CN105226766A - A kind of low noise bias device - Google Patents
A kind of low noise bias device Download PDFInfo
- Publication number
- CN105226766A CN105226766A CN201510729381.1A CN201510729381A CN105226766A CN 105226766 A CN105226766 A CN 105226766A CN 201510729381 A CN201510729381 A CN 201510729381A CN 105226766 A CN105226766 A CN 105226766A
- Authority
- CN
- China
- Prior art keywords
- low noise
- voltage
- switch
- jack
- bias device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention provides a kind of low noise bias device, comprise charging circuit, low noise rechargable power supplies, low noise switch, switch indication light, divider resistance, voltage tester port, testing current port, metal shell.Low noise bias device of the present invention, utilize civil power to be its charging, and can depart from civil power work, low noise rechargable power supplies can provide the low noise voltage of ± 1.2V, ± 2.4V, ± 3.6V, ± 4.8V.The low noise metal switch that low noise bias device of the present invention is selected and Ni-MH battery group make Noise Background be less than 1 receive volt every square of hertz, and by low noise switch and electric current, voltage tester port, achieve the test of external testing equipment to electric current, voltage in circuit.
Description
Technical field
The invention belongs to technical field of direct current power, be specifically related to a kind of low noise bias device.
Background technology
Low-frequency noise characterizing method is semi-conducting material, the device performance illness that has not attacked the vital organs of the human body method discussed warmly in the world.This kind of method utilizes the low-frequency noise of bias device vitalizing semiconductor material, device inside, as 1/f, g-r noise, gathers low-frequency noise information, passes judgment on the quality of semi-conducting material, device performance according to corresponding physical model.In low-frequency noise characterizing method, the bias device as low-frequency noise excitaton source has very important effect.
Because the low-frequency noise of semi-conducting material, device inside is very faint, for improving the precision of low frequency noise measurement, guarantee the reliability of testing, the noise jamming introduced in Noise Acquisition process must be reduced as far as possible, as bias device noise, amplifier noise, industrial frequency noise etc.Bias device is as Noise Acquisition system front end instrument, and its noise is the main source of whole system Noise Background.In addition, 220V civil power is widely used in each place, and its industrial frequency noise introduced also exists certain impact to low-frequency noise, for reducing the impact of industrial frequency noise as far as possible, requires that bias device can depart from civil power work, carries out electromagnetic shielding simultaneously to bias device.When noise characterizes, must gather the electric current of semi-conducting material, device, information of voltage, in order to carry out study mechanism.The electric current of semi-conducting material, device and information of voltage could must be gathered by the testing apparatus of access bias device internal circuit, therefore need low noise bias device to possess electric current and circuit for testing voltage module.
Because low-frequency noise characterizing method is still in conceptual phase, there is no the special low noise bias device for such research.Existing low noise bias device is made up of filtering and voltage stabilizing circuit substantially, and by carrying out filtering layer by layer and voltage stabilizing to civil power thus obtaining output voltage that is stable, low ripple, but such low noise bias device cannot avoid the impact of civil power; The Noise Background of such bias device is greater than the low-frequency noise background of semiconductor device simultaneously, easily floods the noise information of tested semiconductor device, cannot be used for low-frequency noise characterizing method; And such bias device only possesses output current and voltage function, there is no electric current and voltage tester function.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of low noise bias device.
Low noise bias device of the present invention, comprises charging circuit, charge switch display lamp and metal shell.Described charging circuit comprises charging inlet and charge member group.Described charging inlet is embedded on metal shell, and one end of charging inlet is connected with 220V civil power by external charging wiring, and the other end is welded in charge member group access interface place.Described charge member group is charged to low noise rechargable power supplies by 220V civil power.Described charge switch display lamp is lighted and is represented that charging circuit charges, and extinguishes and represents that charging circuit stops charging.Described metal shell, for encapsulation and protection bias device circuit.Be characterized in, described low noise bias device also comprises low noise rechargable power supplies, low noise switch I, low noise switch II, low noise switch III, low noise switch IV, low noise switch V, voltage switch display lamp, divider resistance R, testing current port, voltage tester port and Aviation Connector.
