CN201066366Y - An oscillograph with dual attenuator - Google Patents
An oscillograph with dual attenuator Download PDFInfo
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- CN201066366Y CN201066366Y CNU2007201543142U CN200720154314U CN201066366Y CN 201066366 Y CN201066366 Y CN 201066366Y CN U2007201543142 U CNU2007201543142 U CN U2007201543142U CN 200720154314 U CN200720154314 U CN 200720154314U CN 201066366 Y CN201066366 Y CN 201066366Y
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- module
- attenuation
- amplification
- oscillograph
- attenuation module
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Abstract
The utility model discloses an oscilloscope with two attenuators, which consists of an attenuation module (A), an amplification following module, an attenuation module (B), an amplification module, an A/D conversion module, a control processing module, an input module, a storage module and a display module. The output of the attenuation module (A) is connected with the input of the amplification following module, the output of the amplification following module is connected with the input of the attenuation module (B), the output of the attenuation module (B) is connected with the input of the amplification module, the output of the amplification module is connected with the input of the A/D conversion module, and the output of the A/D conversion module is connected with the input of the control processing module. By changing the connection order of the attenuation modules and the amplification following module, the effects of simplifying the circuit and lowering noise can be achieved.
Description
Technical field
The utility model relates to a kind of digital oscilloscope field, particularly oscillographic signal attenuation, amplification sector.
Background technology
Oscillograph is in acquired signal, need carry out the decay and the amplification of certain multiple according to the size of signal amplitude at its analog input end, so that signal reaches the range of signal that a suitable A/D converter is gathered, and on oscillographic screen, demonstrate a waveform that is fit to observation.
Such as, being input to oscillographic signal amplitude is 6V, and the signal input range of A/D converter is 0-3V, then oscillograph needs earlier this signal amplitude decay to be arrived 0.6V for ten times, send into A/D converter acquired signal waveform then, the signal of A/D converter acquired signal amplitude in its identifiable scope like this, and become digital signal transfers to give processor controls these conversion of signals, carry out the calculating and the demonstration of waveform.
In actual applications, often once decay is not enough, reach the damping capacity of certain multiplying power, generally adopts two-stage attenuation module and amplification module.
As shown in Figure 1, the oscillograph of prior art comprises: module, amplification module, A/D modular converter, control treatment module, load module, memory module, display module are followed in attenuation module A, attenuation module B, amplification.
Measured signal is input to attenuation module A from signal input part, and control treatment module can be controlled the control end of the relay of attenuation module A according to signal amplitude, and 1 times of decay or 10 times of decay are selected in control.Signal enters attenuation module B after attenuation module A comes out, attenuation module B also can select 1 times of decay or 10 times of decay to the control of relay control end according to control treatment module.Afterwards, signal enters to amplify and follows module, the driving force of enhancing signal.Follow after module comes out from amplification, signal enters amplification module, amplifies.Afterwards, the A/D modular converter is sampled to the signal after amplifying, and converts sampled value to digital signal and be sent to calculating and the demonstration that control treatment module is carried out waveform.
Some following shortcomings of method existence that prior art adopts continuous two-stage decay and then amplifies input signal:
1) the continuous complexity that compares comparatively speaking of the attenuator circuit structure in the two-stage attenuator circuit, the cost height takies circuit board space.
2) in the prior art because the decay of continuous two-stage, the decay multiplying power is bigger, introduces noise easily, so signal to noise ratio (S/N ratio) is lower, this sampling for subsequent conditioning circuit has brought unfavorable factor.
The utility model content
The purpose of this utility model is to provide another kind to have the oscillograph of two attenuators, simplifies circuit to reach, reduces cost, and reduces the effect of noise.
