CN109345926A - A kind of portable simulation digital and electronic experimental facilities - Google Patents
A kind of portable simulation digital and electronic experimental facilities Download PDFInfo
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- CN109345926A CN109345926A CN201811249427.XA CN201811249427A CN109345926A CN 109345926 A CN109345926 A CN 109345926A CN 201811249427 A CN201811249427 A CN 201811249427A CN 109345926 A CN109345926 A CN 109345926A
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- 238000004088 simulation Methods 0.000 title claims abstract description 42
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- 238000010586 diagram Methods 0.000 claims description 49
- 239000003990 capacitor Substances 0.000 claims description 28
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- 238000001914 filtration Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000033228 biological regulation Effects 0.000 claims description 13
- 230000005669 field effect Effects 0.000 claims description 12
- 230000000087 stabilizing effect Effects 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
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- 238000002474 experimental method Methods 0.000 abstract description 25
- 238000005516 engineering process Methods 0.000 abstract description 10
- 238000012549 training Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/18—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism
- G09B23/183—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits
- G09B23/186—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits for digital electronics; for computers, e.g. microprocessors
Abstract
The invention belongs to electronic technology fields, are suitable for the experiment of light current Major, real training and technological development.More particularly to a kind of portable simulation digital and electronic experimental facilities.The present invention includes cabinet, case lid, circuit board, complete machine DC power supply, AC9V AC power source and positive and negative 12V become a full member negative 5V DC circuit board group at, the cabinet is flexibly connected case lid, the buckle being used in conjunction with each other is installed for being opened and closed on the cabinet and the case lid, one end mounting knob of the cabinet, the box house surface are adhesive with cabinet flannelette；The case lid interior surface, which is pasted, is covered with case lid flannelette, and storage pocket is also connected on the case lid flannelette for storing scattered accessory, the cabinet internal upper part and connects monolith circuit board；The present invention will simulate, the layout of experimental circuit subregion sub-module integrated with digital and electronic experiment module, easy to carry convenient to use.
Description
Technical field
The invention belongs to electronic technology fields, are suitable for the experiment of light current Major, real training and technological development.It is specifically related to
A kind of portable simulation digital and electronic experimental facilities.
Background technique
Digital simulation Experiment of Electronic Technology device common at present, experimental project are matched by single experiment pattern
, the more electronic circuits degisn case of general utility functions and digital electronic experimental box be it is separated, volume it is generally huger or
Function is simple.It is typically employed in the assembling mode that digital experiment area increases replaceable simulated experiment circuit board.Such as: model
The large-scale digital simulation Experiment of Electronic Technology device of KHM-3 type.
There are the problem of: (1) experiment module is monomer, and dispersion is not concentrated, and panel is spacious, the loose bad pipe of experimental circuit
It manages, and is easily lost, not easy-to-collection；(2) common digital simulation Experiment of Electronic Technology device volume is huge, not readily portable
It carries, (3) when explain Theory Course usually not in laboratory, but common digital simulation Experiment of Electronic Technology is filled
It sets and is placed in exclusive laboratory due to bulky, so digital simulation electronics skill cannot be used when explaining Theory Course
Art experimental provision, the understanding content of courses that student cannot be vivid；(4) cost of common digital simulation Experiment of Electronic Technology device
Costly, substantially at 5000 yuan or more；(5) current use increases replaceable simulated experiment circuit board in digital experiment area
The experimental project that assembling mode may be implemented is not comprehensive, can not fully meet the requirement of teaching.
There are no the product all experimental circuits of analog- and digital- electronics concentrated on one piece of panel at present.
Summary of the invention
In view of the problems of the existing technology, the purpose of the present invention is to provide a kind of experiments of portable simulation digital and electronic
Equipment.The present invention will simulate, the layout of experimental circuit subregion sub-module, convenient for take integrated with digital and electronic experiment module
Band is convenient to use.
In order to solve the above technical problems, the technical solution adopted by the present invention is.
A kind of portable simulation digital and electronic experimental facilities, including cabinet, case lid, circuit board, complete machine DC power supply, AC9V
AC power source and positive and negative 12V become a full member negative 5V DC circuit board group at the cabinet is flexibly connected case lid, the cabinet and the case
It covers the buckle for being equipped with and being used in conjunction with each other to be used to be opened and closed, one end mounting knob of the cabinet, the box house surface
It is adhesive with cabinet flannelette；The case lid interior surface, which is pasted, is covered with case lid flannelette, is also connected with storage on the case lid flannelette
Pocket connects monolith circuit board for storing scattered accessory, the cabinet internal upper part, and bottom middle position is fixed in the cabinet
Installation support plate is located at below the circuit board to the circuit board for supporting top, and described support plate the right and left fixes peace respectively
AC9V AC power source and complete machine DC power supply are filled, the box inside wall installs complete machine AC power source AC220V, institute between two parties up and down
It states complete machine AC power source AC220V while being electrically connected AC9V AC power source and complete machine DC power supply, the complete machine DC power supply electricity
Gas connects positive and negative 12V and becomes a full member negative 5V DC circuit plate.
The circuit board systems include Analogical Electronics module, Fundamental Digital Circuit module, measuring instrumentss module, direct current
Power module and AC power supply module；Using following distribution, the right of the circuit board is number electricity for the above module distribution
Sub-circuit region, the left side are Analogical Electronics region, and left area, that is, simulation electronic region first is horizontally-arranged to be divided into 5 moulds
Block is from left to right D.C. voltmeter module, DC milliammeter module, digital millivoltmeter, commonly uses electronic component modular and bridge-type
Rectification filtering module；Horizontally-arranged left area, that is, simulation electronic region second is 3 modules, is from left to right transistor npn npn of connecting
Pressure stabilizing source module, field-effect tube amplifier module and emitter follower module；Left area, that is, simulation electronic region third is horizontal
Row is divided into 4 modules, is from left to right silicon con trolled rectifier modular circuit, TOL power amplifier module, reversed feedback amplifier
Module and transistor common emitter single tube amplifier module；Left area, that is, simulation electronic region the 4th is horizontally-arranged to be divided into 4 modules,
It is from left to right RC sine-wave oscillator module, function signal generator module, integrated operational amplifier module and differential amplification
Device module；Left area, that is, simulation electronic region the 5th is horizontally-arranged to be divided into 4 modules, is from left to right the filter of diode halfwave rectifier
Wave Voltage stabilizing module, integrated regulated power supply module, integrated power amplifier module and pulse signal generator module.