Described low noise rechargable power supplies, there is many gears positive voltage group and many gears negative voltage group, many gears positive voltage group is in parallel with many gears negative voltage group, and one end of low noise rechargable power supplies is connected with low noise switch II or low noise switch III, in addition one end ground connection;
Described low noise switch I connects charging circuit and low noise rechargable power supplies, and when charging circuit charges to low noise rechargable power supplies, low noise switch I cuts out, and during complete charge, low noise switch I disconnects;
Described low noise switch II connects many gears positive voltage group and many gears negative voltage group of low noise rechargable power supplies;
Described divider resistance R is used for dividing potential drop, and when preventing outer meeting resistance too small, low noise can fill on point source and carry excessive voltage;
Described voltage switch display lamp, is used to indicate the break-make of low noise switch III, and voltage switch display lamp is lighted and represented low noise rechargable power supplies external output voltage;
Described testing current port, be embedded on metal shell, have 2 jacks, be respectively testing current port jack I and testing current port jack II, testing current port jack I and testing current port jack II correspond respectively to positive pole and the negative pole of foreign current testing equipment;
Described voltage tester port, be embedded on metal shell, have 2 jacks, be respectively voltage tester port jack I and voltage tester port jack II, voltage tester port jack I and voltage tester port jack II correspond respectively to positive pole and the negative pole of external voltage testing equipment;
Described Aviation Connector, be embedded on metal shell, there are 8 jacks, Aviation Connector jack III and Aviation Connector jack IV receptacle ground, Aviation Connector jack V, Aviation Connector jack VI, Aviation Connector jack VII and Aviation Connector jack VIII are without connection, and Aviation Connector can be connected with the adapter of outside.
Described charging inlet is embedded column joint.
Described low noise switching material is copper.
Described low noise rechargable power supplies is Ni-MH battery group.
Described many gears positive voltage group is in series by four Ni-MH batteries, provides the positive voltage of 4 gears, is respectively 1.2V, 2.4V, 3.6V and 4.8V; Described many gears negative voltage group is in series by four Ni-MH batteries, provides the negative voltage of 4 gears, is respectively-the 4.8V of-1.2V ,-2.4V ,-3.6V; When low noise switch II cuts out, connect the gear of the same absolute value of many gears positive voltage group and many gears negative voltage group.
Described divider resistance R resistance is 10k Ω.
Described testing current port, voltage tester port are the hollow copper post of internal diameter 0.5 millimeter ~ 3 millimeters.
Described low noise bias device can realize following 4 kinds of functions:
Low noise switch II and low noise switch III are closed simultaneously, and low noise rechargable power supplies many gears positive voltage group is connected conducting successively with divider resistance R, voltage switch display lamp and Aviation Connector jack I, form positive voltage and export;
Low noise switch II and low noise switch III are closed simultaneously, and low noise rechargable power supplies many gears positive voltage group is connected conducting successively with divider resistance R, voltage switch display lamp and Aviation Connector jack II, form negative voltage and export;
Low noise switch II, low noise switch III and low noise switch IV are closed simultaneously, and low noise rechargable power supplies, divider resistance R, voltage switch display lamp connect conducting successively, form testing current loop after connecting external impressed current table;
Low noise switch II, low noise switch III and low noise switch V are closed simultaneously, and low noise rechargable power supplies, divider resistance R, voltage switch display lamp connect conducting successively, coating-forming voltage test loop after connection external voltage table.
Low noise bias device of the present invention makes bias device can depart from civil power work by using charging circuit, reduces the impact of industrial frequency noise on low-frequency noise.Select the Ni-MH battery group that Noise Background is low, voltage ripple is little, reduce the Noise Background of bias device, ensure that the stability of low noise bias device output voltage.Select the metal switch that low-frequency noise background is low, reduce further bias device Noise Background, make Noise Background be less than 1 receive volt every square of hertz.By low noise switch and electric current, voltage tester port, achieve the test of external testing equipment to electric current, voltage in circuit, the different electric current of precision, voltage tester equipment can be connected, under multiple experimental condition.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of low noise bias device of the present invention;
Fig. 2 is low noise bias device front panel schematic diagram of the present invention;
Fig. 3 is low noise bias device rear board schematic diagram of the present invention.
In figure, 11. voltage switch display lamp 12. charge switch display lamp 13. low noise switch I 14. low noise switch III 15. low noise switch V 16. low noise switch IV 17. low noise switches II.
21. charging inlet 22. Aviation Connector 23. voltage tester port jack I 24. voltage tester port jack II 25. testing current port jack I 26. testing current port jacks II.
