CN203775038U - Low-voltage DC-power-supply boost-up circuit - Google Patents
Low-voltage DC-power-supply boost-up circuit Download PDFInfo
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- CN203775038U CN203775038U CN201420119899.4U CN201420119899U CN203775038U CN 203775038 U CN203775038 U CN 203775038U CN 201420119899 U CN201420119899 U CN 201420119899U CN 203775038 U CN203775038 U CN 203775038U
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- 230000005669 field effect Effects 0.000 claims abstract description 7
- 238000004146 energy storage Methods 0.000 claims description 32
- 230000008878 coupling Effects 0.000 claims description 20
- 238000010168 coupling process Methods 0.000 claims description 20
- 238000005859 coupling reaction Methods 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 16
- 230000010355 oscillation Effects 0.000 description 9
- 230000010363 phase shift Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000005059 dormancy Effects 0.000 description 1
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- 230000008010 sperm capacitation Effects 0.000 description 1
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Abstract
The utility model relates to a boost-up circuit and discloses a low-voltage DC-power-supply boost-up circuit which includes a DC power supply, a transformer, an N-channel junction field effect transistor (JFET) and a frequency selection network. An anode of the DC power supply is connected with a first port of a primary side of the transformer. A cathode of the DC power supply is connected with a source electrode of the N-channel JFET. A second port of the primary side is connected with a drain electrode of the N-channel JFET. A first port of a secondary side of the transformer is connected with a first port of the frequency selection network and a second port of the secondary side is connected with a lowest electric potential of the low-voltage DC power-supply boost-up circuit. A second port of the frequency selection network is connected with a grid electrode of the N-channel JFET. A third port of the frequency selection network is connected with the lowest electric potential. An output end of the low-voltage DC power-supply boost-up circuit is connected with the first port of the secondary side of the transformer. Compared with the prior art, the low-voltage DC-power-supply boost-up circuit is capable of improving an extremely low voltage (e.g., a voltage lower than 100mV) to an appropriate level so as to supply power to a load.
Description
Technical field
The utility model relates to booster circuit, particularly low-voltage dc power supply booster circuit.
Background technology
At present, that common low pressure booster circuit all uses is traditional DC(Direct current, direct current)-DC(Direct current, direct current) circuit or charge pump circuit.Because the performance of semiconductor element is limit, make common DC-DC circuit and charge pump circuit in the time of the voltage input (as the direct voltage lower than 100mV) in the face of extremely low, all can not work, input voltage cannot be risen to a suitable level, for load provides electric power.
In addition, in the situation that front end power is limited, even boost in voltage is got up, follow-up equipment also cannot use because power is too low.
Utility model content
The purpose of this utility model is to provide a kind of low-voltage dc power supply booster circuit, makes extremely low voltage (such as voltage is lower than 100mV) to be risen to suitable level, and be load supplying.
For solving the problems of the technologies described above, the utility model provides a kind of low-voltage dc power supply booster circuit, comprises: DC power supply, transformer, N channel junction field-effect pipe JFET and frequency-selective network;
The positive pole of described DC power supply is connected with first port on the former limit of described transformer, and the negative pole of described DC power supply is connected with the source electrode of described N raceway groove JFET; Second port on described former limit is connected with the drain electrode of described N raceway groove JFET; The first port of the secondary of described transformer is connected with the first port of described frequency-selective network, and the second port of described secondary is connected with the potential minimum of described low-voltage dc power supply booster circuit; The second port of described frequency-selective network is connected with the grid of described N raceway groove JFET, and the 3rd port of described frequency-selective network is connected with described potential minimum;
Wherein, the first port of the output of described low-voltage dc power supply booster circuit and the secondary of described transformer is connected.
