Design of a New MISO Mixed-Mode Universal Bi-quad OTA-C Filter in 130nm CMOS Technology

Goran Popadic, Jelena Radic

Abstract


This paper presents the design of a MISO (multiple-input single-output) universal biquad filter in 130nm CMOS UMC technology. The proposed filter consists of three operational transconductance amplifiers (OTAs), two grounded capacitors and one inverter stage. The topology, which has three inputs and one output, operates in all modes: voltage, transconductance, current, and transresistance. In addition, the filter generates all types of transfer functions (LP, HP, BP, BS, and AP). First, the filter topology with an inverter at the output is designed and analyzed in detail. Next, an improved topology with a differential amplifier as the output stage is proposed. The designed filter has a cutoff frequency of approximately 250 MHz and a current consumption of 4.5 mA. The impact of process, temperature, and voltage variations is examined through corner analysis.

Keywords


universal biquad filter, operational transconductance amplifier, OTA-C filter, analog IC design

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References


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DOI: https://doi.org/10.33180/InfMIDEM2025.301

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