Key result
The folded cascode bulk driven OTA demonstrated lower power dissipation (620nW) compared to the two stage OTA (77.26uW), though with reduced DC gain (58.4dB vs 63.98dB).
This paper presents a comparative analysis of two stage and folded cascode bulk driven OTA topologies for biomedical applications.
May suit ultra-low-power biomedical sensors; leaves open gain adequacy for clinical translation.
This paper presence a comparative analysis of two stage and folded cascode bulk driven operational trans conductance amplifier (OTA) topologies for biomedical applications are presented. A two stage bulk driven OTA and Folded cascoded OTA operated with a 1Vpower supply. Bulkdriven PMOS-transistors as an input differential opamp provides high input common-mode range (CMR). To achieve low power consumption all transistors must be operated in sub threshold region. The test results are carried out in standard gpdk180nm CMOS technologies.
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A 2019 study studied this question. Folded cascode bulk driven OTA vs. Two stage bulk driven OTA was evaluated on Power dissipation and DC gain. The folded cascode bulk driven OTA demonstrated lower power dissipation (620nW) compared to the two stage OTA (77.26uW), though with reduced DC gain (58.4dB vs 63.98dB).
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