CN108918936A - A kind of novel portable oscillograph - Google Patents
A kind of novel portable oscillograph Download PDFInfo
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- CN108918936A CN108918936A CN201810695800.8A CN201810695800A CN108918936A CN 108918936 A CN108918936 A CN 108918936A CN 201810695800 A CN201810695800 A CN 201810695800A CN 108918936 A CN108918936 A CN 108918936A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/02—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form
- G01R13/0209—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form in numerical form
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/02—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form
- G01R13/0218—Circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/02—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form
- G01R13/0218—Circuits therefor
- G01R13/0272—Circuits therefor for sampling
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Abstract
The invention discloses a kind of novel portable oscillographs, including power module, signal conditioning circuit module, main control module, parameter input module and display module；Power module is each module for power supply, signal conditioning circuit module is shown for receiving measured signal and being adjusted to conditioned signal and be sent to display module according to the parameter that parameter input module is sent by main control module with wavy manner, signal conditioning circuit module includes impedance inverter circuit, programme-controlled gain amplifying circuit and sample range adjustment circuit, measured signal is decayed and is sent to programme-controlled gain amplifying circuit by impedance inverter circuit, programme-controlled gain amplifying circuit receives main control module control and sends signal progress voltage gain adjusting to impedance inverter circuit and be sent to sample range adjustment circuit, sample range adjustment circuit promotes reference voltage formation conditioned signal and complies with main control module sampled voltage range and be sent to main control module.The advantages that oscillograph has accuracy high, and stability is high, low in energy consumption and easy to carry.
Description
Technical field
The present invention relates to a kind of oscillographs, more particularly to a kind of novel portable oscillograph.
Background technique
The electric signal that oscillograph can will be unable to directly observe is converted into image, so that convenient study electrical phenomena.?
Using very extensive in the ambits such as mathematics, physics and technology fields of measurement.With integrated circuit and number in recent years
The fast development of the relevant technologies such as signal processing, digital oscilloscope gradually have been favored by people, in contrast, analog oscilloscope
Need to push forward comprehensively oscilloscope tube, vertical amplification and horizontal sweep to increase bandwidth, and digital oscilloscope can be by improving front end
The performance of A/D conversion module can be achieved with.Digital oscilloscope set multi abilities, make its volume relative analog oscillograph
For it is smaller, performance is more powerful, has the ability that is handled in real time signal.
The development of embedded technology equally also brings many benefits, imitates so that obtaining maximum work with least resource
The reasonable disposition of benefit, resource can make system more perfect.Embedded technology is combined with oscillograph so that oscillograph is grasped
Make more flexible and convenient.And the existing most volume of oscillograph is larger, function is more single, and volume is larger, is not suitable for any
Place uses, and cheaper small and exquisite, the more convenient digital oscilloscope used is increasingly pursued by market, and user prefers to
Complexity problem is solved by feature-rich portable testing tool.
Summary of the invention
In view of the above-mentioned defects in the prior art, the present invention provides a kind of novel portable oscillograph, there is oscillograph
The advantages that accuracy is high, and real-time is good, and man-machine interface is friendly, and stability is high, low in energy consumption and easy to carry.
Technical solution of the present invention is as follows：A kind of novel portable oscillograph, including power module, signal conditioning circuit mould
Block, main control module, parameter input module and display module；The power module is signal conditioning circuit module, main control module, ginseng
Number input module and display module power supply；The parameter input module receives user and inputs and parameter is sent to main control module；
The main control module sends the parameter that conditioned signal and the parameter input module are sent for receiving signal reason circuit module,
And conditioned signal is sent to display module and is shown with wavy manner；The signal conditioning circuit module is for receiving measured signal
And it is adjusted to conditioned signal, the signal conditioning circuit module includes impedance inverter circuit, programme-controlled gain amplifying circuit and sampling
Range adjustment circuit, measured signal is decayed and is sent to programme-controlled gain amplifying circuit by the impedance inverter circuit, described program-controlled
Gain amplifying circuit receives main control module control and sends signal progress voltage gain adjusting to the impedance inverter circuit and send
To sample range adjustment circuit, the sample range adjustment circuit promotes reference voltage formation conditioned signal and complies with master control mould
Block sampled voltage range is simultaneously sent to main control module.