Beneficial effects of the present invention:
(1) portable simulation digital and electronic experimental facilities of the present invention will simulate integrated with digital and electronic experiment module,
The layout of experimental circuit subregion sub-module, and increase and expand and develop part.Various pieces modularization is very eye-catching, is convenient for
Identification and operation, storage is convenient, and experiment module is not easy to lose.
(2) portable simulation digital and electronic experimental facilities of the present invention uses portable, facilitates teaching, can be in classroom or reality
Instruct room teaching demonstration.It can be used when explaining Theory Course using the present invention, student is capable of the understanding content of courses of image；
It is easy to carry simultaneously convenient to use, solve huge too fat to move, the spacious defect of original equipment.
(3) cost of portable simulation digital and electronic experimental facilities of the present invention is in 2000-3000 member or so, and common number
Costly, substantially at 5000 yuan or more, therefore present invention reduces costs, have for the cost of word Analog Electronics Technique Experiment device
Economic value.
(4) Digital Electronics Experiment of portable simulation digital and electronic experimental facilities of the present invention is no less than 20 kinds, simulation
Experiment of Electronic Technology is no less than 20 kinds, overcomes current use and increases replaceable simulated experiment circuit board in digital experiment area
The shortcomings that experimental project that assembling mode may be implemented is not comprehensive, can not fully meet teaching request.
Detailed description of the invention
Fig. 1 is overall structure of the present invention.
Fig. 2 is schematic diagram of internal structure of the present invention.
Fig. 3 is present system structural scheme of mechanism.
Fig. 4 is each module distribution figure of circuit board of the present invention.Since Fig. 4 content is very detailed, Chu is not seen visually, to
Lower view is described in detail.
Fig. 5 is each module distribution introduction figure of circuit board of the present invention.Fig. 5 is Fig. 4 corresponding diagram, and Fig. 5 serial number shows each mould
Arrangement situation between block.
Fig. 6 is common electronic component modular (3-1) circuit diagram of the invention.
Fig. 7 is bridge rectifier filter module (3-2) circuit diagram of the invention.
Fig. 8 is the transistor stabilized source module of tandem type (3-3) circuit diagram of the invention.
Fig. 9 is field-effect tube amplifier module (3-4) circuit diagram of the invention.
Figure 10 is emitter follower module (3-5) circuit diagram of the invention.
Figure 11 is silicon con trolled rectifier module (3-6) circuit diagram of the invention.
Figure 12 is TOL power amplifier module (3-7) circuit diagram of the invention.
Figure 13 is reversed feedback amplifier module (3-8) circuit diagram of the invention.
Figure 14 is transistor common emitter single tube amplifier module (3-9) circuit diagram of the invention.
Figure 15 is RC sine-wave oscillator module (3-10) circuit diagram of the invention.
Figure 16 is function signal generator module (3-11) circuit diagram of the invention.
Figure 17 is integrated operational amplifier module (3-12) circuit diagram of the invention.
Figure 18 is differential amplifier module (3-13) circuit diagram of the invention.
Figure 19 is diode halfwave rectifier filtering voltage regulation module (3-14) circuit diagram of the invention.
Figure 20 is integrated regulated power supply module (3-15) circuit diagram of the invention.
Figure 21 is integrated power amplifier module (3-16) circuit diagram of the invention.
Figure 22 is pulse signal generator module (3-17) circuit diagram of the invention.
Figure 23 be digital circuit blocks (3-18) circuit diagram of the invention (on).
Figure 24 be digital circuit blocks (3-18) circuit diagram of the invention (in).
Figure 25 be digital circuit blocks (3-18) circuit diagram of the invention (under).
Figure 26 is D.C. voltmeter module (3-19) circuit diagram of the invention.
Figure 27 is DC milliammeter module (3-20) circuit diagram of the invention.
Figure 28 is digital millivoltmeter (3-21) circuit diagram of the invention.
1 is cabinet in attached drawing, and 1-1 is handle, and 1-2 is duckbilled button, 1-3 cabinet flannelette, and 2 be case lid, 2-1 case lid flannelette,
2-2 is storage pocket, and 2-3 is duckbilled button, and 3 be circuit board, and 3-1 is common electronic component modular, and 3-2 is that bridge rectifier filters mould
Block, 3-3 are the transistor stabilized source module of tandem type, and 3-4 is field-effect tube amplifier module, and 3-5 is emitter follower module, 3-
6 be silicon con trolled rectifier module, and 3-7 is TOL power amplifier module, and 3-8 is reversed feedback amplifier module, and 3-9 is crystal
Pipe common emitter single tube amplifier module, 3-10 are RC sine-wave oscillator module, and 3-11 is function signal generator module, 3-12
For integrated operational amplifier module, 3-13 is differential amplifier module, and 3-14 is diode halfwave rectifier filtering voltage regulation module,
3-15 is integrated regulated power supply module, and 3-16 is integrated power amplifier module, and 3-17 is pulse signal generator module, 3-18
For digital circuit blocks, 3-19 is D.C. voltmeter module, and 3-20 is DC milliammeter module, and 3-21 is digital millivoltmeter, and 4 are
Aluminium skeleton, 5 be complete machine DC power supply, and 6 be AC9V AC power source, and 7 become a full member negative 5V DC circuit plate for positive and negative 12V, and 8 be support
Plate, 9 be complete machine AC power source AC220V.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described below with reference to embodiment, still
It should be appreciated that these descriptions are only further explanation the features and advantages of the present invention, rather than to the claims in the present invention
Limitation.
