IC based jednostavni generatori funkcija

[mikikg]

<blockquote class="ipsBlockquote" data-author="ivanlukic" data-cid="19866" data-time="1391334691">
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<p>Ne znam čemu služi ovaj tranzistor (ne bi mogao da bude neki "nested feedback" jer tranconductance pojačavač <span style="color:#ff0000;">ne koristi negativnu povratnu spregu</span>) ...</p>
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<p><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">The&nbsp;</span><b>operational transconductance amplifier</b><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">&nbsp;(</span><b>OTA</b><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">) is an&nbsp;</span><a data-ipb='nomediaparse' href='http://en.wikipedia.org/wiki/Amplifier' title="Amplifier">amplifier</a><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">&nbsp;whose differential input voltage produces an output&nbsp;</span><a data-ipb='nomediaparse' href='http://en.wikipedia.org/wiki/Electric_current' title="Electric current">current</a><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">. Thus, it is a voltage controlled current source (VCCS). There is usually an additional input for a current to control the amplifier's&nbsp;</span><a data-ipb='nomediaparse' href='http://en.wikipedia.org/wiki/Transconductance' title="Transconductance">transconductance</a><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">. The OTA is similar to a standard&nbsp;</span><a data-ipb='nomediaparse' href='http://en.wikipedia.org/wiki/Operational_amplifier' title="Operational amplifier">operational amplifier</a><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">&nbsp;in that it has a high&nbsp;</span><a data-ipb='nomediaparse' href='http://en.wikipedia.org/wiki/Electrical_impedance' title="Electrical impedance">impedance</a><span style="color:rgb(0,0,0);font-familyans-serif;font-size:13px;">&nbsp;differential input stage</span><strong><span style="color:#0000ff;"><span style="font-familyans-serif;font-size:13px;"> and that it may be used with&nbsp;</span></span><a data-ipb='nomediaparse' href='http://en.wikipedia.org/wiki/Negative_feedback' title="Negative feedback"><span style="color:#0000ff;">negative feedback</span></a><span style="color:#0000ff;"><span style="font-familyans-serif;font-size:13px;">.</span></span>^{<a data-ipb='nomediaparse' href='http://en.wikipedia.org/wiki/Operational_transconductance_amplifier#cite_note-1'><span style="color:#0000ff;">[1]</span></a>}</strong></p>