Sum Modulation Signal Generator

Abstract

The invention relates to a summation modulating signal generator and a summation modulating signal generating method. The summation modulating signal generator comprises a carrier phase accumulator, a carrier storer, a modulating wave phase accumulator, a modulating wave storer and a summation modulating device, wherein the carrier phase accumulator is used for accumulating carrier frequency control words with the frequency of a master clock so as to obtain a phase code, the carrier storer takes the phase code as the read of address of the carrier storer so as to read carrier signals in the carrier storer corresponding to the shape of the carrier, the modulating wave phase accumulator is used for accumulating modulating frequency control words with the frequency of the master clock so as to generate a read enable signal after overflow by accumulating, the modulating wave storer reads the modulating wave signal corresponding to the shape of the modulating wave under the control of the read enable signal, the summation modulating device processes the amplitude of the carrier signal with a carrier proportionality coefficient, processes the amplitude of the modulating wave signal with a modulating wave proportionality coefficient, and then carries out addition of waveforms on the processed carrier signal and the modulating wave signal.

Description

technical field [0001] The invention relates to the technical field of signal generators, in particular to a sum modulation (SUM Modulation) signal generator. Background technique [0002] Function arbitrary waveform generator, which can generate certain periodic time function waveforms (sine wave, square wave, triangle wave, sawtooth wave and pulse wave) signals, and can also generate arbitrary waveforms; except for communication, instrumentation and automatic control systems In addition to testing, it is also widely used in other non-electrical measurement fields. With the development of electronic technology, the function arbitrary waveform generator is required to be able to generate rich modulation signals, such as common digital modulation signals and analog modulation signals. In the R&D and debugging process of communication equipment and instruments, it is also required that the function arbitrary waveform generator can output a waveform that simulates the actual w...

AI Technical Summary

Problems solved by technology

However, there is currently no mature technical disclosure for summation modulation

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