In terms of existing technologies, transformer amplifies the disturbing signal of carrying in the d. c. voltage signal of former limit input the utility model execution mode, and wherein, disturbing signal comprises multi-frequency; The secondary of transformer exports the disturbing signal of amplifying through transformer to frequency-selective network; Frequency-selective network only allows the disturbing signal of characteristic frequency to pass through, and exports the disturbing signal of this characteristic frequency of choosing to N raceway groove JFET; The disturbing signal of this characteristic frequency is fed back to transformer primary side by N raceway groove JFET, further strengthens the voltage fluctuation of former limit disturbing signal; And circuit is in resonance situation, the loop that comprises frequency-selective network is real impedance character, and numerical value is larger, and the drain voltage of JFET and grid voltage are by the phase shift that produces 180 ° like this; Meanwhile, secondary coil has been introduced again the phase shift of 180 °.The phase shift of whole like this closed-loop path is 180 °+180 °=360 °, makes feedback signal meet the phase equilibrium of circuit oscillation, and produces oscillator signal, and wherein, this oscillator signal is ac signal; The flow direction of oscillator signal is consistent with disturbing signal, and transformer successively amplifies this oscillator signal, and the oscillation amplitude of this oscillator signal strengthens gradually.Due to N raceway groove JFET amplify non-linear, finally make the oscillation amplitude of this oscillator signal be stabilized to certain amplitude, and load supplying is thought in output output by low-voltage dc power supply booster circuit.Low-voltage dc power supply booster circuit in the utility model, makes extremely low voltage (such as voltage is lower than 100mV) to be risen to suitable level, is load supplying.
In addition, also comprise energy-storage units;
Described energy-storage units is connected between described coupling capacitance and the output of described low-voltage dc power supply booster circuit.
Wherein, described energy-storage units comprises management of charging and discharging subelement;
Described management of charging and discharging subelement is connected with described energy-storage units.
By management of charging and discharging subelement, the electric energy in energy-storage units being monitored, while making energy-storage units voltage in charging process reach default upper threshold value, open for electric channel, is load supplying; When energy-storage units is closing for electric channel when making voltage lower than default lower threshold value due to power consumption in load supplying process, stop as load supplying; Utilization arranges the mode of upper and lower threshold value the electric energy in energy-storage units is stored and power supply management efficiently.
In addition, also comprise coupling capacitance;
Described coupling capacitance is connected between first port of secondary and the output of described low-voltage dc power supply booster circuit of described transformer.
Coupling capacitance, for by ac signal coupling output, is thought load supplying, prevents the impact of follow-up load on booster circuit.Because coupling capacitance is existing ripe device, ensure the feasibility of the utility model execution mode.
Brief description of the drawings
Fig. 1 is according to the structural representation of the low-voltage dc power supply booster circuit of the utility model the first execution mode;
Fig. 2 is according to the structural representation of the low-voltage dc power supply booster circuit of the utility model the second execution mode;
Fig. 3 is according to the logical schematic of the management of charging and discharging subelement in the utility model the second execution mode;
Fig. 4 is according to the structural representation of the low-voltage dc power supply booster circuit of the utility model the 3rd execution mode.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, each execution mode of the present utility model is explained in detail.But, persons of ordinary skill in the art may appreciate that in the each execution mode of the utility model, in order to make reader understand the application better, many ins and outs are proposed.But, even without these ins and outs and the many variations based on following execution mode and amendment, also can realize the each claim of the application technical scheme required for protection.
The first execution mode of the present utility model relates to a kind of low-voltage dc power supply booster circuit, concrete structure as shown in Figure 1, comprise: the output of DC power supply, transformer, N channel junction field-effect pipe (Junction Field Effect Transistor is called for short JFET), frequency-selective network, coupling capacitance and low-voltage dc power supply booster circuit.
In Fig. 1,1 is DC power supply, and 2 is transformer, and 3 is N channel junction field-effect pipe, and 4 is coupling capacitance, and 5 is the output of low-voltage dc power supply booster circuit.
Wherein, the positive pole output of DC power supply is with the d. c. voltage signal of disturbing signal, and disturbing signal comprises multi-frequency.
