CN105226766B - A kind of low noise bias device - Google Patents
A kind of low noise bias device Download PDFInfo
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- CN105226766B CN105226766B CN201510729381.1A CN201510729381A CN105226766B CN 105226766 B CN105226766 B CN 105226766B CN 201510729381 A CN201510729381 A CN 201510729381A CN 105226766 B CN105226766 B CN 105226766B
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Abstract
The invention provides a kind of low noise bias device, including charging circuit, low noise rechargable power supplies, low noise acoustic(al) switch, switch indication light, divider resistance, voltage tester port, testing current port, metal shell.The low noise bias device of the present invention, is charged using civil power for it, and can depart from civil power work, and low noise rechargable power supplies can provide ± 1.2V, ± 2.4V, ± 3.6V, ± 4.8V low noise voltage.The low noise metal switch and Ni-MH battery group that the low noise bias device of the present invention is selected cause Noise Background is received less than 1 to lie prostrate every square of hertz, and by low noise acoustic(al) switch and electric current, voltage tester port, realize test of the external test equipment to electric current, voltage in circuit.
Description
Technical field
The invention belongs to technical field of direct current power, and in particular to a kind of low noise bias device.
Background technology
Low-frequency noise characterizing method is semi-conducting material, the device performance exterior syndrome method discussed warmly in the world.This kind of method profit
With the low-frequency noise of bias device vitalizing semiconductor material, device inside, such as 1/f, g-r noise, low-frequency noise information, foundation are gathered
Corresponding physical model judges semi-conducting material, the quality of device performance.In low-frequency noise characterizing method, low-frequency noise is used as
The bias device of excitaton source has very important effect.
Because the low-frequency noise of semi-conducting material, device inside is very faint, to improve the precision of low frequency noise measurement, really
The reliability of test is protected, the noise jamming introduced during Noise Acquisition must be reduced as far as possible, such as bias device noise, amplifier are made an uproar
Sound, industrial frequency noise etc..Bias device is as Noise Acquisition system front end instrument, and its noise is the main next of whole system Noise Background
Source.In addition, 220V civil powers are widely used in each place, there is also certain shadow to low-frequency noise for its industrial frequency noise introduced
Ring, to reduce the influence of industrial frequency noise as far as possible, it is desirable to which bias device can depart from civil power work, while carrying out electromagnetic screen to bias device
Cover.When noise is characterized, semi-conducting material, the electric current of device, information of voltage must be acquired, to carry out study mechanism.Half
Conductor material, the electric current of device and information of voltage must could be gathered by accessing the test device of bias device internal circuit, therefore
Low noise bias device is needed to possess electric current and circuit for testing voltage module.
Because low-frequency noise characterizing method is still in conceptual phase, without the special low noise bias for such research
Device.Existing low noise bias device is basic to be made up of filtering and mu balanced circuit, by civil power is carried out filtering layer by layer and voltage stabilizing from
And stablized, the output voltage of low ripple, but such low noise bias device can not avoid the influence of civil power；While such
The Noise Background of bias device is more than the low-frequency noise background of semiconductor devices, easily floods the noise letter of tested semiconductor devices
Breath, it is impossible to for low-frequency noise characterizing method；And such bias device only possesses output current and voltage function, without electric current and electricity
Press test function.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of low noise bias device.
The low noise bias device of the present invention, including charging circuit, charge switch display lamp and metal shell.Described charging
Circuit includes charging inlet and charge member group.Described charging inlet is embedded on metal shell, and one end of charging inlet passes through
External charging wiring connects with 220V civil powers, and the other end is welded at charge member group access interface.Described charge member group
Low noise rechargable power supplies are supplied electricity to by 220V cities to charge.Described charge switch display lamp is lighted expression charging circuit and filled
Electricity, extinguishes and represents that charging circuit stops charging.Described metal shell, for encapsulating and protecting bias device circuit.It is characterized in,
The low noise bias device also include low noise rechargable power supplies, low noise acoustic(al) switch I, low noise acoustic(al) switch II, low noise acoustic(al) switch III,
Low noise acoustic(al) switch IV, low noise acoustic(al) switch V, voltage switch display lamp, divider resistance R, testing current port, voltage tester port
And Aviation Connector.
