Title :
High-frequency nonlinearity analysis of common-emitter and differential-pair transconductance stages
Author :
Fong, Keng Leong ; Meyer, Robert G.
Author_Institution :
Electron. Res. Lab., California Univ., Berkeley, CA, USA
fDate :
4/1/1998 12:00:00 AM
Abstract :
Equations describing the high-frequency nonlinear behavior of common-emitter and differential-pair transconductance stages are derived. The equations show that transconductance stages using inductive degeneration are more linear than those using capacitive or resistive degeneration, and that the common-emitter transconductance stages are more linear than the differential-pair transconductance stages with the same bias current and transconductance. The nonlinearity equations can also be used to explain the class AB behavior of the common-emitter transconductance stage with inductive degeneration
Keywords :
Volterra series; bipolar analogue integrated circuits; circuit optimisation; differential amplifiers; electric distortion; bias current; class AB behavior; common-emitter transconductance stages; differential-pair transconductance stages; high-frequency nonlinearity analysis; inductive degeneration; Circuits; Differential equations; Impedance; Linearity; Noise figure; Nonlinear distortion; Nonlinear equations; Radio frequency; Resistors; Transconductance;
Journal_Title :
Solid-State Circuits, IEEE Journal of