The positive pole of DC power supply is connected with first port on the former limit of transformer, and the negative pole of DC power supply is connected with the source electrode of N raceway groove JFET; Second port on former limit is connected with the drain electrode of N raceway groove JFET; The first port of the secondary of transformer is connected with the first port of frequency-selective network, and the second port of secondary is connected with the potential minimum of low-voltage dc power supply booster circuit; The second port of frequency-selective network is connected with the grid of N raceway groove JFET, and the 3rd port of frequency-selective network is connected with the potential minimum of low-voltage dc power supply booster circuit; Wherein, the first port of the output of low-voltage dc power supply booster circuit and the secondary of transformer is connected; Coupling capacitance is connected between first port of secondary and the output of low-voltage dc power supply booster circuit of transformer.
In the utility model, the negative pole that the potential minimum of low-voltage dc power supply booster circuit is DC power supply; First port on the former limit of transformer and the first port of secondary are Same Name of Ends.
Next, introduce by reference to the accompanying drawings the operation principle of the utility model mesolow DC power supply booster circuit.
As shown in Figure 1, the output of the positive pole of DC power supply carries the d. c. voltage signal of small sample perturbations signal to the former limit of transformer.The magnitude of voltage of this d. c. voltage signal extremely low (such as lower than 100mV).
Transformer amplifies the disturbing signal of carrying in the d. c. voltage signal of former limit input, and the secondary of transformer exports the disturbing signal of amplifying through transformer to frequency-selective network.
Frequency-selective network only allows the disturbing signal of characteristic frequency to pass through, and exports the disturbing signal of this characteristic frequency of choosing to N raceway groove JFET.
The disturbing signal of this characteristic frequency is fed back to transformer primary side by N raceway groove JFET, further strengthens the voltage fluctuation of former limit disturbing signal.
Specifically, the voltage pole of the grid of N raceway groove JFET is low, and has fluctuation, and source electrode is connected with the potential minimum of DC voltage booster circuit, and the electrical potential difference between grid and the source electrode of N raceway groove JFET is at about 0 volt.When the electrical potential difference between grid and the source electrode of N raceway groove JFET is during 0 volt of left and right, all can control the electric current between drain electrode and source electrode.Based on this, utilize N raceway groove JFET that the disturbing signal of amplifying through transformer is fed back to transformer primary side, further strengthen the voltage fluctuation of former limit disturbing signal; And circuit is in resonance situation, the loop that comprises frequency-selective network is real impedance character, and numerical value is larger, and the drain voltage of JFET and grid voltage are by the phase shift that produces 180 ° like this; Meanwhile, secondary coil has been introduced again the phase shift of 180 °.The phase shift of whole like this closed-loop path is 180 °+180 °=360 °, makes feedback signal meet the phase equilibrium of circuit oscillation, and produces oscillator signal, and wherein, this oscillator signal is ac signal.
The flow direction of oscillator signal is consistent with disturbing signal, and transformer successively amplifies this oscillator signal, and the oscillation amplitude of this oscillator signal strengthens gradually.Due to N raceway groove JFET amplify non-linear, finally make the oscillation amplitude of this oscillator signal be stabilized to certain amplitude.
Finally, exported by the output of low-voltage dc power supply booster circuit by coupling capacitance through the oscillator signal (being ac signal) that amplifies and be stabilized in certain amplitude, be load supplying, and prevent the impact of follow-up load on booster circuit.Wherein, the value of coupling capacitance is determined by follow-up load circuit.Low-voltage dc power supply booster circuit in the utility model, makes extremely low voltage (such as voltage is lower than 100mV) to be risen to suitable level, is load supplying.That is to say, the faint energy of external environment capacitation equipment utmost point low-voltage can be boosted to suitable level and be used.
