CN104586435B - Pulse bandwidth and amplitude adjustable broadband high-pressure narrow pulse system and pulse generating method - Google Patents
Pulse bandwidth and amplitude adjustable broadband high-pressure narrow pulse system and pulse generating method Download PDFInfo
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- CN104586435B CN104586435B CN201410835429.2A CN201410835429A CN104586435B CN 104586435 B CN104586435 B CN 104586435B CN 201410835429 A CN201410835429 A CN 201410835429A CN 104586435 B CN104586435 B CN 104586435B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/10—Eye inspection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/13—Tomography
- A61B8/14—Echo-tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4411—Device being modular
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Abstract
The invention belongs to the technical field of high-frequency high-pressure pulses and discloses a pulse bandwidth and amplitude adjustable broadband high-pressure narrow pulse system and a pulse generating method. The system comprises a control signal adjusting module, a MOSFET driving module, a P-type MOSFET, an N-type MOSFET and a pulse amplitude adjusting module. The control signal adjusting module is connected with the MOSFET driving module which is connected with the P-type MOSFET and the N-type MOSFET, and the pulse amplitude adjusting module is connected with the P-type MOSFET and the N-type MOSFET. The bandwidth and amplitude of the pulses generated by the pulse bandwidth and amplitude adjustable broadband high-pressure narrow pulse system are easy to adjust and control, and the frequency of the pulses is very high, and the pulse bandwidth and amplitude adjustable broadband high-pressure narrow pulse system can be used for improving the corresponding performance of a high-frequency ultrasonic imaging system and can also meet the requirements of energy converters with different frequencies for testing and imaging application.
Description
Technical field
The invention belongs to hf and hv pulse technical field, it is related to hf and hv pulse system and method for generating pulse, special
It is not to be related to pulsewidth amplitude adjustable broadband high voltage narrow pulse system and method for generating pulse.
Background technology
High-voltage pulse excitation module is a critical component in ultrasonic device.In ultrasonic image-forming system, transducer is through height
Pressure pulse excitation produces ultrasonic wave, and then transducer receives the imaging of Tissue reflectance echo-signal again.High-voltage pulse transmitter module is
The pith of pulse echo method ultrasonic diagnostic equipment, has a significant impact to performances such as the imaging of instrument, signal to noise ratios.Current is super
In below 20mhz, corresponding driving pulse frequency easily reaches sonic transducer equipment general work.But ultrasonic in intravascular,
In the fields such as ophthalmology, in order to obtain good lateral resolution, transducer general work in more than 20mhz, even up to
60mhz, corresponding it is desirable to there be the pulse signal of higher frequency to carry out exciting of transducer.Additionally, high-voltage pulse transmitter module
The test module acting not only as high-frequency transducer is used alone a son it is also possible to as hyperfrequency applications of ultrasound instrument
Module is integrated in the middle of system.
Content of the invention
Technical problem to be solved: in conventional ultrasonic image-forming system the bandwidth of excitation signal, amplitude be difficult to adjust and
Control, and its pulse frequency relatively low it is impossible to preferably meet the problem using needs in ultrasonic image-forming system.