As shown in Figure 2, a kind of oscillograph with two attenuators described in the utility model comprises attenuation module A, amplifies and follow module, attenuation module B, amplification module, A/D modular converter, control treatment module, load module, memory module, display module; The output terminal of described amplification module links to each other with the input end of described A/D modular converter, the output terminal of described A/D modular converter links to each other with described control treatment module, described control treatment module is connected with described attenuation module A, described attenuation module B respectively, the output terminal of described attenuation module A links to each other with the input end that module is followed in described amplification, and the output terminal that module is followed in described amplification links to each other with the input end of described attenuation module B; Input signal carries out attenuation of the first kind through described attenuation module A, follow module with the enhancing signal driving force through described amplification, carry out the attenuation of the second kind through described attenuation module B, amplify once more by described amplification module, by described A/D modular converter, be converted into digital signal and output to described control treatment module at last.
Measured signal is input to attenuation module A from signal input part, and control treatment module is selected unattenuated or decay according to signal amplitude control attenuation module A.Signal is followed module 2, the driving force of enhancing signal from entering after attenuation module A comes out to amplify.Enter attenuation module B afterwards, control treatment module is selected unattenuated or decay according to signal amplitude control attenuation module B.Afterwards, signal enters amplification module, and the enlargement factor of control treatment module control amplification module is amplified signal.
Though to the eye, just simply attenuation module B is followed module with amplification and exchanged a upper/lower positions, in fact effect is different greatly, and entire circuit can obtain simplification, and the minimizing noise.
Described attenuation module A comprises relay A, and described attenuation module B comprises relay B, and described control treatment module is connected with described relay A, described relay B respectively.
Described attenuation module A and described attenuation module B comprise the damping resistance lattice network respectively.
The damping resistance lattice network of described attenuation module B comprises resistor voltage divider circuit.
Described amplification is followed module and is comprised amplifying circuit.
It is that gain amplifier is 1 amplifying circuit that module is followed in described amplification.
Described amplification module is the signal amplification circuit of being made up of amplifier.
Described load module can be keyboard, mouse, USB flash disk interface and the interface that links to each other with PC, as: USB interface, RS232, LAN, GPIB etc.
Described display module can be LCDs or plasma panel.
Described memory module can be memory banks such as RAM, FLASH.
The utility model has following beneficial effect compared with prior art:
Can avoid in the process of decay, introducing noise as far as possible, and the reduction of the signal to noise ratio (S/N ratio) that causes.
This method of attachment has strengthened the driving force of the signal that enters attenuation module B, so simplified the circuit of attenuation module B, makes circuit simple, and cost is low, saves the space of circuit board.
Description of drawings
Fig. 1 has shown the oscillographic schematic diagram of prior art
Fig. 2 has shown theory diagram of the present utility model
Fig. 3 has shown embodiment theory diagram of the present utility model
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model.As shown in Figure 3, the schematic diagram of embodiments of the invention, it comprises attenuation module A, amplifies and follow module, attenuation module B, amplification module, A/D modular converter, control treatment module, load module, memory module, display module.
Wherein, the circuit among the attenuation module A of the attenuator circuit among the attenuation module A and prior art is similar.But signal is after following module through amplification, and driving force strengthens, so the circuit structure of attenuation module B can be simplified greatly, as shown in Figure 3, has just realized decay with simple resistor voltage divider circuit RA and RB.Such as, the RA resistance is 150k Ω, and the RB resistance is 100k Ω, and then the potential-divider network of this formation has been realized the decay of (150+100)/100=2.5 multiplying power.Its attenuator circuit is compared to prior art have been simplified greatly.
Enter amplification module after signal is exported and amplify from attenuation module B, again through A/D modular converter sampling, convert digital signal to after, send control treatment module to, control treatment module processs and displays Wave data.
Claims (5)
1. oscillograph with two attenuators, comprise attenuation module A, amplify and follow module, attenuation module B, amplification module, the A/D modular converter, control treatment module, load module, memory module, display module, the output terminal of described amplification module links to each other with the input end of described A/D modular converter, the output terminal of described A/D modular converter links to each other with described control treatment module, described control treatment module respectively with described attenuation module A, described attenuation module B connects, it is characterized in that: the output terminal of described attenuation module A links to each other with the input end that module is followed in described amplification, the output terminal that module is followed in described amplification links to each other with the input end of described attenuation module B, input signal carries out attenuation of the first kind through described attenuation module A, follow module with the enhancing signal driving force through described amplification, carry out the attenuation of the second kind through described attenuation module B, amplify once more by described amplification module, by described A/D modular converter, be converted into digital signal and output to described control treatment module at last.