Embodiment
Following examples only for illustration of the present invention, and are not limitation of the present invention.Without departing from the spirit and scope of the present invention, can also make a variety of changes, replace and modification, therefore equal technical scheme also belongs to category of the present invention to the personnel of relevant technical field.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Embodiment 1
Fig. 1 is the circuit diagram of 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.
See Fig. 1, Fig. 2 and Fig. 3, low noise bias device of the present invention, comprises charging circuit, charge switch display lamp 12 and metal shell.Described charging circuit comprises charging inlet 21 and charge member group.Described charging inlet 21 is embedded on metal shell, and one end of charging inlet 21 is connected with 220V civil power by external charging wiring, and the other end is welded in charge member group access interface place.Described charge member group is charged to low noise rechargable power supplies by 220V civil power.Described charge switch display lamp 12 is lighted and is represented that charging circuit charges, and extinguishes and represents that charging circuit stops charging.Described metal shell, for encapsulation and protection bias device circuit.Be characterized in, described low noise bias device also comprises low noise rechargable power supplies, low noise switch I 13, low noise switch II 17, low noise switch III 14, low noise switch IV 16, low noise 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, there is many gears positive voltage group and many gears negative voltage group, many gears positive voltage group is in parallel with many gears negative voltage group, and one end of low noise rechargable power supplies is connected with low noise switch II 17 or low noise switch III 14, in addition one end ground connection;
Described low noise switch I 13 connects charging circuit and low noise rechargable power supplies, and when charging circuit charges to low noise rechargable power supplies, low noise switch I 13 cuts out, and during complete charge, low noise switch I 13 disconnects;
Described low noise switch II 17 connects many gears positive voltage group and many gears negative voltage group of low noise rechargable power supplies;
Described divider resistance R is used for dividing potential drop, and when preventing outer meeting resistance too small, low noise can fill on point source and carry excessive voltage;
Described voltage switch display lamp 11, is used to indicate the break-make of low noise switch III 14, and voltage switch display lamp 11 is lighted and represented low noise rechargable power supplies external output voltage;
Described testing current port, be embedded on metal shell, have 2 jacks, be 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 correspond respectively to positive pole and the negative pole of foreign current testing equipment;
Described voltage tester port, be embedded on metal shell, have 2 jacks, be 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 correspond respectively to positive pole and the negative pole of external voltage testing equipment;
Described Aviation Connector 22, be embedded on metal shell, there are 8 jacks, Aviation Connector 22 jack III and Aviation Connector 22 jack IV receptacle ground, Aviation Connector 22 jack V, Aviation Connector 22 jack VI, Aviation Connector 22 jack VII and Aviation Connector 22 jack VIII are without connection, and Aviation Connector 22 can be connected with the adapter of outside.
Described charging inlet 21 is embedded column joint.
Described low noise switching material is copper.
Described low noise rechargable power supplies is Ni-MH battery group.
Described many gears positive voltage group is in series by four Ni-MH batteries, provides the positive voltage of 4 gears, is respectively 1.2V, 2.4V, 3.6V and 4.8V; Described many gears negative voltage group is in series by four Ni-MH batteries, provides the negative voltage of 4 gears, is respectively-1.2V ,-2.4V ,-3.6V and-4.8V; When low noise switch II 17 cuts out, connect the gear of the same absolute value of many gears positive voltage group and many gears negative voltage group.
Described divider resistance R resistance is 10k Ω.
Described testing current port, voltage tester port are the hollow copper post of internal diameter 0.5 millimeter ~ 3 millimeters.
Described low noise bias device can realize following 4 kinds of functions:
Low noise switch II 17 and low noise switch III 14 are closed simultaneously, and low noise rechargable power supplies many gears positive voltage group is connected conducting successively with divider resistance R, voltage switch display lamp 11 and Aviation Connector 22 jack I, form positive voltage and export;
Low noise switch II 17 and low noise switch III 14 are closed simultaneously, and low noise rechargable power supplies many gears positive voltage group is connected conducting successively with divider resistance R, voltage switch display lamp 11 and Aviation Connector 22 jack II, form negative voltage and export;
Low noise switch II 17, low noise switch III 14 and low noise switch IV 16 are closed simultaneously, and low noise rechargable power supplies, divider resistance R, voltage switch display lamp 11 connect conducting successively, form testing current loop after connecting external impressed current table;
Low noise switch II 17, low noise switch III 14 and low noise switch V 15 are closed simultaneously, and low noise rechargable power supplies, divider resistance R, voltage switch display lamp 11 connect conducting successively, coating-forming voltage test loop after connection external voltage table.
