Complex sentence: In actuality, the quantization error (for quantizers defined as described here) is deterministically related to the signal rather than being independent of it, and in some cases it can even cause limit cycles to appear in digital signal processing systems.
Split into simpler sentences: In actuality, the quantization error (for quantizers defined as described here) is deterministically related to the signal rather than being independent of it. And in some cases it can even cause limit cycles to appear in digital signal processing systems.