Described low noise rechargable power supplies, with many gear positive voltage groups and many gear negative voltage groups, many gear positive electricity
Pressure group is in parallel with many gear negative voltage groups, and one end of low noise rechargable power supplies passes through low noise acoustic(al) switch II and low noise acoustic(al) switch III
Connection, other end ground connection；
The described connection charging circuit of low noise acoustic(al) switch I and low noise rechargable power supplies, charging circuit can fill to low noise
Low noise acoustic(al) switch I is closed during electric power source charges, and low noise acoustic(al) switch I disconnects during complete charge；
The many gear positive voltage groups and many gear negative voltages of the described connection low noise rechargable power supplies of low noise acoustic(al) switch II
Group；
Described divider resistance R is used for partial pressure, prevents from carrying excessive on low noise rechargable power supplies when outer meeting resistance is too small
Voltage；
Described voltage switch display lamp, the break-make for indicating low noise acoustic(al) switch III, voltage switch display lamp lights table
Show low noise rechargable power supplies external output voltage；
Described testing current port, is embedded on metal shell, with 2 jacks, respectively testing current port jack I
With testing current port jack II, testing current port jack I and testing current port jack II correspond respectively to foreign current
The positive pole and negative pole of test equipment；
Described voltage tester port, is embedded on metal shell, with 2 jacks, respectively voltage tester port jack I
With voltage tester port jack II, voltage tester port jack I and voltage tester port jack II correspond respectively to external voltage
The positive pole and negative pole of test equipment；
Described Aviation Connector, is embedded on metal shell, with 8 jacks, and Aviation Connector jack III and Aviation Connector are inserted
The receptacle ground of hole IV, Aviation Connector jack V, Aviation Connector jack VI, Aviation Connector jack VII and Aviation Connector jack VIII are without even
Connect, Aviation Connector can be connected with outside adapter.
Described low noise acoustic(al) switch II（17）, low noise acoustic(al) switch III（14）With low noise acoustic(al) switch IV（16）It is closed at, it is low
Noise rechargable power supplies, divider resistance R, voltage switch display lamp（11）Formed after being sequentially connected conducting, connection external impressed current table
Testing current loop；Described low noise acoustic(al) switch IV（16）For the testing current loop that is turned on or off；
Described low noise acoustic(al) switch II（17）, low noise acoustic(al) switch III（14）With low noise acoustic(al) switch V（15）It is closed at, it is low
Noise rechargable power supplies, divider resistance R, voltage switch display lamp（11）Formed after being sequentially connected conducting, connection external voltage table
Voltage tester loop；Described low noise acoustic(al) switch V（15）For the voltage tester loop that is turned on or off.
Described charging inlet is embedded column joint.
Described low noise switching material is copper.
Described low noise rechargable power supplies are Ni-MH battery group.
Described many gear positive voltage groups are in series there is provided the positive voltage of 4 gears by four Ni-MH batteries, are respectively
1.2V, 2.4V, 3.6V and 4.8V；Described many gear negative voltage groups are in series by four Ni-MH batteries, and there is provided 4 gears
Negative voltage, is respectively -1.2V, -2.4V, -3.6V -4.8V；When low noise acoustic(al) switch II is closed, connect many gear positive voltage groups and
The gear of the same absolute value of many gear negative voltage groups.
Described divider resistance R resistances are 10k Ω.
Described testing current port, the hollow copper post that voltage tester port is 0.5 millimeter~3 millimeters of internal diameter.
Described low noise bias device can realize following 4 kinds of functions：
Low noise acoustic(al) switch II and low noise acoustic(al) switch III are closed at, and many gear positive voltage groups of low noise rechargable power supplies are with dividing
Piezoresistance R, voltage switch display lamp and Aviation Connector jack I are sequentially connected conducting, form positive voltage output；
Low noise acoustic(al) switch II and low noise acoustic(al) switch III are closed at, and many gear positive voltage groups of low noise rechargable power supplies are with dividing
Piezoresistance R, voltage switch display lamp and Aviation Connector jack II are sequentially connected conducting, form negative voltage output；
Low noise acoustic(al) switch II, low noise acoustic(al) switch III and low noise acoustic(al) switch IV are closed at, low noise rechargable power supplies, partial pressure
Resistance R, voltage switch display lamp form testing current loop after being sequentially connected conducting, connection external impressed current table；
Low noise acoustic(al) switch II, low noise acoustic(al) switch III and low noise acoustic(al) switch V are closed at, low noise rechargable power supplies, partial pressure
Resistance R, voltage switch display lamp form voltage tester loop after being sequentially connected conducting, connection external voltage table.