Compared with prior art, utilize transformer to amplify the disturbing signal of carrying in the d. c. voltage signal of former limit input; The secondary of transformer exports the disturbing signal of amplifying through transformer to frequency-selective network and carries out filtering; Frequency-selective network is chosen the disturbing signal of characteristic frequency and is exported N raceway groove JFET to; The disturbing signal of this characteristic frequency is fed back to transformer primary side by N raceway groove JFET, further strengthens the voltage fluctuation of former limit disturbing signal; And in resonance situation, feedback signal has met the phase equilibrium of circuit oscillation, circuit produces oscillator signal, and the flow direction of this oscillator signal is consistent with disturbing signal; Transformer successively amplifies oscillator signal, and the oscillation amplitude of this oscillator signal strengthens gradually.Due to N raceway groove JFET amplify non-linear, finally make the oscillation amplitude of this oscillator signal be stabilized to certain amplitude, and output output by low-voltage dc power supply booster circuit, think load supplying.Low-voltage dc power supply booster circuit in the utility model, makes extremely low voltage (such as voltage is lower than 100mV) to be risen to suitable level, is load supplying.
The second execution mode of the present utility model relates to a kind of low-voltage dc power supply booster circuit.The second execution mode has been done further improvement on the basis of the first execution mode.In the second execution mode of the present utility model, also comprise rectification unit, energy-storage units and voltage regulation unit; Wherein, energy-storage units also comprises management of charging and discharging subelement, specifically as shown in Figure 2, can store efficiently and power supply management electric energy.
In the utility model, energy-storage units is connected between coupling capacitance and the output of low-voltage dc power supply booster circuit, and wherein, energy-storage units comprises management of charging and discharging subelement, and management of charging and discharging subelement is connected with energy-storage units; Rectification unit is connected between coupling capacitance and energy-storage units; Voltage regulation unit is connected between energy-storage units and the output of low-voltage dc power supply booster circuit.That is to say, one end of rectification unit is connected with coupling unit, and the other end is connected with one end of energy-storage units; The other end of energy-storage units is connected with one end of voltage regulation unit; The other end of voltage regulation unit is connected with the output of low-voltage dc power supply booster circuit.
Rectification unit carries out rectification to the oscillator signal receiving from coupling capacitance, and the oscillator signal that is about to exchange is converted to direct current signal, and exports energy-storage units to.
The electric energy that energy-storage units carries direct current signal is stored, and after voltage regulation unit voltage stabilizing is processed, exports load to when for load supplying.
Wherein, energy-storage units comprises management of charging and discharging subelement, and management of charging and discharging subelement is connected with energy-storage units.Management of charging and discharging subelement is to adopt CMOS(Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductors (CMOS)) element builds, in order to realize the hysteresis loop management of charging and discharging of electric energy.As shown in Figure 3, transverse axis is voltage to the logic of the management of charging and discharging of management of charging and discharging subelement, and the longitudinal axis is the state opening or closing representing for electric channel.Management of charging and discharging subelement is monitored the electric energy in energy-storage units, while making energy-storage units voltage in charging process reach 3.0 volts of default upper threshold values, opens for electric channel, and be load supplying; When energy-storage units is closing for electric channel when making voltage lower than 2.5 volts of default lower threshold values due to power consumption in load supplying process, stop as load supplying; Utilization arranges the mode of upper and lower threshold value the electric energy in energy-storage units is stored and power supply management efficiently, and realizes that to utilize the electric energy that energy-storage units stores between upper and lower threshold value be load supplying.
In addition, low-voltage dc power supply booster circuit in the utility model, utmost point low-voltage can be boosted to appropriate level, if coordinate the operational mode of corresponding low power consuming devices and low power consuming devices dormancy at intermittence can realize the object that adopts the continuous power supply to the device of the faint energy, low power consuming devices can be safeguarded without power supply, minimizing, further widen the range of application of low power consuming devices.
The 3rd execution mode of the present utility model relates to a kind of low-voltage dc power supply booster circuit.The 3rd execution mode is the further refinement of the second execution mode.In the 3rd execution mode of the present utility model, frequency-selective network comprises electric capacity and resistance.Low-voltage dc power supply booster circuit in present embodiment, concrete structure as shown in Figure 4.
In Fig. 4,1 is DC power supply, and 2 is transformer, and 3 is N channel junction field-effect pipe, and 4 is coupling capacitance, and 5 is the output of low-voltage dc power supply booster circuit, and 6 is electric capacity, and 7 is resistance.
