Device and method for generating sine wave

Abstract

The invention provides a device and method for generating a sine wave. The device comprises a phase accumulation module, a value searching module, an interpolation module, a random bit cutting module and a sine wave generating module. The phase accumulation module is used for obtaining configuration information of the sine wave and generates address information of the sine wave according to the configuration information, wherein the address information comprises integer address information and decimal fraction address information, the value searching module is used for searching for first data information and second data information of the sine wave according to the integer address information, the interpolation module is used for conducting interpolation between the first data information and the second data information according to the decimal fraction address information and obtains interpolation original data information of the sine wave according to the decimal fraction address information, the random bit cutting module is used for conducting bit cutting processing on the interpolation original data according to the bit width of the decimal fraction address information and pseudorandom sequence output values to obtain the final interpolation data information of the sine wave, and the sine wave generating module is used for generating image information of the sine wave. According to the device, a digital circuit with the smaller area is utilized, and the sine wave with the richer and more accurate frequency can be generated.

Description

technical field [0001] The invention relates to the technical field of digital circuits, in particular to a sine wave generating device and method. Background technique [0002] At present, there are many methods for generating sine waves by digital circuits, for example, using MATLAB (Matrix Laboratory, Matrix Laboratory) or other software tools to generate sine waves. However, the current problem is that the data information of the sine wave is stored in the value lookup table. When MATLAB or other software tools generate the sine wave, the data in the value lookup table can be directly output according to the needs, and it is impossible to generate other than the value lookup table. The data information of the sine wave. Therefore, there are certain limitations in the existing methods. Some methods can only generate sine waves of specific frequencies, or some methods require a large circuit area when generating sine waves of different frequencies, and there are different...

AI Technical Summary

Problems solved by technology

However, the current problem is that the data information of the sine wave is stored in the value lookup table. When MATLAB or other software tools generate the sine wave, the data in the value lookup table can be directly output according to the needs, and it is impossible to generate other than the value lookup table. The data information of the sine wave

Therefore, there are certain limitations in the existing methods. Some methods can only generate sine waves of specific frequencies, or some methods require a large circuit area when generating sine waves of different frequencies, and there are different frequencies of sine waves. Accuracy and Drift Phenomena

Therefore, not only the power consumption and cost of the circuit resulting in the digital circuit generating the sine wave are high, but also the effect of the generated sine wave in the time domain and the frequency domain is not good

Images