Design of a High-Gain Amplifier Using Negative-Resistance-Assisted Technique

Abstract

This paper proposes an impedance‑splitting, negative‑resistance‑assisted architecture to improve feedback amplifier performance by implementing a negative resistance at the feedback nodes. This technique cancels non-ideal virtual ground (△V_VGND), thereby increasing the effective loop gain. Simulations show a low‑frequency gain increase of 43.6 dB and at least 39.8 dB improvements in both power-supply rejection ratio (PSRR) and common-mode rejection ratio (CMRR).