CN106155153B - The system of anti-voltage impulse disturbances - Google Patents
The system of anti-voltage impulse disturbances Download PDFInfo
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- CN106155153B CN106155153B CN201510149122.1A CN201510149122A CN106155153B CN 106155153 B CN106155153 B CN 106155153B CN 201510149122 A CN201510149122 A CN 201510149122A CN 106155153 B CN106155153 B CN 106155153B
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Abstract
The present invention relates to electronic technology fields, and in particular to a kind of circuit system.The system of anti-voltage impulse disturbances, including a reference voltage generating circuit, for generating a reference voltage, the ground terminal of reference voltage generating circuit connects a benchmark earth signal；Benchmark earth signal is generated by a benchmark signal generating circuit, and benchmark signal generating circuit includes, an operational amplifier, and benchmark earth signal is generated under the action of a positive voltage and a negative supply voltage；One charge pump circuit, for generating negative supply voltage.The present invention generates the benchmark earth signal of a standard by benchmark signal generating circuit, is supplied to reference voltage generating circuit, can be interfered to avoid circuit by pulse signal, it is ensured that the stabilization of reference voltage.
Description
Technical field
The present invention relates to electronic technology fields, and in particular to a kind of circuit system.
Background technology
Portion usually needs the inside source of stable pressure of high quality in the chip, to provide stable bias voltage or as comparator
Reference voltage, as in linear voltage regulator (LDO) by reference to reference circuit generate reference voltage, utilize the reference voltage and one
It samples and is compared from the voltage feedback signal of linear stabilizer output voltage to drive adjustment element, to stabilize the output voltage；
Generally reference data circuit is required to be capable of providing stable voltage in circuit, it should not by supply voltage and the shadow of operating temperature
It rings, however is found in practical application, reference data circuit can usually be interfered by pulse signal, in particular with simulation numeral
The large-scale use of hybrid system, the pulse signal of digital circuit generate interference to analog circuit often through power supply, affect
The normal work of reference data voltage.
Invention content
The object of the present invention is to provide a kind of system of anti-voltage impulse disturbances, solution more than technical problems；
Following technical scheme may be used to realize in technical problem solved by the invention：
The system of anti-voltage impulse disturbances, wherein, including,
One reference voltage generating circuit, for generating a reference voltage, the ground terminal of the reference voltage generating circuit connects
Connect a benchmark earth signal；The benchmark earth signal is generated by a benchmark signal generating circuit, and the benchmark earth signal generates
Circuit includes,
One operational amplifier generates the benchmark earth signal under the action of a positive voltage and a negative supply voltage；
One charge pump circuit, for generating the negative supply voltage.
The system of the anti-voltage impulse disturbances of the present invention, the operational amplifier include,
First power end, for connecting the positive voltage；
Second source end, for connecting the negative supply voltage；
First input end, for connecting one first input signal；
Second input terminal, for connecting one second input signal；
Output terminal；
The differential amplifier circuit of a plurality of metal-oxide-semiconductor compositions is controllably connected to first power end, second electricity
Between source, the first input end, second input terminal and the output terminal, to first input signal and institute
The second input signal is stated to carry out exporting the benchmark earth signal from the output terminal after differential amplification.
The system of the anti-voltage impulse disturbances of the present invention, the differential amplifier circuit include,
First NMOS tube, grid are connect with first input signal, and drain electrode connection one first crosses node, and source electrode connects
One second is connect to cross node；
Second NMOS tube, grid are connect with second input signal, and drain electrode connects the output terminal, source electrode connection institute
Second is stated to cross node；
First PMOS tube, source electrode are connect with first power end, and drain electrode crosses Node connectedness with described first, grid
It is connected with the drain electrode；
Second PMOS tube, source electrode are connect with first power end, drain electrode connect with the output terminal, grid with it is described
The grid connection of first PMOS tube；
Third NMOS tube, grid connect a bias voltage, and source electrode is connect with the second source end, described in drain electrode connection
Second crosses node.
The system of the anti-voltage impulse disturbances of the present invention, the charge pump circuit include：
One switch control signal generation circuit, for generating one group of switch control signal；
One is provided with the operating circuit of storage capacitor, and including multiple switch branch, control terminal is produced with the switching signal
Raw circuit connection, multiple switching branches act on lower combination turn-on and turn-off in the switch control signal, described to obtain
Negative supply voltage.