Further, the impedance inverter circuit include the first amplifier, first amplifier "+" input pin connection to
Signal is surveyed, for the "+" input pin of first amplifier by the tenth resistance eutral grounding, the "-" input pin of first amplifier is logical
The output pin that first resistor connects the first amplifier is crossed, the "+" power pins of first amplifier pass through the first exchange filtering electricity
Road is connect with power supply high level, and the "-" power pins of first amplifier pass through the second exchange filtering circuit and power supply low level
Connection, the first exchange filtering circuit and the second exchange filtering circuit are composed in parallel by several capacitors.
Further, the programme-controlled gain amplifying circuit includes gain-programmed amplifier, the gain-programmed amplifier
Input terminal connects the output end of impedance inverter circuit, and the input terminal of the gain-programmed amplifier passes through the 8th resistance eutral grounding, institute
The "+" power pins for stating gain-programmed amplifier exchange filtering circuit by third and connect with power supply high level, the program-controlled increasing
The "-" power pins of beneficial amplifier are connect by the 4th exchange filtering circuit with power supply low level, the third exchange filtering electricity
Road exchanges filtering circuit with the 4th and is composed in parallel by several capacitors, the control voltage pin of the gain-programmed amplifier and master
The control voltage output end connection of module is controlled, the output end of the gain-programmed amplifier connects described program-controlled by 3rd resistor
The feedback end of the feedback end of gain amplifier, the gain-programmed amplifier passes through the 7th capacity earth.
Further, the sample range adjustment circuit includes the second amplifier, and the "+" input pin of second amplifier connects
The output end of programme-controlled gain amplifying circuit is connect, the "+" input pin of second amplifier is grounded by the first filter circuit, described
The "-" input pin of second amplifier connects reference low level by the 4th resistance, and the "-" input pin of second amplifier passes through
The "+" power pins of 4th resistance and the 8th capacity earth, second amplifier are connect with power supply high level, second amplifier
"-" power pins connect with power supply low level, the output end of second amplifier passes through the second filter circuit connection the respectively
The "-" input pin of two amplifiers, is grounded by third filter circuit, first filter circuit, the second filter circuit and third
Filter circuit is made of capacitor and resistor coupled in parallel.
Further, the control voltage output end of the main control module connects the "+" of third amplifier by the 16th resistance
Input pin, the "+" power pins of the third amplifier are connect by the 5th exchange filtering circuit with power supply high level, and described the
The "-" power pins of three amplifiers are connect by the 6th exchange filtering circuit with power supply low level, the 5th exchange filtering circuit
It exchanges filtering circuit with the 6th to be composed in parallel by several capacitors, the output end of the third amplifier is connected by twelfth resistor
The output end of the "-" input pin of third amplifier, the third amplifier connects gain-programmed amplifier by the 14th resistance
Control voltage pin.
