This application claims priority under the Paris Convention to Chinese Patent Application No. 201710671156.6, Filed Aug. 8, 2017, the entirety of which is hereby incorporated by reference for all purposes as if fully set forth herein.
The present invention relates to the field of arbitrary waveform generator, more particularly to an arbitrary waveform generator based on instruction architecture, which can generate various complex sequence waves.
Arbitrary waveform generator (AWG) is a type of signal source which develops very quickly in recent years. It can not only generate various standard waveforms, such as sinusoidal wave and square wave, which can be generated by general signal source, but also can generate various modulation signals, such as frequency shift amplitude modulation signal. In addition, as AWG has the advantages of generating continuous phase waveform, high stability of waveform quality, high frequency resolution, high bandwidth and so on, it is widely used in the areas of disk drive test, serial data communication, baseband/IF modulation test, simulations of Anti-lock Brake System (ABS), engine control, frequency converter and biological medicine.
In U.S. Pat. No. 8,166,283 B2, which is granted on Apr. 24, 2012, an arbitrary waveform generator based on instruction architecture is put forward with the title of generator of a signal with an adjustable waveform. The AWG does not distinguish between instructions and waveform data. The instructions and waveform data of the AWG are stored in the same storage address, i.e. coupled. And the feature of instruction's addressable operation is not exploited in the AWG Thus, the AWG can only be applied to simple wave's synthesis, and not suitable for the efficient synthesis and generation of the complex sequence wave.
The present invention aims to overcome the deficiencies of the prior art and provides an arbitrary waveform generator based on instruction architecture to synthesize and generate a complex sequence wave rapidly and efficiently.
To achieve these objectives, in accordance with the present invention, an arbitrary waveform generator based on instruction architecture is provided, comprising:
a host computer for generating a corresponding waveform synthesis instruction based on the waveform characteristics input by user;
a synthesis device for performing waveform synthesis according to the waveform synthesis instruction generated by the host computer, and outputting a complex sequence wave;
wherein the synthesis device comprises an instruction set based waveform synthesis controller (hereinafter referred as waveform synthesis controller), a memory, a storage control module, a DMA control module, a FIFO module, an output control module, a digital-analog conversion module and an output conditioning module;
the waveform synthesis instruction generated by the host computer is sent to the synthesis device, and received by the waveform synthesis controller; after receiving the waveform synthesis instruction, the waveform synthesis controller parses the waveform synthesis instruction into a trigger control command and a DMA command, and the trigger control command is sent to the output control module, the DMA command is sent to the DMA control module;
the DMA control module receives and parses the DMA command to get a waveform data read control command, and sends the waveform data read control command to the storage control module; the storage control module addresses in the memory according to the waveform data read control command, and transfers the waveform data of the corresponding segment address, i.e. segment waveform data to the FIFO module through the DMA control module; the segment waveform data is buffered by the FIFO module, then sent to the output control module;
according to the inputted trigger signal and the trigger control command, the output control module completes the trigger function of the waveform data generation, and sends the segment waveform data to the digital-analog conversion module continuously; the digital-analog conversion module converts the segment waveform data into an analog signal, and then the analog signal is conditioned, i.e. filtered, amplified or attenuated through the output conditioning module to obtain the complex sequence wave, thus the waveform synthesis is completed.
The objectives of the present invention are realized as follows:
To deal with the feature that the instructions and waveform data of the AWG are coupled in the prior art, an instruction set based waveform synthesis controller is employed, and substitutes for the sequence wave generator in the present invention, i.e. an arbitrary waveform generator based on instruction architecture. Thus the time-sharing scheduling in reading the waveform synthesis instruction and the segment waveform data is realized, and the complexity of the hardware is reduced, so that the AWG in present invention can synthesize and generate a complex sequence wave rapidly and efficiently.
The above and other objectives, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the similar modules are designated by similar reference numerals although they are illustrated in different drawings. Also, in the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.
In one embodiment, as shown in
As shown in
The synthesis device 2 performs waveform synthesis according to the received waveform synthesis instruction, and outputs a complex sequence wave. The synthesis device 2 comprises an instruction set based waveform synthesis controller 201 (hereinafter referred by waveform synthesis controller), a memory 202, a storage control module 203, a DMA control module 204, a FIFO module 205, an output control module 206, a digital-analog conversion module 207. an output conditioning module 208 and a on chip bus 209.
As shown in
As shown in
According to the inputted trigger signal and the trigger control command, the output control module 206 completes the trigger function of the waveform data generation, and sends the segment waveform data to the digital-analog conversion module 207 continuously. The digital-analog conversion module 207 converts the segment waveform data into an analog signal, and then the analog signal is conditioned, i.e. filtered, amplified or attenuated through the output conditioning module 208 to obtain the complex sequence wave, thus the waveform synthesis is completed.