Technical scheme: in order to solve the above problems, the invention discloses pulsewidth amplitude adjustable broadband high voltage narrow pulse system
System, including control signal adjusting module, mosfet drive module, p-type mosfet and N-shaped mosfet, pulse amplitude adjusting module,
Control signal adjusting module connects mosfet drive module, and mosfet drive module connects p-type mosfet and N-shaped mosfet, pulse width
Value adjusting module accesses p-type mosfet and N-shaped mosfet.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, described control signal adjusting module includes pulse
Signal source, logic level translator part or logic level converting circuit, pulse-width controlled part, p-type mosfet and N-shaped mosfet drive
Moving pulse sequential adjustment member.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, described pulse signal source is field-programmable door
Array or microprocessor mcu, general AC signal source, crystal oscillator, dsp, arm or cpld input.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, pulse-width controlled part comprises time delay device and non-
Door and door；Through logic level transition output positive pulse divide two-way, a road is followed by delay process through not gate, then with addition
One road is accessed and door, becomes the control signal obtaining specific pulsewidth, and specific pulse-width control signal exports pulse；Specific pulsewidth
Control signal divides two-way, respectively through time delay, mates p-type mosfet and N-shaped mosfet either on or off time, accesses mosfet and drives
Dynamic model block.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, described time delay device is single time delay device
Ds1100u, multiple ds1100u or coaxial line.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, described time delay device includes clock, counter
And time delay network.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, pulse amplitude adjusting module comprise high voltage power supply and
High voltage output adjusts part.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, described high voltage power supply is high pressure positive supply
Emco-ca02p and high pressure negative supply emco-ca02n, digital to analog converter connects high pressure positive supply emco-ca02p and high pressure negative supply
The voltage output of emco-ca02n adjusts port, thus adjusting High voltage output, the amplitude realizing pulse is adjusted.
Described pulsewidth amplitude adjustable broadband high voltage narrow pulse system, high voltage power supply is positive supply emco-ca02p, meets p
Type mosfet, output pulse is positive pulse；High voltage power supply is negative supply emco-ca02n, meets N-shaped mosfet, output pulse is negative
Pulse；High voltage power supply is positive supply emco-ca02p and emco-ca02n, meets p-type mosfet and N-shaped mosfet respectively, exports arteries and veins
Rush bipolar pulse.
The production method of described pulsewidth amplitude adjustable broadband high voltage narrow pulse system pulses:
The signal incoming control signal adjusting module of signal input part, input signal is divided two by control signal adjusting module
Road, a road connects time delay device delay process through not gate；An other road is accessed and door, produces ns level burst pulse with gate output terminal,
Pulse width is determined by delay time；This burst pulse is divided into two paths of signals, and double channel mosfet either on or off is mated in time delay, controls
Mosfet drives, thus opening or closing double channel mosfet；Adjust output pulse by changing the width controlling pulse
Pulsewidth；
Pulse output amplitude is realized by changing high voltage power supply output amplitude；System Working Principle is as shown in Figure 1.
By logic level translator part or circuit, realize programming device (as field-programmable gate array is programmable
Device, microprocessor mcu) control signal (as lvpecl, lvds) that exports arrives pulse module and controls level (as lvttl, ttl)
Conversion, or directly adopt signal source input signal.
Delay disposal part realizes the change of pulsewidth, also realizes pulse bandwidth and the change of pulse center frequencies simultaneously:
Principle is as follows:
Because the device producing pulse is operated in pulse switch state it is assumed that pulse is preferable, then on state characteristic is permissible
Replaced with rectangular voltage function, by change pulsewidth adjust the principle function described as follows of frequency and Figure of description 7a,
Fig. 7 b, Fig. 7 c, Fig. 7 d:
Original waveform is,
A > 1 time domain data compression, frequency domain expansion a times；0 < a < 1 time domain extension, band compression；
The reduction of pulse width, then corresponds to the increase of pulse -3db cut-off frequency；
So, the corresponding pulsewidth of higher frequency is narrower；The positive pulse that the pulsewidth that signal generator produces is ta is prolonged
When, delay time is tb(tb < ta), then carry out logical AND by obtaining signal after time delay with original signal, so in theory can
To obtain pulsewidth for the pulse of (ta-tb), such as Figure of description 8.
Because, so high-voltage pulse amplitude changes, the cut-off frequency corresponding to pulse also can become
Change.
