diff --git a/src/discrete_blocks.jl b/src/discrete_blocks.jl
index d764eb8..cf4ae09 100644
--- a/src/discrete_blocks.jl
+++ b/src/discrete_blocks.jl
@@ -194,6 +194,9 @@ end
 Internal function. This function seeds the seed parameter as well as the current simulation time.
 """
 function seeded_randn(seed, t)
+    if rand() < 0.1
+        @show t
+    end
     rng = StableRNGs.StableRNG(hash(t, hash(seed)))
     randn(rng)
 end
@@ -1010,7 +1013,7 @@ end
 """
     ExponentialFilter(a = 0.1)
 
-Exponential filtering (first-order filter) with input-output relation ``y(z) ~ (1 - a) y(z-1) + a u(z-1)``, transfer function
+Exponential filtering (first-order filter) with input-output relation ``y(z) = (1 - a) y(z-1) + a u(z-1)``, transfer function
 ```math
 Y(z) = \\dfrac{a}{1 - (1 - a) z^{-1}} U(z)
 ```
@@ -1042,7 +1045,7 @@ end
 """
     MovingAverageFilter(N = 3)
 
-Exponential filtering with input-output relation ``y(z) ~ sum(u(z-i) for i in 0:N-1) / N``.
+Exponential filtering with input-output relation ``y(z) = sum(u(z-i) for i in 0:N-1) / N``.
 
 Please note: this implementation of a moving average filter is not optimized for very large number of filter taps `N`.