====== Operační zesilovače ======
===== Unity gain, audio, asymetrical supply =====
{{http://www.beavisaudio.com/techpages/Buffers/Buffer_OrmanOpamp.gif}}

===== 3 band tone correction audio equalizer =====
{{http://i13.photobucket.com/albums/a300/mr_sevs/practicemaneq.gif}}