Further, the power module includes first switch voltage-stablizer and second switch voltage-stablizer, the first switch
Voltage-stablizer and second switch voltage-stablizer are MC34063A, and " 1 " pin of the first switch voltage-stablizer passes through concatenated 5th electricity
Sense connects " 8 " pin of first switch voltage-stablizer with the 18th resistance, and " 7 " pin of the first switch voltage-stablizer passes through the tenth
Eight resistance connect " 8 " pin of first switch voltage-stablizer, and " 7 " pin of the first switch voltage-stablizer is connected by the 19th resistance
High level is connect, " 6 " pin of the first switch voltage-stablizer passes through the 19th capacity earth, the first switch voltage-stablizer
" 6 " pin connects high level, and by the 21st resistance eutral grounding, described first opens " 5 " pin of the first switch voltage-stablizer
" 5 " pin for closing voltage-stablizer passes through concatenated 20th resistance and the 21st capacity earth, the first switch voltage-stablizer
" 1 " pin by concatenated third voltage-stabiliser tube and the 21st capacity earth, " 2 " pin of the first switch voltage-stablizer and
" 4 " pin ground connection, for " 2 " pin and " 3 " pin of the first switch voltage-stablizer by the 18th capacity earth, the third is steady
The connecting pin of pressure pipe and the 21st capacitor constitutes boosted-high level end by the 6th inductance, boosted-high level end connection the
The input terminal of one integrated regulator, the boosted-high level end pass through the 7th exchange filtering circuit ground connection, first pressure stabilizing
The output end of integrated circuit constitutes power supply high level and by the 8th exchange filtering circuit ground connection；The second switch voltage-stablizer
" 1 " pin, " 7 " pin connect with " 8 " pin and pass through the 22nd resistance connection high level, the second switch voltage-stablizer
" 6 " pin connects high level by the 26th capacity earth, " 6 " pin of the second switch voltage-stablizer, and described second opens
" 5 " pin of voltage-stablizer is closed by the 24th resistance eutral grounding, " 2 " pin of the second switch voltage-stablizer passes through concatenated the
Four voltage-stabiliser tubes and the 27th capacity earth, " 2 " pin of the second switch voltage-stablizer are grounded by the 7th inductance, and described the
" 3 " pin of two switching regulators is connect by the 25th capacitor with the connecting pin of the 4th voltage-stabiliser tube and the 27th capacitor,
" 4 " pin of the second switch voltage-stablizer is connect with the connecting pin of the 4th voltage-stabiliser tube and the 27th capacitor, and described second opens
" 5 " pin for closing voltage-stablizer is connect by the 23rd resistance with the connecting pin of the 4th voltage-stabiliser tube and the 27th capacitor, described
The connecting pin of 4th voltage-stabiliser tube and the 27th capacitor constitutes decompression low level end, the decompression low level end by the 8th inductance
Connecting the input terminal of the second integrated regulator, the decompression low level end is by the 9th exchange filtering circuit ground connection, and described the
The output end of two integrated regulators constitutes power supply low level and by the tenth exchange filtering circuit ground connection, and the described 7th exchanged
Circuit, the 8th exchange filtering circuit, the 9th exchange filtering circuit and the tenth exchange filtering circuit are filtered by several capacitor parallel connection groups
At.
Further, the main control module includes DAC module, and the DAC module is used to constitute the control electricity of main control module
Press output end or for generating square wave, triangular wave and sine wave.
Preferably, the parameter input module is touching display screen.
The advantages of technical solution provided by the present invention, is：The signal that signal conditioning circuit module can will be sent
The range of suitable AD sampling is improved into, and is shown after being sampled by main control module, stable work electricity is provided by power module
Source can obtain accuracy height, and real-time is good, and the high waveform of stability is shown.The oscillograph has accuracy height, real-time
The advantages that good, man-machine interface is friendly, and stability is high, low in energy consumption and easy to carry, has good application value.
Detailed description of the invention
Fig. 1 is novel portable oscilloscope module structural schematic diagram of the present invention.
Fig. 2 is the electrical schematic diagram schematic diagram of ± 5V power circuit of power module.
Fig. 3 is the electrical schematic diagram schematic diagram of the 3.3V power circuit of power module.
Fig. 4 is the electrical schematic diagram of signal conditioning circuit module.
Specific embodiment
Below with reference to embodiment, the invention will be further described, it should be understood that these embodiments be merely to illustrate the present invention and
It is not used in and limits the scope of the invention, after the present invention has been read, those skilled in the art are to various equal similar shapes of the invention
The modification of formula is fallen in the application range as defined in the appended claims.
