diff --git a/docs/source/.ztr-directory b/docs/source/.ztr-directory
deleted file mode 100644
index f5acee9..0000000
--- a/docs/source/.ztr-directory
+++ /dev/null
@@ -1 +0,0 @@
-{"sorting":"name-up","project":null,"icon":null}
\ No newline at end of file
diff --git a/docs/source/input_impedance.png b/docs/source/input_impedance.png
index 4d53b43..be6403c 100644
--- a/docs/source/input_impedance.png
+++ b/docs/source/input_impedance.png
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diff --git a/docs/source/output_gain.png b/docs/source/output_gain.png
index 160e878..dca8942 100644
--- a/docs/source/output_gain.png
+++ b/docs/source/output_gain.png
Binary files differ
diff --git a/docs/source/tia_gain.png b/docs/source/tia_gain.png
index 6e8c477..b342d6d 100644
--- a/docs/source/tia_gain.png
+++ b/docs/source/tia_gain.png
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