CN100553089C - Power supply device - Google Patents
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- CN100553089C CN100553089C CN 200610031020 CN200610031020A CN100553089C CN 100553089 C CN100553089 C CN 100553089C CN 200610031020 CN200610031020 CN 200610031020 CN 200610031020 A CN200610031020 A CN 200610031020A CN 100553089 C CN100553089 C CN 100553089C
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Abstract
Power supply device is used to provide the DC power supply of fixed polarity output, comprises first input end, second input, first output, second output, first switch element, second switch unit, the 3rd switch element and the 4th switch element.Each switch element comprises with the transistor of kenel and diode.Wherein, the transistor of first and second switch element is coupled to first input end, second input and first output; The transistor of the 3rd switch element is coupled to the first input end and second output; The transistor of the 4th switch element is coupled to second input and second output.Diode is respectively coupled on the transistor.When the input reversing of the first input end and second input, first output and second output have the output of fixed polarity.
Description
Technical field
The invention relates to a kind of power supply device, and particularly relevant for a kind of DC power supply that fixed polarity output is provided.
Background technology
Portable DC power supply, for example, the battery type power supply device is in the use because factor such as easy to carry under the little environment of some voltage requirements, has characteristic easily.Yet, when user's desire inputs to power supply device with DC power supply, need with the positive-negative polarity of direct-current input power supplying correct respectively be connected to default positive voltage limit and negative voltage limit, cause no-output voltage to avoid because of the incorrect polarity of DC input voitage, or because the direct voltage polarity of input causes opposite output polarity mutually on the contrary, and then cause DC power supply or connect the damage of the equipment of DC power supply so far.
Therefore, need one can accept the DC input voitage of any positive-negative polarity, and produce the fixedly DC power supply of the voltage output of positive-negative polarity.
Summary of the invention
Purpose of the present invention is providing a kind of DC power supply exactly, can accept the direct voltage input of any positive-negative polarity, and produces the fixedly direct voltage output of positive-negative polarity.
According to above-mentioned purpose, the present invention proposes a kind of fixedly power supply device of the direct voltage output of positive-negative polarity that has, and comprises a first input end and one second input, in order to input voltage; Wherein, the input voltage of the first input end and second input has opposite polarity; One first output and one second output are in order to output voltage; One first switch element; One second switch unit; One the 3rd switch element; And one the 4th switch element.Each switch element comprises with a transistor of kenel and a diode.Wherein, the transistor of first and second switch element is coupled to first input end, second input and first output; The transistor of the 3rd switch element is coupled to the first input end and second output; The transistor of the 4th switch element is coupled to second input and second output.Diode is respectively coupled on the transistor.When the input reversing of the first input end and second input, first output and second output have the output of fixed polarity.
According to power supply device of the present invention, wherein transistorized kenel can be P transistor npn npn or N transistor npn npn.
According to power supply device of the present invention, wherein, when transistorized kenel is the P transistor npn npn, the grid of the first transistor couples second input, the drain electrode of the first transistor couples first input end, the source electrode of the first transistor couples first output, and the negative electrode of first diode couples the source electrode of the first transistor, and the anode of first diode couples the drain electrode of the first transistor.
The grid of transistor seconds couples first input end, the drain electrode of transistor seconds couples second input, the source electrode of transistor seconds couples first output, and the negative electrode of second diode couples the source electrode of transistor seconds, and the anode of second diode couples the drain electrode of transistor seconds.
The 3rd transistorized grid couples first input end, the 3rd transistor drain couples one second output, the 3rd transistorized source electrode couples first input end, and the negative electrode of the 3rd diode couples the 3rd transistorized source electrode, and the anode of the 3rd diode couples the 3rd transistor drain.
The 4th transistorized grid couples second input, the 4th transistor drain couples second output, the 4th transistorized source electrode couples second input, and the negative electrode of the 4th diode couples the 4th transistorized source electrode, and the anode of the 4th diode couples the 4th transistor drain.
When first input end is that the positive voltage and second input are when being negative voltage, or when first input end be that the negative voltage and second input are when being positive voltage, it is positive voltage that the output voltage of power supply device is fixed as first output, and second output is a negative voltage.
