CN207895748U - A kind of experimental plate with two-stage amplifying circuit - Google Patents
A kind of experimental plate with two-stage amplifying circuit Download PDFInfo
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- CN207895748U CN207895748U CN201721245696.XU CN201721245696U CN207895748U CN 207895748 U CN207895748 U CN 207895748U CN 201721245696 U CN201721245696 U CN 201721245696U CN 207895748 U CN207895748 U CN 207895748U
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- 238000012360 testing method Methods 0.000 claims abstract description 187
- 239000003990 capacitor Substances 0.000 claims abstract description 30
- 230000005611 electricity Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 description 28
- 238000003199 nucleic acid amplification method Methods 0.000 description 28
- 239000000523 sample Substances 0.000 description 20
- 230000006870 function Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Abstract
The utility model is related to a kind of experimental plates with two-stage amplifying circuit, belong to analog electronics technique field.The utility model includes 14 test leads, electrolytic capacitor C1, C2, C3, C4, resistance R1, R2, R3, R4, R5, R6, R7, R8, potentiometer Rw1, Rw2, triode T1, T2；Further include two 2 test leads, Rf, forms negative-feedback two-stage amplifying circuit.The utility model solves student when carrying out two-stage amplifying circuit and negative feedback amplifier circuit is tested, by component is more, circuit is complicated and lack experience and the generation that causes built circuit the failures such as short circuit, open circuit or component damage occur, decline so as to cause the learning initiative of student, and specified experimental duties cannot be completed within required class hours and influence teaching process, the utility model can be timely completed experimental duties within required class hours, and the study content management of student is made to be improved.
Description
Technical field
The utility model is related to a kind of experimental plates with two-stage amplifying circuit, belong to analog electronics technique field.
Background technology
In Analog Electronics Technique Experiment room, student when carrying out two-stage amplifying circuit and negative feedback amplifier circuit and testing,
It needs to build circuit on bread board according to circuit diagram, since component is more, circuit is complicated and lacks experience and causes
The generation that the failures such as short circuit, open circuit or component damage occurs in the circuit built takes time and effort during malfunction elimination,
Decline so as to cause the learning initiative of student, and specified experimental duties cannot be completed within required class hours and influence to impart knowledge to students into
Degree.
Invention content
The technical problems to be solved in the utility model is：The utility model provides a kind of experiment with two-stage amplifying circuit
Plate solves student when carrying out two-stage amplifying circuit and negative feedback amplifier circuit and testing, due to component is more, circuit is complicated,
And the generation of the failures such as built circuit appearance short circuit, open circuit or component damage is lacked experience and causes, so as to cause
Raw learning initiative declines, and cannot complete specified experimental duties within required class hours and influence teaching process.
Technical solutions of the utility model are：A kind of experimental plate with two-stage amplifying circuit, including 14 test leads, electrolysis electricity
Hold C1, C2, C3, C4, resistance R1, R2, R3, R4, R5, R6, R7, R8, potentiometer Rw1, Rw2, triode T1, T2；
The test lead 1 is connect with the cathode of electrolytic capacitor C1, and the anode of electrolytic capacitor C1 passes through resistance R2 and test lead 2
The anode of connection, electrolytic capacitor C1 is connect with the base stage of triode T1, and the base stage of triode T1 passes sequentially through resistance R1, potentiometer
Rw1 is connect with test lead 14, and the collector of triode T1 is connect with test lead 3, and test lead 3 is connected by resistance R3 and test lead 14
It connects, test lead 3 is connect with the anode of electrolytic capacitor C2, and the cathode of electrolytic capacitor C2 is connect with test lead 5, the transmitting of triode T1
Pole is connect with test lead 4, and test lead 4 is connect by resistance R4 with test lead 2；Test lead 14 passes sequentially through potentiometer Rw2, resistance
R5 is connect with the base stage of test lead 6, triode T2 simultaneously, and the base stage of triode T2 is connect by resistance R6 with test lead 2, three poles
The collector of pipe T2 is connect with test lead 8, and test lead 8 is connect by resistance R7 with test lead 14, test lead 8 and electrolytic capacitor C3
Anode connection, the cathode of electrolytic capacitor C3 connect with test lead 10, and the emitter of triode T2 is connect with test lead 9, tests
End 9 and in parallel simultaneously resistance R8, electrolytic capacitor C4 between test lead 2, test lead 11, the anode and test lead 9 of electrolytic capacitor C4
Connection, test lead 12 are connect by resistance RL with test lead 13, and+12V power ends are connect with test lead 14, ground terminal and test lead
2 connections, test lead 5 are connect with test lead 6.