According to Fig. 1 and Fig. 2 it is found that overall structure of the invention includes cabinet 1, case lid 2, circuit board 3, complete machine DC power supply
Become a full member negative 5V DC circuit plate 7 of 5, AC9V AC power sources 6 and positive and negative 12V forms, 1 hinged case lid 2 of cabinet, the cabinet 1
Outer wall leading flank on bolt mounting knob 1-1, bolt installation is buckled there are two duckbilled mother buckle on the outer wall leading flank of the cabinet 1
1-2 is located at the two sides of the handle 1-1, and 1 interior surface of cabinet is adhesive with cabinet flannelette 1-3；Inside the case lid 2
Surface, which is pasted, is covered with case lid flannelette 2-1, and storage pocket 2-2 is also connected on the case lid flannelette 2-1 for storing scattered match
Part has been bolted 2 duckbilled buttons on the leading flank of the outer surface of the case lid 2 and has buckled 2-3, and 2 duckbilled buttons buckle 2-3
Cooperate to fasten with 2 duckbilleds mother buckle button 1-2 respectively and use, the inside circumference upper inside wall of the cabinet 1 is designed as dimpling
It is bolted monolith circuit board 3 for placing, bottom middle position fixed installation support plate 8 is located at the electricity in the cabinet 1
AC9V AC power source 6 and complete machine is fixedly mounted in circuit board 3 of plate 3 lower section in road to support top, the support plate 8 or so respectively
DC power supply 5, the box inside wall install complete machine AC power source AC220V9, the complete machine AC power source between two parties up and down
AC220V9 is electrically connected AC9V AC power source 6 and complete machine DC power supply 5 simultaneously, and the complete machine DC power supply 5 is electrically connected positive and negative
12V becomes a full member negative 5V DC circuit plate 7；The AC power source 6 exports AC9V and gives circuit board 3；The positive and negative 12V negative 5V that becomes a full member is straight
Current circuit plate 7 exports positive and negative 12V and positive and negative 5V gives circuit board 3；The cabinet 1 and 2 rib of case lid and edges and corners covering installation aluminium
Skeleton 4 is for being protected from abrasion.
As can be seen from FIG. 3, system of the invention is by Analogical Electronics module, Fundamental Digital Circuit module, measuring instrumentss
Module, DC power supplier and AC power supply module composition.Measuring instrumentss module is mainly that Analogical Electronics module provides survey
Amount service, DC power supplier provide power service simultaneously for Analogical Electronics module and digital electronic circuit module, exchange
Power module provides alternating current service for Analogical Electronics module.
According to Fig. 4 and Fig. 5 it is found that the overall distribution situation of circuit board of the present invention, Fig. 5 are the module distributions in corresponding diagram 4
It is illustrated using serial number 3-1 to 3-21, the right of circuit board of the invention is Fundamental Digital Circuit region 3-18, and the left side is
Analogical Electronics region, it is from left to right direct current that left area, that is, simulation electronic region first is horizontally-arranged, which to be divided into 5 modules,
Press table module 3-19, DC milliammeter module 3-20, digital millivoltmeter 3- 21, common electronic component modular 3-1 and bridge rectifier
Filter module 3-2；Horizontally-arranged left area, that is, simulation electronic region second is 3 modules, is from left to right transistor npn npn of connecting
Pressure stabilizing source module 3-3, field-effect tube amplifier module 3-4 and emitter follower module 3-5；Left area, that is, simulation electronic region
Third it is horizontally-arranged be divided into 4 modules, be from left to right silicon con trolled rectifier module 3-6 circuit diagram, TOL power amplifier module
3-7, reversed feedback amplifier module 3-8 and transistor common emitter single tube amplifier module 3-9；Left area, that is, simulation electronic region
The 4th it is horizontally-arranged be divided into 4 modules, be from left to right RC sine-wave oscillator module 3-10, function signal generator module 3-
11, integrated operational amplifier module 3-12 and differential amplifier module 3-13；Left area, that is, simulation electronic region the 5th is horizontal
Row be divided into 4 modules, be from left to right diode halfwave rectifier filtering voltage regulation module 3-14, integrated regulated power supply module 3-15,
Integrated power amplifier module 3-16 and pulse signal generator module 3-17.
Electronic component modular (3-1) circuit diagram is often used according to Fig. 6 it is found that common electronic component modular by Q1, Q2, Q3, Q4,
Thus LED1, LED2, C1, C2, C3, C4, D1, D2, R1, R2, R3, R4 composition form common electronic component group, provide inspection
Survey, measurement, identification and understanding common electronic component and for multimeter measure.
According to Fig. 7 bridge rectifier filter module (3-2) circuit diagram it is found that bridge rectifier filter module is by exchange 9V, rectification
Bridge D11~D14, filter capacitor C42, protective resistance R99 and load R127, R128 composition.Rectifier bridge D11~D14 output and guarantor
Shield resistance R99 series connection is connected with load R127, R128 again.It exchanges 9V and provides input voltage, filtered electrical for rectifier bridge D11~D14
Hold C42 to be filtered the pulsating direct current that rectifier bridge exports, to obtain DC voltage, protective resistance R99 is connected on output loop
In prevent short circuit, burn other elements, load R127, R128 can be completed entirely to detect load capacity etc., this circuit module
Wave rectification, capacitor filtering function, it may be appreciated that with load, unloaded, short circuit output voltage, calculate regulation factor and output resistance.
According to the transistor stabilized source module of Fig. 8 tandem type (3-3) circuit diagram it is found that by filter capacitor C43, regulating circuit,
Current foldback circuit, reference circuit, sample circuit, power filtering capacitor C44 and load circuit composition, realize series connection transistor npn npn
Voltage stabilizing function.The input of filter capacitor C43 anode connects power supply negative terminal ground connection, filters out the ripple of input voltage, regulating circuit W14 with
R104 series connection provides voltage for Q18, Q19, and regulating circuit W14, R104, Q18, Q19 change the base current of adjustment pipe to control
Adjust the control ability of pipe, mono- section of the current sampling resistor R100 emitter another termination output for meeting adjustment pipe Q18, R101 with
R106 series connection partial pressure prevents output short-circuit from causing output electric current is excessive to burn other components to the base stage of Q20, reference circuit by
R102 and ZW1 are provided in series a normal voltage, and sample circuit R103 connects with W15, R107, by the sliding end of potentiometer W15
The base stage for meeting Q21 samples output voltage to control the voltage that adjustment pipe base current achievees the purpose that control output, electricity
Source filter capacitor C44 just terminates output negativing ending grounding and is filtered again to obtain more stably DC voltage, and load circuit is by W16
It is composed in series with R105 to detect load capacity etc..
