The proposed filter offers ability of the electronic control of its order by changing values of transconductances
gm together with current gains B.
of VDTA were controlled by bias currents.
of the transistors are controlled by both [V.
It has little impact on the source-drain voltage of tail transistors and the transconductances
of the cross-coupled transistors, and so does the amplitude of the output signal.
Because MOS transistors need high bias currents to obtain good transconductances
, this is the configuration selected to implement the oscillator, expecting a reduction in the power consumption for a same phase noise value, compared with other architectures.
Under small presence of parasitic resistances and transconductances
, the dispersion relationship becomes complex: [k'.
25 [[micro]meter] channel CMOS devices with transconductances
of 240 ms/mm for the nFET and 140 ms/mm for the pFET are currently under development.
Fixing this degree of freedom, we have to select correct positions in admittance matrix where specific transconductances
Both types of devices have very high transconductances
, from a median value of 1270 to 1580 mS/mm.
m]--two different transconductances
are used for independent FO and CO control [g.
of the controlled sources are set to unity, and the coefficients of the nonlinear conductance are those of the nonlinear controlled source to be simulated.
Current Differencing Buffered Amplifier (CDBA) and Current Differencing Transconductance
Amplifier (CDTA) use the differential input currents, whereas Voltage Differencing Transconductance
Amplifier (VDTA), Voltage Differencing Current Conveyor (VDCC) and Voltage Differencing Buffered Amplifier (VDBA) employ differential input voltages -.