In one embodiment, as shown in
The instruction address generator 2013 generates an instruction address of the next waveform synthesis instruction for the instruction buffer 2011, executing the waveform synthesis instruction in sequence, or in jump according to the flow control command; the data address generator 2014 generates a DMA command according to the segment waveform control command sent by the instruction parser 2012, and sends the DMA command to the DMA control module 204, thus the reading control of a segment waveform data is completed.
As shown in
The flow control command comprises an instruction's jump address, a repetition counter number and a jump number; when the waveform synthesis instruction is a jump instruction, the instruction parser 202 parses the jump instruction and obtains an flow control command, the flow control command is sent to the instruction address generator 2013; the instruction address generator 2013 judges according to flow control command, if the repetition counter number in the flow control command is 0, the jump is an unconditional jump, the instruction counter is assigned the jump instruction address; if the repetition counter number is 1, the jump is a conditional jump, the store value of the repetition number counter 1 is increased by 1, then the store value of the repetition number counter 1 is compared with the jump number for further judgment: if the store value of the repetition number counter 1 is less than the jump number, the instruction counter is assigned the instruction's jump address, i.e. jumps to the instruction's jump address which the flow control command designates, if the store value of the repetition number counter 1 equals to the jump number, the instruction counter in the instruction address generator 2013 is increased by 1, i.e. the next waveform synthesis instruction is fetched from the instruction buffer in sequence, meanwhile, the count value of repetition number counter 1 is reset to 0.
In the process of implementing the present invention, the number of the repetition counters can increase according to the complexity of the outputted complex sequence wave, i.e. the instruction address generator 2013 may comprise a plurality of repetition counters, which are readable and writable registers for counting more complex sequence wave and realizing the waveform sequence's nested call in complex sequence wave.
In one embodiment, the instruction format of a jump instruction is: JUMP InstructionAddress K N, which is used to realize an unconditional jump instruction or a conditional jump instruction, where JUMP is the operation code of the jump instruction. InstructionAddress, K, and N are operands, InstructionAddress is a instruction's jump address, K is a repetition counter number in the instruction address generator 2013, N is a jump number. When executing the jump instruction, the store value of the repetition number counter K is increased by 1, then the store value of the repetition number counter K is compared with the jump number, if the store value of the repetition number counter K is less than the jump number, the instruction counter is assigned the instruction's jump address InstructionAddress, and the waveform synthesis instruction is fetched out from the instruction buffer 2011 at the instruction's jump address InstructionAddress, if the store value of the repetition number counter 1 equals to the jump number N, the instruction counter of the instruction address generator 2013 is increased by 1, i.e. the next waveform synthesis instruction is fetched from the instruction buffer 2011 in sequence, meanwhile, the count value of repetition number counter K is reset to 0.
To realize unconditional jump and conditional jump in one jump instruction, when executing an unconditional jump instruction, the repetition counter number K is 0, the register to be operated is the repetition counter 0 of the instruction address generator 2013. The repetition counter 0 is a read-only register, when executing an unconditional jump instruction to add 1 to the register, i.e. the repetition counter 0, the store value of the repetition counter 0 is not changed, i.e. remains 0. Thus when comparing with the jump number, the store value of the repetition number counter 0 is always less than the jump number. Therefore, when executing an unconditional jump instruction, the instruction counter is assigned the instruction's jump address InstructionAddress to realize an unconditional jump. When executing a conditional jump instruction, the repetition number counter K is 1 to P, and all repetition counter numbers are readable and writable registers, the store value of the repetition number counter K is increased by 1, then the store value of the repetition number counter K is compared with the jump number N, if the store value of the repetition number counter K is less than the jump number, the instruction counter is assigned the instruction's jump address InstructionAddress, and the waveform synthesis instruction is fetched out from the instruction buffer 2011 at the instruction's jump address InstructionAddress; if the store value of the repetition number counter K equals to the jump number N, the instruction counter of the instruction address generator 2013 is increased by 1, i.e. the next waveform synthesis instruction is fetched out from the instruction buffer 2011 in sequence, meanwhile, the count value of repetition number counter K is reset to 0. The conditional jump instruction takes that whether the store value of the repetition number counter K is less than the jump number as a jump judgment to realize the conditional jump.
