply VCC made its both end voltage reach 5V (the right current potential height of C4) to 4 chargings of the 4th capacitor C; After square-wave signal became high level, the 4th capacitor C 4 the right voltages were lifted to 10V, again behind the pressure stabilization function through the second electric capacity of voltage regulation C16, can externally provide+voltage of 10V.
In the present embodiment, both comprise negative voltage translation circuit 11, comprised positive voltage translation circuit 12 again.During concrete the application, can negative voltage translation circuit 11 or positive voltage translation circuit 12 only be set in circuit according to the needs of actual conditions.
In addition, negative voltage translation circuit 11 in the present embodiment externally provides-voltage of 10V, positive voltage translation circuit 12 externally provides+voltage of 10V, and other big or small voltages then can be expanded circuit shown in Figure 1 according to principle of the present utility model if desired.Shown in Figure 2, promptly be that positive voltage translation circuit 12 parts among Fig. 1 are expanded, thereby positive voltage translation circuit 12 can externally be provided+voltage of 15V.
As shown in Figure 2, the positive voltage translation circuit after the expansion also comprises the 5th capacitor C 5, the 6th capacitor C 6, the 7th diode D7 and the 8th diode D8, wherein,
The 7th diode D7 and the 8th diode D8 are connected between power supply VCC and the 5th diode D5, the positive pole of the 7th diode D7 links to each other with power supply VCC, the negative pole of the 7th diode D7 links to each other with the positive pole of the 8th diode D8, the negative pole of the 8th diode D8 links to each other with the positive pole of the 5th diode D5, and the negative pole of the 8th diode D8 is ground connection after the 6th capacitor C 6 simultaneously;
One end of the 5th capacitor C 5 links to each other with square wave output circuit 2, and the other end links to each other with the negative pole of the 7th diode D7.
The operation principle of circuit shown in Figure 2 is as follows:
When square-wave signal was low level, power supply VCC made C4, C5 both end voltage all reach 5V (the right current potential height) to the 4th capacitor C 4 and 5 chargings of the 5th capacitor C; After square-wave signal became high level, the 5th capacitor C 5 the right voltages were lifted to 10V, thereby the both end voltage of the 6th capacitor C 6 is charged to 10V; After square-wave signal became low level again, the 4th capacitor C 4 the right voltages were lifted to 15V, behind the pressure stabilization function through the second electric capacity of voltage regulation C16, thereby externally provided+voltage of 15V.
In like manner, the negative voltage translation circuit also can be expanded, thereby it is externally provided-voltage of 15V.Shown in Figure 3, promptly be to the circuit connection diagram after the negative voltage translation circuit 11 parts expansion among Fig. 1.
As shown in Figure 3, the negative voltage translation circuit also comprises the tenth capacitor C 10, the tenth capacitor C 11, the tenth diode D10 and the 11 diode D11, wherein,
The end of C11 links to each other with the square wave output circuit, and the other end links to each other with the positive pole of D10, and the negative pole of D10 links to each other with the positive pole of D4; The other end of C11 links to each other with the negative pole of D11 simultaneously, and the positive pole of D11 is connected to the negative voltage output of bias voltage circuit.
Since identical among the operation principle of circuit shown in Figure 3 and Fig. 1, so locate to repeat no more its course of work.
As from the foregoing, bias voltage circuit of the present utility model can be expanded as required flexibly, and the bias voltage of high level voltage integral multiple externally is provided.In addition, the utility model can also pass through to change the size of square-wave signal high level voltage, thereby realizes the voltage output of different numerical value.
In the utility model, the square wave output circuit is used to generate square-wave signal, and it is those skilled in the art's a common technology, and taking a single example is below illustrated, for other attainable situations, does not give unnecessary details one by one herein.
As shown in Figure 1, square wave output circuit 2 comprises the first inverter U1, first resistance R 1 and the 7th capacitor C 7, wherein,
The power end of the first inverter U1 (pin 5) links to each other with power supply VCC, earth terminal (pin 3) ground connection;
The input of the first inverter U1 (pin two) is ground connection after the 7th capacitor C 7, and output (pin 4) is connected to the input of the first inverter U1 after first resistance R 1.The pin one of the first inverter U1 is a reference edge among Fig. 1, unsettled getting final product.