According to power supply device of the present invention, wherein, when transistorized kenel is the N transistor npn npn, the grid of the first transistor couples second input, the drain electrode of the first transistor couples first input end, the source electrode of the first transistor couples first output, and the anode of first diode couples the source electrode of the first transistor, and the negative electrode of first diode couples the drain electrode of the first transistor.
The grid of transistor seconds couples first input end, the drain electrode of transistor seconds couples second input, the source electrode of transistor seconds couples first output, and the anode of second diode couples the source electrode of transistor seconds, and the negative electrode of second diode couples the drain electrode of transistor seconds.
The 3rd transistorized grid couples first input end, the 3rd transistor drain couples one second output, the 3rd transistorized source electrode couples first input end, and the anode of the 3rd diode couples the 3rd transistorized source electrode, and the negative electrode of the 3rd diode couples the 3rd transistor drain.
The 4th transistorized grid couples second input, the 4th transistor drain couples second output, the 4th transistorized source electrode couples second input, and the anode of the 4th diode couples the 4th transistorized source electrode, and the negative electrode of the 4th diode couples the 4th transistor drain.
When first input end is that the positive voltage and second input are when being negative voltage, or when first input end be that the negative voltage and second input are when being positive voltage, it is negative voltage that the output voltage of power supply device is fixed as first output, and second output is a positive voltage.
According to above-mentioned purpose, the present invention proposes a kind of power supply device with fixedly direct voltage output of positive-negative polarity in addition and comprises a first input end and one second input, in order to input voltage; Wherein, the input voltage of the first input end and second input has opposite polarity; One first output and one second output are in order to output voltage; One first switch element; One second switch unit; One the 3rd switch element; And one the 4th switch element.
Wherein, first switch element, comprise one first diode and one the one P transistor npn npn, wherein the grid of a P transistor npn npn couples second input, the drain electrode of the one P transistor npn npn couples first input end, the source electrode of the one P transistor npn npn couples first output, and the negative electrode of first diode couples the source electrode of a P transistor npn npn, and the anode of first diode couples the drain electrode of a P transistor npn npn.
The second switch unit, comprise one second diode and one the 2nd P transistor npn npn, wherein the grid of the 2nd P transistor npn npn couples first input end, the drain electrode of the 2nd P transistor npn npn couples second input, the source electrode of the 2nd P transistor npn npn couples first output, the negative electrode of second diode couples the source electrode of the 2nd P transistor npn npn, and the anode of second diode couples the drain electrode of the 2nd P transistor npn npn.
The 3rd switch element, comprise one the 3rd diode and one the 3rd P transistor npn npn, wherein the grid of the 3rd P transistor npn npn couples first input end, the drain electrode of the 3rd P transistor npn npn couples second output, the source electrode of the 3rd P transistor npn npn couples first input end, the negative electrode of the 3rd diode couples the source electrode of the 3rd P transistor npn npn, and the anode of the 3rd diode couples the drain electrode of the 3rd P transistor npn npn.
The 4th switch element, comprise one the 4th diode and one the 4th P transistor npn npn, wherein the grid of the 4th P transistor npn npn couples second input, the drain electrode of the 4th P transistor npn npn couples second output, the source electrode of the 4th P transistor npn npn couples second input, the negative electrode of the 4th diode couples the source electrode of the 4th P transistor npn npn, and the anode of the 4th diode couples the drain electrode of the 4th P transistor npn npn.
Wherein, when first input end is that the positive voltage and second input are when being negative voltage, or when first input end be the negative voltage and second input when being positive voltage, it is positive voltage that the output voltage of power supply device is fixed as first output, and second output is a negative voltage.
According to above-mentioned purpose, the present invention proposes a kind of power supply device with fixedly direct voltage output of positive-negative polarity again and comprises a first input end and one second input, in order to input voltage; Wherein, the input voltage of the first input end and second input has opposite polarity; One first output and one second output are in order to output voltage; One first switch element; One second switch unit; One the 3rd switch element; And one the 4th switch element.