According to Fig. 9 field-effect tube amplifier module (3-4) circuit diagram it is found that by input capacitance, biasing resistor, output electricity
Hold, shunt capacitance, load composition realizes field-effect tube amplifier circuit function.Input capacitance C17 mono- terminates the signal source other end
Connect fet gate, biasing resistor W5 partial pressure of connecting with R41 connects that R39 is connected to Q9 grid, R37, R42 are coupled with the source of Q9
Pole and drain electrode, shunt capacitance C18 mono- terminate the drain electrode other end ground connection of Q9, and field-effect tube Q9 enlarging function, load is by output electricity
Hold C16 and R40 to be composed in series,.
According to Figure 10 emitter follower module (3-5) circuit diagram it is found that by input circuit, bias loop, output loop, Q6
Amplifier circuit composition, completes emitter follower function.Input circuit is composed in series input circuit through R20 and C8 by signal source,
There is provided input signal for the base stage of amplifier Q6, W2 connects with R19, R21 connect Q6 emitter composition biasing circuit, power supply be put
Big device provides quiescent voltage to guarantee that amplifier operation is composed in series output loop and carries to detect band in amplification region, C9 and R22
Ability etc., Q6 amplifier circuit amplify input signal.
According to Figure 11 silicon con trolled rectifier module (3-6) circuit diagram it is found that by AC power source AC9V, full-wave rectification is returned
Road, loop of voltage regulation, trigger circuit, output loop composition complete transistor controlled rectification function.AC power source AC9V and all-wave are whole
It flows back to road D6, D7, D9, D10 and is provided in series alternating voltage, loop of voltage regulation completes pressure stabilization function by R95 series connection D8, is rear stage electricity
Road provides DC supply, and trigger circuit W12 connects with R97 and C41 charges for C41 and be connected to the end E of T1, R96, R98 points
The end b1 and b2 for not being connected to T1 forms a sharp pulse generative circuit, and the end G that b2 termination T2 gives is silicon-controlled to trigger, and exports back
Routing R94 connects with DS16 to be connected with the end A of T2, to detect load capacity etc..
According to Figure 12 TOL power amplifier module (3-7) circuit diagram it is found that by input circuit, biasing circuit, bootstrapping electricity
Road, pushes circuit, push-pull circuit, and output loop composition completes the function of power amplification.Input circuit is by the low frequency signal that inputs
The base stage for pushing triode is given by C32, boostrap circuit is composed in series by R83, W12, R86, C30, utilizes the electricity of capacitor C30
Pressure continues to power, and promotion circuit, which is connected to divide with R87 by R86, provides bias voltage for the base stage of Q17, and R88 and C33 are simultaneously
The small signal of input is amplified the amplifier to push rear class by connection ground, and output loop is connected by D5 with W11 to eliminate and hand over
More distortion, R84 mono- terminate the base stage of another termination Q15 of R83 to provide bias voltage, the collector phase of the emitter and Q16 of Q15
Even group, which manages to be connected with C31 anode simultaneously in pairs, constitutes output loop, and output connects 8 ohm of loudspeaker to detect load capacity
Deng.
According to Figure 13 reversed feedback amplifier module (3-8) circuit diagram it is found that by input circuit, pre-amplifier, rear class is put
Big device, negative-feedback circuit, output circuit composition complete negative-feedback enlarging function.Input circuit connected by R27 with C12 and with it is preceding
Grade amplifier Q7 composition, gives the signal of signal source to pre-amplifier, pre-amplifier by W4, R25, R26, R23, C10,
The basic single tube amplifier of R32, R34, C13 composition, pre-amplifier are given rear class by C10 and are put after carrying out level-one amplification to signal
Big device, post-amplifier form basic common emitter single tube amplifier by W3, R26, R30, R24, Q8, R35, C14, prime are believed
Number amplified again, negative-feedback circuit is composed in series by R36 and C15, the output signal of rear class is anti-in the form of negative-feedback
The emitter of prime method device Q7 is fed to inhibit the size of output signal, improves signal quality, output circuit is by C11 and R33
It is composed in series, to detect load capacity etc..
According to Figure 14 transistor common emitter single tube amplifier module (3-9) circuit diagram it is found that by input circuit, biased electrical
Road, amplifier, output circuit composition complete transistor common emitter single tube amplifier function.Input electricity is composed in series by R14 and C6
The signal of signal source is given the base stage of triode Q5 by road by the anode of capacitor C6, by the upper inclined of W1 and R13 Q5 in series
Resistance is set, R15 ground connection constitutes the below-center offset resistance of Q5, and the collector of Q5 is connected to power supply by R12, and the emitter of Q5 passes through R16
Ground connection, C7 are shunt capacitance, meet C6 by the collector of Q5 and R17 forms output circuit, to detect load capacity etc..
According to Figure 15 RC sine-wave oscillator module (3-10) circuit diagram it is found that by frequency-selective network, positive-feedback circuit is born
Feed circuit, basic amplifier circuit, output circuit composition complete RC Sasser and shake function.By R55 and C19 or after connecting,
Frequency-selective network in series again after R62 is in parallel with C20, C24, C26 by C22 and employs series network selectively and constitutes positive-feedback circuit, will
Output signal is fed back the base stage to previous stage amplifier Q13 by C23, and W7 and R56 are composed in series negative-feedback circuit, by output signal
Feed back the emitter of pre-amplifier Q13, to control the output amplitude of amplifier, by C23, R57, R63, R58, R64, R59,
R65, R66, C21, C25, Q13, Q14 composition two-stage basic amplifier circuit amplify sine wave signal, the collection of triode Q14
Electrode connects C22 composition output circuit, to detect load capacity etc..
According to Figure 16 function signal generator module (3-11) circuit diagram it is found that by integrated circuit MAX038 chip, waveform
Selection circuit, frequency selective network, frequency tuning circuit, waveform output circuit composition.It is raw to complete sine wave, triangular wave, square wave
At function signal generator function.The 3 foot A0 and 4 foot A1 of chip MAX038 connect on K33 waveform selection switch, composition waveform choosing
Circuit to be selected, exports sine wave as A1=1, works as A0=0, when A1=1, exports triangular wave, works as A0=1, and when A1=0 exports square wave,
5 feet of MAX038 connect C57 or C58, C59, C60, C62, C63, C64 component frequency selection circuit, and 1 foot of MAX038 passes through W19
It connects with R123 and is connected to 10 feet, component frequency trimming circuit is finely adjusted output frequency, and the 19 feet output of MAX038 connects
R124, R125 form waveform circuit, to detect load capacity etc..