The utility model further includes two 2 test leads, Rf, forms negative-feedback two-stage amplifying circuit；Test lead 15 is logical
Resistance Rf is crossed to connect with test lead 16；Test lead 9 is connect with test lead 14, and test lead 15 is connect with test lead 4, test lead 16 with
Test lead 10 connects.
The working process of the utility model is as follows：
A1, setting quiescent point：Power on, the gear of multimeter is pushed into DC voltage shelves, and by its red test pencil
Test lead 3 is accessed, black meter pen accesses test lead 4, makes the voltage of triode T1 collector and emitters by adjusting potentiometer Rw1
Uce1=5.4V；Then, test lead 8 and by its red test pencil is accessed, black meter pen accesses test lead 9, makes by adjusting potentiometer Rw2
Voltage Uce2=4.8V of triode T2 collector and emitters；
A2, when non-loaded, measure the amplification factor with two-stage amplifying circuit experimental plate：
Ui=5mV, the sinusoidal signal of f=1kHZ, i.e. function hair is added in the input terminal of the experimental plate with function generator
The anode access test lead 1 of raw device, cathode access test lead 2 and are added ui=5mV, the sinusoidal signal of f=1kHZ, then by oscillograph
The anode probe access test lead 6 in the channels CH1, the cathode probe access test lead 7 in the channels CH1, adjusts oscillograph, oscillograph
The waveform of level-one amplification output, i.e. output waveform between test lead 6 and test lead 7 are shown on display panel, you can obtain one
The amplification factor of grade amplifying circuit；The anode probe access test lead 10 in the channels oscillograph CH2, the cathode probe in the channels CH2 connect
Enter test lead 11, adjust oscillograph, the waveform of two level amplification output, i.e. test lead 10 and survey are shown on the display panel of oscillograph
Try the output waveform between end 11, you can obtain the amplification factor of second amplifying circuit；Meanwhile the anode of ac millivoltmeter being visited
Head access test lead 10, cathode probe access test lead 11 measures output voltage Auo2, to which total amplification factor be calculated
Auo=Auo2/ui；
A3, when loaded measures the amplification factor with two-stage amplifying circuit experimental plate：
Test lead 10 is connect with test lead 12 with conducting wire, test lead 11 is connect with test lead 13, is existed with function generator
Ui=5mV is added in the input terminal of the experimental plate, and the anode of the sinusoidal signal of f=1kHZ, i.e. function generator accesses test lead 1,
Cathode accesses test lead 2 and ui=5mV, the sinusoidal signal of f=1kHZ is added, then the anode probe access in the channels oscillograph CH1 is surveyed
End 6 is tried, the cathode probe access test lead 7 in the channels CH1 adjusts oscillograph, shows that level-one is amplified on the display panel of oscillograph
Output waveform between the waveform of output, i.e. test lead 6 and test lead 7, you can obtain the amplification factor of level-one amplifying circuit；Show
The anode probe access test lead 10 in the channels wave device CH2, the cathode probe access test lead 11 in the channels CH2, adjusts oscillograph, shows
The waveform of two level amplification output, i.e. output waveform between test lead 10 and test lead 11 are shown on the display panel of wave device, i.e.,
The amplification factor of second amplifying circuit can be obtained；Meanwhile by the anode probe access test lead 10 of ac millivoltmeter, cathode is popped one's head in
Access test lead 11 measures output voltage Buo2, to which total amplification factor Buo=Buo2/ui be calculated.
The utility model has the beneficial effects that：The utility model is by designing circuit and making pcb board, by scattered electronics
Component welds on circuit boards, and reserves and correspondingly tests stomidium, convenient for by other experimental facilities insert experiment plates and right
The experimental circuit carries out parameter testing, and student need to only be connected the circuit on experimental plate by conducting wire according to experimental principle figure, and
Insert experiment equipment carries out relevant Experiment of Electrical Circuits, and records test result, and teacher carries out according to the test result of student to it
Scoring, to improve quality of instruction, avoids the generation of teaching accident.
Description of the drawings
Fig. 1 is the utility model circuit diagram.
Each label in Fig. 1：1~16- test leads, C1~C4- electrolytic capacitors, R1~R8- resistance, Rf- resistance, Rw1~
Rw2- potentiometers, T1~T2- triodes.
Specific implementation mode
Utility model will be further explained below with reference to the attached drawings and specific embodiments.
