CN103592996A - Structure and device of plug-in multichannel function/arbitrary waveform generator - Google Patents
Structure and device of plug-in multichannel function/arbitrary waveform generator Download PDFInfo
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- CN103592996A CN103592996A CN201210286925.8A CN201210286925A CN103592996A CN 103592996 A CN103592996 A CN 103592996A CN 201210286925 A CN201210286925 A CN 201210286925A CN 103592996 A CN103592996 A CN 103592996A
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Abstract
The invention relates to a structure and a device of a plug-in multichannel function/arbitrary waveform generator. The plug-in multichannel function/arbitrary waveform generator comprises a panel control system, a main controller system, a clock driving and bus isolation system and a waveform generation system, the panel control system comprises a front panel controller, a digital code switch, a keyboard and the like, the main controller system comprises a main controller, an RS-232 interface, a USB (universal serial bus) interface, a local area network interface, a touch screen and LCD (liquid crystal display), a digital output interface, a GPIB (general purpose interface bus), a storage and an interface, the clock driving and bus isolation system comprises a clock driving unit, serial buses and n bus isolation units, the waveform generation system comprises function/arbitrary waveform generator plug-in units of n channels, n expansion slots and n address setting circuits, each function/arbitrary waveform generator plug-in unit comprises a waveform generation and control circuit, a DAC (digital-to-analog converter) and a filter and signal conditioning circuit, and the panel control system, the serial buses, the main controller system, the clock driving and bus isolation system and the waveform generation system are sequentially connected.
Description
Affiliated technical field
Structure and the device of card insert type hyperchannel function/arbitrary waveform generator disclosed by the invention, the card insert type hyperchannel function/arbitrary waveform generator described in it, relates to electronic measuring instrument field, is specifically related to waveform generator.
Background technology
Structure and the device of card insert type hyperchannel function/arbitrary waveform generator disclosed by the invention, be intended to Solving Multichannel function/arbitrary waveform generator complex structure problem, for the digital and analog circuit in each channel circuit plug-in card, there is circuit structure and the identical feature of parameter, the present invention hangs over a plurality of plug-in cards on the universal serial bus of an one master and multiple slaves structure, the command frame that contains zone bit by transmission by a controller and the address code of expansion slot are accessed plug-in card a plurality of or that refer in particular to, structure and device due to card insert type hyperchannel function/arbitrary waveform generator of the present invention, be different from PXI or VXI cabinet card insert type complex bus instrument, be different from again one-board hyperchannel function/arbitrary waveform generator, have simple for structure, clear, be easy to the distinguishing feature of expansion, reduced the difficulty of noise and circuit technology wiring simultaneously.
Summary of the invention
Structure and the device of card insert type hyperchannel function/arbitrary waveform generator disclosed by the invention, described card insert type hyperchannel function/arbitrary waveform generator is comprised of four systems module, they are panel control system module (100), main controller system module (200), clock driving & Bus isolation system module (400) and waveform generation system module (300), wherein, described panel control system module comprises: front panel controller circuitry, numerical coding on-off circuit, keyboard circuit and LED indicating circuit; Described main controller system module comprises: main controller circuit, RS-232 interface circuit, usb circuit, local area network interface circuit LAN, touch-screen & LCD circuit, digital output interface circuit, gpib interface circuit, storer and interface circuit, mouse interface circuit and crystal oscillating circuit; Described clock drives & Bus isolation system module to comprise: n the Bus isolation unit that clock driver element, universal serial bus and the sequence number that contains a temperature compensating crystal oscillator is 1#～n#; Described waveform generation system module comprises: the function/arbitrary waveform generator plug-in card unit of the n that sequence number is a 1#～n# passage, a n plug-in card expansion slot and n expansion slot address setting circuit; Described function/arbitrary waveform generator plug-in card unit comprises: waveform generates & control circuit, DAC circuit and filtering & signal conditioning circuit; It is characterized in that: panel control system module (100), universal serial bus (500), main controller system module (200), clock drive & Bus isolation system module (400) and waveform generation system module (300) to be linked in sequence.
