Proposed is the design of a CMOS highly-linear differential cross-coupled compensator transconductor that combines both cross-quad and cascomp linearisation techniques with enhanced tunability. The proposed cross-coupled compensator linearises the total drain current while maintaining a high input voltage swing range. It achieves a wide tunable gm" nulling over 500mV differential input signal and a tunable 50 increase in gm flatness. The proposed linearised transconductor achieves a measured 20dB IM3 distortion reduction after linearisation. The linearised transconductor enhanced tunability technique achieves IM3 better than -78dBc at 1GHz at an optimum bias condition with ease and precision without reducing the linear signal handling capability, thus improving the overall transconductor dynamic range performance.

Additional Metadata
Persistent URL dx.doi.org/10.1049/el.2010.2332
Journal Electronics Letters
Citation
El-Khatib, Z., MacEachern, L, & Mahmoud, S.A. (2010). Highly-linear CMOS cross-coupled compensator transconductor with enhanced tunability. Electronics Letters, 46(24), 1597–1598. doi:10.1049/el.2010.2332