Square wave output circuit shown in Figure 1 can be realized the output of square-wave signal preferably.
In addition, in order to strengthen the driving force of bias voltage circuit, as shown in Figure 4, bias voltage circuit can also comprise buffer circuit 3, and buffer circuit 3 is connected between square wave output circuit 2 and the voltage conversion circuit 1.Buffer circuit 3 can cushion the square-wave signal of square wave output circuit 2 outputs, thus the driving force of intensifier circuit.
During concrete enforcement, buffer circuit 3 can adopt following circuit form:
As shown in Figure 4, buffer circuit 3 comprises the second inverter U2, second resistance R 2 and the 3rd resistance R 3, wherein,
The power end of the second inverter U2 (pin 5) links to each other with power supply VCC, earth terminal (pin 3) ground connection;
The input of the second inverter U2 (pin two) links to each other with the output of the first inverter U1 after second resistance R 2, and the output of the second inverter U2 (pin 4) links to each other with the input of voltage conversion circuit after the 3rd resistance R 3.The pin one of the second inverter U2 is similarly reference edge among Fig. 4, unsettled getting final product.
In this buffer circuit 3, R2 can play the impedance matching effect between square wave output circuit 2 and the buffer circuit 3, and U2 and R3 can cushion the square-wave signal of square wave output circuit 2 outputs, thereby strengthens the driving force of whole bias voltage circuit.
To sum up, bias voltage circuit of the present utility model is based on oscillating circuit, utilized capacitance voltage not suddenly change and the characteristic of diode unilateal conduction, realized the output of bias voltage.The utility model principle is simple, with low cost, thereby it can be by the many groups of the size output required voltages of simple expansion or change power supply.In addition, each device can adopt the discrete device form in the utility model, thereby reduces area shared on the circuit board.
The output current of the utility model bias voltage circuit is less, be applicable to the application scenario that does not need big electric current, for example, for the TFT-LCD screen on the mobile phone provides bias voltage (the needed bias voltage of TFT-LCD screen is the MOSFET circuit grid power supply to its inside, does not need big electric current).
Corresponding with the bias voltage circuit of the foregoing description, the utility model also provides a kind of electronic equipment, it comprises bias voltage circuit, as shown in Figure 1, bias voltage circuit comprises power supply VCC and voltage conversion circuit 1, and the input of voltage conversion circuit 1 is connected with square wave output circuit 2, and voltage conversion circuit 1 comprises negative voltage translation circuit 11 and positive voltage translation circuit 12, wherein
Negative voltage translation circuit 11 comprises first capacitor C 1, second capacitor C 2, the 3rd capacitor C 3, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4 and the first electric capacity of voltage regulation C15;
One end of first capacitor C 1 links to each other with square wave output circuit 2, and the other end links to each other with the positive pole of the first diode D1, the minus earth of the first diode D1; The other end of first capacitor C 1 links to each other with the negative pole of the second diode D2 simultaneously, and the positive pole of the second diode D2 is ground connection after second capacitor C 2;
One end of the 3rd capacitor C 3 links to each other with square wave output circuit 2, and the other end links to each other with the positive pole of the 3rd diode D3, and the negative pole of the 3rd diode D3 is connected to the positive pole of the second diode D2; The other end of the 3rd capacitor C 3 links to each other with the negative pole of the 4th diode D4 simultaneously, and the positive pole of the 4th diode D4 is connected to the negative voltage output of bias voltage circuit;
The negative voltage output of bias voltage circuit is ground connection behind the first electric capacity of voltage regulation C15 also;
Positive voltage translation circuit 12 comprises the 4th capacitor C 4, the 5th diode D5, the 6th diode D6 and the second electric capacity of voltage regulation C16;
One end of the 4th capacitor C 4 links to each other with square wave output circuit 2, and the other end links to each other with the negative pole of the 5th diode D5, and the positive pole of the 5th diode D5 is connected to power supply VCC; The other end of the 4th capacitor C 4 links to each other with the positive pole of the 6th diode D6 simultaneously, and the negative pole of the 6th diode D6 is connected to the positive voltage output end of bias voltage circuit;
The positive voltage output end of bias voltage circuit is ground connection behind the second electric capacity of voltage regulation C16 also.
