Accurate stability prediction of single-bit higher-order Δ-Σ modulators for Speech Codecs

Present approaches for predict of Delta-Sigma (Δ-Σ) modulators are mo DC inputs. This poses limitations as pract of Δ-Σ modulators involve a wide range than DC such as speech, audio and multip the case for synthetically generated spee any other signal, through the appropriat multiple sinusoids. In this paper, a quasi linear model that accurately predicts stability of single-loop 1-bit higher order (Δ-Σ) modulators for mulitple sinusoids is given. The results of this paper would enable optimization of the design of higher-order single-loop (Δ-Σ) modulators with increased dynamic ranges for various applications that deploy multiple sinusoidal inputs, as well as any general input signal constructed from multiple sinusoids