Described universal serial bus, is characterized in that: can be that synchronous serial bus can also be asynchronous serial bus.
Described Bus isolation unit, is characterized in that: universal serial bus (410) is the serial communication bus of one master and multiple slaves, and buses isolator unit is the device of non-electrical couplings.
Described sequence number is the function/arbitrary waveform generator plug-in card unit of n the passage of 1#～n#, it is characterized in that: the function/arbitrary waveform generator plug-in card unit of each passage has identical electrical structure, electric parameter and physical dimension.
It is upper that described n function/arbitrary waveform generator plug-in card unit is suspended to a universal serial bus BUS_COM by corresponding expansion slot, it is characterized in that: in technique, require from master controller bus port isometric to each signal line of the bus port of each expansion slot again by isolator.
Described clock drives & Bus isolation system module, it is characterized in that: described universal serial bus (410) can be Serial Peripheral Interface (SPI) (Serial Peripheral Interface, be abbreviated as SPI) four-wire system bus, give up NSS, use three signal wires wherein, a serial time clock line SCLK, is used for synchronized transmission and receive data; A MOSI line, is used for sending synchronous serial data; A MISO line, is used for receiving synchronous serial data; Corresponding Bus isolation unit is also used three ports.
Described card insert type hyperchannel function/arbitrary waveform generator, it is characterized in that: master controller is to n function/arbitrary waveform generator waveform plug-in card unit (301, 302, 303, ..., the address code sign of a bit function/AWG (Arbitrary Waveform Generator) plug-in card unit that is provided with a mass-sending/single-shot sign in command frame 30n) sending and arranges by the rule of n=2^a, command frame for certain transmission, each function/arbitrary waveform generator waveform plug-in card unit receives command frame and first mass-sending/single-shot zone bit is judged, or carry out mass-sending function or carry out single-shot function, if single-shot function will be by the address code comparison of a position single-shot sign in command frame and this plate plug-in card expansion slot initialization circuit, if consistent, can be confirmed to be and send to the single-shot order of this function/arbitrary waveform generator waveform plug-in card unit and carried out, other plug-in card is not carried out any operation.
The structure of above-mentioned card insert type hyperchannel function/arbitrary waveform generator and device design according to modular design principle completely, circuit structure is simple, compact, clear, reduced power consumption simultaneously, reduced wiring difficulty, particularly more at port number, for example the occasion of port number n >=4 is very considerable.
Accompanying drawing explanation
Accompanying drawing 1 is structure diagram of the present invention, wherein numbering 100 is panel control system modules, and numbering 200 is main controller system modules, and numbering 300 is waveform generation system modules, numbering 400 is that clock drives & Bus isolation system module, and numbering 500 is universal serial bus.