In Fig. 2, described low noise bias device front panel comprises low noise switch I 13, low noise switch II 17, low noise switch III 14, low noise switch IV 16, low noise switch V 15, charge switch display lamp 12 and voltage switch display lamp 11.In Fig. 3, described low noise bias device rear board comprises charging inlet 21, Aviation Connector 22, testing current port, voltage tester port.
Low noise switch I 13 is switch1, and low noise switch II 17 is switch2, and low noise switch III 14 is switch3, and low noise switch IV 16 is switch4, and low noise switch V 15 is switch5.Charge switch display lamp 12 is LED1, and voltage switch display lamp 11 is LED2.Voltage tester port has 2 jacks, be respectively voltage tester port jack I 23 and voltage tester port jack II 24, voltage tester port jack I 23 is denoted as V+, voltage tester port jack II 24 is denoted as V-, and V+, V-jack corresponds respectively to positive pole and the negative pole of external voltage testing equipment; Testing current port has 2 jacks, be respectively testing current port jack I 25 and testing current port jack II 26, testing current port jack I 25 is denoted as I+, and testing current port jack II 26 is denoted as I-, and I+, I-correspond respectively to positive pole and the negative pole of foreign current testing equipment.
On front panel, for the ease of human users, explanatory note is carried out to the function of switch.The explanatory note of switch1 is charging, and the explanatory note of switch2 is output voltage option, the explanatory note of switch3 is power supply, the explanatory note of switch4 is testing current button, and the explanatory note of switch5 is voltage tester button.
Switch1 closes, and when civil power access, LED1 is bright.
Switch2 has four options, is respectively 1.2V, 2.4V, 3.6V, 4.8V, illustrates, when switch2 points to 3.6V, output voltage is ± 3.6V.
Switch3 closes, and LED2 is bright.
Switch4 has two options, is respectively open and close.When switch4 points to and opens, represent the testing current of open circuit.When switch4 points to and closes, represent the testing current of halt circuit.
Switch5 has three options, is respectively V-, pass, V+.During switch5 guiding V-, test the voltage of many gears negative voltage group.When switch5 guiding is closed, do not carry out voltage tester.During switch5 guiding V+, test the voltage of many gears positive voltage group.
On plate below, for the ease of human users, explanatory note is carried out to the function of charging inlet 21, Aviation Connector 22, testing current port, voltage tester port.The explanatory note of charging inlet 21 is AC200-240V.The explanatory note of Aviation Connector 22 is for exporting.The explanatory note of voltage tester port is voltage tester port.The explanatory note of testing current port is testing current port.
Embodiment 1, switch1 disconnects, LED1 goes out, Aviation Connector 22 jack III and Aviation Connector 22 jack IV receptacle ground, Aviation Connector 22 jack V, Aviation Connector 22 jack VI, Aviation Connector 22 jack VII and Aviation Connector 22 jack VIII are without connection, switch2 and switch3 closes simultaneously, switch4 and switch5 disconnects, low noise rechargable power supplies many gears positive voltage group is connected conducting successively with divider resistance R, LED2 and Aviation Connector 22 jack I, forms positive voltage and exports; Low noise rechargable power supplies many gears positive voltage group is connected conducting successively with divider resistance R, LED2 and Aviation Connector 22 jack II, forms negative voltage and exports.Switch2 rotates 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 identical with embodiment 1.Difference is, switch2 rotates to 1.2V, and output voltage is ± 1.2V.Switch4 closes, and low noise rechargable power supplies, divider resistance R, LED2 connect conducting successively, forms testing current loop after connecting external impressed current table; Testing current port is internal diameter 3 millimeters of hollow copper posts, and voltage tester port is internal diameter 3 millimeters of hollow copper posts.
Embodiment 3
The structure of the present embodiment is identical with embodiment 1.Difference is, switch2 rotates to 2.4V, and output voltage is ± 2.4V.Switch5 closes, and point to V+, low noise rechargable power supplies, divider resistance R, LED2 connect conducting successively, and coating-forming voltage test loop after connection external voltage table, tests the voltage of many gears positive voltage group.