The low noise bias device of the present invention causes bias device to depart from civil power work by using charging circuit, reduces work
Influence of the frequency noise to low-frequency noise.From the Ni-MH battery group that Noise Background is low, voltage ripple is small, making an uproar for bias device is reduced
Sound background, it is ensured that the stability of low noise bias device output voltage.From the low metal switch of low-frequency noise background, further
Reduce bias device Noise Background so that Noise Background is received less than 1 lies prostrate every square of hertz.Pass through low noise acoustic(al) switch and electric current, electricity
Test port is pressed, test of the external test equipment to electric current, voltage in circuit is realized, the different electric current of precision, electricity can be connected
Pressing detecting device, under a variety of experimental conditions.
Brief description of the drawings
Fig. 1 is the circuit diagram of the low noise bias device of the present invention；
Fig. 2 is low noise bias device front panel schematic diagram of the invention；
Fig. 3 is low noise bias device rear board schematic diagram of the invention.
In figure, the low noise of 11. voltage switch display lamp, 12. charge switch display lamp, 13. low noise acoustic(al) switch I 14.
The low noise acoustic(al) switch II of III 15. low noise acoustic(al) switch of acoustic(al) switch, V 16. low noise acoustic(al) switch IV 17..
21. the voltage tester port jack of 22. Aviation Connector of charging inlet, 23. voltage tester port jack I 24.
The testing current port jack II of II 25. testing current port jack I 26..
Embodiment
Following examples are merely to illustrate the present invention, and not limitation of the present invention.Relevant person skilled in the art exists
It in the case of not departing from the spirit and scope of the present invention, can also make a variety of changes, replace and modification, therefore equal technology
Scheme falls within scope of the invention.
The present invention is described in detail with reference to the accompanying drawings and examples.
Embodiment 1
Fig. 1 is the circuit diagram of the low noise bias device of the present invention；Fig. 2 is low noise bias device front panel schematic diagram；
Fig. 3 is low noise bias device rear board schematic diagram.
Referring to Fig. 1, Fig. 2 and Fig. 3, low noise bias device of the invention, including charging circuit, the and of charge switch display lamp 12
Metal shell.Described charging circuit includes charging inlet 21 and charge member group.Described charging inlet 21 is embedded in outside metal
On shell, one end of charging inlet 21 is connected by external charging wiring with 220V civil powers, and the other end is welded in charge member group and connect
At inbound port.Described charge member group supplies electricity to low noise rechargable power supplies by 220V cities and charged.Described charge switch shows
Show that lamp 12 is lighted expression charging circuit and charged, extinguish and represent that charging circuit stops charging.Described metal shell, for sealing
Dress and protection bias device circuit.It is characterized in, the low noise bias device also includes low noise rechargable power supplies, low noise acoustic(al) switch
I 13, low noise acoustic(al) switch II 17, low noise acoustic(al) switch III 14, low noise acoustic(al) switch IV 16, low noise acoustic(al) switch V 15, voltage switch are shown
Lamp 11, divider resistance R, testing current port, voltage tester port and Aviation Connector 22.
Described low noise rechargable power supplies, with many gear positive voltage groups and many gear negative voltage groups, many gear positive electricity
Pressure group is in parallel with many gear negative voltage groups, and one end of low noise rechargable power supplies passes through low noise acoustic(al) switch II 17 and low noise acoustic(al) switch
III 14 connections, other end ground connection；
The described connection charging circuit of low noise acoustic(al) switch I 13 and low noise rechargable power supplies, charging circuit can to low noise
Low noise acoustic(al) switch I 13 is closed when charge power supply charges, and low noise acoustic(al) switch I 13 disconnects during complete charge；
The many gear positive voltage groups and many gear negative electricity of the described connection low noise rechargable power supplies of low noise acoustic(al) switch II 17
Pressure group；
Described divider resistance R is used for partial pressure, prevents from carrying excessive on low noise rechargable power supplies when outer meeting resistance is too small
Voltage；
Described voltage switch display lamp 11, the break-make for indicating low noise acoustic(al) switch III 14, voltage switch display lamp 11
Light expression low noise rechargable power supplies external output voltage；
Described testing current port, is embedded on metal shell, with 2 jacks, respectively testing current port jack I
25 and testing current port jack II 26, testing current port jack I 25 and testing current port jack II 26 are corresponded respectively to
The positive pole and negative pole of foreign current test equipment；
Described voltage tester port, is embedded on metal shell, with 2 jacks, respectively voltage tester port jack I
23 and voltage tester port jack II 24, voltage tester port jack I 23 and voltage tester port jack II 24 are corresponded respectively to
The positive pole and negative pole of external voltage test equipment；
Described Aviation Connector 22, is embedded on metal shell, with 8 jacks, and the jack III of Aviation Connector 22 and aviation connect
The first receptacle ground of 22 jack IV, the jack V of Aviation Connector 22, the jack VI of Aviation Connector 22, the jack VII of Aviation Connector 22 and aviation connect
First 22 jack VIII is connectionless, and Aviation Connector 22 can be connected with outside adapter.