Accompanying drawing 2 is the structure of card insert type hyperchannel function/arbitrary waveform generator of the present invention and the structured flowchart of device, numbering 100 is panel control system modules, wherein, 100_1 is front panel controller circuitry, 100_2 is numerical coding on-off circuit, 100_3 is keyboard circuit, and 100_4 is LED indicating circuit, numbering 500 is universal serial bus BUS_ITF that panel control system module is connected with main controller system module, numbering 200 is main controller system modules, wherein, 200_1 is main controller circuit, and 200_2 is RS-232 interface circuit, 200_3 is usb bus interface circuit, 200_4 is network interface circuit LAN, and 200_5 is touch-screen & LCD circuit, and 200_6 is digital output interface circuit, 200_7 is gpib interface circuit, 200_8 is storer and interface circuit, and 200_9 is mouse interface circuit, 200_10 crystal oscillating circuit, numbering 300 is waveform generation system modules, wherein, 301,302,303 ..., 30n be respectively sequence number be 1#, 2#, 3# ..., the function/arbitrary waveform generator plug-in card unit of n the passage of n#, wherein, 301_2, 302_2, 303_2 and 30n_2 are respectively that n the waveform in function/arbitrary waveform generator plug-in card unit generates & control circuit, 301_3, 302_3, 303_3, ..., 30n_3 is respectively n digital/analog converter (DAC) circuit in function/arbitrary waveform generator plug-in card unit, 301_4, 302_4, 303_4, ..., 30n_4 is respectively n the filtering & signal conditioning circuit in function/arbitrary waveform generator plug-in card unit, 301_1, 302_1, 303_1, ..., 30n_1 is respectively n plug-in card expansion slot, 301_5, 302_5, 303_5......, 30n_5 is respectively the address setting circuit of n expansion slot, 301_6, 302_6, 303_6, ..., 30n_6 is the waveform voltage signal of the output of n passage, numbering 400 is that clock drives & Bus isolation system module, wherein, 400_1 is clock driver element, 401,402,403 ..., 40n be respectively sequence number be 1#, 2#, 3# ..., n the Bus isolation unit of n#, the 410th, serial communication bus.
Accompanying drawing 3 is by the structural drawing of panel control system module and main controller system block merging.
Accompanying drawing 4 is a kind of crystal oscillator driving circuits.
Bus isolation unit connection diagram when accompanying drawing 5 is three-wire system bus SPI.
Accompanying drawing 6 is wiring diagrams of a kind of embodiment of address setting circuit.
Accompanying drawing 7 is zone bit schematic diagram that the command frame of master controller transmission shows.
Accompanying drawing 8 is workflow diagrams of n passage function/arbitrary waveform generator plug-in card unit of master controller access.
Embodiment
The structure of card insert type hyperchannel function/arbitrary waveform generator of the present invention and the specific implementation brief introduction of device are as follows:
The concrete embodiment of each system module, functional unit and circuit
(1), panel control system module
The described panel control system module of scheme (1) can comprise front panel controller circuitry, keyboard circuit, digital encoding by-pass cock circuit and LED indicating circuit, also can increase and decrease according to specific needs; Front panel controller circuitry is used for the action of supervisory keyboard circuit, numerical coding on-off circuit, after analysis, send to main controller circuit, or receive the control information that master controller sends and light the corresponding LED light of front panel, complete the information interaction with main controller circuit; Front panel controller can be selected processing power and the relatively low microprocessor of arithmetic speed, such as 51 single-chip microcomputers, AVR single-chip microcomputer, PIC single-chip microcomputer or arm processor etc., and also optional CPLD chip completes.
Scheme (2) panel control system module can also be incorporated to main controller system module, and the function of front panel controller circuitry is completed in the lump by main controller circuit, as shown in Figure 3.
Along with the continuous decline of microprocessor price, the scheme that panel control system module and primary processor control system module are separated, realizes main controller system module and panel control system module information is mutual by bus, more meets the requirement of modular design.The bus here can be SPI universal serial bus, can be also UART universal serial bus, can also be I2C universal serial bus.
(2), main controller system module
Described main controller system module comprises: main controller circuit, crystal oscillating circuit, RS-232 interface circuit, usb circuit, local area network interface circuit LAN, touch-screen & LCD circuit, digital output interface circuit, gpib interface circuit, storer and interface circuit and mouse interface circuit, much all belong to option, can increase and decrease according to demand, for example increase SD card, or increase and decrease storer capacity or by its choice.
1, main controller circuit
Main controller circuit is generally realized by microprocessor, can select dsp processor, arm processor, single-chip microcomputer, Duo CPU and interface or PCI04 plate etc., for spirit of the present invention without essential distinction.For example select the arm processor S3C2410/2440A of SAMSING company, also the microprocessors such as STM32F10X/20X/40X of optional Yi Fa company.
