From 6a86853dc5965b5cd06537a2e05ba38980071051 Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Fri, 20 Aug 2021 09:20:33 +0200
Subject: Corrections

---
 tex/lti.tex | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'tex/lti.tex')

diff --git a/tex/lti.tex b/tex/lti.tex
index 812c1d4..2e1819a 100644
--- a/tex/lti.tex
+++ b/tex/lti.tex
@@ -67,17 +67,17 @@ The spectrum of a sinusoidal signal of frequency \(\omega_1\) is only one weight
 
 To measure the distortion of a signal in the English literature there is the \emph{total harmonic distortion} (THD) defined as
 \[
-  \text{THD} = \frac{1}{d_1}\sqrt{\sum_{i=1}^n d_i^2}.
+  \text{THD} = \frac{1}{d_1}\sqrt{\sum_{i=2}^n d_i^2}.
 \]
 In the German literature there is the distortion factor (\emph{Klirrfaktor}, always between 0 and 1)
 \[
-  k = \sqrt{\frac{d_2 + d_3 + \cdots + d_n}{d_1 + d_2 + \cdots + d_n}}.
+	k = \sqrt{\frac{d^2_2 + d^2_3 + \cdots + d^2_n}{d^2_1 + d^2_2 + \cdots + d^2_n}}.
 \]
 Both are usually given in percent (\%) and are related with
 \[
   (\text{THD})^2 = \frac{k^2}{1-k^2},
 \]
-thus THD \(\leq k\).
+thus THD \(\geq k\).
 
 \subsection{Stochastic inputs}
 
-- 
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