Wherein, first switch element, comprise one first diode and one the one N transistor npn npn, wherein the grid of a N transistor npn npn couples one second input, the drain electrode of the one N transistor npn npn couples a first input end, the source electrode of the one N transistor npn npn couples one first output, and the anode of first diode couples the source electrode of a N transistor npn npn, and the negative electrode of first diode couples the drain electrode of a N transistor npn npn.
The second switch unit, comprise one second diode and one the 2nd N transistor npn npn, wherein the grid of the 2nd N transistor npn npn couples first input end, the drain electrode of the 2nd N transistor npn npn couples second input, the source electrode of the 2nd N transistor npn npn couples first output, the anode of second diode couples the source electrode of the 2nd N transistor npn npn, and the negative electrode of second diode couples the drain electrode of the 2nd N transistor npn npn.
The 3rd switch element, comprise one the 3rd diode and one the 3rd N transistor npn npn, wherein the grid of the 3rd N transistor npn npn couples first input end, the drain electrode of the 3rd N transistor npn npn couples one second output, the source electrode of the 3rd N transistor npn npn couples first input end, the anode of the 3rd diode couples the source electrode of the 3rd N transistor npn npn, and the negative electrode of the 3rd diode couples the drain electrode of the 3rd N transistor npn npn.
The 4th switch element, comprise one the 4th diode and one the 4th N transistor npn npn, wherein the grid of the 4th N transistor npn npn couples second input, the drain electrode of the 4th N transistor npn npn couples second output, the source electrode of the 4th N transistor npn npn couples second input, the anode of the 4th diode couples the source electrode of the 4th N transistor npn npn, and the negative electrode of the 4th diode couples the drain electrode of the 4th N transistor npn npn.
Wherein, when first input end is that the positive voltage and second input are when being negative voltage, or when first input end be the negative voltage and second input when being positive voltage, it is negative voltage that the output voltage of power supply device is fixed as first output, and second output is a positive voltage.
Power supply device of the present invention can be accepted the direct voltage input of any positive-negative polarity, and produces the fixedly direct voltage output of positive-negative polarity.Therefore, the present invention can avoid because the direct voltage of wrong input polarity, and cause no-output voltage, or because the direct voltage polarity of input causes opposite output polarity mutually on the contrary, and then cause DC power supply or connect the damage of the equipment of DC power supply so far.
Description of drawings
For above-mentioned and other purpose, feature, advantage and embodiment of the present invention can be become apparent, being described in detail as follows of accompanying drawing:
Fig. 1 illustrates the circuit diagram according to a kind of power supply device of one embodiment of the invention.
Fig. 2 illustrates the circuit diagram according to a kind of power supply device of another embodiment of the present invention.
Description of reference numerals:
100: power supply device 102: first input end
106: the first outputs of 104: the second inputs
110: the one P transistor npn npns of 108: the second outputs
114: the three P transistor npn npns of 112: the two P transistor npn npns
120: the first diodes of 116: the four P transistor npn npns
124: the three diodes of 122: the second diodes
130: the first switch elements of 126: the four diodes
140: 150: the three switch elements in second switch unit
Switch element 200 in 160: the four: power supply device
202: 204: the second inputs of first input end
208: the second outputs of 206: the first outputs
212: the two N transistor npn npns of 210: the one N transistor npn npns
216: the four N transistor npn npns of 214: the three N transistor npn npns
222: the second diodes of 220: the first diodes
226: the four diodes of 224: the three diodes
Switch element 240 in 230: the first: the second switch unit
260: the four switch elements of 250: the three switch elements
Embodiment
Please refer to Fig. 1, it illustrates the circuit diagram according to a kind of power supply device of one embodiment of the invention.Power supply device 100 comprises a first input end 102 and one second input 104, in order to input voltage; One first output 106 and one second output 108 are in order to output voltage; One first switch element 130; One second switch unit 140; One the 3rd switch element 150; And one the 4th switch element 160.Wherein, the input voltage of the first input end and second input has opposite polarity, and first switch element 130, second switch unit 140, the 3rd switch element 150, and the 4th switch element 160 comprises a diode respectively and with a transistor of kenel.