Incorporated by reference to shown in Fig. 1 to Fig. 4, novel portable oscillograph involved in the present embodiment includes power module 1, signal
Conditioning circuit module 2, main control module 3, parameter input module 4 and display module 5, power module 1 are signal conditioning circuit module
2, main control module 3, parameter input module 4 and display module 5 are powered.Signal conditioning circuit module 2 includes impedance inverter circuit, journey
Gain amplifying circuit and sample range adjustment circuit are controlled, measured signal first passes through impedance Input transformation circuit and carries out impedance transformation,
Programme-controlled gain amplifying circuit is entered back into later to be adjusted, and finally improves measured signal at the ADC carried for main control chip
It is sampled.Parameter input module 4 receives user and inputs and parameter is sent to main control module 3；Main control module 3 uses
STM32F407ZGT6, ADC are the analog-digital converters of successive approximation type, have up to 19 channels, including 16 external channels and
3 inner passages can be configured to 6,8,10,12 sampling resolutions, also have the function of simulating house dog, ADC
Conversion can be triggered by timer internal, while the data after converting can be the same as excessively internal DMA channel transmission.When sampling point
When resolution is configured to 8, sampling rate can work up to 3.27M, this microcontroller due to carrying 3 ADC module
Under triplex mode, therefore single pass sample rate can be improved 3 times, up to nearly 10M.3 receiving signal of main control module reason electricity
Road module sends the parameter that 2 conditioned signals and parameter input module 4 are sent, and conditioned signal is sent to display module 5 with wave
Shape mode is shown.
The specific structure of power module 1 is as shown in Figures 2 and 3, including ± 5V power circuit and 3.3V power circuit.+5V
Power circuit includes first switch voltage-stablizer U6, U6 MC34063A." 1 " pin of first switch voltage-stablizer U6 passes through concatenated
" 8 " pin of 5th inductance L5 and the 18th resistance R18 connection first switch voltage-stablizer U6." 7 " of first switch voltage-stablizer U6
Pin passes through " 8 " pin of the 18th resistance R18 connection first switch voltage-stablizer U6." 7 " pin of first switch voltage-stablizer U6
Pass through the 19th resistance R19 connection high level Vin_5V." 6 " pin of first switch voltage-stablizer U6 passes through the 19th capacitor C19
" 6 " pin of ground connection, first switch voltage-stablizer U6 connects high level Vin_5V." 5 " pin of first switch voltage-stablizer U6 passes through
" 5 " pin of 21st resistance R21 ground connection, first switch voltage-stablizer U6 passes through concatenated 20th resistance R20 and the 20th
One capacitor C21 ground connection." 1 " pin of first switch voltage-stablizer U6 passes through concatenated third voltage-stabiliser tube D3 and the 21st capacitor
C21 ground connection." 2 " pin and " 4 " pin of first switch voltage-stablizer U6 is grounded, " 2 " pin of first switch voltage-stablizer U6 and " 3 "
Pin is grounded by the 18th capacitor C18.The connecting pin of third voltage-stabiliser tube D3 and the 21st capacitor C21 pass through the 6th inductance L6
Composition boosted-high level end VCC_6.5V, the input terminal of boosted-high level end VCC_6.5V the first integrated regulator of connection U7,
Boosted-high level end VCC_6.5V constitutes electricity by the 7th exchange filtering circuit ground connection, the output end of the first integrated regulator U7
Source high level VCC_5V simultaneously passes through the 8th exchange filtering circuit ground connection.In the part U6 and resistance R18, R19, R20, R21 with
And capacitor C18, C19, C21 and voltage-stabiliser tube D3, inductance L5, L6 constitute booster circuit, obtain the electricity of a stable+6.5V
Pressure, later using U7, i.e. LM78L05, to carry out stable 5V voltage output, capacitor C20, C22, C23, C24 are for removing
Alternating component in circuit.