Signal generator or other signal sources (crystal oscillator, programming device output) produce square-wave pulse；
Shaping is carried out by not gate to signal generator waveform, reduces rising edge and the trailing edge time of signal；
Signal divides two-way, and a road is a through non-delay process behind the door, time delay, is then connected and door with another road signal, warp
Cross after processing with door, just can arrive the positive pulse that pulsewidth is a in theory；
Using the signal for a for the pulsewidth as p-channel mosfet and n-channel mosfet switch controlling signal；
Control signal controls mosfet to drive, thus opening or closing double channel mosfet；
Programming device controls high voltage power supply output, thus changing the amplitude of output waveform.
Beneficial effect: the pulsewidth amplitude adjustable broadband high voltage narrow pulse system of the present invention and its its production method have following
Advantage:
1. control signal can access from signal generator, by the conversion of gate and time delay device or circuit, from
The very narrow control signal of pulsewidth is obtained in one big very low control signal of pulse duration frequency (can be low-frequency clock signal).
Gate use not gate and with door；Control signal can also be obtained by logic level transition, such as utilizes various logic to change
Device, realize from the level conversion such as lvpecl, lvds, cmos of the device such as programming device, cpld, dsp, mcu be lvtll,
The logic levels such as ttl, then on the basis of these logic level signals, again by gate, time delay device conversion, obtain narrow
The signal of pulsewidth.As programming device fpga exports lvpecl logical signal, by logical transition chip
Sn65lvelt23dgk, differential signal is converted to lvttl level, thus realizing Far end control signal to the connection of pulse module
Transmission.
2. the control of the pulsewidth of pulse be by time delay device (as ds1100u family chip) and with logical device Lai real
Existing.Time delay device includes and is not limited to single time delay ic, can be several time delay devices series connection reach specific certain
Delay value.To realize 5ns to hundreds of ns delay value, more accurately, easy control wave width.
3. different control pulsewidths corresponds to the pwm value of different output pulses, changes and controls pulse width, and correspondence changes
Become centre frequency and the cut-off frequency of output high-voltage pulse.
4. High voltage output can be adjusted by programming device, flexible regulation high-voltage pulse amplitude.
5. adopt peak point current be more than 10a mosfet drive (as integrated driving device, discrete bipolar transistors or
The drive circuit of person's FET push-pull configuration composition), thus can increase mosfet switching speed as far as possible, be risen
The pulse of trailing edge very little.
6. adjustment positive or negative high voltage power supply connects, and flexibly obtains positive pole, negative pole, bipolarity high-voltage pulse.
Brief description
Fig. 1 is that pulsewidth amplitude adjustable broadband high voltage narrow pulse system pulses produce schematic diagram；
Fig. 2 is pulsewidth amplitude adjustable broadband high voltage narrow pulse system construction drawing.
Fig. 3, Fig. 4 are the single bipolar pulse figure of embodiment 1.
Fig. 5, Fig. 6 are the single bipolar pulse figure of embodiment 2.
Fig. 7 is the schematic diagram adjusting frequency by changing pulsewidth.
Fig. 8 is the pulse diagram of (ta-tb) for pulsewidth.
Specific embodiment
Embodiment 1
Field-programmable gate array output control signal (logic level is lvpecl), meeting sn65lvelt23dgk will
Lvpecl level conversion is lvttl level, and this signal divides two-way, and a road one tunnel is anti-phase through not gate sn74lvc1g04, then connects and prolong
When device ds1100u-35+ time delay 7ns then with other one road access with door sn74ahct1g08 input, with door output signal
It is divided into two-way, a road is followed by the driving element el7158 of p-type mosfet through ds1100u time delay, another road connects ds1100u time delay
It is followed by N-shaped mosfet driving element el7158, two panels el7158 controls p-type mosfet and N-shaped mosfet either on or off respectively, high
Voltage source emco-ca02p output end (pin 1) connects p-type mosfet source electrode output control terminal (pin 2), and to connect digital to analog converter defeated
Go out, digital to analog converter input termination field-programmable gate array, controlled the output of pulse, N-shaped by field-programmable gate array
Mosfet source ground.Single positive pulse such as Fig. 3 and Fig. 4.