In the present embodiment, transistorized kenel is the P transistor npn npn.Wherein, first switch element 130 comprises one the one P transistor npn npn 110 and one first diode 120.The grid of the one P transistor npn npn 110 couples second input 104, the drain electrode of the one P transistor npn npn 110 couples first input end 102, the source electrode of the one P transistor npn npn 110 couples first output 106, the negative electrode of first diode 120 couples the source electrode of a P transistor npn npn 110, and the anode of first diode 120 couples the drain electrode of a P transistor npn npn 110.
The 3rd switch element 150 comprises one the 3rd P transistor npn npn 114 and one the 3rd diode 124.The grid of the 3rd P transistor npn npn 114 couples first input end 102, the drain electrode of the 3rd P transistor npn npn 114 couples second output 108, the source electrode of the 3rd P transistor npn npn 114 couples first input end 102, the negative electrode of the 3rd diode 124 couples the source electrode of the 3rd P transistor npn npn 114, and the anode of the 3rd diode 124 couples the drain electrode of the 3rd P transistor npn npn 114.
The 4th switch element 160 comprises one the 4th P transistor npn npn 116 and one the 4th diode 126.The grid of the 4th P transistor npn npn 116 couples second input 104, the drain electrode of the 4th P transistor npn npn 116 couples second output 108, the source electrode of the 4th P transistor npn npn 116 couples second input 104, the negative electrode of the 4th diode 126 couples the source electrode of the 4th P transistor npn npn 116, and the anode of the 4th diode 126 couples the drain electrode of the 4th P transistor npn npn 116.
When first input end 102 is a positive voltage, and second input 104 when being negative voltage, negative voltage conducting the one P transistor npn npn 110 and the 4th P transistor npn npn 116 of second input 104, allow a positive current by first diode 120, and one negative current by the 4th diode 126, cause first output 106 to be negative voltage for positive voltage and second output 108.
When first input end 102 is a negative voltage, and second input 104 when being positive voltage, negative voltage conducting the 2nd P transistor npn npn 112 and the 3rd P transistor npn npn 114 of first input end 102, allow a positive current by second diode 122, and one negative current by the 3rd diode 124, cause first output 106 to be negative voltage for positive voltage and second output 108.
So first output voltage 106 of power supply device 100 is fixed as the direct voltage of positive polarity, and second input voltage 108 is fixed as the direct voltage of negative polarity.
Please refer to Fig. 2, it illustrates the circuit diagram according to a kind of power supply device of another embodiment of the present invention.Power supply device 200 comprises a first input end 202 and one second input 204, in order to input voltage; One first output 206 and one second output 208 are in order to output voltage; One first switch element, 230, one second switch unit 240, the 3rd switch element 250, and one the 4th switch element 260.Wherein, the input voltage of the first input end and second input has opposite polarity, and first switch element 230, second switch unit 240, the 3rd switch element 250, and the 4th switch element 260 comprises a diode respectively and with a transistor of kenel.
In the present embodiment, transistorized kenel is the N transistor npn npn.Wherein, first switch element 230 comprises one the one N transistor npn npn 210 and one first diode 220.The grid of the one N transistor npn npn 210 couples second input 204, the drain electrode of the one N transistor npn npn 210 couples first input end 202, the source electrode of the one N transistor npn npn 210 couples first output 206, the anode of first diode 220 couples the source electrode of a N transistor npn npn 210, and the negative electrode of first diode 220 couples the drain electrode of a N transistor npn npn 210.
The 3rd switch element 250 comprises one the 3rd N transistor npn npn 214 and one the 3rd diode 224.The grid of the 3rd N transistor npn npn 214 couples first input end 202, the drain electrode of the 3rd N transistor npn npn 214 couples second output 208, the source electrode of the 3rd N transistor npn npn 214 couples first input end 202, the anode of the 3rd diode 224 couples the source electrode of the 3rd N transistor npn npn 214, and the negative electrode of the 3rd diode 224 couples the drain electrode of the 3rd N transistor npn npn 214.
