Design of a linear transconductor considering effects of weak inversion region and mobility degradation

Abstract

A local feedback transconductor is known as a linear transconductor. However, the linearity is deteriorated because of mobility degradation and operating in weak inversion region. In this paper, a new linear MOS transconductor based on a local feedback transconductor is proposed. The proposed circuit employs a square current source circuit and MOSFETs operating in triode region. Simulation results show that the proposed technique is effective for improvement of the linearity of the transconductor.