FIG. 4: Bias dependence of DC current I$_{d}$ (squares), RF current noise S$_{I}$ (triangles) and RF transconductance g$_{m}$ (circles) at the transconductance maximum ( V$_{g}$ ∼ +0 . 5 V). 11 -600 0 0 5 0 50  I$_{d}$  S$_{I}$/2e  g$_{m}$ RF  g m RF  ( µ S ) $_{I}$d, S I / 2e ( µ A) V$_{d}$ (mV) V$_{g}$ = + 0.5 V