Σ-Δ ADC无条件稳定理想OTA-C积分器

Unconditionally Stable and Ideal OTA-C Integrator for Σ-Δ ADC

提出了一种基于有源自举增益提升技术的近似理想的 OTA- C积分器电路 ,详细分析了有关原理、稳定条件、失真、失配等特性 ,该积分器无条件稳定工作于Σ-Δ ADC闭环系统中。以一阶 Σ- Δ ADC为例 ,进行了模拟验证 。

An unconditonally stable and nearly ideal OTA C integrator for Σ Δ analog to digital converter is presented,which also features low voltage application The principle of active bootstrapped gain enhancement technique and stable conditions, distortion, mismatch effect of the integrator are analyzed in detail As an example, a first order Σ Δ analog to digital converter based on OTA C is simulated