The same transconductor
output current is sourced into the IA output stage, thus determining a voltage drop on R2.
Soliman, "New 1.5-V CMOS second generation current conveyor based on wide range transconductor
", Analog Integrated Circuits and Signal Processing, vol.
proposed a 60-GHz transconductor
consisting of a CS transistor whose DC current is shared by other two transistors .
At node (a) of Figure 2, for a positive half cycle of LO signal, [M.sub.3] is switched off while [M.sub.1] is switched on, resulting in the transconductor
to be switched on.
The model is formed by the parallel connection of an LC tank, whose losses are represented by an equivalent resistance R, a nonlinear two-terminal transconductor
described by the current-voltage relationship [i.sub.nl](v), and a controlled current source described by the current-voltage relationship [i.sub.in](v, [v.sub.in]), where v denotes the differential voltage between the drain nodes of the ILFD.
Leuciuc, "A linear MOS transconductor
using source degeneration and adaptive biasing", IEEE Trans.
Section II presents a literature review regarding linearized transconductor
cores and their employment in programmable analog processing.
Nam, "A linearization technique for a transconductor
using vertical bipolar junction transistors in a CMOS process," IEEE Transactions on Microwave Theory and Techniques, vol.
[M.sub.3] and [M.sub.4] represent the class-A transconductor
Li, "Improved cross-coupled quad transconductor
cell", Microelectronics Journal, vol.
Up to now, there have been lots of methods proposed to enhance the linearity of the mixer due to the nonlinear of the transconductor