- 5V power circuit includes that second switch voltage-stablizer U8, U8 are also MC34063A." 1 " of second switch voltage-stablizer U8
Pin, " 7 " pin connect with " 8 " pin and pass through the 22nd resistance R22 connection high level Vin_5V.Second switch voltage-stablizer
" 6 " pin of U8 is grounded by the 26th capacitor C26." 6 " pin of second switch voltage-stablizer U8 connects high level Vin_5V,
" 5 " pin of second switch voltage-stablizer U8 is grounded by the 24th resistance R24." 2 " pin of second switch voltage-stablizer U8 is logical
Cross concatenated 4th voltage-stabiliser tube D4 and the 27th capacitor C27 ground connection." 2 " pin of second switch voltage-stablizer U8 passes through the 7th electricity
Feel L7 ground connection." 3 " pin of second switch voltage-stablizer U8 passes through the 25th capacitor C25 and the 4th voltage-stabiliser tube D4 and the 27th
The connecting pin of capacitor C27 connects." 4 " pin and the 4th voltage-stabiliser tube D4 and the 27th capacitor C27 of second switch voltage-stablizer U8
Connecting pin connection." 5 " pin of second switch voltage-stablizer U8 passes through the 23rd resistance R23 and the 4th voltage-stabiliser tube D4 and second
The connecting pin of 17 capacitor C27 connects.The connecting pin of 4th voltage-stabiliser tube D4 and the 27th capacitor C27 passes through the 8th inductance L8 structure
At decompression low level end VCC_-6.5V, it is depressured the input terminal of the second integrated regulator of low level end VCC_-6.5V connection U9,
Low level end VCC_-6.5V is depressured by the 9th exchange filtering circuit ground connection, the output end of the second integrated regulator U9 is constituted
Power supply low level VCC_-5V simultaneously passes through the tenth exchange filtering circuit ground connection.U8 and R22, R23, R24 and capacitor in the part
C25, C26, C27 and inductance L7, L8 and voltage-stabiliser tube D4 constitute back-pressure circuit, obtain the voltage of a stable -6.5V, then
Obtain stable -5V by U9 chip LM79L05 pressure stabilizing, capacitor C28, C29, C30, C31 be used to remove the exchange in circuit at
Point.+ 5V power circuit exchanges filtering circuit, the 8th exchange filtering circuit, the 9th exchange filtering with the 7th in -5V power circuit
Circuit and the tenth exchange filtering circuit are composed in parallel by several capacitors.This two parts can provide stable ± 5V, on the one hand
It can power for signal conditioning circuit module 2, or main control module 3 is powered.
3.3V power circuit is then by power supply high level VCC_5V by the 8th voltage-stabiliser tube D8, by voltage stabilizing chip
Its peripheral circuit of U10AMS1117-3.3V obtains stable 3.3V voltage, capacitor C11, C12, C13, C14 mainly will exchange at
Divide removal.
Incorporated by reference to shown in Fig. 4, signal conditioning circuit module includes impedance inverter circuit, programme-controlled gain amplifying circuit and sampling
Range adjustment circuit.
Measured signal is decayed and is sent to programme-controlled gain amplifying circuit by impedance inverter circuit, and impedance inverter circuit includes the
One amplifier U1A, U1A uses the AD8066 of AD company production, and the typical input bias current of the chip is 2pA, gain bandwidth product
Up to 145MHz, typical offset voltage is 0.4mV, meets the needs of of the invention.First amplifier U1A "+" input pin connection to
Signal is surveyed, the "+" input pin of the first amplifier U1A is grounded by the tenth resistance R10, is not influenced in order to as far as possible measured
Signal, the input impedance of oscillograph need relatively high, the tenth resistance R10 selection 1M Ω.The "-" input pin of first amplifier U1A
By the output pin of first resistor R1 the first amplifier of connection U1A, the "+" power pins of the first amplifier U1A pass through the first exchange
Filtering circuit is connect with power supply high level VCC_5V, the "-" power pins of the first amplifier U1A by the second exchange filtering circuit with
The VCC_-5V connection of power supply low level, the first exchange filtering circuit and the second exchange filtering circuit are composed in parallel by several capacitors.
First amplifier U1A and surrounding component can be by signal decaying 1/4.
