Biomedical Engineering Reference
In-Depth Information
-
1
Pulse
+
X
1
s
+
-
-Step
Agonist PS
1/Tde
Deactivation Time Constant
Clock
1/Tac
Activation Time Constant
Switch
FIGURE A.14
A low-pass filter with a time-varying time constant.
Routing” library as shown in Figure A.14. The “clock” block is used to monitor the simula-
tion time. At the start of the simulation, the time constant t
ac
is used. When the simulation
time is greater than
t
1
, threshold is reached and the switch changes to the time constant t
de
.
The remainder of the blocks in Figure A.13 solves for
.
For information on the other operations in SIMULINK, the reader is encouraged to con-
sult the help menu.
F
ag