The system of the anti-voltage impulse disturbances of the present invention, the operating circuit include,
One Input voltage terminal is connect with an operating voltage；
One output voltage terminal；
First switch branch is connected between the Input voltage terminal and one first reference mode；
Second switch branch is connected between first reference mode and the first ground terminal；
Third switching branches are connected between the output voltage terminal and one second reference mode；
4th switching branches are connected between second reference mode and the second ground terminal；
One first storage capacitor is connected between first reference mode and second reference mode；
One second storage capacitor is connected between the output voltage terminal and first ground terminal；
When charge mode, the Input voltage terminal charges the operating circuit to first storage capacitor；
The operating circuit is put when discharge mode from the first storage capacitor both ends to second storage capacitor
Electricity.
The system of the anti-voltage impulse disturbances of the present invention, the switch control signal generation circuit include,
Comparator is produced in one second reference voltage and a sampling under the voltage feedback signal effect of the output voltage terminal
A raw comparison signal；
Control electrical appliances for electric charge pump generates the switch control signal under the action of the comparison signal.
The system of the anti-voltage impulse disturbances of the present invention, the reference voltage generating circuit include,
One current source；
One resistor voltage divider circuit is series between the current source and the ground terminal；The resistor voltage divider circuit includes
Predetermined number and the divider resistance between the current source and the ground terminal is connected in series with each other, between the divider resistance
The dot being connected is into divider node；The reference voltage is drawn from scheduled divider node.
Advantageous effect：Due to using the technology described above, the present invention generates a standard by benchmark signal generating circuit
Benchmark earth signal, be supplied to reference voltage generating circuit, can be interfered to avoid by pulse signal, it is ensured that reference voltage is steady
It is fixed.
Description of the drawings
Fig. 1 is the circuit system structure figure of the present invention；
Fig. 2 is the charge pump circuit structure diagram of the present invention；
Fig. 3 is the circuit structure diagram of the operational amplifier of the present invention；
The schematic diagram of the reference voltage generating circuit of Fig. 4 present invention；
Circuit waveform schematic diagram when being interfered by pulse signal of Fig. 5 prior arts；
The circuit waveform schematic diagrames of Fig. 6 after applying the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The invention will be further described in the following with reference to the drawings and specific embodiments, but not as limiting to the invention.
Reference Fig. 1, the system of anti-voltage impulse disturbances, wherein, including,
One reference voltage generating circuit 3, for generating a reference voltage V ref, the ground terminal of reference voltage generating circuit 3
Connect a benchmark earth signal GNDACC；Benchmark earth signal GNDACC is generated by a benchmark signal generating circuit, benchmark letter
Number generation circuit includes,
One operational amplifier 2 generates benchmark under the action of a positive voltage VDD and a negative supply voltage CPVSS
Signal GNDACC；
One charge pump circuit 1, for generating negative supply voltage CPVSS.
The present invention generates accurate zero volts by the operational amplifier 2 of positive-negative power power voltage supply and is used as benchmark letter
Number GNDACC, can be interfered to avoid by pulse signal, it is ensured that reference voltage is stablized.
The system of the anti-voltage impulse disturbances of the present invention, with reference to Fig. 2, charge pump circuit 1 can include：
One switch control signal generation circuit 12, for generating one group of switch control signal；
One is provided with the operating circuit 13 of storage capacitor, including multiple switch branch, control terminal and switch control signal
Generation circuit 12 connects, and multiple switch branch acts on lower combination turn-on and turn-off in switch control signal, to obtain negative supply electricity
Press CPVSS.
The system of the anti-voltage impulse disturbances of the present invention, operating circuit 13 include,
One Input voltage terminal VDD, connect with an operating voltage；
One output voltage terminal VSS；
First switch branch is connected between Input voltage terminal VDD and one first reference mode x1；
Second switch branch is connected between the first reference mode x1 and the first ground terminal GND1；
Third switching branches are connected between output voltage terminal VSS and one second reference mode x2；
4th switching branches are connected between the second reference mode x2 and the second ground terminal GND2；
One first storage capacitor C1 is connected between the first reference mode x1 and the second reference mode x2；
One second storage capacitor C2 is connected between output voltage terminal VSS and the first ground terminal GND1；
When charge mode, Input voltage terminal VDD's operating circuit 13 charges to the first storage capacitor C1；
Operating circuit 13 discharges when discharge mode from the first storage capacitor C1 both ends to the second storage capacitor C2.
Charge pump circuit external circuits are simple, and without using inductance as energy-storage travelling wave tube, thus electromagnetic interference is small, foundation
Different topological structures and control method, can realize boosting, decompression and voltage reversal function, and anti-voltage pulse of the invention is done
The system disturbed can also include another charge pump circuit, for generating positive voltage VDD.
The system of the anti-voltage impulse disturbances of the present invention, switch control signal generation circuit 12 include,
Comparator 123 samples the voltage feedback signal from output voltage terminal VSS in one second reference voltage V ref1 and one
Effect is lower to generate a comparison signal；
Control electrical appliances for electric charge pump 121, generates switch control signal under the action of comparison signal.