Described charging inlet 21 is embedded column joint.
Described low noise switching material is copper.
Described low noise rechargable power supplies are Ni-MH battery group.
Described many gear positive voltage groups are in series there is provided the positive voltage of 4 gears by four Ni-MH batteries, are respectively
1.2V, 2.4V, 3.6V and 4.8V；Described many gear negative voltage groups are in series by four Ni-MH batteries, and there is provided 4 gears
Negative voltage, is respectively -1.2V, -2.4V, -3.6V and -4.8V；When low noise acoustic(al) switch II 17 is closed, many gear positive voltage groups are connected
With the gear of the same absolute value of many gear negative voltage groups.
Described divider resistance R resistances are 10k Ω.
Described testing current port, the hollow copper post that voltage tester port is 0.5 millimeter~3 millimeters of internal diameter.
Described low noise bias device can realize following 4 kinds of functions：
Low noise acoustic(al) switch II 17 and low noise acoustic(al) switch III 14 are closed at, many gear positive voltage groups of low noise rechargable power supplies
Conducting is sequentially connected with divider resistance R, voltage switch display lamp 11 and the jack I of Aviation Connector 22, positive voltage output is formed；
Low noise acoustic(al) switch II 17 and low noise acoustic(al) switch III 14 are closed at, many gear positive voltage groups of low noise rechargable power supplies
Conducting is sequentially connected with divider resistance R, voltage switch display lamp 11 and the jack II of Aviation Connector 22, negative voltage output is formed；
Low noise acoustic(al) switch II 17, low noise acoustic(al) switch III 14 and low noise acoustic(al) switch IV 16 are closed at, the chargeable electricity of low noise
Source, divider resistance R, voltage switch display lamp 11 form testing current loop after being sequentially connected conducting, connection external impressed current table；
Low noise acoustic(al) switch II 17, low noise acoustic(al) switch III 14 and low noise acoustic(al) switch V 15 are closed at, the chargeable electricity of low noise
Source, divider resistance R, voltage switch display lamp 11 form voltage tester loop after being sequentially connected conducting, connection external voltage table.
In Fig. 2, described low noise bias device front panel includes low noise acoustic(al) switch I 13, low noise acoustic(al) switch II 17, low noise
Switch III 14, low noise acoustic(al) switch IV 16, low noise acoustic(al) switch V 15, charge switch display lamp 12 and voltage switch display lamp 11.Fig. 3
In, described low noise bias device rear board includes charging inlet 21, Aviation Connector 22, testing current port, voltage tester end
Mouthful.
Low noise acoustic(al) switch I 13 is switch1, and low noise acoustic(al) switch II 17 is switch2, and low noise acoustic(al) switch III 14 is
Switch3, low noise acoustic(al) switch IV 16 is switch4, and low noise acoustic(al) switch V 15 is switch5.Charge switch display lamp 12 is
LED1, voltage switch display lamp 11 is LED2.Voltage tester port has 2 jacks, respectively voltage tester port jack I 23
With voltage tester port jack II 24, voltage tester port jack I 23 is denoted as V+, and voltage tester port jack II 24 is denoted as
V-, V+, V- jack correspond respectively to the positive pole and negative pole of external voltage test equipment；Testing current port has 2 jacks, point
Not Wei testing current port jack I 25 and testing current port jack II 26, testing current port jack I 25 is denoted as I+, electricity
Current test port jack II 26 is denoted as I-, and I+, I- correspond respectively to the positive pole and negative pole of foreign current test equipment.
On front panel, for the ease of human users, the function to switch has carried out explanatory note.Switch1 word
Illustrate for charging, switch2 explanatory note is that output voltage option, switch3 explanatory note are power supply, switch4
Explanatory note be testing current button, switch5 explanatory note is voltage tester button.
