0.3-V Voltage-Mode Versatile First-Order Analog Filter Using Multiple-Input DDTAs

• DOI: 10.3390/s23135945
• Publication Date: 2023-06-27T06:11:22Z
• Authors: Montree Kumngern; Fabian Khateb; Tomasz Kulej; Pavel Steffan
• Keywords: Electronic filter topology; Subthreshold conduction; Analogue filter; Operational transconductance amplifier; Transconductance; Current conveyor

This paper presents a versatile first-order analog filter using differential difference transconductance amplifiers (DDTAs). The DDTA employs the bulk-driven (BD) multiple-input MOS transistors technique (MI-MOST) operating in subthreshold region. results low-voltage and low-power operational capability. Therefore, DDTA, designed 130 nm CMOS technology from UMC Cadence environment, operates with 0.3 V consumes 357.4 nW. Unlike previous works, proposed provides transfer functions of low-pass, high-pass, all-pass filters within single topology. non-inverting, inverting, voltage gain are available for all filters. Furthermore, structure high-input low-output impedance, which is required voltage-mode circuits. pole frequency can be electronically controlled. total harmonic distortion low-pass was calculated as -39.97 dB an applied sine wave input signal 50 mVpp@ Hz. has been used to realize quadrature oscillator confirm advantages new structure.