Switch control signal generation circuit 12 is realized using the prior art, is not belonging to the improved technical characteristic of the present invention,
This is not repeated.
The system of the anti-voltage impulse disturbances of the present invention, operational amplifier 2 can include,
First power end VDD, for connecting positive voltage；
Second source end VSS, for connecting negative supply voltage CPVSS；
First input end Vip, for connecting one first input signal；
Second input terminal Vin, for connecting one second input signal；
Output end vo ut；
The differential amplifier circuit of a plurality of metal-oxide-semiconductor compositions, is controllably connected to the first power end VDD, second source end
Between VSS, first input end Vip, the second input terminal Vin and output end vo ut, to be inputted to the first input signal and second
From output end vo ut output reference earth signals GNDACC after signal progress differential amplification.
The system of the anti-voltage impulse disturbances of the present invention, differential amplifier circuit include,
First NMOS tube Mn1, grid are connect with first input end Vip, and drain electrode connection one first crosses node A, source electrode
One second is connected to cross node B；
Second NMOS tube Mn2, grid are connect with the second input terminal Vin, drain electrode connection output end vo ut, source electrode connection the
Two cross node B；
First PMOS tube Mp1, source electrode are connect with the first power end VDD, and drain electrode is connect with the first node A that crosses, grid
It is connected with drain electrode；
Second PMOS tube Mp2, source electrode are connect with the first power end VDD, and drain electrode is connect with output end vo ut, grid and the
The grid connection of one PMOS tube Mp1；
Third NMOS tube Mn3, grid connect a bias voltage Vbias, and source electrode is connect with second source end VSS, drain
Connection second crosses node B.
The differential amplifier circuit of the present invention is the difference to pipe using the first NMOS tube Mn1, the second NMOS tube Mn2 as input
Amplifier, load current mirror are made of the first PMOS tube Mp1 and the second PMOS tube Mp2, and third NMOS tube Mn3 provides difference and puts
The operating current of big circuit.Differential amplifier circuit has relatively strong compared with the single ended inputs circuit such as common-source amplifier, common-drain amplifier
Common mode input signal rejection ability, have better antijamming capability, and input, output signal range it is larger.
The system of the anti-voltage impulse disturbances of the present invention, reference voltage generating circuit 3 include,
One current source Ibias；
One resistor voltage divider circuit is series between current source Ibias and ground terminal；Resistor voltage divider circuit includes predetermined number
And the divider resistance between current source Ibias and ground terminal is connected in series with each other, the point being connected between divider resistance is formed
Divider node；Reference voltage V ref is drawn from scheduled divider node.Ground terminal connection benchmark earth signal GNDACC.
The above-mentioned reference voltage generating circuit 3 using electric resistance partial pressure is a kind of realization electricity of simple reference voltage source
After road, comparison diagram 5 and Fig. 6 can be seen that benchmark earth signal using the present invention, reference voltage output is stablized, and realizes the anti-external world
The interference of pulse signal, the present invention can extend to the reference data source in other chip systems, be realized by simple circuit
Reference voltage is stablized.
The foregoing is merely preferred embodiments of the present invention, not thereby limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all include within the scope of the present invention.
Claims (5)
1. the system of anti-voltage impulse disturbances, which is characterized in that for analog-digital hybrid system, including reference voltage production
Raw circuit, for generating a reference voltage, the ground terminal of the reference voltage generating circuit connects a benchmark earth signal；The base
Quasi- earth signal is generated by a benchmark signal generating circuit, and the benchmark signal generating circuit includes,
One operational amplifier generates the benchmark earth signal under the action of a positive voltage and a negative supply voltage；
One charge pump circuit, for generating the negative supply voltage；
Another charge pump circuit, for generating the positive voltage；
The operational amplifier includes,
First power end, for connecting the positive voltage；
Second source end, for connecting the negative supply voltage；
First input end, for connecting one first input signal；
Second input terminal, for connecting one second input signal；
Output terminal；
The differential amplifier circuit of a plurality of metal-oxide-semiconductor compositions, is controllably connected to first power end, the second source
Between end, the first input end, second input terminal and the output terminal, to first input signal and described
After second input signal progress differential amplification the benchmark earth signal is exported from the output terminal；
The charge pump circuit includes：
One switch control signal generation circuit, for generating one group of switch control signal；
One is provided with the operating circuit of storage capacitor, and including multiple switch branch, control terminal is produced with the switch control signal
Raw circuit connection, multiple switching branches act on lower combination turn-on and turn-off in the switch control signal, described to obtain
Negative supply voltage.
