ddt test 3 with RC

V1 1 0 dc 0 pulse 0 2 1u 1n 1n 100u 200u
R1 1 2 1k
C1 2 0 1u

B2 22 0 v = ddt(V(2))/1000

.tran 100n 3m

.control
run
plot v(2) v(22)
*print v(22)
.endc

.end