According to Figure 17 integrated operational amplifier module (3-12) circuit diagram it is found that by direct current signal source circuit, operation amplifier
Device chip ua741, integrating circuit, differential circuit, inverse proportion computing circuit, signed magnitude arithmetic(al) circuit composition.To complete to integrate
The calculation function of operational amplifier.It is connected by the mono- termination+12V power supply other end of R71 with W10, R76, another termination-of R76
12V, the position for changing the sliding end of W10 can export generating positive and negative voltage and no-voltage, by the mono- termination+12V power supply other end of R72 with
W19, R77 series connection, another termination -12V of R77, the position for changing the sliding end of W9 can export generating positive and negative voltage and no-voltage, group
At DC signal source, 2 feet of another termination ua741 chip of input signal are terminated by R75 mono-, C28 feeds back output voltage to 2
Foot constitutes integrating circuit, and 2 feet of another termination ua741 chip of input signal are terminated by R75 mono-, and C29 arrives output voltage feedback
2 feet constitute differential circuit, and another 2 feet for terminating to ua741 chip of output of DC signal source are coupled with by R67, R69,
2 feet of termination of R68, R70, two 16 feet of termination form signed magnitude arithmetic(al) circuit.
According to Figure 18 differential amplifier module (3-13) circuit diagram it is found that by input circuit, output circuit, typical case is differential to be put
Big device, constant-current source type differential amplifier composition, completes differential enlarging function.By the base stage of a termination Q11 of R46, another termination
Input signal Ui1 and R48, the other end ground connection of R48, the base stage of a termination Q10 of R50, another termination R51 and input signal
The other end of Ui2, R51 are grounded, and form input circuit.A termination power+12V of R43 and R44, the other end meet Q11, Q10 respectively
Collector and the output Uo1 and Uo2 of differential amplifier form output circuit, the sliding end of W6 connects R52 composition typical difference through K8
Dynamic amplifier circuit, the collector that the sliding end of W6 meets Q12 through K8 form constant current mode source differential amplifier.
According to Figure 19 diode halfwave rectifier filtering voltage regulation module (3-14) circuit diagram it is found that by AC power source, half-wave is whole
Current circuit, filter circuit, voltage regulator circuit composition complete halfwave rectifier filtering voltage regulation function.AC power source AC connects end and connects half respectively
The anode and ground composition half-wave rectifying circuit, the cathode of mono- terminating diode D22 of filter capacitor C65 of wave rectifier diode D22 is another
One end ground connection forms filter circuit, the cathode of another termination DZ1 of cathode of a termination D22 of R9, the plus earth composition of DZ1
Voltage regulator circuit provides direct current output.
0 integrated regulated power supply module (3-15) circuit diagram is it is found that by voltage stabilizing chip 78LM05 according to fig. 2, filter circuit group
At completion integrated regulated power supply work energy.A termination input Ui of filter capacitor C45, C47, i.e. 1 foot of voltage stabilizing chip, the other end
It is grounded (GND), a termination input Uo of filter capacitor C48, C46, i.e. 3 feet of voltage stabilizing chip, the other end are grounded (GND), composition
Filter circuit.It is filtered to circuit is output and input.
1 integrated power amplifier module (3-16) circuit diagram is it is found that by input circuit, integrated amplifier chip is filtered according to fig. 2
Wave circuit, output circuit composition.Complete the function of integrated power amplification.6,7 feet of integrated amplifier chip TDA2822M connect respectively
R92, R89 and UiL, UiR form input circuit, and the anode of filter capacitor C39, C38 meet integrated amplifier chip TDA2822M respectively
5,8 feet, cathode ground connection, the anode of filter capacitor C34, C37 is coupled with 1,3 feet of integrated amplifier chip TDA2822M, bears
Pole connects UoL, UoR output end respectively, and filter capacitor C36, C40 connect with R91, R92 respectively, the other end ground connection of R91, R92,
High-frequency signal is filtered out, output circuit is formed.
According to fig. 22 pulse signal generator module (3-17) circuit diagrams it is found that by when base chip NE555,1KHz frequency select
Select circuit, 1Hz frequency selective network, frequency output circuitry composition.1KHz frequency selective network completes the pulse of 1KHz and 1Hz
Function occurs for frequency.R109, a termination power+5V, the anode of 7 feet of base chip NE555 and R108 and D15 are another when another termination
One termination C50 is to ground composition, 1KHz frequency selective network, R109, a termination power+5V, base chip NE555 when another termination
Another termination K, C51 of the anode of 7 feet and R108 and D15 makes output signal to ground composition 2Hz frequency selective network composition
2Hz。
Overall digital circuit module (3-18) circuit diagram that 3, Figure 24 and Figure 25 are combined into according to fig. 2 is it is found that by power supply unit
Point, display circuit, integrated package expansion, logic level display moding circuit, single pulse circuit, logic comment input circuit group
At.Top is power unit, under mode display circuit, then under be integrated package expansion, expansion or so is spare expansion
Open up the end COM, below integrated package expansion be that logic level shows moding circuit, then under be single pulse circuit, bottom is to patrol
Collect comment input circuit.At Digital Electronics Experiment real training function.Power unit is by+12V, -12V ,+5V, -5V, AC9V group
Direct current and alternating voltage needed for being provided as positive plate.
6 D.C. voltmeter module (3-19) circuit diagrams are it is found that its function is measurement direct current power source voltage and each according to fig. 2
Quiescent point voltage.
7 DC milliammeter module (3-20) circuit diagrams are it is found that its function is the electricity for measuring each quiescent point according to fig. 2
Stream.
8 digital millivoltmeters (3-21) circuit diagram is it is found that its function is to measure outputting and inputting for AC amplifier according to fig. 2
Voltage.