Due to the signal amplitude very little Jing Guo impedance inverter circuit, the error of signal can be very big, programme-controlled gain amplifying circuit
Main control module control is received to send signal progress voltage gain adjusting to impedance inverter circuit and be sent to sample range adjustment electricity
Road.Programme-controlled gain amplifying circuit includes gain-programmed amplifier U2.The input terminal connection impedance transformation of gain-programmed amplifier U2
The input terminal of the output end of circuit, gain-programmed amplifier U2 is grounded by the 8th resistance R8.The "+" of gain-programmed amplifier U2
Power pins exchange filtering circuit by third and connect with power supply high level VCC_5V, the "-" power supply of gain-programmed amplifier U2
Pin is connect by the 4th exchange filtering circuit with power supply low level VCC_-5V.Third exchange filtering circuit and the 4th exchanged
Filter circuit is composed in parallel by several capacitors.The 0.5V reference voltage of " 2 " number pin of gain-programmed amplifier U2 is from warp
The 0.5V divided again after LM431 pressure stabilizing.The output end of gain-programmed amplifier U2 passes through the program-controlled increasing of 3rd resistor R3 connection
The feedback end of the feedback end of beneficial amplifier U2, gain-programmed amplifier U2 is grounded by the 7th capacitor C7.
The voltage that the control voltage output end Vgain of main control module 3, i.e. DAC module export 0 to 1V passes through the 16th resistance
The "+" power pins of the "+" input pin of R16 connection third amplifier U3A, third amplifier U3A pass through the 5th exchange filtering circuit
It is connect with power supply high level VCC_5V.The "-" power pins of third amplifier U3A pass through the 6th exchange filtering circuit electricity low with power supply
Flat VCC_-5V connection.5th exchange filtering circuit and the 6th exchange filtering circuit are composed in parallel by several capacitors.Third amplifier
The output end of U3A passes through the "-" input pin of twelfth resistor R12 connection third amplifier U3A, the output end of third amplifier U3A
Pass through the control voltage pin V_control of the 14th resistance R24 connection gain-programmed amplifier U2.
Sample range adjustment circuit promotes reference voltage formation conditioned signal and complies with 3 sampled voltage range of main control module
And be sent to main control module 3, i.e., reference voltage is raised to 1.25V, so that obtaining sampled voltage range in 0~2.5V.Sampling
Range adjustment circuit includes the defeated of the "+" input pin connection programme-controlled gain amplifying circuit of the second amplifier U1B, the second amplifier U1B
Outlet.The "+" input pin of second amplifier U1B is grounded by the first filter circuit, and the "-" input pin of the second amplifier U1B is logical
Cross the 4th resistance R4 connection reference low level Vref_-1.25V.The "-" input pin of second amplifier U1B passes through the 4th resistance R4
It is grounded with the 8th capacitor C8.The "+" power pins of second amplifier U1B are connect with power supply high level VCC_5V, the second amplifier U1B's
"-" power pins are connect with power supply low level VCC_-5V.The output end of second amplifier U1B passes through the second filter circuit company respectively
The "-" input pin for meeting the second amplifier U1B, is grounded by third filter circuit, the first filter circuit, the second filter circuit and
Three filter circuits are made of capacitor and resistor coupled in parallel.Reference low level Vref_-1.25V is that power supply high level VCC_5V passes through
The 1.25V that precision voltage regulator LM431ACM3 is divided is obtained using the amplified voltage of U3B reverse phase.
Signal generator function of the present invention uses the DAC module carried by main control module 3, currently if it is oscillography
Under device mode, DAC module controls gain and DAC module is then switched to signal currently if it is under signal generator mode
The output of device.Exportable 0~20KHz the frequency of signal generator, the square wave of 0.1V~2.5V amplitude, triangular wave and sine wave.It is main
Control module 3 is exported according to the DAC that the configuration of signal generator parameter calculates 100 points in a wave period, then by this
The data of 100 points update to DAC the output that waveform can be realized by DMA cycle.
Claims (8)
1. a kind of novel portable oscillograph, including power module, signal conditioning circuit module, main control module, parameter input mould
Block and display module, it is characterised in that：The power module is signal conditioning circuit module, main control module, parameter input module
It powers with display module；The parameter input module receives user and inputs and parameter is sent to main control module；The master control mould
Block sends the parameter that conditioned signal and the parameter input module are sent for receiving signal reason circuit module, and conditioning is believed
Number be sent to display module is shown with wavy manner；The signal conditioning circuit module is for receiving measured signal and being adjusted to
Signal is managed, the signal conditioning circuit module includes impedance inverter circuit, programme-controlled gain amplifying circuit and sample range adjustment electricity
Measured signal is decayed and is sent to programme-controlled gain amplifying circuit, the programme-controlled gain amplification electricity by road, the impedance inverter circuit
Road receives main control module control and sends signal progress voltage gain adjusting to the impedance inverter circuit and be sent to sample range
Adjustment circuit, the sample range adjustment circuit promote reference voltage formation conditioned signal and comply with main control module sampled voltage
Range is simultaneously sent to main control module.