In the electronic equipment that the utility model provides, square wave output circuit 2 is used to generate square-wave signal, and voltage conversion circuit 1 is used to utilize the square-wave signal that is generated to realize positive and negative output of boosting.The utility model has utilized capacitance voltage not suddenly change and the characteristic of diode unilateal conduction, and principle is simple, and is with low cost.
For the positive voltage translation circuit can externally be provided+voltage of 15V, can expand positive voltage translation circuit among Fig. 1.As shown in Figure 2, the positive voltage translation circuit after the expansion also comprises the 5th capacitor C 5, the 6th capacitor C 6, the 7th diode D7 and the 8th diode D8, wherein,
The 7th diode D7 and the 8th diode D8 are connected between power supply VCC and the 5th diode D5, the positive pole of the 7th diode D7 links to each other with power supply VCC, the negative pole of the 7th diode D7 links to each other with the positive pole of the 8th diode D8, the negative pole of the 8th diode D8 links to each other with the positive pole of the 5th diode D5, and the negative pole of the 8th diode D8 is ground connection after the 6th capacitor C 6 simultaneously;
One end of the 5th capacitor C 5 links to each other with square wave output circuit 2, and the other end links to each other with the negative pole of the 7th diode D7.
In the utility model, in order to realize the output of square-wave signal preferably, the square wave output circuit can adopt following circuit form:
As shown in Figure 1, square wave output circuit 2 comprises the first inverter U1, first resistance R 1 and the 7th capacitor C 7, wherein,
The power end of the first inverter U1 (pin 5) links to each other with power supply VCC, earth terminal (pin 3) ground connection; The input of the first inverter U1 (pin two) is ground connection after the 7th capacitor C 7, and output (pin 3) is connected to the input of the first inverter U1 after first resistance R 1.The pin one of the first inverter U1 is a reference edge among Fig. 1, unsettled getting final product.
In addition, in order to strengthen the driving force of bias voltage circuit, as shown in Figure 4, bias voltage circuit can also comprise buffer circuit 3, and buffer circuit 3 is connected between square wave output circuit 2 and the voltage conversion circuit 1.Buffer circuit 3 can cushion the square-wave signal of square wave output circuit 2 outputs, thus the driving force of intensifier circuit.
During concrete enforcement, buffer circuit 3 can adopt following circuit form:
As shown in Figure 4, buffer circuit 3 comprises the second inverter U2, second resistance R 2 and the 3rd resistance R 3, wherein,
The power end of the second inverter U2 (pin 5) links to each other with power supply VCC, earth terminal (pin 3) ground connection; The input of the second inverter U2 (pin two) links to each other with the output of the first inverter U1 after second resistance R 2, and the output of the second inverter U2 (pin 4) links to each other with the input of voltage conversion circuit after the 3rd resistance R 3.The pin one of the second inverter U2 is similarly reference edge among Fig. 4, unsettled getting final product.
To sum up, the bias voltage circuit in the utility model electronic equipment is based on oscillating circuit, utilized capacitance voltage not suddenly change and the characteristic of diode unilateal conduction, realized the output of bias voltage.The utility model principle is simple, with low cost, thereby it can be by the many groups of the size output required voltages of simple expansion or change power supply.In addition, each device can adopt the discrete device form in the utility model, thereby reduces area shared on the circuit board.