Embodiment 4
The structure of the present embodiment is identical with embodiment 3.Difference is, switch5 closes, and point to V-, low noise rechargable power supplies, divider resistance R, LED2 connect conducting successively, and coating-forming voltage test loop after connection external voltage table, tests the voltage of many gears negative voltage group.
Claims (7)
1. a low noise bias device, comprises charging circuit, charge switch display lamp (12) and metal shell; Described charging circuit comprises charging inlet (21) and charge member group; Described charging inlet (21) is embedded on metal shell, and one end of charging inlet (21) is connected with 220V civil power by external charging wiring, and the other end is welded in charge member group access interface place; Described charge member group is charged to low noise rechargable power supplies by 220V civil power; Described charge switch display lamp (12) is lighted and is represented that charging circuit charges, and extinguishes and represents that charging circuit stops charging; Described metal shell, for encapsulation and protection bias device circuit; It is characterized in that, described low noise bias device also comprises low noise rechargable power supplies, low noise switch I (13), low noise switch II (17), low noise switch III (14), low noise switch IV (16), low noise 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, there is many gears positive voltage group and many gears negative voltage group, many gears positive voltage group is in parallel with many gears negative voltage group, and one end of low noise rechargable power supplies is connected with low noise switch II (17) or low noise switch III (14), one end ground connection in addition;
Described low noise switch I (13) connects charging circuit and low noise rechargable power supplies, and when charging circuit charges to low noise rechargable power supplies, low noise switch I (13) cuts out, and during complete charge, low noise switch I (13) disconnects;
Described low noise switch II (17) connects many gears positive voltage group and many gears negative voltage group of low noise rechargable power supplies;
Described divider resistance R is used for dividing potential drop, and when preventing outer meeting resistance too small, low noise can fill on point source and carry excessive voltage;
Described voltage switch display lamp (11), is used to indicate the break-make of low noise switch III (14), and voltage switch display lamp (11) is lighted and represented low noise rechargable power supplies external output voltage;
Described testing current port, be embedded on metal shell, there are 2 jacks, be 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) correspond respectively to positive pole and the negative pole of foreign current testing equipment;
Described voltage tester port, be embedded on metal shell, there are 2 jacks, be 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) correspond respectively to positive pole and the negative pole of external voltage testing equipment;
Described Aviation Connector (22), be embedded on metal shell, there are 8 jacks, Aviation Connector (22) jack III and Aviation Connector (22) jack IV receptacle ground, Aviation Connector (22) jack V, Aviation Connector (22) jack VI, Aviation Connector (22) jack VII and Aviation Connector (22) jack VIII are without connection, and Aviation Connector (22) can be connected with the adapter of outside.
2. low noise bias device according to claim 1, is characterized in that: described charging inlet (21) is embedded column joint.
3. low noise bias device according to claim 1, is characterized in that: described low noise switching material is copper.
4. low noise bias device according to claim 1, is characterized in that: described low noise rechargable power supplies is Ni-MH battery group.
5. low noise bias device according to claim 1, is characterized in that: described many gears positive voltage group is in series by four Ni-MH batteries, provides the positive voltage of 4 gears, be respectively 1.2V, 2.4,3.6V and 4.8V; Described many gears negative voltage group is in series by four Ni-MH batteries, provides the negative voltage of 4 gears, is respectively-the 4.8V of-1.2V ,-2.4V ,-3.6V; When low noise switch II (17) cuts out, connect the gear of the same absolute value of many gears positive voltage group and many gears negative voltage group.
6. low noise bias device according to claim 1, is characterized in that: described divider resistance R resistance is 10k Ω.