The 4th switch element 260 comprises one the 4th N transistor npn npn 216 and one the 4th diode 226.The grid of the 4th N transistor npn npn 216 couples second input 204, the drain electrode of the 4th N transistor npn npn 216 couples second output 208, the source electrode of the 4th N transistor npn npn 216 couples second input 204, the anode of the 4th diode 226 couples the source electrode of the 4th N transistor npn npn 216, and the negative electrode of the 4th diode 226 couples the drain electrode of the 4th N transistor npn npn 216.
When first input end 202 is a positive voltage, and second input 204 when being negative voltage, positive voltage conducting the 2nd N transistor npn npn 212 and the 3rd N transistor npn npn 214 of first input end 202, allow a negative current by second diode 222, and one positive current by the 3rd diode 224, cause first output 206 to be positive voltage for negative voltage and second output 208.
When first input end 202 is a negative voltage, and second input 204 when being positive voltage, positive voltage conducting the one N transistor npn npn 210 and the 4th N transistor npn npn 216 of second input 204, allow a negative current by first diode 220, and one positive current by the 4th diode 226, cause first output 206 to be positive voltage for negative voltage and second output 208.
So first output voltage 206 of power supply device 200 is fixed as the direct voltage of negative polarity, and second input voltage 208 is fixed as the direct voltage of positive polarity.
Though the present invention with preferred embodiment openly as above; right its is not in order to limiting the present invention, anyly is familiar with this operator, in without departing from the spirit or scope of the invention; when can doing various changes and modification, so protection scope of the present invention should be with being as the criterion that claims were defined.
Claims (5)
1. power supply device is used to provide the DC power supply of fixed polarity output, it is characterized in that, comprises at least:
One first input end is in order to input voltage;
One second input, in order to input voltage, wherein, the input voltage of the described first input end and second input has opposite polarity;
One first output is in order to output voltage;
One second output is in order to output voltage;
One first switch element comprises a first transistor and one first diode, and wherein, described first diode is coupled to the first transistor, is used for when described the first transistor conducting, allows an electric current by described first diode;
One second switch unit comprises a transistor seconds and one second diode, and wherein, described second diode is coupled to transistor seconds, is used for when described transistor seconds conducting, allows an electric current by described second diode;
One the 3rd switch element comprises one the 3rd transistor and one the 3rd diode, and wherein, described the 3rd diode is coupled to the 3rd transistor, is used for when described the 3rd transistor turns, allows an electric current by described the 3rd diode; And
One the 4th switch element comprises one the 4th transistor and one the 4th diode, and wherein, described the 4th diode is coupled to the 4th transistor, is used for when described the 4th transistor turns, allows an electric current by described the 4th diode;
Wherein,
The grid of the first transistor couples second input, and the drain electrode of the first transistor couples first input end, and the source electrode of the first transistor couples first output;
The grid of transistor seconds couples first input end, and the drain electrode of transistor seconds couples second input, and the source electrode of transistor seconds couples first output;
The 3rd transistorized grid couples first input end, and the 3rd transistor drain couples second output, and the 3rd transistorized source electrode couples first input end;
The 4th transistorized grid couples second input, and the 4th transistor drain couples second output, and the 4th transistorized source electrode couples second input;
The two ends of each described diode link to each other respectively with source electrode with the described transistor drain of its place switch element, and when described transistor turns, the described transistorized electric current of flowing through is identical with the sense of current of the described diode of flowing through;
When the input voltage reversing of the described first input end and second input, described first output and second output have the voltage output of fixed polarity.