Bias voltage circuit output current in the utility model electronic equipment is less, electronic equipment of the present utility model can be for not needing any electronic equipment of big electric current, for example, the mobile phone, the equipment such as MP3, MP4 that have the TFT-LCD screen, wherein, bias voltage circuit provides bias voltage for the TFT-LCD screen.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (10)
1, a kind of bias voltage circuit is characterized in that, comprises power supply and voltage conversion circuit, and the input of described voltage conversion circuit is connected with the square wave output circuit, and described voltage conversion circuit comprises negative voltage translation circuit and/or positive voltage translation circuit, wherein,
Described negative voltage translation circuit comprises first electric capacity, second electric capacity, the 3rd electric capacity, first diode, second diode, the 3rd diode, the 4th diode and first electric capacity of voltage regulation;
One end of described first electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described first diode, the minus earth of described first diode; The other end of described first electric capacity links to each other with the negative pole of described second diode simultaneously, and the positive pole of described second diode is ground connection behind described second electric capacity;
One end of described the 3rd electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described the 3rd diode, and the negative pole of described the 3rd diode is connected to the positive pole of described second diode; The other end of described the 3rd electric capacity links to each other with the negative pole of described the 4th diode simultaneously, and the positive pole of described the 4th diode is connected to the negative voltage output of described bias voltage circuit;
The negative voltage output of described bias voltage circuit is ground connection behind described first electric capacity of voltage regulation also;
Described positive voltage translation circuit comprises the 4th electric capacity, the 5th diode, the 6th diode and second electric capacity of voltage regulation;
One end of described the 4th electric capacity links to each other with described square wave output circuit, and the other end links to each other with the negative pole of described the 5th diode, and the positive pole of described the 5th diode is connected to described power supply; The other end of described the 4th electric capacity links to each other with the positive pole of described the 6th diode simultaneously, and the negative pole of described the 6th diode is connected to the positive voltage output end of described bias voltage circuit;
The positive voltage output end of described bias voltage circuit is ground connection behind described second electric capacity of voltage regulation also.
2, bias voltage circuit according to claim 1 is characterized in that, described positive voltage translation circuit also comprises the 5th electric capacity, the 6th electric capacity, the 7th diode and the 8th diode, wherein,
Described the 7th diode and the 8th diode are connected between described power supply and the 5th diode, the positive pole of described the 7th diode links to each other with described power supply, the negative pole of described the 7th diode links to each other with the positive pole of described the 8th diode, the negative pole of described the 8th diode links to each other with the positive pole of described the 5th diode, and the negative pole of described the 8th diode is ground connection behind described the 6th electric capacity simultaneously;
One end of described the 5th electric capacity links to each other with described square wave output circuit, and the other end links to each other with the negative pole of described the 7th diode.
3, bias voltage circuit according to claim 1 and 2 is characterized in that, described square wave output circuit comprises first inverter, first resistance and the 7th electric capacity, wherein,
The power end of described first inverter links to each other with described power supply, earth terminal ground connection;
The input of described first inverter is ground connection behind described the 7th electric capacity, and output is connected to the input of described first inverter behind described first resistance; The output of described first inverter links to each other with the input of described voltage conversion circuit simultaneously.
4, bias voltage circuit according to claim 3 is characterized in that, described bias voltage circuit also comprises buffer circuit, and described buffer circuit is connected between described square wave output circuit and the voltage conversion circuit.
5, bias voltage circuit according to claim 4 is characterized in that, described buffer circuit comprises second inverter, second resistance and the 3rd resistance, wherein,
The power end of described second inverter links to each other with described power supply, earth terminal ground connection;
The input of described second inverter links to each other with the output of described first inverter behind described second resistance, and output links to each other with the input of described voltage conversion circuit behind described the 3rd resistance.
6, a kind of electronic equipment, comprise bias voltage circuit, it is characterized in that, described bias voltage circuit comprises power supply and voltage conversion circuit, the input of described voltage conversion circuit is connected with the square wave output circuit, described voltage conversion circuit comprises negative voltage translation circuit and/or positive voltage translation circuit, wherein
Described negative voltage translation circuit comprises first electric capacity, second electric capacity, the 3rd electric capacity, first diode, second diode, the 3rd diode, the 4th diode and first electric capacity of voltage regulation;
One end of described first electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described first diode, the minus earth of described first diode; The other end of described first electric capacity links to each other with the negative pole of described second diode simultaneously, and the positive pole of described second diode is ground connection behind described second electric capacity;
One end of described the 3rd electric capacity links to each other with described square wave output circuit, and the other end links to each other with the positive pole of described the 3rd diode, and the negative pole of described the 3rd diode is connected to the positive pole of described second diode; The other end of described the 3rd electric capacity links to each other with the negative pole of described the 4th diode simultaneously, and the positive pole of described the 4th diode is connected to the negative voltage output of described bias voltage circuit;
The negative voltage output of described bias voltage circuit is ground connection behind described first electric capacity of voltage regulation also;
Described positive voltage translation circuit comprises the 4th electric capacity, the 5th diode, the 6th diode and second electric capacity of voltage regulation;
One end of described the 4th electric capacity links to each other with described square wave output circuit, and the other end links to each other with the negative pole of described the 5th diode, and the positive pole of described the 5th diode is connected to described power supply; The other end of described the 4th electric capacity links to each other with the positive pole of described the 6th diode simultaneously, and the negative pole of described the 6th diode is connected to the positive voltage output end of described bias voltage circuit;
The positive voltage output end of described bias voltage circuit is ground connection behind described second electric capacity of voltage regulation also.