7. low noise bias device according to claim 1, is characterized in that: described testing current port, voltage tester port are the hollow copper post of internal diameter 0.5 millimeter ~ 3 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510729381.1A CN105226766B (en) | 2015-11-02 | 2015-11-02 | A kind of low noise bias device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510729381.1A CN105226766B (en) | 2015-11-02 | 2015-11-02 | A kind of low noise bias device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105226766A true CN105226766A (en) | 2016-01-06 |
| CN105226766B CN105226766B (en) | 2017-08-18 |
Family
ID=54995553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510729381.1A Expired - Fee Related CN105226766B (en) | 2015-11-02 | 2015-11-02 | A kind of low noise bias device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105226766B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201674393U (en) * | 2010-06-04 | 2010-12-15 | 西安电子科技大学 | Ultralow noise high-precision stepped regulation direct-current bias power device |
| CN102591388A (en) * | 2011-11-04 | 2012-07-18 | 中国科学院紫金山天文台 | Direct current bias source for superconductor detector |
| CN104272121A (en) * | 2012-03-20 | 2015-01-07 | 橙色音乐电子有限公司 | Thermionic valve tester |
| CN204462342U (en) * | 2015-02-15 | 2015-07-08 | 广州粤能电力科技开发有限公司 | Battery performance test conversion equipment |
| WO2015108755A1 (en) * | 2014-01-17 | 2015-07-23 | Qualcomm Incorporated | Temperature dependent amplifier biasing |
| CN205081518U (en) * | 2015-11-02 | 2016-03-09 | 中国工程物理研究院核物理与化学研究所 | Low noise biasing ware |
-
2015
- 2015-11-02 CN CN201510729381.1A patent/CN105226766B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201674393U (en) * | 2010-06-04 | 2010-12-15 | 西安电子科技大学 | Ultralow noise high-precision stepped regulation direct-current bias power device |
| CN102591388A (en) * | 2011-11-04 | 2012-07-18 | 中国科学院紫金山天文台 | Direct current bias source for superconductor detector |
| CN104272121A (en) * | 2012-03-20 | 2015-01-07 | 橙色音乐电子有限公司 | Thermionic valve tester |
| WO2015108755A1 (en) * | 2014-01-17 | 2015-07-23 | Qualcomm Incorporated | Temperature dependent amplifier biasing |
| CN204462342U (en) * | 2015-02-15 | 2015-07-08 | 广州粤能电力科技开发有限公司 | Battery performance test conversion equipment |
| CN205081518U (en) * | 2015-11-02 | 2016-03-09 | 中国工程物理研究院核物理与化学研究所 | Low noise biasing ware |
Non-Patent Citations (1)
| Title |
|---|
| 陈文豪: "电子元器件低频电噪声测试技术及应用研究", 《中国博士学位论文全文数据库 信息科技辑（月刊）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105226766B (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105978106B (en) | The equalization charging circuit and its device of series-connected cell | |
| CN103454554B (en) | Polarity tester for current transformer | |
| CN201804072U (en) | Polarity test instrument for current transformer | |
| CN203502540U (en) | Current transformer polarity tester | |
| CN104569772B (en) | Electric high-voltage direct-current insulation detection circuit and method | |
| CN103592306B (en) | A kind of adjustable high voltage large scale bubble formation device | |
| CN205081518U (en) | Low noise biasing ware | |
| CN202815197U (en) | Aging test device for LED lamp | |
| CN107677915A (en) | Use mutual inductor polarity measurement apparatus and its measuring method in Portable metering scene | |
| CN203011948U (en) | Current transformer characteristic test secondary connection device | |
| CN105226766A (en) | A kind of low noise bias device | |
| CN101504429B (en) | Portable on-line measurement instrument for electrician electric bridge drain voltage | |
| CN207263841U (en) | A kind of lithium battery protection board electric discharge overcurrent protection test device | |
| CN208969215U (en) | A kind of analog power that circuit is realized | |
| CN209070021U (en) | A kind of capacitance test circuit | |
| CN104101810B (en) | A kind of testing circuit based on LED group and detector | |
| CN207502691U (en) | A kind of battery off-line test apparatus and system | |
| CN205911778U (en) | Series battery's equalizing charge circuit and device thereof | |
| CN206074753U (en) | A kind of dry-type air-core reactor turn-to-turn insulation overvoltage checks circuit | |
| CN104749480B (en) | One kind is used for relay protection secondary circuit whole group polarity test device | |
| CN204680285U (en) | A kind of demonstration instrument for teaching probing into capacitor charging and discharging | |
| CN206920540U (en) | A kind of integration test device of analog DC system integration type earth fault | |
| CN208752157U (en) | Portable high-pressure direct current cabinet PDU socket detector | |
| CN203133177U (en) | Electric megohmmeter capable of resisting interference of strong electric field in power delivery line | |
| Zhang et al. | Research on non-contact voltage measurement technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170818 Termination date: 20191102 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |