PERFORMANCE ENHANCEMENT OF BULK-DRIVEN QFG MOSFET LOW VOLTAGE CASCODE CURRENT MIRROR
DOI:
https://doi.org/10.55766/sujst7629Keywords:
Bulk-driven MOSFET, Cascode current mirror, Floating gate MOSFETAbstract
Bulk-driven (BD) and floating gate (FG) MOSFET are commonly used in applications where power consumption and voltage levels are relatively low due to their simplicity and efficiency. However, some drawbacks, such as reduced linearity and stability in the BD technique and reduction of transconductance in FG techniques, can be addressed by amalgamating both FG and BD techniques. This paper evaluates the performance of a bulk-driven quasi-floating gate (BDQFG) cascode current mirror circuit in comparison to a quasi-floating gate (QFG) and bulk-driven quasi-floating gate (BDQFG) current mirrors. The findings show that the BDQFG cascode current mirror offers an output resistance of 2.78 MΩ, input resistance of 3.71 kΩ with a bandwidth of 664.5 MHz and a current transfer ratio of 0.99. The bandwidth is further improved to 1.4 GHz and 1.93 GHz in subsequent modifications. The workability of the proposed circuits has been demonstrated using a ± 0.5 V power supply in a 130 nm CMOS technology. The design has been verified through simulation using PSpice
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