Embodiment 1：As shown in Figure 1, a kind of experimental plate with two-stage amplifying circuit, including 14 test leads, electrolytic capacitors
C1, C2, C3, C4, resistance R1, R2, R3, R4, R5, R6, R7, R8, potentiometer Rw1, Rw2, triode T1, T2；
The test lead 1 is connect with the cathode of electrolytic capacitor C1, and the anode of electrolytic capacitor C1 passes through resistance R2 and test lead 2
The anode of connection, electrolytic capacitor C1 is connect with the base stage of triode T1, and the base stage of triode T1 passes sequentially through resistance R1, potentiometer
Rw1 is connect with test lead 14, and the collector of triode T1 is connect with test lead 3, and test lead 3 is connected by resistance R3 and test lead 14
It connects, test lead 3 is connect with the anode of electrolytic capacitor C2, and the cathode of electrolytic capacitor C2 is connect with test lead 5, the transmitting of triode T1
Pole is connect with test lead 4, and test lead 4 is connect by resistance R4 with test lead 2；Test lead 14 passes sequentially through potentiometer Rw2, resistance
R5 is connect with the base stage of test lead 6, triode T2 simultaneously, and the base stage of triode T2 is connect by resistance R6 with test lead 2, three poles
The collector of pipe T2 is connect with test lead 8, and test lead 8 is connect by resistance R7 with test lead 14, test lead 8 and electrolytic capacitor C3
Anode connection, the cathode of electrolytic capacitor C3 connect with test lead 10, and the emitter of triode T2 is connect with test lead 9, tests
End 9 and in parallel simultaneously resistance R8, electrolytic capacitor C4 between test lead 2, test lead 11, the anode and test lead 9 of electrolytic capacitor C4
Connection, test lead 12 are connect by resistance RL with test lead 13, and+12V power ends are connect with test lead 14, ground terminal and test lead
2 connections, test lead 5 are connect with test lead 6.
Further, the utility model further includes two 2 test leads, Rf, forms negative-feedback two-stage amplifying circuit；It surveys
Examination end 15 is connect by resistance Rf with test lead 16；Test lead 9 is connect with test lead 14, and test lead 15 is connect with test lead 4, is surveyed
Examination end 16 is connect with test lead 10.
The working process of the utility model is as follows：
A1, setting quiescent point：Power on, the gear of multimeter is pushed into DC voltage shelves, and by its red test pencil
Test lead 3 is accessed, black meter pen accesses test lead 4, makes the voltage of triode T1 collector and emitters by adjusting potentiometer Rw1
Uce1=5.4V；Then, test lead 8 and by its red test pencil is accessed, black meter pen accesses test lead 9, makes by adjusting potentiometer Rw2
Voltage Uce2=4.8V of triode T2 collector and emitters；
A2, when non-loaded, measure the amplification factor with two-stage amplifying circuit experimental plate：
Ui=5mV, the sinusoidal signal of f=1kHZ, i.e. function hair is added in the input terminal of the experimental plate with function generator
The anode access test lead 1 of raw device, cathode access test lead 2 and are added ui=5mV, the sinusoidal signal of f=1kHZ, then by oscillograph
The anode probe access test lead 6 in the channels CH1, the cathode probe access test lead 7 in the channels CH1, adjusts oscillograph, oscillograph
The waveform of level-one amplification output, i.e. output waveform between test lead 6 and test lead 7 are shown on display panel, you can obtain one
The amplification factor of grade amplifying circuit；The anode probe access test lead 10 in the channels oscillograph CH2, the cathode probe in the channels CH2 connect
Enter test lead 11, adjust oscillograph, the waveform of two level amplification output, i.e. test lead 10 and survey are shown on the display panel of oscillograph
Try the output waveform between end 11, you can obtain the amplification factor of second amplifying circuit；Meanwhile the anode of ac millivoltmeter being visited
Head access test lead 10, cathode probe access test lead 11 measures output voltage Auo2, to which total amplification factor be calculated
Auo=Auo2/ui；
A3, when loaded measures the amplification factor with two-stage amplifying circuit experimental plate：
Test lead 10 is connect with test lead 12 with conducting wire, test lead 11 is connect with test lead 13, is existed with function generator
Ui=5mV is added in the input terminal of the experimental plate, and the anode of the sinusoidal signal of f=1kHZ, i.e. function generator accesses test lead 1,
Cathode accesses test lead 2 and ui=5mV, the sinusoidal signal of f=1kHZ is added, then the anode probe access in the channels oscillograph CH1 is surveyed
End 6 is tried, the cathode probe access test lead 7 in the channels CH1 adjusts oscillograph, shows that level-one is amplified on the display panel of oscillograph
Output waveform between the waveform of output, i.e. test lead 6 and test lead 7, you can obtain the amplification factor of level-one amplifying circuit；Show
The anode probe access test lead 10 in the channels wave device CH2, the cathode probe access test lead 11 in the channels CH2, adjusts oscillograph, shows
The waveform of two level amplification output, i.e. output waveform between test lead 10 and test lead 11 are shown on the display panel of wave device, i.e.,
The amplification factor of second amplifying circuit can be obtained；Meanwhile by the anode probe access test lead 10 of ac millivoltmeter, cathode is popped one's head in
Access test lead 11 measures output voltage Buo2, to which total amplification factor Buo=Buo2/ui be calculated.