Embodiment 2
The pulse signal of alternating message source agilent 81150a output is as input signal, pulse frequency 1khz, amplitude
4v, pulse rise time 10ns, fall time 10ns, pulsewidth 100ns.This signal divides two-way, and a road is through not gate
Sn74lvc1g04 is anti-phase, then connects time delay device ds1100u time delay, then accesses and door with an other road input signal
Sn74ahct1g08 input, is divided into two-way with door output signal, and road ds1100u delays time to control p-type mosfet drives
El7158, thus controlling N-shaped mosfet to drive el7158 after the ds1100u time delay of another road, two panels el7158 controls p-type respectively
Mosfet and N-shaped mosfet either on or off, high voltage power supply emco-ca02p output end (pin 1) connects p-type mosfet source electrode, output
Control end (pin 2) connects digital to analog converter output end, and high voltage power supply emco-ca02n output end (pin 1) connects N-shaped mosfet source
Pole, output control terminal (pin 2) connects digital to analog converter output end, and digital to analog converter input terminates field-programmable gate array, by
Field-programmable gate array controls the output of pulse.Single bipolar pulse such as Fig. 5 and Fig. 6.
Claims (1)
1. pulsewidth amplitude adjustable broadband high voltage narrow pulse system it is characterised in that: include control signal adjusting module, mosfet
Drive module, p-type mosfet and N-shaped mosfet, pulse amplitude adjusting module, control signal adjusting module meets mosfet and drives mould
Block, mosfet drive module meets p-type mosfet and N-shaped mosfet, and pulse amplitude adjusting module accesses p-type mosfet and N-shaped
mosfet；
Described control signal adjusting module include pulse signal source, logic level translator part or logic level converting circuit,
Pulse-width controlled part, p-type mosfet and N-shaped mosfet driving pulse sequential adjustment member；
Pulse-width controlled part comprises time delay device and not gate and door；Divide two-way through the positive pulse of logic level transition output, one
Road is followed by delay process through not gate, then accesses and door with an other road, becomes the control signal obtaining specific pulsewidth, specific pulsewidth
Control signal exports pulse；The control signal of specific pulsewidth divides two-way, respectively through time delay, mates p-type mosfet and N-shaped
The mosfet either on or off time, access mosfet drive module.
2. the pulsewidth amplitude adjustable broadband high voltage narrow pulse system according to claim 1 it is characterised in that: described
Pulse signal source be field-programmable gate array, microprocessor mcu, general AC signal source, crystal oscillator, dsp, arm or cpld
Input.
3. the pulsewidth amplitude adjustable broadband high voltage narrow pulse system according to claim 1 it is characterised in that: described
Time delay device be single time delay device ds1100u, multiple ds1100u or coaxial line.
4. pulsewidth amplitude adjustable broadband high voltage narrow pulse system according to claim 1 it is characterised in that: described
Time delay device includes clock, counter and time delay network.
5. the pulsewidth amplitude adjustable broadband high voltage narrow pulse system according to claim 1 it is characterised in that: pulse
Range-adjusting module comprises high voltage power supply and High voltage output regulation part.
6. the pulsewidth amplitude adjustable broadband high voltage narrow pulse system according to claim 5 it is characterised in that: described
High voltage power supply be high pressure positive supply emco-ca02p and high pressure negative supply emco-ca02n, digital to analog converter connects high pressure positive supply
The voltage output of emco-ca02p and high pressure negative supply emco-ca02n adjusts port, thus adjusting High voltage output, realizes pulse
Amplitude adjust.
7. pulsewidth amplitude adjustable broadband high voltage narrow pulse system according to claim 5 it is characterised in that: high-tension electricity
Source is positive supply emco-ca02p, connects p-type mosfet, and output pulse is positive pulse；Or high voltage power supply is negative supply emco-
Ca02n, meets N-shaped mosfet, and output pulse is negative pulse；Or high voltage power supply is positive supply emco-ca02p and emco-ca02n,
Meet p-type mosfet and N-shaped mosfet respectively, export pulsed bipolar pulse.