2. a kind of oscillograph with two attenuators according to claim 1 is characterized in that described attenuation module A comprises relay A, and described attenuation module B comprises relay B, and described control treatment module is connected with described relay A, described relay B respectively.
3. a kind of oscillograph with two attenuators according to claim 1 is characterized in that described amplification is followed module and comprised amplifying circuit.
4. a kind of oscillograph with two attenuators according to claim 1 is characterized in that described attenuation module A and described attenuation module B comprise the damping resistance lattice network respectively.
5. a kind of oscillograph with two attenuators according to claim 4 is characterized in that the damping resistance lattice network of described attenuation module B comprises resistor voltage divider circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201543142U CN201066366Y (en) | 2007-05-17 | 2007-05-17 | An oscillograph with dual attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201543142U CN201066366Y (en) | 2007-05-17 | 2007-05-17 | An oscillograph with dual attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201066366Y true CN201066366Y (en) | 2008-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201543142U Expired - Lifetime CN201066366Y (en) | 2007-05-17 | 2007-05-17 | An oscillograph with dual attenuator |
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| CN (1) | CN201066366Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053183A (en) * | 2009-11-10 | 2011-05-11 | 北京普源精电科技有限公司 | Digital oscilloscope with impedance matching function |
| CN102053172A (en) * | 2009-11-10 | 2011-05-11 | 北京普源精电科技有限公司 | High-resistance broadband attenuation circuit and oscilloscope using same |
| CN102565485A (en) * | 2011-12-12 | 2012-07-11 | 江苏绿扬电子仪器集团有限公司 | Preamplifier for digital phosphor oscilloscope |
| CN104374974A (en) * | 2014-11-25 | 2015-02-25 | 苏州立瓷电子技术有限公司 | Oscilloscope with layered multiple amplification circuit |
| CN104374972A (en) * | 2014-11-25 | 2015-02-25 | 苏州立瓷电子技术有限公司 | High-accuracy oscilloscope |
| CN106932627A (en) * | 2015-12-29 | 2017-07-07 | 苏州普源精电科技有限公司 | A kind of probe circuit |
-
2007
- 2007-05-17 CN CNU2007201543142U patent/CN201066366Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053183A (en) * | 2009-11-10 | 2011-05-11 | 北京普源精电科技有限公司 | Digital oscilloscope with impedance matching function |
| CN102053172A (en) * | 2009-11-10 | 2011-05-11 | 北京普源精电科技有限公司 | High-resistance broadband attenuation circuit and oscilloscope using same |
| CN102053183B (en) * | 2009-11-10 | 2015-04-22 | 北京普源精电科技有限公司 | Digital oscilloscope with impedance matching function |
| CN102565485A (en) * | 2011-12-12 | 2012-07-11 | 江苏绿扬电子仪器集团有限公司 | Preamplifier for digital phosphor oscilloscope |
| CN104374974A (en) * | 2014-11-25 | 2015-02-25 | 苏州立瓷电子技术有限公司 | Oscilloscope with layered multiple amplification circuit |
| CN104374972A (en) * | 2014-11-25 | 2015-02-25 | 苏州立瓷电子技术有限公司 | High-accuracy oscilloscope |
| CN106932627A (en) * | 2015-12-29 | 2017-07-07 | 苏州普源精电科技有限公司 | A kind of probe circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING RIGOL TECHNOLOGIES, INC. Free format text: FORMER OWNER: WANG YUE Effective date: 20110510 Free format text: FORMER OWNER: WANG TIEJUN LI WEISEN |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110510 Address after: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Patentee after: Beijing Rigol Technologies, Inc. Address before: 102206 Beijing City, Shahe Town, step on the river village, No. 156 Co-patentee before: Wang Tiejun Patentee before: Wang Yue Co-patentee before: Li Weisen |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080528 |