The large-scale digital simulation Experiment of Electronic Technology device of existing model KHM-3 type, the type that can be tested have 5
Kind, negative feedback amplifier circuit, RC oscillator, power amplifier, emitter follower, differential amplifier；Experiment type of the invention
20 kinds are no less than for Analog Electronics Technique Experiment, commonly uses electronic component identification and detection, bridge rectifier, bridge rectifier filtering, bridge
The pressure stabilizing of formula rectifying and wave-filtering, the transistor stabilized source of tandem type, field-effect tube amplifier, emitter follower, silicon con trolled rectifier electricity
Road, TOL power amplifier circuit, reversed feedback amplifier circuit, transistor common emitter single tube amplifier circuit, RC sine-wave oscillation
Device circuit, function signal generator circuit, integrated operational amplifier circuit can do the experiment of 5 functions, differential amplifier electricity
Road, diode halfwave rectifier filter circuit, diode halfwave rectifier filter regulator circuit, integrates diode half-wave rectifying circuit
Voltage-stabilized power supply circuit, integrated power amplifier circuit, pulse signal generator circuit.
Digital Electronics Experiment of the invention is no less than 20 kinds, including with or non-, TTL integrated logic gate parameter survey
Examination, the parameter testing of CMOS integrated logic gate, the connection of integrated logic circuit and driving, adder, decoder and its application, group
Design and test, data selector, trigger, shift register and its application, counter, the integrated timing of combinational logic circuit
Device, pulsqe distributor and its application, monostable flipflop and Schmidt trigger, pulse delay and waveform shaping circuit use
Gate circuit generates pulse signal --- astatic multivibrator, digital frequency meter, D/A, A/D converter, comprehensive experiment ---
Device, electronic stopclock, comprehensive experiment are raced to be the first to answer a question in intelligence test --- 3 half DC digital voltmeters 74.In the specific behaviour of experiment
Have on work and facilitate operation, module is clear, compact volume and convenience, it is easy to carry the advantages that.
It is understood that being merely to illustrate the present invention above with respect to specific descriptions of the invention and being not limited to this
Technical solution described in inventive embodiments, those skilled in the art should understand that, still the present invention can be carried out
Modification or equivalent replacement, to reach identical technical effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of portable simulation digital and electronic experimental facilities, it is characterised in that: including cabinet, case lid, circuit board, complete machine direct current
Power supply, AC9V AC power source and positive and negative 12V become a full member negative 5V DC circuit board group at the cabinet is flexibly connected case lid, the case
The buckle being used in conjunction with each other is installed to be used to be opened and closed on body and the case lid, one end mounting knob of the cabinet, the case
Body interior surface is adhesive with cabinet flannelette；The case lid interior surface, which is pasted, is covered with case lid flannelette, on the case lid flannelette also
Storage pocket is connected with for storing scattered accessory, the cabinet internal upper part connects monolith circuit board, in the cabinet in bottom
Between position support plate be fixedly mounted be located at below the circuit board to the circuit board for supporting top, described support plate the right and left
AC9V AC power source and complete machine DC power supply are fixedly mounted respectively, the box inside wall installs complete machine AC power source between two parties up and down
AC220V, the complete machine AC power source AC220V are electrically connected AC9V AC power source and complete machine DC power supply, the complete machine simultaneously
DC power supply is electrically connected positive and negative 12V and becomes a full member negative 5V DC circuit plate, and the AC power source output AC9V gives circuit board；It is described
Become a full member negative 5V DC circuit plate of positive and negative 12V exports positive and negative 12V and positive and negative 5V and gives circuit board.
2. a kind of portable simulation digital and electronic experimental facilities according to claim 1, it is characterised in that: the circuit board
System includes Analogical Electronics module, Fundamental Digital Circuit module, measuring instrumentss module, DC power supplier and AC power source
Module；The above module distribution is using following distribution, and the right of the circuit board is Fundamental Digital Circuit region, and the left side is mould
Quasi- electronic circuit region, it is from left to right DC voltage that left area, that is, simulation electronic region first is horizontally-arranged, which to be divided into 5 modules,
Table module, DC milliammeter module, digital millivoltmeter, common electronic component modular and bridge rectifier filter module；Left area
I.e. simulation electronic region second it is horizontally-arranged be 3 modules, from left to right put for the transistor stabilized source module of tandem type, field-effect tube
Big device module and emitter follower module；Left area, that is, simulation electronic region third is horizontally-arranged to be divided into 4 modules, from left to right
For silicon con trolled rectifier modular circuit, TOL power amplifier module, reversed feedback amplifier module and transistor common emitter single tube
Amplifier module；Left area, that is, simulation electronic region the 4th is horizontally-arranged to be divided into 4 modules, is from left to right RC sine-wave oscillation
Device module, function signal generator module, integrated operational amplifier module and differential amplifier module；Left area simulates electricity
The 5th of subregion is horizontally-arranged to be divided into 4 modules, is from left to right diode halfwave rectifier filtering voltage regulation module, integrated regulated power supply
Module, integrated power amplifier module and pulse signal generator module.
3. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: the bridge-type is whole
Stream filter module is made of exchange 9V, rectifier bridge D11~D14, filter capacitor C42, protective resistance R99 and load R127, R128,
Rectifier bridge D11~D14 output connects with protective resistance R99 and connects again with load R127, R128.Exchange 9V be rectifier bridge D11~
D14 provides input voltage, and the pulsating direct current that rectifier bridge exports is filtered by filter capacitor C42, to obtain DC voltage, protection
Resistance R99, which is connected in output loop, prevents short circuit, burns other elements, loads R127, R128 to detect load capacity；
The transistor stabilized source module of tandem type is adopted by filter capacitor C43, regulating circuit, current foldback circuit, reference circuit
Sample circuit, power filtering capacitor C44 and load circuit composition, realize the transistor stabilized function of tandem type, filter capacitor C43 anode
Input connects power supply negative terminal ground connection, filters out the ripple of input voltage, and regulating circuit W14 connects with R104 provides voltage for Q18, Q19,
Regulating circuit W14, R104, Q18, Q19 change the base current of adjustment pipe to control the control ability of adjustment pipe, current sample electricity
Mono- section of R100 of resistance connects another termination output of emitter of adjustment pipe Q18, and R101 and R106 series connection partial pressure are prevented to the base stage of Q20
Output short-circuit causes output electric current is excessive to burn other components, and reference circuit is provided in series a standard electric by R102 and ZW1
Pressure, sample circuit R103 connect with W15, R107, are adopted by the base stage of the sliding termination Q21 of potentiometer W15 to output voltage
Sample achievees the purpose that the voltage for controlling output, power filtering capacitor C44 are just terminating output negative terminal to control adjustment pipe base current
Ground connection is filtered again to obtain more stably DC voltage, and load circuit is composed in series by W16 and R105 and carries energy to detect band
Power etc..
4. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: the field-effect
Pipe amplifier module realizes field-effect tube amplifier by input capacitance, biasing resistor, output capacitance, shunt capacitance, load composition
Circuit function, input capacitance C17 mono- terminate another termination fet gate of signal source, and biasing resistor W5 connects partial pressure with R41
Connect that R39 is connected to Q9 grid, R37, R42 are coupled with the source electrode and drain electrode of Q9, shunt capacitance C18 mono- terminates the drain electrode other end of Q9
Ground connection, field-effect tube Q9 enlarging function, load are composed in series by output capacitance C16 and R40；
The emitter follower module completes emitter-base bandgap grading by input circuit, bias loop, output loop, Q6 amplifier circuit composition
Follower function, input circuit are composed in series input circuit through R20 and C8 by signal source, and the base stage for amplifier Q6 provides input
Signal, W2 connects with R19, R21 connects the emitter composition biasing circuit of Q6, and power supply provides quiescent voltage for amplifier to guarantee to put
Big device work is composed in series output loop to detect load capacity etc. in amplification region, C9 and R22, and Q6 amplifier circuit is to input
Signal amplifies；
The silicon con trolled rectifier module is by AC power source AC9V, full-wave rectification circuit, loop of voltage regulation, trigger circuit, output
Circuit composition, completes transistor controlled rectification function, and AC power source AC9V connects with full-wave rectification circuit D6, D7, D9, D10 and mentions
For alternating voltage, loop of voltage regulation completes pressure stabilization function by R95 series connection D8, provides DC supply for rear stage circuit, triggers
Circuit W12 connect with R97 and C41 charge and is connected to the end E of T1 for C41, R96, R98 are coupled with the end b1 and b2 of T1 and form one
A sharp pulse generative circuit, the end G that b2 termination T2 gives, silicon-controlled to trigger, output loop is connected by R94 with DS16 and the A of T2
End is connected, to detect load capacity etc..
5. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: the TOL function
Rate amplifier module pushes circuit, push-pull circuit by input circuit, biasing circuit, boostrap circuit, and output loop composition is completed
The function of power amplification, input circuit are given the base stage for pushing triode by the low frequency signal that inputs by C32, boostrap circuit by
R83, W12, R86, C30 are composed in series, and continue to power using the voltage of capacitor C30, and circuit is pushed to be connected by R86 with R87
It divides and provides bias voltage, R88 and C33 earth for the base stage of Q17, the small signal of input is amplified to push rear class
Amplifier, output loop connected by D5 with W11 with eliminate intermodulation distortion, R84 mono- terminate R83 it is another termination Q15 base stage with
Bias voltage is provided, the emitter of Q15 is connected to form the composition that is connected simultaneously with C31 anode to pipe with the collector of Q16 and exports back
Road, output connect 8 ohm of loudspeaker to detect load capacity etc.；
The reversed feedback amplifier module is by input circuit, pre-amplifier, post-amplifier, negative-feedback circuit, output circuit
Composition completes negative-feedback enlarging function, and input circuit is connected by R27 with C12 and formed with pre-amplifier Q7, by signal source
Signal gives pre-amplifier, and pre-amplifier is put by the basic single tube that W4, R25, R26, R23, C10, R32, R34, C13 are formed
Big device, pre-amplifier carry out signal to give post-amplifier by C10 after level-one amplification, post-amplifier by W3, R26,
R30, R24, Q8, R35, C14 form basic common emitter single tube amplifier, prime signal are amplified again, by R36 and C15
Be composed in series negative-feedback circuit, the output signal of rear class is fed back in the form of negative-feedback the emitter to prime method device Q7 with
Inhibit the size of output signal, improves signal quality, output circuit is composed in series by C11 and R33, to detect load capacity；
The transistor common emitter single tube amplifier module is by input circuit, and biasing circuit, amplifier, output circuit forms, complete
At transistor common emitter single tube amplifier function, input circuit is composed in series by R14 and C6, by the signal of signal source by capacitor C6
Anode give the base stage of triode Q5, by the upper biasing resistor of W1 and R13 Q5 in series, R15 ground connection constitute Q5 it is lower partially
Resistance is set, the collector of Q5 is connected to power supply by R12, and the emitter of Q5 is shunt capacitance by R16 ground connection, C7, by the collection of Q5
Electrode meets C6 and R17 and forms output circuit, to detect load capacity etc..
6. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: the RC is sinusoidal
Wave oscillator module completes RC by frequency-selective network, positive-feedback circuit, negative-feedback circuit, basic amplifier circuit, output circuit composition
Sasser shakes function, by R55 and C19 or after connecting, frequency-selective network in series again after R62 is in parallel with C20, C24, C26, by
C22 constitutes positive-feedback circuit with series network is employed selectively, and output signal is fed back the base stage to previous stage amplifier Q13, W7 by C23
It is composed in series negative-feedback circuit with R56, by the emitter of output signal feedback to pre-amplifier Q13, to control amplifier
Output amplitude forms two-stage by C23, R57, R63, R58, R64, R59, R65, R66, C21, C25, Q13, Q14 and amplifies electricity substantially
Road amplifies sine wave signal, and the collector of triode Q14 connects C22 composition output circuit, to detect load capacity etc.；
The function signal generator module is by integrated circuit MAX038 chip, waveform selection circuit, frequency selective network, frequency
Trimming circuit, waveform output circuit composition.Complete the function signal generator function that sine wave, triangular wave, square wave generate, chip
The 3 foot A0 and 4 foot A1 of MAX038 connect on K33 waveform selection switch, form waveform selection circuit, export sine wave as A1=1,
Work as A0=0, when A1=1, exports triangular wave, works as A0=1, and when A1=0 exports square wave, 5 feet of MAX038 connect C57 or C58, C59,
C60, C62, C63, C64 component frequency selection circuit, 1 foot of MAX038, which is connected by W19 with R123, is connected to 10 feet, component frequency
Trimming circuit is finely adjusted output frequency, and the 19 feet output of MAX038 connects R124, R125 composition waveform circuit, to detect
Load capacity.
7. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: the integrated fortune
Amplifier module is calculated by direct current signal source circuit, operational amplifier chip ua741, integrating circuit, differential circuit, inverse proportion operation
Circuit, signed magnitude arithmetic(al) circuit composition, to complete the calculation function of integrated operational amplifier, by mono- termination+12V power supply of R71
The other end is connected with W10, R76, another termination -12V of R76, change the sliding end of W10 position can export generating positive and negative voltage and
No-voltage is connected by the mono- termination+12V power supply other end of R72 with W19, R77, and another termination -12V of R77 changes the sliding of W9
The position at end can export generating positive and negative voltage and no-voltage, form DC signal source, terminate another termination of input signal by R75 mono-
2 feet of ua741 chip, C28, which feeds back output voltage to 2 feet, constitutes integrating circuit, terminates another termination of input signal by R75 mono-
2 feet of ua741 chip, C29, which feeds back output voltage to 2 feet, constitutes differential circuit, is coupled with DC signal source by R67, R69
Another 2 feet for terminating to ua741 chip of output, 2 feet of termination of R68, R70, two 1 termination 6 feet composition signed magnitude arithmetic(al)s electricity
Road.
8. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: differential amplifier
Module completes differential amplification function by input circuit, output circuit, typical differential amplifier, constant-current source type differential amplifier composition
Can, by the base stage of a termination Q11 of R46, another termination input signal Ui1 and R48, the other end ground connection of R48, one end of R50
The base stage of Q10 is connect, the other end ground connection of another termination R51 and input signal Ui2, R51 form input circuit；R43's and R44
One termination power+12V, the other end connect output Uo1 and Uo2 the composition output of the collector and differential amplifier of Q11, Q10 respectively
Circuit, the sliding end of W6 meet R52 through K8 and form typical differential amplifier circuit, and the sliding end of W6 connects the collector group of Q12 through K8
At constant current mode source differential amplifier；
The diode halfwave rectifier filtering voltage regulation module is by AC power source, half-wave rectifying circuit, filter circuit, voltage regulator circuit group
At completion halfwave rectifier filtering voltage regulation function, AC power source AC connects the anode and ground group that end meets halfwave rectifier diode D22 respectively
At half-wave rectifying circuit, the cathode other end of mono- terminating diode D22 of filter capacitor C65 is grounded, composition filter circuit, and the one of R9
The cathode of another termination DZ1 of cathode of D22 is terminated, the plus earth of DZ1 forms voltage regulator circuit, provides direct current output.
9. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: described integrated steady
Piezoelectricity source module (3-15) circuit diagram is it is found that by voltage stabilizing chip 78LM05, filter circuit composition completes integrated regulated power supply work
Can, a termination input Ui of filter capacitor C45, C47, i.e. 1 foot of voltage stabilizing chip, the other end are grounded (GND), filter capacitor C48,
A termination input Uo of C46, i.e. 3 feet of voltage stabilizing chip, the other end are grounded (GND), form filter circuit.To outputting and inputting electricity
Road is filtered；
The integrated power amplifier module is by input circuit, integrated amplifier chip, filter circuit, output circuit composition.It completes
The function of integrated power amplification.6,7 feet of integrated amplifier chip TDA2822M meet R92, R89 and UiL, UiR composition input respectively
Circuit, the anode of filter capacitor C39, C38 connect 5,8 feet of integrated amplifier chip TDA2822M, cathode ground connection, filter capacitor respectively
The anode of C34, C37 are coupled with 1,3 feet of integrated amplifier chip TDA2822M, and cathode connects UoL, UoR output end respectively, filtering
Capacitor C36, C40 connect with R91, R92 respectively, and the other end ground connection of R91, R92 filter out high-frequency signal, forms output circuit；
The pulse signal generator module by when base chip NE555,1KHz frequency selective network, 1Hz frequency selective network, frequency
Function, R109, a termination electricity occur for rate output circuit composition, 1KHz frequency selective network, the pulse frequency for completing 1KHz and 1Hz
Source+5V, when another termination another termination C50 of the anode of 7 feet of base chip NE555 and R108 and D15 to composition, 1KHz frequency
Selection circuit, R109, a termination power+5V, the positive other end of 7 feet of base chip NE555 and R108 and D15 when another termination
Connect K, C51 to form 2Hz frequency selective network composition, make output signal 2Hz.
10. a kind of portable simulation digital and electronic experimental facilities according to claim 2, it is characterised in that: the entirety
Digital circuit blocks show moding circuit, single pulse electricity by power unit, display circuit, integrated package expansion, logic level
Road, logic comment on input circuit composition, top is power unit, under mode display circuit, then under be integrated package expansion,
Expansion or so is the end spare extension COM, below integrated package expansion is that logic level shows moding circuit, then under be single
Impulse circuit, bottom are logic comment input circuits；Power unit forms the plate that is positive by+12V, -12V ,+5V, -5V, AC9V
Direct current and alternating voltage needed for providing.
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| CN110136547A (en) * | 2019-05-23 | 2019-08-16 | 电子科技大学 | A kind of signal sampling demonstration instrument for teaching based on time domain waveform |
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| CN111934621A (en) * | 2020-09-25 | 2020-11-13 | 成都信息工程大学 | Oscillator suitable for small load condition |
| CN112382178A (en) * | 2020-12-09 | 2021-02-19 | 河北工业大学 | Portable experiment circuit board |
| CN114999289A (en) * | 2022-06-21 | 2022-09-02 | 山东师范大学 | Modular electric experimental box with detachable expansion module |
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| CN111934621A (en) * | 2020-09-25 | 2020-11-13 | 成都信息工程大学 | Oscillator suitable for small load condition |
| CN111934621B (en) * | 2020-09-25 | 2020-12-22 | 成都信息工程大学 | Oscillator suitable for small load condition |
| CN112382178A (en) * | 2020-12-09 | 2021-02-19 | 河北工业大学 | Portable experiment circuit board |
| CN114999289A (en) * | 2022-06-21 | 2022-09-02 | 山东师范大学 | Modular electric experimental box with detachable expansion module |
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