2. power supply device as claimed in claim 1 is characterized in that, described transistorized kenel is a P transistor npn npn; Wherein,
The grid of described the first transistor couples described second input, the drain electrode of described the first transistor couples described first input end, the source electrode of described the first transistor couples described first output, the negative electrode of described first diode couples the source electrode of described the first transistor, and the anode of described first diode couples the drain electrode of described the first transistor;
The grid of described transistor seconds couples described first input end, the drain electrode of described transistor seconds couples described second input, the source electrode of described transistor seconds couples described first output, the negative electrode of described second diode couples the source electrode of described transistor seconds, and the anode of described second diode couples the drain electrode of described transistor seconds;
The described the 3rd transistorized grid couples described first input end, described the 3rd transistor drain couples described second output, the described the 3rd transistorized source electrode couples described first input end, the negative electrode of described the 3rd diode couples the described the 3rd transistorized source electrode, and the anode of described the 3rd diode couples described the 3rd transistor drain; And
The described the 4th transistorized grid couples described second input, described the 4th transistor drain couples described second output, the described the 4th transistorized source electrode couples described second input, the negative electrode of described the 4th diode couples the described the 4th transistorized source electrode, and the anode of described the 4th diode couples described the 4th transistor drain;
Wherein,
When described first input end is that positive voltage and described second input are when being negative voltage, described described the first transistor of the second input conducting and the 4th transistor, allow a positive current by described first diode, and one negative current by described the 4th diode, causing described first output is that positive voltage and described second output are negative voltage; And
When described first input end is that negative voltage and described second input are when being positive voltage, described transistor seconds of described first input end conducting and the 3rd transistor, allow a positive current by described second diode, and one negative current by described the 3rd diode, causing described first output is that positive voltage and described second output are negative voltage.
3. power supply device as claimed in claim 1 is characterized in that, described transistorized kenel is a N transistor npn npn; Wherein,
The grid of described the first transistor couples described second input, the drain electrode of described the first transistor couples described first input end, the source electrode of described the first transistor couples described first output, the anode of described first diode couples the source electrode of described the first transistor, and the negative electrode of described first diode couples the drain electrode of described the first transistor;
The grid of described transistor seconds couples described first input end, the drain electrode of described transistor seconds couples described second input, the source electrode of described transistor seconds couples described first output, the anode of described second diode couples the source electrode of described transistor seconds, and the negative electrode of described second diode couples the drain electrode of described transistor seconds;
The described the 3rd transistorized grid couples described first input end, described the 3rd transistor drain couples described second output, the described the 3rd transistorized source electrode couples described first input end, the anode of described the 3rd diode couples the described the 3rd transistorized source electrode, and the negative electrode of described the 3rd diode couples described the 3rd transistor drain; And
The described the 4th transistorized grid couples described second input, described the 4th transistor drain couples described second output, the described the 4th transistorized source electrode couples described second input, the anode of described the 4th diode couples the described the 4th transistorized source electrode, and the negative electrode of described the 4th diode couples described the 4th transistor drain;
Wherein,
When described first input end is that positive voltage and described second input are when being negative voltage, described transistor seconds of described first input end conducting and the 3rd transistor, allow a negative current by described second diode, and one positive current by described the 3rd diode, causing described first output is that negative voltage and described second output are positive voltage; And
When described first input end is that negative voltage and described second input are when being positive voltage, described described the first transistor of the second input conducting and the 4th transistor, allow a negative current by described first diode, and one positive current by described the 4th diode, causing described first output is that negative voltage and described second output are positive voltage.
4. power supply device is used to provide the DC power supply of fixed polarity output, it is characterized in that, comprises at least:
One first input end is in order to input voltage;
One second input is in order to input voltage; Wherein, the input voltage of the described first input end and second input has opposite polarity;
One first output is in order to output voltage;
One second output is in order to output voltage;
One first switch element, comprise one the one P transistor npn npn and one first diode, wherein, the grid of a described P transistor npn npn couples described second input, the drain electrode of a described P transistor npn npn couples described first input end, the source electrode of a described P transistor npn npn couples described first output, and the negative electrode of described first diode couples the source electrode of a described P transistor npn npn, and the anode of described first diode couples the drain electrode of a described P transistor npn npn;
One second switch unit, comprise one the 2nd P transistor npn npn and one second diode, wherein, the grid of described the 2nd P transistor npn npn couples described first input end, the drain electrode of described the 2nd P transistor npn npn couples described second input, the source electrode of described the 2nd P transistor npn npn couples described first output, and the negative electrode of described second diode couples the source electrode of described the 2nd P transistor npn npn, and the anode of described second diode couples the drain electrode of described the 2nd P transistor npn npn;
One the 3rd switch element, comprise one the 3rd P transistor npn npn and one the 3rd diode, wherein, the grid of described the 3rd P transistor npn npn couples described first input end, the drain electrode of described the 3rd P transistor npn npn couples described second output, the source electrode of described the 3rd P transistor npn npn couples described first input end, and the negative electrode of described the 3rd diode couples the source electrode of described the 3rd P transistor npn npn, and the anode of described the 3rd diode couples the drain electrode of described the 3rd P transistor npn npn; And
One the 4th switch element, comprise one the 4th P transistor npn npn and one the 4th diode, wherein, the grid of described the 4th P transistor npn npn couples described second input, the drain electrode of described the 4th P transistor npn npn couples described second output, the source electrode of described the 4th P transistor npn npn couples described second input, and the negative electrode of described the 4th diode couples the source electrode of described the 4th P transistor npn npn, and the anode of described the 4th diode couples the drain electrode of described the 4th P transistor npn npn;
Wherein,
When described first input end is that positive voltage and described second input are when being negative voltage, or when described first input end be that negative voltage and described second input are when being positive voltage, it is positive voltage that the output voltage of described power supply device all is fixed as described first output, and described second output is a negative voltage.