When the utility model is used, following teaching can be done, verification two-stage amplifying circuit meets：Total amplification factor etc.
In the product of amplification factors at different levels.The circuit uses resistance coupling method, is ac amplifier circuit, so can only amplify exchange letter
Number.Using function signal generator generate sine wave signal, by oscillograph observe per level-one output waveform, then with incoming wave
Shape is compared, amplification factor is calculated, and finally verifies whether that total amplification factor is equal to the product of amplification factors at different levels, together
When, whether it is sine wave by observing waveform, to judge whether the quiescent point of triode is arranged correctly.General bringing onto load
When, amplification factor can be reduced.
Specific embodiment of the utility model is explained in detail above in conjunction with attached drawing, but the utility model and unlimited
In above-described embodiment, within the knowledge of a person skilled in the art, the utility model can also not departed from
Various changes can be made under the premise of objective.
Claims (2)
1. a kind of experimental plate with two-stage amplifying circuit, it is characterised in that：Including 14 test leads, electrolytic capacitor C1, C2, C3,
C4, resistance R1, R2, R3, R4, R5, R6, R7, R8, potentiometer Rw1, Rw2, triode T1, T2；
Test lead 1 is connect with the cathode of electrolytic capacitor C1, and the anode of electrolytic capacitor C1 is connect by resistance R2 with test lead 2, electricity
The anode of solution capacitance C1 is connect with the base stage of triode T1, and the base stage of triode T1 passes sequentially through resistance R1, potentiometer Rw1 and surveys
It tries end 14 to connect, the collector of triode T1 is connect with test lead 3, and test lead 3 is connect by resistance R3 with test lead 14, test
End 3 is connect with the anode of electrolytic capacitor C2, and the cathode of electrolytic capacitor C2 is connect with test lead 5, the emitter of triode T1 and survey
It tries end 4 to connect, test lead 4 is connect by resistance R4 with test lead 2；Test lead 14 passes sequentially through potentiometer Rw2, resistance R5 simultaneously
It is connect with the base stage of test lead 6, triode T2, the base stage of triode T2 is connect by resistance R6 with test lead 2, triode T2's
Collector is connect with test lead 8, and test lead 8 is connect by resistance R7 with test lead 14, the anode of test lead 8 and electrolytic capacitor C3
Connection, the cathode of electrolytic capacitor C3 are connect with test lead 10, and the emitter of triode T2 is connect with test lead 9, test lead 9 and survey
Try that end 2, in parallel simultaneously resistance R8, electrolytic capacitor C4, the anode of electrolytic capacitor C4 are connect with test lead 9 between test lead 11, survey
Examination end 12 is connect by resistance RL with test lead 13, and+12V power ends are connect with test lead 14, and ground terminal is connect with test lead 2,
Test lead 5 is connect with test lead 6.
2. the experimental plate according to claim 1 with two-stage amplifying circuit, it is characterised in that：Further include two 2 tests
End, Rf, form negative-feedback two-stage amplifying circuit；Test lead 15 is connect by resistance Rf with test lead 16；Test lead 9 and test
14 connection of end, test lead 15 are connect with test lead 4, and test lead 16 is connect with test lead 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721245696.XU CN207895748U (en) | 2017-09-27 | 2017-09-27 | A kind of experimental plate with two-stage amplifying circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721245696.XU CN207895748U (en) | 2017-09-27 | 2017-09-27 | A kind of experimental plate with two-stage amplifying circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207895748U true CN207895748U (en) | 2018-09-21 |
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| CN201721245696.XU Expired - Fee Related CN207895748U (en) | 2017-09-27 | 2017-09-27 | A kind of experimental plate with two-stage amplifying circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107633751A (en) * | 2017-09-27 | 2018-01-26 | 昆明理工大学 | A kind of brassboard with two-stage amplifying circuit and the method for measuring its multiplication factor |
-
2017
- 2017-09-27 CN CN201721245696.XU patent/CN207895748U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107633751A (en) * | 2017-09-27 | 2018-01-26 | 昆明理工大学 | A kind of brassboard with two-stage amplifying circuit and the method for measuring its multiplication factor |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180921 Termination date: 20190927 |