Switch1 is closed, and in the case that city is electrically accessed, LED1 is bright.
Switch2 has four options, respectively 1.2V, 2.4V, 3.6V, 4.8V, for example, when switch2 is pointed to
3.6V, output voltage is ± 3.6V.
Switch3 is closed, and LED2 is bright.
Switch4 has two options, respectively open and close.When switch4 sensings are opened, the testing current of open circuit is represented.
When switch4 points to pass, the testing current of halt circuit is represented.
Switch5 has three options, respectively V-, pass, V+.When switch5 is oriented to V-, many gear negative voltage groups are tested
Voltage.When switch5 is oriented to pass, without voltage tester.When switch5 is oriented to V+, the voltage of many gear positive voltage groups is tested.
On plate below, for the ease of human users, to charging inlet 21, Aviation Connector 22, testing current port, voltage
The function of test port has carried out explanatory note.The explanatory note of charging inlet 21 is AC 200-240V.The text of Aviation Connector 22
Word explanation is output.The explanatory note of voltage tester port is voltage tester port.The explanatory note of testing current port is electricity
Current test port.
Embodiment 1, switch1 disconnects, and LED1 goes out, and the jack III of Aviation Connector 22 and the jack of 22 jack of Aviation Connector IV connect
Ground, the jack V of Aviation Connector 22, the jack VI of Aviation Connector 22, the jack VII of Aviation Connector 22 and the jack VIII of Aviation Connector 22 are without even
Connect, switch2 and switch3 are closed at, switch4 and switch5 disconnect, many gear positive voltages of low noise rechargable power supplies
Group is sequentially connected conducting with divider resistance R, LED2 and the jack I of Aviation Connector 22, forms positive voltage output；The chargeable electricity of low noise
The many gear positive voltage groups in source are sequentially connected conducting with divider resistance R, LED2 and the jack II of Aviation Connector 22, form negative voltage defeated
Go out.Switch2 is rotated to 3.6V, and output voltage is ± 3.6V.
In the present embodiment, charging inlet 21 is embedded column joint；Low noise switching material is copper；switch1、
Switch4, switch5 are head-shaking switch；Switch2 and switch3 is rotary switch.
Embodiment 2
The structure of the present embodiment is same as Example 1.Except that switch2 is rotated to 1.2V, output voltage for ±
1.2V.Switch4 is closed, and low noise rechargable power supplies, divider resistance R, LED2 are sequentially connected after conducting, connection external impressed current table
Form testing current loop；Testing current port is 3 millimeters of hollow copper posts of internal diameter, and voltage tester port is that 3 millimeters of internal diameter is hollow
Copper post.
Embodiment 3
The structure of the present embodiment is same as Example 1.Except that switch2 is rotated to 2.4V, output voltage for ±
2.4V.Switch5 is closed, and points to V+, and low noise rechargable power supplies, divider resistance R, LED2 are sequentially connected conducting, connect external
Voltage tester loop is formed after voltmeter, the voltage of many gear positive voltage groups is tested.
Embodiment 4
The structure of the present embodiment is same as Example 3.Except that switch5 is closed, V- is pointed to, low noise can fill
Power supply, divider resistance R, LED2 form voltage tester loop after being sequentially connected conducting, connection external voltage table, test many gears
The voltage of negative voltage group.
