DC Parametric Measurement Unit using Differential Difference Amplifier with a Full Operation Range
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In this paper, a new DC PMU (parametric measurement unit) using DDA (differential difference amplifier) with dynamic common-mode voltage (DCMV) technique and new connection structure is proposed to overcome the structural limitations of prior PMU composed of differential difference amplifier. And the proposed PMU was implemented with 0.18um CMOS process. Since the proposed DC PMU has simple structure and there is no additional amplifier in the negative feedback loop, the system stability is guaranteed. It is confirmed that the operating range of the forcing voltage mode is 0.25~1.55V, the operating range of the forcing current mode is -20~20mA, and these forcing modes have maximum errors of 1.28% and 1.43%, respectively.
Abstract
In this paper, a new DC PMU (parametric measurement unit) using DDA (differential difference amplifier) with dynamic common-mode voltage (DCMV) technique and new connection structure is proposed to overcome the structural limitations of prior PMU composed of differential difference amplifier. And the proposed PMU was implemented with 0.18um CMOS process. Since the proposed DC PMU has simple structure and there is no additional amplifier in the negative feedback loop, the system stability is guaranteed. It is confirmed that the operating range of the forcing voltage mode is 0.25~1.55V, the operating range of the forcing current mode is -20~20mA, and these forcing modes have maximum errors of 1.28% and 1.43%, respectively.