2, the effect of master controller in system
In conjunction with figure attached 2, main controller system module completes information interaction by the front panel controller circuitry in universal serial bus BUS_ITF and panel control system module on the one hand, the technical indicator information such as the type of waveform of user's input, waveform parameter are analyzed, generated the register command of waveform generation & control circuit in access function/AWG (Arbitrary Waveform Generator) plug-in card unit; According to family order, send to the waveform in function/arbitrary waveform generator plug-in card unit to generate & control circuit the resource of system (such as information such as Wave datas) on the other hand, finally make the waveform of function/arbitrary waveform generator output customer requirements; Master controller also monitors the input action of touch-screen and is analyzed and carry out corresponding operating, comprised the operation that refreshes LCD display interface figure.
(3), universal serial bus
Described universal serial bus refers to the universal serial bus of joint face panel control system module and main controller system module, can use UART or spi bus.
(4), clock drives & Bus isolation system module
1, clock and clock drive
Scheme (1) waveform generation system module is used separately a crystal oscillator: in precision prescribed and the higher function/arbitrary waveform generator of stability, its waveform generation system module is used temperature compensating crystal oscillator, for improving load capacity, add driving chip, here the driving chip MAX9120 that uses MAX company, its wiring diagram as shown in Figure 4.
The whole instrument of scheme (2) uses a crystal oscillator: now cancel the crystal oscillator (200_10) of master controller, the crystal oscillator in 400_1 completes, and is adjusted the dominant frequency of master controller by the phaselocked loop (PLL) of master controller inside.
2, Bus isolation unit
Bus isolation unit in the described Bus isolation system module product digital isolator chip of generally hanking, adopts the ADuM1401 chip of magnetic medium isolation etc. such as U.S. AD company.Described universal serial bus can be synchronous serial bus, can also be asynchronous serial bus, and concrete scheme is exemplified below:
Scheme (1) is used spi bus: spi bus is four-wire system synchronous serial bus, the present invention gives up NSS signal need not, only use SCLK, MOSI, tri-lines of MISO (by reference to the accompanying drawings 2 or 3, x=3), the scheme wiring diagram of use spi bus and isolator ADuM1401 chip as shown in Figure 5.Spi bus port SCLK_COM, MOSI_COM and the MISO_COM signal of the host processor chip that one side joint of ADuM1401 chip is connected with BUS_COM bus, power supply+3.3DVDD_0 that chip is used and ground DGND_0 and main processor circuit share; Signal wire SCLK_i, MOSI_i, MISO_i that each plug-in card expansion slot in the waveform generation system unit that another side joint of chip is connected with BUS_i bus is drawn, here i=1,2 ..., n, the power supply+3.3DVDD_i of chip and ground DGND_i share a set of power supply with corresponding plug-in card.
Scheme (2) is used UART bus: UART bus is asynchronous reception/transmission bus, use 2 (x=2) signal wires, be RXD and TXD signal wire, because UART bus speed is low compared with SPI, can use optocoupler as isolating device, for example the 6N137 opto-coupler chip of FAIRCHILD company seldom repeats herein.
Scheme (3) is used USART universal serial bus: USART universal serial bus has synchronous and asynchronous mode.Asynchronous system is the same with UART bus, and the method for synchronization will add a synchronous clock line, repeats no more herein.
(5), waveform generation system module
Structure and the device of card insert type hyperchannel function/arbitrary waveform generator of the present invention, its waveform generation system module has been used the function/arbitrary waveform generator plug-in card unit of n=4 passage, and the number of channels demand that the number of plug-in card can produce signal according to user is determined.Can between 1～n piece, select, very large n is theoretical value, in fact to consider the load capacity of bus and the factors such as signal impedance coupling that isolator arrives each plug-in card, n≤4 may be best, and n > 4 is this requires too much occasion can consider to solve better by the method for many instrument cascades to signalling channel.