Claims (7)
1. a kind of low noise bias device, including charging circuit, charge switch display lamp（12）And metal shell；Described charging electricity
Road includes charging inlet（21）With charge member group；Described charging inlet（21）It is embedded on metal shell, charging inlet（21）
One end connected by external charging wiring with 220V civil powers, the other end is welded at charge member group access interface；Described
Charge member group supplies electricity to low noise rechargable power supplies by 220V cities and charged；Described charge switch display lamp（12）Light expression
Charging circuit charges, and extinguishes and represents that charging circuit stops charging；Described metal shell, for encapsulating and protecting bias device
Circuit；Characterized in that, the low noise bias device also includes low noise rechargable power supplies, low noise acoustic(al) switch I（13）, low noise
Switch II（17）, low noise acoustic(al) switch III（14）, low noise acoustic(al) switch IV（16）, low noise acoustic(al) switch V（15）, voltage switch display lamp
（11）, divider resistance R, testing current port, voltage tester port and Aviation Connector（22）；
Described low noise rechargable power supplies, with many gear positive voltage groups and many gear negative voltage groups, many gear positive voltage groups
In parallel with many gear negative voltage groups, one end of low noise rechargable power supplies passes through low noise acoustic(al) switch II（17）With low noise acoustic(al) switch III
（14）Connection, other end ground connection；
Described low noise acoustic(al) switch I（13）Charging circuit and low noise rechargable power supplies are connected, charging circuit can fill to low noise
Low noise acoustic(al) switch I during electric power source charges（13）Closure, low noise acoustic(al) switch I during complete charge（13）Disconnect；
Described low noise acoustic(al) switch II（17）Connect many gear positive voltage groups and many gear negative voltages of low noise rechargable power supplies
Group；
Described divider resistance R is used for partial pressure, prevents from carrying excessive electricity when outer meeting resistance is too small on low noise rechargable power supplies
Pressure；
Described voltage switch display lamp（11）, for indicating low noise acoustic(al) switch III（14）Break-make, voltage switch display lamp
（11）Light expression low noise rechargable power supplies external output voltage；
Described testing current port, is embedded on metal shell, with 2 jacks, respectively testing current port jack I（25）
With testing current port jack II（26）, testing current port jack I（25）With testing current port jack II（26）It is right respectively
Should be in the positive pole and negative pole of foreign current test equipment；
Described voltage tester port, is embedded on metal shell, with 2 jacks, respectively voltage tester port jack I（23）
With voltage tester port jack II（24）, voltage tester port jack I（23）With voltage tester port jack II（24）It is right respectively
Should be in the positive pole and negative pole of external voltage test equipment；
Described Aviation Connector（22）, it is embedded on metal shell, with 8 jacks, Aviation Connector（22）Jack III and aviation connect
Head（22）The receptacle ground of jack IV, Aviation Connector（22）Jack V, Aviation Connector（22）Jack VI, Aviation Connector（22）Jack VII
And Aviation Connector（22）Jack VIII is connectionless, Aviation Connector（22）It can be connected with outside adapter；
Described low noise acoustic(al) switch II（17）, low noise acoustic(al) switch III（14）With low noise acoustic(al) switch IV（16）It is closed at, low noise
Rechargable power supplies, divider resistance R, voltage switch display lamp（11）Electric current is formed after being sequentially connected conducting, connection external impressed current table
Test loop；Described low noise acoustic(al) switch IV（16）For the testing current loop that is turned on or off；
Described low noise acoustic(al) switch II（17）, low noise acoustic(al) switch III（14）With low noise acoustic(al) switch V（15）It is closed at, low noise
Rechargable power supplies, divider resistance R, voltage switch display lamp（11）Voltage is formed after being sequentially connected conducting, connection external voltage table
Test loop；Described low noise acoustic(al) switch V（15）For the voltage tester loop that is turned on or off.
2. low noise bias device according to claim 1, it is characterised in that：Described charging inlet（21）For embedded circle
Column joint.
3. low noise bias device according to claim 1, it is characterised in that：Described low noise switching material is copper.
4. low noise bias device according to claim 1, it is characterised in that：Described low noise rechargable power supplies are ni-mh
Battery pack.
5. low noise bias device according to claim 1, it is characterised in that：Described many gear positive voltage groups are by four nickel
Hydrogen battery is in series, and there is provided the positive voltage of 4 gears, respectively 1.2V, 2.4,3.6V and 4.8V；Described many gear negative electricity
Pressure group is in series there is provided the negative voltage of 4 gears by four Ni-MH batteries, be respectively -1.2V, -2.4V, -3.6V -
4.8V；Low noise acoustic(al) switch II（17）During closure, the same absolute value of many gear positive voltage groups and many gear negative voltage groups is connected
Gear.
6. low noise bias device according to claim 1, it is characterised in that：Described divider resistance R resistances are 10k Ω.
7. low noise bias device according to claim 1, it is characterised in that：Described testing current port, voltage tester
Port is the hollow copper post of 0.5 millimeter~3 millimeters of internal diameter.
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| CN109085788A (en) * | 2018-10-12 | 2018-12-25 | 湖北视拓光电科技有限公司 | A kind of low noise voltage conditioned circuit and system |
| CN110501623A (en) * | 2019-08-29 | 2019-11-26 | 北京航空航天大学 | A kind of implementation method of low noise LDO output noise test |
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