بِسْــــــــــــــــمِ اﷲِالرَّحْمَنِ اارَّحِيم
bismillaahirrahmaanirrahiim
السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللهِ وَبَرَكَاتُهُ
Assalamu'alaikum warahmatullahi wabarakatuh
*Frequency Response of an Op-amp
�An open-loop op-amp has a constant gain Ao only at low frequencies, and a continuously reducing gain at higher frequencies due to internal device and circuit inherent limits.�
�For a single dominant pole at freq fp, the frequency-dependent gain A(jw) can be written as
� A(jw) = Ao/[1 + jw/wp] = Ao/[1 + jf/ fp]where wp= 2pfp
�the gain rolls off at 20dB/decade for frequencies above fp, as shown below
�An op-amp may have additional higher frequency poles, as well, but is often described over a large frequency range by the dominant pole (as assumed in the figure Above)
�The unity gain frequency fois defined as the frequency where the gain = 1
�For the single dominant pole situation assumed in the figure below, focan be found by extrapolating the 20 dB/decade roll-off to the point where the gain is unity.
CONTINUE READING �
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Artikel Frequency Response of an Opamp - Operational Amplifiers Types Tutorials Series, Diterbitkan oleh scodeaplikasi pada Sabtu, 14 Februari 2015. Semoga artikel ini dapat menambah wawasan Anda. Website ini dipost dari beberapa sumber, bisa cek disini sumber, Sobat diperbolehkan mengcopy paste / menyebar luaskan artikel ini, karena segala yang dipost di public adalah milik public. Bila Sobat tertarik Ingin membuat software, membeli software,
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