2. the system of anti-voltage impulse disturbances according to claim 1, which is characterized in that the differential amplifier circuit packet
It includes,
First NMOS tube, grid are connect with first input signal, and drain electrode connection one first crosses node, source electrode connection one
Second crosses node；
Second NMOS tube, grid are connect with second input signal, and drain electrode connects the output terminal, source electrode connection described the
Two cross node；
First PMOS tube, source electrode are connect with first power end, and drain electrode crosses Node connectedness, grid and institute with described first
State drain electrode connection；
Second PMOS tube, source electrode are connect with first power end, and drain electrode is connect with the output terminal, grid and described first
The grid connection of PMOS tube；
Third NMOS tube, grid connect a bias voltage, and source electrode is connect with the second source end, drain electrode connection described second
Cross node.
3. the system of anti-voltage impulse disturbances according to claim 1, which is characterized in that the operating circuit includes,
One Input voltage terminal is connect with an operating voltage；
One output voltage terminal；
First switch branch is connected between the Input voltage terminal and one first reference mode；
Second switch branch is connected between first reference mode and the first ground terminal；
Third switching branches are connected between the output voltage terminal and one second reference mode；
4th switching branches are connected between second reference mode and the second ground terminal；
One first storage capacitor is connected between first reference mode and second reference mode；
One second storage capacitor is connected between the output voltage terminal and first ground terminal；
When charge mode, the Input voltage terminal charges the operating circuit to first storage capacitor；
The operating circuit discharges when discharge mode from the first storage capacitor both ends to second storage capacitor.
4. the system of anti-voltage impulse disturbances according to claim 1, which is characterized in that the switch control signal generates
Circuit includes,
Comparator generates one in one second reference voltage and a sampling under the voltage feedback signal effect of the output voltage terminal
Comparison signal；
Control electrical appliances for electric charge pump generates the switch control signal under the action of the comparison signal.
5. the system of anti-voltage impulse disturbances according to claim 1, which is characterized in that the reference voltage generating circuit
Including,
One current source；
One resistor voltage divider circuit is series between the current source and the ground terminal；The resistor voltage divider circuit includes predetermined
Quantity and the divider resistance between the current source and the ground terminal is connected in series with each other, be connected between the divider resistance
The dot connect is into divider node；The reference voltage is drawn from scheduled divider node.
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| CN108132394A (en) * | 2017-11-28 | 2018-06-08 | 上海芯导电子科技有限公司 | A kind of micro-loading automatic detection circuit |
| CN108983066A (en) * | 2018-04-25 | 2018-12-11 | 上海芯导电子科技有限公司 | A kind of electric current automatic detection circuit |
| CN115542997B (en) * | 2022-11-30 | 2023-04-07 | 杭州芯耘光电科技有限公司 | Linear voltage regulator supporting bidirectional current and control method |
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| DE19608477A1 (en) * | 1995-03-10 | 1996-09-12 | Mitsubishi Electric Corp | MOS type semiconductor device with internal pseudo-ground potential generator circuit |
| CN1334555A (en) * | 2000-07-24 | 2002-02-06 | 夏普株式会社 | Liquid crystal display drive circuit, liquid crystal display and electronic device thereof |
| CN101102081A (en) * | 2006-07-05 | 2008-01-09 | 松下电器产业株式会社 | Semiconductor integrated circuit |
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| CN101394166A (en) * | 2008-10-28 | 2009-03-25 | 深圳市矽普特科技有限公司 | Triangle wave generating circuit, pulse width modulation circuit and audio power amplifying circuit |
| CN101907901A (en) * | 2009-06-05 | 2010-12-08 | 秉亮科技（苏州）有限公司 | Band gap circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7411381B2 (en) * | 2006-06-02 | 2008-08-12 | Broadcom Corporation | Circuit calibration using a time constant |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19608477A1 (en) * | 1995-03-10 | 1996-09-12 | Mitsubishi Electric Corp | MOS type semiconductor device with internal pseudo-ground potential generator circuit |
| CN1334555A (en) * | 2000-07-24 | 2002-02-06 | 夏普株式会社 | Liquid crystal display drive circuit, liquid crystal display and electronic device thereof |
| CN101102081A (en) * | 2006-07-05 | 2008-01-09 | 松下电器产业株式会社 | Semiconductor integrated circuit |
| CN101266223A (en) * | 2007-03-16 | 2008-09-17 | 天津工程师范学院 | Milk conductance dynamic on-line detection and milk amount metering system |
| CN101394166A (en) * | 2008-10-28 | 2009-03-25 | 深圳市矽普特科技有限公司 | Triangle wave generating circuit, pulse width modulation circuit and audio power amplifying circuit |
| CN101907901A (en) * | 2009-06-05 | 2010-12-08 | 秉亮科技（苏州）有限公司 | Band gap circuit |
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