2. novel portable oscillograph according to claim 1, which is characterized in that the impedance inverter circuit includes first
Amplifier, the "+" input pin of first amplifier connect measured signal, and the "+" input pin of first amplifier passes through the tenth
Resistance eutral grounding, the "-" input pin of first amplifier connect the output pin of the first amplifier by first resistor, and described first
The "+" power pins of amplifier are connect by the first exchange filtering circuit with power supply high level, and the "-" power supply of first amplifier draws
Foot is connect by the second exchange filtering circuit with power supply low level, the first exchange filtering circuit and the second exchange filtering circuit
It is composed in parallel by several capacitors.
3. novel portable oscillograph according to claim 1, which is characterized in that the programme-controlled gain amplifying circuit includes
Gain-programmed amplifier, the output end of the input terminal connection impedance inverter circuit of the gain-programmed amplifier, the program-controlled increasing
The input terminal of beneficial amplifier is exchanged by the 8th resistance eutral grounding, the "+" power pins of the gain-programmed amplifier by third
Filtering circuit is connect with power supply high level, and the "-" power pins of the gain-programmed amplifier pass through the 4th exchange filtering circuit
It being connect with power supply low level, the third exchange filtering circuit and the 4th exchange filtering circuit are composed in parallel by several capacitors,
The control voltage pin of the gain-programmed amplifier and the control voltage output end of main control module connect, and the programme-controlled gain is put
The output end of big device connects the feedback end of the gain-programmed amplifier by 3rd resistor, the gain-programmed amplifier it is anti-
It presents end and passes through the 7th capacity earth.
4. novel portable oscillograph according to claim 1, which is characterized in that the sample range adjustment circuit includes
Second amplifier, the output end of the "+" input pin connection programme-controlled gain amplifying circuit of second amplifier, second amplifier
"+" input pin is grounded by the first filter circuit, and the "-" input pin of second amplifier passes through the connection reference of the 4th resistance
The "-" input pin of low level, second amplifier passes through the 4th resistance and the 8th capacity earth, the "+" of second amplifier
Power pins are connect with power supply high level, and the "-" power pins of second amplifier are connect with power supply low level, second fortune
The output end put passes through the "-" input pin that the second filter circuit connects the second amplifier respectively, is grounded by third filter circuit,
First filter circuit, the second filter circuit and third filter circuit are made of capacitor and resistor coupled in parallel.
5. novel portable oscillograph according to claim 3, which is characterized in that the control voltage of the main control module is defeated
Outlet connects the "+" input pin of third amplifier by the 16th resistance, and the "+" power pins of the third amplifier pass through the 5th
Exchange filtering circuit connect with power supply high level, the "-" power pins of the third amplifier by the 6th exchange filtering circuit and
The connection of power supply low level, the 5th exchange filtering circuit and the 6th exchange filtering circuit are composed in parallel by several capacitors, institute
The output end for stating third amplifier connects the "-" input pin of third amplifier, the output of the third amplifier by twelfth resistor
End connects the control voltage pin of gain-programmed amplifier by the 14th resistance.