Described waveform generation system module is the nucleus module of function/arbitrary waveform generator system, generally comprises waveform and generates & control circuit, DAC circuit and signal conditioning circuit;
1, waveform generates & control circuit
It is again the core of function/arbitrary waveform generator plug-in card unit that waveform generates & control circuit.The concrete inner structure that waveform generates & control circuit can decide demands such as signal types according to user, for example, use Direct Digital frequency synthesis (DDS) method.Described waveform generates & control circuit can also production burst ripple, triangular wave, square wave etc., has more the waveform that can also be generated by function of characteristic or waveform that touch screen interface draws and by the random wave of instrument system software editing.
Described waveform generates & control module and can be realized by a slice field programmable gate array (FPGA) chip, described FPGA can be that Xilinx company produces, also can be the chip that altera corp etc. produces, for the present invention without essential distinction.
2, DAC circuit
DAC circuit can decide indexs such as the frequency of output waveform, precision according to user, such as D/A converter chips such as AD9736, the AD9755 of AD company, AD9747.
3, filtering & signal conditioning circuit
Filtering & signal conditioning circuit is the indispensable circuit block of analog output signal generating.Can switch and use different wave filters according to the type selecting of output signal; Signal condition is also determined according to technical indicators such as the frequency of the type of output signal, output signal and amplitudes.
4, address setting circuit
Described address setting circuit, take four-way as example, and this address setting circuit scheme is containing 2 resistance R 0, R1, and their one end welding wave generates the input port of & control module circuit; Another termination power or ground, generate 00,01,10,11 4 kind of coding, is that the address code set of four expansion slot is for plug-in card Address Recognition.The structure of the function/arbitrary waveform generator that the present invention provides and device are that each passage is isolated mutually, for four passages, need four groups of independently power supplys, four groups of power supplys shown in accompanying drawing 6 are :+3.3DVDD_1 and DGND_1 ,+3.3DVDD_2 and DGND_2 ,+3.3DVDD_3 and DGND_3 and+3.3DVDD_4 and DGND_4.
Structure and the device of described card insert type hyperchannel function/arbitrary waveform generator, it is characterized in that: take four-way function/arbitrary waveform generator as example, referring to Fig. 7, mass-sending/single-shot zone bit the Bit_i+1 being provided with in the command frame that master controller sends to function/arbitrary waveform generator waveform plug-in card unit is mass-sending when Bit_i+1=1, Bit_i+1=0 is single-shot, mass-sending is to n function/arbitrary waveform generator waveform plug-in card unit, to send same order and data simultaneously, all function/arbitrary waveform generator waveform plug-in cards unit is judged Bit_i+1 position while receiving command frame, Bit_i+1=1 execution mass-sending function, Bit_i+1=0 will continue zone bit Bit_i and Bit_i-1 to be judged, Bit_iBit_i-1 value is 00, 01, 10, 11 4, corresponding with the address setting code of the address setting circuit of four expansion slot, all function/arbitrary waveform generator waveform plug-in cards unit receives after command frame, wherein only have a function/arbitrary waveform generator waveform plug-in card unit consistent with Bit_iBit_i-1 value, thereby be confirmed to be, send to the order of this plug-in card and carried out, other plug-in card is not carried out any operation, accompanying drawing 8 is workflows of sending and receiving command frame.
Concrete embodiment in the above embodiment; be interpreted as is only one of implementation of the present invention; the protection domain being not intended to limit the present invention; all within spirit of the present invention and principle of design; any change of doing, be equal to replacement, improvement etc., all should be considered to be encompassed among protection scope of the present invention.
