Online proceedings - EDA Publishing Association

11-13 May 2011, Aix-en-Provence, France
V
x
= nx
Fx
(2)
i n x
x
= (3)
n x is the piezoelectric conversion factor, V x , the resonator
excitation voltage and i x , the motional current.
C 0 is the inter-electrode capacitance formed by the
electrodes with quartz as dielectric. Finally, the output current
in the resonator is:
i
tot
x
dVx
= C 0
+ nx
x
(4)
dt
+
V +
VerilogA OUT
-
Rf
V −
V
Fig. 4. transconductance amplifier
The resonator block in Verilog-A is built with equations (1),
(2), (3) and (4). They give the physical description. The code
is:
module resonator(a,b);
input a; output b;
electrical a,b;
kinematic Z,Fx;
kinematic_v Vc;
parameter real k=1,4e3 from [0:inf);
parameter real m=1e-8 from [0:inf);
parameter real ρ=3,1e-7 from [0:inf);
parameter real n=2,8e-3 from [0:inf);
analog
begin
Vel(Vc)