Signal conversion system and method
A signal conversion and signal converter technology, applied in the directions of analog conversion, code conversion, incremental modulation, etc., can solve problems such as converter output error, and achieve the effect of eliminating the influence
Inactive Publication Date: 2012-09-12
AOTU ELECTRONICS WUHAN
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Therefore, the output of this converter has a relatively severe error
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[0013] A detailed description will be given below of embodiments of the present invention. While the invention will be described in conjunction with examples, it will be understood that it is not intended to limit the invention to these examples. On the contrary, the invention is intended to cover various alternatives, modifications and equivalents as defined within the spirit and scope of the invention as defined by the appended claims.
[0014] Furthermore, in the following detailed description of the invention, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In some other instances, well-known schemes, processes, components and circuits are not described in detail in order to highlight the gist of the present invention.
[0015] The invention provides a signal conversion system. In on...
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The invention discloses a signal conversion system and method. The signal conversion system includes a compensation module and a conversion module coupled to the compensation module. The compensation module is operable for adjusting a first compensation signal according to a dynamic signal and adding the first compensation signal to a first input signal. The compensation module is also operable for subtracting a second compensation signal, indicative of an accumulation of the dynamic signal, from the output signal. The conversion module is operable for receiving a second input signal that is the sum of the first input signal and the first compensation signal, and converting the second input signal to the output signal. The dynamic signal comprises pseudo-random codes. The compensation module comprises an accumulator for accumulating a plurality of pseudo-random codes. When the accumulated result of the accumulator reaches a preset value, the compensation module generates a second compensation signal. By adopting the signal conversion system and method of the invention, the input signal of the signal conversion system is comparatively 'busy' to reduce the problem of the idle tone and the flat region, to generating output signal appropriately indicating the input signal.
Description
technical field [0001] The invention relates to a signal conversion system and method. Background technique [0002] Delta-sigma modulation (Sigma-Delta Modulation) is a method of encoding high-resolution signals into low-resolution signals by using noise shaping and error feedback. Utilizing these technologies, delta-sigma converters (such as analog / digital converters, digital / analog converters) can easily achieve high-resolution conversions using low-cost analog components. However, traditional delta-sigma converters have some problems such as idle tones and flat regions. For example, if the input signal to a conventional delta-sigma converter is a DC signal (eg, the input signal has a relatively constant value), the delta-sigma converter may generate pattern noise (eg, idle tones) that interferes with its output. Furthermore, if the input signal fluctuates within a relatively small range around a certain value, the output of the converter may be constant, ie, not change...
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IPC IPC(8): H03M3/02
CPCH03M3/44H03M3/43H03M3/332
Inventor 栗国星
Owner AOTU ELECTRONICS WUHAN