8. the production method of the adjustable broadband of pulsewidth amplitude according to claim 1 high voltage narrow pulse system pulses, its
The method being characterised by described comprises the following steps:
The signal incoming control signal adjusting module of signal input part, input signal is divided two-way by control signal adjusting module, and one
Road connects time delay device delay process through not gate；An other road is accessed and door, produces ns level burst pulse, pulse width with gate output terminal
Degree is determined by delay time；This burst pulse is divided into two paths of signals, and double channel mosfet either on or off is mated in time delay, controls mosfet
Drive, thus opening or closing double channel mosfet；Adjust the pulsewidth of output pulse by changing the width controlling pulse；
Pulse output amplitude is realized by changing high voltage power supply output amplitude.
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| CN105958976A (en) * | 2016-06-08 | 2016-09-21 | 中国科学院合肥物质科学研究院 | Adjustable high-voltage pulse generator applied to mass spectrometer |
| CN106230412B (en) * | 2016-07-08 | 2018-11-20 | 中国人民解放军国防科学技术大学 | It is a kind of to integrate push-pull type narrow pulse driver towards silicon optical switch |
| CN106685377B (en) * | 2017-03-29 | 2024-01-26 | 烟台中正新技术有限公司 | Narrow pulse generating circuit and adjustable width single pulse generator |
| CN109981084B (en) * | 2017-12-27 | 2023-06-30 | 一诺仪器（中国）有限公司 | FPGA-based narrow pulse output system and method |
| CN109471014B (en) * | 2018-10-30 | 2021-01-19 | 江苏赛诺格兰医疗科技有限公司 | Detection signal simulation forming circuit and detector board card test platform |
| CN109905103A (en) * | 2019-02-22 | 2019-06-18 | 西安交通大学 | A kind of stretch circuit combining digital logical operation based on delay |
| CN110221233A (en) * | 2019-05-30 | 2019-09-10 | 北京无线电计量测试研究所 | A kind of the standard harmonic signal output apparatus and device of non-linear S-parameters |
| CN110327555B (en) * | 2019-08-08 | 2024-05-03 | 山东新华医疗器械股份有限公司 | Medical linear accelerator and medical instrument |
| CN117439581B (en) * | 2023-12-21 | 2024-05-17 | 深圳青铜剑技术有限公司 | Narrow pulse suppression circuit and method |
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| JP2003265466A (en) * | 2002-03-12 | 2003-09-24 | Olympus Optical Co Ltd | Ultrasonograph |
| WO2007131337A1 (en) * | 2006-05-12 | 2007-11-22 | The Governors Of The University Of Alberta | Ultrasound stimulation devices and techniques |
| CN101972154A (en) * | 2010-11-22 | 2011-02-16 | 中国医学科学院生物医学工程研究所 | Ultrasound emitting system for high frequency ultrasonic diagnostic equipment |
| CN102721632A (en) * | 2011-03-29 | 2012-10-10 | 丹东东方测控技术有限公司 | High frequency ultrasonic signal generator |
| CN204445946U (en) * | 2014-12-29 | 2015-07-08 | 中国科学院苏州生物医学工程技术研究所 | The broadband high voltage narrow pulse system that pulsewidth amplitude is adjustable |
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Application publication date: 20150506 Assignee: SHENYANG SHENDA ENDOSCOPE Co.,Ltd. Assignor: Suzhou Institute of Biomedical Engineering and Technology Chinese Academy of Sciences Contract record no.: X2020980005455 Denomination of invention: Broadband high voltage narrow pulse system with adjustable pulse width and amplitude and pulse generation method Granted publication date: 20170118 License type: Common License Record date: 20200827 |