In one embodiment, as shown in
In one embodiment, as shown in
In one embodiment accordance with the present invention, the waveform synthesis instruction's instruction set of the arbitrary waveform generator based on instruction architecture comprise segment waveform synthesis instructions and jump instructions, where the instruction format of a segment waveform synthesis instruction is:
SEGMENT DataAddress Length M F
The segment waveform synthesis instruction is used to generate a segment waveform M times, SEGMENT is the operation code to identify the segment waveform synthesis instruction, DataAddress, Length, M and F are operands, where DataAddress is the start address of the segment waveform, Length is the length of the segment waveform, M is the repetitions of the segment waveform, and F is the segment waveform trigger flag; when the segment waveform trigger flag F is 0, it indicates that the output of the output control module does not need to wait the inputted trigger signal; when the segment waveform triggers the flag F is 1, it indicates that the output of the output control module needs to wait inputted trigger signal.
The instruction format of the jump instruction is:
JUMP InstructionAddress K N
The jump instruction is used to realize an unconditional jump instruction or a conditional jump instruction, where JUMP is the operation code of the jump instruction, InstructionAddress, K, and N are operands, instructionAddress is a instruction's jump address, K is a repetition counter number in the instruction address generator 2013, N is a jump number; When executing the jump instruction, if K is not equal to 0, the jump instruction is conditional jump instruction, the store value of the repetition number counter K is increased by 1, then the store value of the repetition number counter K is compared with the jump number, if the store value of the repetition number counter K is less than the jump number, the instruction counter is assigned the instruction's jump address InstructionAddress, and the waveform synthesis instruction is fetched out from the instruction buffer 2011 at the instruction's jump address InstructionAddress; if the store value of the repetition number counter K equals to the jump number N, the instruction counter of the instruction address generator 2013 is increased by 1, i.e. the next waveform synthesis instruction is fetched out from the instruction buffer 2011 in sequence. Meanwhile, the count value of repetition number counter K is reset to 0. If K is equal to 0, the jump instruction is unconditional jump instruction, the store value of the repetition counter 0 is 0, the store value of the repetition number counter 0 is less than the jump number N, the instruction counter is assigned the instruction's jump address InstructionAddress, and the waveform synthesis instruction is fetched out from the instruction buffer 2011 at the instruction's jump address InstructionAddress to realize an unconditional jump.
An Example of Implementation
a complex sequence wave F to be output indefinitely is synthesized in the example, the complex sequence wave F is comprised of an enhanced sequence wave Z and an enhanced sequence wave Y, the enhanced sequence wave Z is repeated twice, the enhanced sequence wave Y is repeated three times.
Where the enhanced sequence wave Z is comprised of a sequence wave A, which will be output two times, and a sequence wave B, which will be output three times; Where the sequence wave A is comprised of a segment waveform a, which will be output three times, and a segment waveform b, which will be output one time, meanwhile, the segment waveform b isn't output, until the inputted trigger signal arrives; the sequence wave B is comprised of a segment waveform c, which will be output four times, and a segment waveform d, which will be output one time. The start address of segment waveform a is DataAddress1, the length of segment waveform a is 1000, the start address of segment waveform b is DataAddress2, the length of segment waveform b is 2000, the start address of segment waveform c is DataAddress3, the length of segment waveform c is 500, the start address of segment waveform d is DataAddress4, the length of segment waveform d is 5000.
Where the enhanced sequence wave Y is comprised of a sequence wave C, which will be output two times, and a sequence wave C, which will be output three times; Where the sequence wave C is comprised of a segment waveform e, which will be output three times, and a segment waveform f, which will be output four times; The sequence wave D is comprised of a segment waveform h, which will be output five times, and a segment waveform i, which will be output two times. The start address of segment waveform e is DataAddress5, the length of segment waveform e is 1000, the start address of segment waveform f is DataAddress6, the length of segment waveform f is 2000, the start address of segment waveform h is DataAddress7, the length of segment waveform h is 500, the start address of segment waveform i is DataAddress8, the length of segment waveform i is 5000.
In the example, the waveform synthesis instructions to generate (output) the complex sequence wave F are as follows:
While illustrative embodiments of the invention have been described above, it is, of course, understand that various modifications will be apparent to those of ordinary skill in the art. Such modifications are within the spirit and scope of the invention, which is limited and defined only by the appended claims.
Number | Date | Country | Kind |
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2017 1 0671156 | Aug 2017 | CN | national |
Number | Name | Date | Kind |
---|---|---|---|
4222108 | Braaten | Sep 1980 | A |
4649783 | Strong | Mar 1987 | A |
4956798 | Dinteman | Sep 1990 | A |
6040515 | Mukojima | Mar 2000 | A |
RE37367 | Wachi | Sep 2001 | E |
6535772 | Miyamori | Mar 2003 | B1 |
8166283 | Cauchy | Apr 2012 | B2 |
8565811 | Tan | Oct 2013 | B2 |
Number | Date | Country | |
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20180032099 A1 | Feb 2018 | US |