Luis Fernando Martínez Pantoja, A. Díaz-Sánchez, J. M. Rocha-Pérez
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引用次数: 1
Abstract
This paper presents a new architecture for a pseudo-resistor (PR) implemented with MOS transistors, working in subthreshold region, tunable from Mega $\Omega$ to Giga $\Omega$ range. The proposed PR is programmed by controlling the $V_{GS}$ of the MOS transistors with a differential pair. An ultra-low frequency bandpass filter which uses the proposed PR with adjustable highpass cut-off frequency for a tuning range of 0.28 Hz to 900 Hz was designed. The simulated total harmonic distortion is $ for an input voltage of $\mathbf{224}\ mV_{pp}$ . Simulations were performed using HSPICE Analog Design Environment and ON-SEMI 0.5 $\mu \mathbf{m}$ technology parameters which validates the feasibility of the proposed circuit.
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