2. Device and Circuit Structures
SOI current mirror and CMOS amplifier circuits shown
in Figs. 1 and 2, respectively, are studied in this work. In
Fig. 1, separation of 2 silicon islands d is varied to study
effects of thermal coupling in the mirror. In Fig. 2, the
differential pair, MP1 and MP2, is built on the same island
sharing the source. MN1 and MN2, as the active current
sink load, are built on another island sharing the source.
MP3 is used to provide the bias current for the amplifier.
Fig. 1 (a) SOI current mirror circuit and (b) its layout. d is
the FOX separation between M1 and M2. If two devices are
on the same island, d = 0.
Fig. 2 (a) CMOS SOI differential amplifier circuit and (b)
its layout. VDD = 2.5V, VSS = -2.5V, VBIAS = 1V and Vin2 = 0.
The terminal temperatures in (b) are used in the simulation.
In the SOI devices, gate length Lg = 0.22