lec2----low Frequencty Response

# lec2----low Frequencty Response - BW=HL Product GB=AMBW /V...

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The extent of the mid-band is defined by the frequencies  ω L  and  ω H  – The frequencies at which the gain drops by  3 dB  below the value at mid-band.  BW =  ω H  -  ω L   The figure of merit of amplifier is Gain-bandwidth  Product GB= A M BW A M  is the magnitude of the mid-band gain in V/V.
Gain Function A(s)           A(s) = A M F L (s)F H (s) F L H frequency bands and are dependent on frequency    At mid-band, the gain approaches unity for    ω   L <<  ω  << ω H         A(s) = A M

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Gain Function A(s) : Mid-band gain is determined by analyzing amplifier equivalent circuit with the assumption Coupling and bypass capacitors are acting as a perfect short circuit Internal capacitors of the amplifier are acting as a perfect open circuit The low frequency function F L (s) is determined by analyzing amplifier equivalent circuit Including Coupling and bypass capacitor but assuming Internal capacitors of the amplifier as a perfect open circuit The High frequency function F H (s) is determined by analyzing amplifier equivalent circuit
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## This note was uploaded on 10/18/2011 for the course ELECTRICAL 12 taught by Professor Mamamia during the Spring '10 term at College of E&ME, NUST.

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lec2----low Frequencty Response - BW=HL Product GB=AMBW /V...

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