From 3b5b86900d7a62df92005fab594010239ee63b8e Mon Sep 17 00:00:00 2001 From: Arjan te Marvelde Date: Sun, 2 Jan 2022 11:06:45 +0100 Subject: [PATCH] Update README.md --- README.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/README.md b/README.md index 131ebc0..e83fa65 100644 --- a/README.md +++ b/README.md @@ -13,7 +13,7 @@ Above image shows 1MHz square waves on both output channels. It must be noted th ![Proto-schematic](doc/Proto-schematic.gif) - +The OpAmp used in this circuit must be a high-speed type, so it does not interfere too much with the waveform. I have used the AD811, which is really a video driver and it goes up to more than 100MHz. The non-inverting case is used here to maximize the input impedance. A slight disadvantage is that it needs to to be supplied with more than +/-5V, in order to fit the whole output range. # Copyright notice