5. power supply device is used to provide the DC power supply of fixed polarity output, it is characterized in that, comprises at least:
One first input end is in order to input voltage;
One second input is in order to input voltage; Wherein, the input voltage of the described first input end and second input has opposite polarity;
One first output is in order to output voltage;
One second output is in order to output voltage;
One first switch element, comprise one the one N transistor npn npn and one first diode, wherein, the grid of a described N transistor npn npn couples described second input, the drain electrode of a described N transistor npn npn couples described first input end, the source electrode of a described N transistor npn npn couples described first output, and the anode of described first diode couples the source electrode of a described N transistor npn npn, and the negative electrode of described first diode couples the drain electrode of a described N transistor npn npn;
One second switch unit, comprise one the 2nd N transistor npn npn and one second diode, wherein, the grid of described the 2nd N transistor npn npn couples described first input end, the drain electrode of described the 2nd N transistor npn npn couples described second input, the source electrode of described the 2nd N transistor npn npn couples described first output, and the anode of described second diode couples the source electrode of described the 2nd N transistor npn npn, and the negative electrode of described second diode couples the drain electrode of described the 2nd N transistor npn npn;
One the 3rd switch element, comprise one the 3rd N transistor npn npn and one the 3rd diode, wherein, the grid of described the 3rd N transistor npn npn couples described first input end, the drain electrode of described the 3rd N transistor npn npn couples described second output, the source electrode of described the 3rd N transistor npn npn couples described first input end, and the anode of described the 3rd diode couples the source electrode of described the 3rd N transistor npn npn, and the negative electrode of described the 3rd diode couples the drain electrode of described the 3rd N transistor npn npn; And
One the 4th switch element, comprise one the 4th N transistor npn npn and one the 4th diode, wherein, the grid of described the 4th N transistor npn npn couples described second input, the drain electrode of described the 4th N transistor npn npn couples described second output, the source electrode of described the 4th N transistor npn npn couples described second input, and the anode of described the 4th diode couples the source electrode of described the 4th N transistor npn npn, and the negative electrode of described the 4th diode couples the drain electrode of described the 4th N transistor npn npn;
Wherein, when described first input end is that positive voltage and described second input are when being negative voltage, or when described first input end be that negative voltage and described second input are when being positive voltage, it is negative voltage that the output voltage of described power supply device is fixed as described first output, and described second output is a positive voltage.
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| CN 200610031020 CN100553089C (en) | 2006-09-11 | 2006-09-11 | Power supply device |
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| CN100553089C true CN100553089C (en) | 2009-10-21 |
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| CN 200610031020 Expired - Fee Related CN100553089C (en) | 2006-09-11 | 2006-09-11 | Power supply device |
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| Country | Link |
|---|---|
| CN (1) | CN100553089C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110874109B (en) * | 2018-08-30 | 2021-11-16 | 环达电脑(上海)有限公司 | Power input control circuit |
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2006
- 2006-09-11 CN CN 200610031020 patent/CN100553089C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101145730A (en) | 2008-03-19 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20091021 Termination date: 20210911 |