In the present embodiment, frequency-selective network comprises electric capacity and resistance.Electric capacity one end is connected with the first port of frequency-selective network, and the other end is connected with the second port of frequency-selective network; One end of resistance is connected with the second port of frequency-selective network, and the other end is connected with the 3rd port of frequency-selective network.Resistance and electric capacity form RC frequency-selective network jointly.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above are to realize specific embodiment of the utility model, and in actual applications, can do various changes to it in the form and details, and do not depart from spirit and scope of the present utility model.
Claims (9)
1. a low-voltage dc power supply booster circuit, is characterized in that, comprises: DC power supply, transformer, N channel junction field-effect pipe JFET and frequency-selective network;
The positive pole of described DC power supply is connected with first port on the former limit of described transformer, and the negative pole of described DC power supply is connected with the source electrode of described N raceway groove JFET; Second port on described former limit is connected with the drain electrode of described N raceway groove JFET; The first port of the secondary of described transformer is connected with the first port of described frequency-selective network, and the second port of described secondary is connected with the potential minimum of described low-voltage dc power supply booster circuit; The second port of described frequency-selective network is connected with the grid of described N raceway groove JFET, and the 3rd port of described frequency-selective network is connected with described potential minimum;
Wherein, the first port of the output of described low-voltage dc power supply booster circuit and the secondary of described transformer is connected.
2. low-voltage dc power supply booster circuit according to claim 1, is characterized in that, also comprises coupling capacitance;
Described coupling capacitance is connected between first port of secondary and the output of described low-voltage dc power supply booster circuit of described transformer.
3. low-voltage dc power supply booster circuit according to claim 2, is characterized in that, also comprises energy-storage units;
Described energy-storage units is connected between described coupling capacitance and the output of described low-voltage dc power supply booster circuit.
4. low-voltage dc power supply booster circuit according to claim 3, is characterized in that, described energy-storage units comprises management of charging and discharging subelement;
Described management of charging and discharging subelement is connected with described energy-storage units.
5. low-voltage dc power supply booster circuit according to claim 3, is characterized in that, also comprises rectification unit;
Described rectification unit is connected between described coupling capacitance and described energy-storage units.
6. low-voltage dc power supply booster circuit according to claim 3, is characterized in that, also comprises voltage regulation unit;
Described voltage regulation unit is connected between described energy-storage units and the output of described low-voltage dc power supply booster circuit.
7. low-voltage dc power supply booster circuit according to claim 1, is characterized in that, the negative pole that the potential minimum of described low-voltage dc power supply booster circuit is described DC power supply.
8. low-voltage dc power supply booster circuit according to claim 1, is characterized in that, first port on described former limit and the first port of described secondary are Same Name of Ends.
9. low-voltage dc power supply booster circuit according to claim 1, is characterized in that, described frequency-selective network comprises electric capacity and resistance;
Described electric capacity one end is connected with the first port of described frequency-selective network, and the other end is connected with the second port of described frequency-selective network; One end of described resistance is connected with the second port of described frequency-selective network, and the other end is connected with the 3rd port of described frequency-selective network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420119899.4U CN203775038U (en) | 2014-03-17 | 2014-03-17 | Low-voltage DC-power-supply boost-up circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420119899.4U CN203775038U (en) | 2014-03-17 | 2014-03-17 | Low-voltage DC-power-supply boost-up circuit |
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| CN203775038U true CN203775038U (en) | 2014-08-13 |
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| CN201420119899.4U Expired - Lifetime CN203775038U (en) | 2014-03-17 | 2014-03-17 | Low-voltage DC-power-supply boost-up circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935169A (en) * | 2014-03-17 | 2015-09-23 | 上海新物科技有限公司 | DC boost circuit |
-
2014
- 2014-03-17 CN CN201420119899.4U patent/CN203775038U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104935169A (en) * | 2014-03-17 | 2015-09-23 | 上海新物科技有限公司 | DC boost circuit |
| CN104935169B (en) * | 2014-03-17 | 2019-01-29 | 上海新物科技有限公司 | DC power supply booster circuit |
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Granted publication date: 20140813 |
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