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Broadband arbitrary waveform generation device and method based on CML interface

An arbitrary waveform and generator technology, applied in the field of broadband arbitrary waveform generators, can solve problems such as difficult circuit design, loss of DC level, and reduced reliability, and achieve easy implementation, elimination of common mode levels, and increased data bandwidth. Effect

Pending Publication Date: 2021-11-26
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The broadband output interface will have a common mode level. Conventional solutions use capacitors to block DC, which will lose the DC level, or use complex bias control circuits to move the positive and negative power rails. The circuit design is difficult, costly, and reduces reliability.

Method used

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  • Broadband arbitrary waveform generation device and method based on CML interface
  • Broadband arbitrary waveform generation device and method based on CML interface
  • Broadband arbitrary waveform generation device and method based on CML interface

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Embodiment Construction

[0059] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0060] The wideband arbitrary waveform generator based on the CML interface mainly includes an extraction module, a subtraction module, a CML interface module, a DAC chip, a median filter module, a DC ADC module and an analog channel, wherein the CML interface module includes an XOR module and an N-channel pseudo-random sequence Generate modules and timers. principle such as figure 1 shown. The extraction module is used to sequentially extract the waveform data into N branches. The subtractor block is used to subtract the offset factor and waveform data. The CML interface module is used to transmit N-way waveform data of FPGA to DAC chip. XOR module is used for pseudo-random sequence and waveform data XOR operation. The N-way pseudo-random sequence generation module generates N-way pseudo-random sequences according to the bit error rate det...

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Abstract

The invention discloses a broadband arbitrary waveform generation device and method based on a CML interface, and belongs to the field of arbitrary waveform generation. According to the invention, a JESD204B interface is replaced by a mode of combining a CML interface with detection of a pseudo-random sequence bit error rate, the data bandwidth of the same channel number is improved by 20%, the channel number can be expanded, and the data bandwidth is further improved; a negative feedback loop is formed by adopting modes of common-mode level acquisition, median filtering, accumulation and subtraction operation, so that the common-mode level output by the DAC is effectively eliminated, the structure is simple, and the implementation is easy; the data bandwidth is effectively improved, arbitrary waveform signals with higher sampling rate can be generated, common-mode level is eliminated, and fidelity of the arbitrary waveform signals is improved.

Description

technical field [0001] The invention belongs to the field of arbitrary waveform generation, and in particular relates to a CML interface-based broadband arbitrary waveform generation device and method. Background technique [0002] Broadband arbitrary waveform generation technology is a signal generation technology based on digital, analog and computer technology, which is widely used in radar, satellite communication, electronic countermeasures, radio frequency testing, integrated circuit testing and other fields. The broadband arbitrary waveform generator based on this technology has the advantages of high output frequency stability and resolution, fast frequency switching speed, and continuous output waveform phase during switching. Its rich signal excitation capabilities include high-speed waveform generator, function generator generator, pulse / sequence generator, frequency sweep generator, trigger generator, broadband white noise signal generator and amplitude modulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/28
CPCG01R1/28
Inventor 逄锦昊吴恒奎刘宇朱卫国滕友伟
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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