Claims (6)
1. structure and the device of card insert type hyperchannel function/arbitrary waveform generator disclosed by the invention, described card insert type hyperchannel function/arbitrary waveform generator is comprised of four systems module, comprises that panel control system module (100), main controller system module (200), clock drive & Bus isolation system module (400) and waveform generation system module (300); Wherein, described panel control system module comprises: front panel controller circuitry, numerical coding on-off circuit, keyboard circuit and LED indicating circuit; Described main controller system module comprises: main controller circuit, RS-232 interface circuit, usb circuit, local area network interface circuit LAN, touch-screen & LCD circuit, digital output interface circuit, gpib interface circuit, storer and interface circuit, mouse interface circuit and crystal oscillating circuit; Described clock drives & Bus isolation system module to comprise: n the Bus isolation unit that clock driver element, universal serial bus (410) and sequence number are 1#～n#; Described waveform generation system module comprises: the function/arbitrary waveform generator plug-in card unit of the n that sequence number is a 1#～n# passage, a n plug-in card expansion slot and n expansion slot address setting circuit; Described function/arbitrary waveform generator plug-in card unit comprises: waveform generates & control circuit, DAC circuit and filtering & signal conditioning circuit; It is characterized in that: panel control system module (100), universal serial bus (500), main controller system module (200), clock drive & Bus isolation system module (400) and waveform generation system module (300) to be linked in sequence.
2. card insert type hyperchannel function/arbitrary waveform generator according to claim 1, is characterized in that: described bus (500) can be that synchronous serial bus can also be asynchronous serial bus.
3. card insert type hyperchannel function/arbitrary waveform generator according to claim 1, is characterized in that: described universal serial bus (410) is the serial communication bus of one master and multiple slaves, and buses isolator unit is the device of non-electrical couplings.
4. card insert type hyperchannel function/arbitrary waveform generator according to claim 1, it is characterized in that: the function/arbitrary waveform generator plug-in card unit of the n that described sequence number is a 1#～n# passage, the function/arbitrary waveform generator plug-in card unit of its each passage has identical electrical structure, electric parameter and physical dimension.
5. card insert type hyperchannel function/arbitrary waveform generator according to claim 1, it is characterized in that: described universal serial bus (410) can be SPI four-wire system bus, give up NSS, use three signal wires wherein, a serial time clock line SCLK, is used for synchronized transmission and receive data; A MOSI line, is used for sending synchronous serial data; A MISO line, is used for receiving synchronous serial data; Corresponding Bus isolation unit is also used three ports.
6. card insert type hyperchannel function/arbitrary waveform generator according to claim 1, it is characterized in that: master controller is to n function/arbitrary waveform generator waveform plug-in card unit (301, 302, 303, ..., the address code sign of a bit function/AWG (Arbitrary Waveform Generator) plug-in card unit that is provided with a mass-sending/single-shot sign in command frame 30n) sending and arranges by the rule of n=2^a, command frame for certain transmission, all function/arbitrary waveform generator waveform plug-in cards unit receives command frame and first mass-sending/single-shot zone bit is judged, or carry out mass-sending function or carry out single-shot function, if single-shot function will be by the address code comparison of a position single-shot sign in command frame and this plate plug-in card expansion slot initialization circuit, if consistent, can be confirmed to be and send to the single-shot order of this function/arbitrary waveform generator waveform plug-in card unit and carried out, other plug-in card is not carried out any operation.
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| CN113721056A (en) * | 2021-09-06 | 2021-11-30 | 成都能通科技有限公司 | Extensible arbitrary waveform generator bottom plate |
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| CN109557347A (en) * | 2018-11-14 | 2019-04-02 | 福建利利普光电科技有限公司 | A kind of arbitrary waveform signal generator with touch function |
| CN114691580A (en) * | 2020-12-28 | 2022-07-01 | 格科微电子（上海）有限公司 | Integrated circuit, digital circuit module, chip, camera and electronic information device |
| CN113721056A (en) * | 2021-09-06 | 2021-11-30 | 成都能通科技有限公司 | Extensible arbitrary waveform generator bottom plate |
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| Publication number | Publication date |
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| CN103592996B (en) | 2017-03-08 |
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