7, electronic equipment according to claim 6 is characterized in that, described positive voltage translation circuit also comprises the 5th electric capacity, the 6th electric capacity, the 7th diode and the 8th diode, wherein,
Described the 7th diode and the 8th diode are connected between described power supply and the 5th diode, the positive pole of described the 7th diode links to each other with described power supply, the negative pole of described the 7th diode links to each other with the positive pole of described the 8th diode, the negative pole of described the 8th diode links to each other with the positive pole of described the 5th diode, and the negative pole of described the 8th diode is ground connection behind described the 6th electric capacity simultaneously;
One end of described the 5th electric capacity links to each other with described square wave output circuit, and the other end links to each other with the negative pole of described the 7th diode.
According to claim 6 or 7 described electronic equipments, it is characterized in that 8, described square wave output circuit comprises first inverter, first resistance and the 7th electric capacity, wherein,
The power end of described first inverter links to each other with described power supply, earth terminal ground connection;
The input of described first inverter is ground connection behind described the 7th electric capacity, and output is connected to the input of described first inverter behind described first resistance; The output of described first inverter links to each other with the input of described voltage conversion circuit simultaneously.
9, electronic equipment according to claim 8 is characterized in that, described bias voltage circuit also comprises buffer circuit, and described buffer circuit is connected between described square wave output circuit and the voltage conversion circuit.
10, electronic equipment according to claim 9 is characterized in that, described buffer circuit comprises second inverter, second resistance and the 3rd resistance, wherein,
The power end of described second inverter links to each other with described power supply, earth terminal ground connection;
The input of described second inverter links to each other with the output of described first inverter behind described second resistance, and output links to each other with the input of described voltage conversion circuit behind described the 3rd resistance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201461512U CN201430578Y (en) | 2009-03-26 | 2009-03-26 | Bias voltage circuit and electronic equipment |
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| CN2009201461512U CN201430578Y (en) | 2009-03-26 | 2009-03-26 | Bias voltage circuit and electronic equipment |
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| CN201430578Y true CN201430578Y (en) | 2010-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009201461512U Expired - Fee Related CN201430578Y (en) | 2009-03-26 | 2009-03-26 | Bias voltage circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201430578Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682203A (en) * | 2015-03-13 | 2015-06-03 | 温州大学城市学院 | Ignition circuit of separately-excited arc lighter |
| WO2017041331A1 (en) * | 2015-09-09 | 2017-03-16 | 深圳市华星光电技术有限公司 | Drive circuit and liquid crystal display apparatus |
| CN108447434A (en) * | 2018-03-20 | 2018-08-24 | 京东方科技集团股份有限公司 | A kind of negative pressure output circuit and display panel |
-
2009
- 2009-03-26 CN CN2009201461512U patent/CN201430578Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104682203A (en) * | 2015-03-13 | 2015-06-03 | 温州大学城市学院 | Ignition circuit of separately-excited arc lighter |
| WO2017041331A1 (en) * | 2015-09-09 | 2017-03-16 | 深圳市华星光电技术有限公司 | Drive circuit and liquid crystal display apparatus |
| CN108447434A (en) * | 2018-03-20 | 2018-08-24 | 京东方科技集团股份有限公司 | A kind of negative pressure output circuit and display panel |
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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: 20100324 Termination date: 20130326 |