6. novel portable oscillograph according to claim 1, which is characterized in that the power module includes first switch
Voltage-stablizer and second switch voltage-stablizer, the first switch voltage-stablizer and second switch voltage-stablizer be MC34063A, described first
" 1 " pin of switching regulator connects " 8 " pin of first switch voltage-stablizer by concatenated 5th inductance and the 18th resistance,
" 7 " pin of the first switch voltage-stablizer by the 18th resistance connect first switch voltage-stablizer " 8 " pin, described first
" 7 " pin of switching regulator connects high level by the 19th resistance, and " 6 " pin of the first switch voltage-stablizer passes through the
" 6 " pin of 19 capacity earths, the first switch voltage-stablizer connects high level, and " 5 " of the first switch voltage-stablizer are drawn
Foot passes through concatenated 20th resistance and second by the 21st resistance eutral grounding, " 5 " pin of the first switch voltage-stablizer
" 1 " pin of 11 capacity earths, the first switch voltage-stablizer is connect by concatenated third voltage-stabiliser tube and the 21st capacitor
Ground, " 2 " pin and " 4 " pin of the first switch voltage-stablizer are grounded, " 2 " pin of the first switch voltage-stablizer and " 3 "
By the 18th capacity earth, the connecting pin of the third voltage-stabiliser tube and the 21st capacitor is made up of the 6th inductance to rise pin
High level end is pressed, the boosted-high level end connects the input terminal of the first integrated regulator, and the boosted-high level end passes through
7th exchange filtering circuit ground connection, the output end of first integrated regulator constitute power supply high level and by the 8th exchanges
Filtering circuit ground connection；" 1 " pin, " 7 " pin of the second switch voltage-stablizer connect with " 8 " pin and pass through the 22nd electricity
Resistance connection high level, " 6 " pin of the second switch voltage-stablizer pass through the 26th capacity earth, the second switch pressure stabilizing
" 6 " pin of device connects high level, and " 5 " pin of the second switch voltage-stablizer is by the 24th resistance eutral grounding, and described the
" 2 " pin of two switching regulators passes through concatenated 4th voltage-stabiliser tube and the 27th capacity earth, the second switch pressure stabilizing
" 2 " pin of device is grounded by the 7th inductance, and " 3 " pin of the second switch voltage-stablizer passes through the 25th capacitor and the 4th
The connection of the connecting pin of voltage-stabiliser tube and the 27th capacitor, " 4 " pin of the second switch voltage-stablizer and the 4th voltage-stabiliser tube and the
The connecting pin of 27 capacitors connects, and " 5 " pin of the second switch voltage-stablizer passes through the 23rd resistance and the 4th pressure stabilizing
Pipe is connected with the connecting pin of the 27th capacitor, and the connecting pin of the 4th voltage-stabiliser tube and the 27th capacitor passes through the 8th inductance
Decompression low level end is constituted, the decompression low level end connects the input terminal of the second integrated regulator, the decompression low level
By the 9th exchange filtering circuit ground connection, the output end of second integrated regulator constitutes power supply low level and by the at end
Ten exchange filtering circuits ground connection, the 7th exchange filtering circuit, the 8th exchange filtering circuit, the 9th exchange filtering circuit and the
Ten exchange filtering circuits are composed in parallel by several capacitors.
7. novel portable oscillograph according to claim 3, which is characterized in that the main control module includes DAC module,
The DAC module is for constituting the control voltage output end of main control module or for generating square wave, triangular wave and sine wave.
8. novel portable oscillograph according to claim 1, which is characterized in that the parameter input module is aobvious for touch-control
Display screen.
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| CN201810695800.8A CN108918936A (en) | 2018-06-29 | 2018-06-29 | A kind of novel portable oscillograph |
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| CN201810695800.8A CN108918936A (en) | 2018-06-29 | 2018-06-29 | A kind of novel portable oscillograph |
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| CN110609161A (en) * | 2019-09-26 | 2019-12-24 | 江苏理工学院 | STM 32-based solar portable oscilloscope |
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| CN111459078A (en) * | 2020-04-24 | 2020-07-28 | 西安科技大学 | Control circuit of simple circuit tester for teaching experiment and testing method thereof |
| CN113671244A (en) * | 2021-08-06 | 2021-11-19 | 优利德科技(中国)股份有限公司 | Amplification module, detection sampling device and signal sampling amplification method |
| CN117214675A (en) * | 2023-11-08 | 2023-12-12 | 无锡力芯微电子股份有限公司 | Test method and test circuit for magnetic stripe card information reading integrated circuit |
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Application publication date: 20181130 |