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Old 04-30-2012, 04:55 PM
theertham theertham is offline
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in a collector to base bias circuit using pnp BC 558 , what happened if a capacitor of 10pF connected across base and collector ? Rb=1M, Rc= 4.7k, Vcc=9V.
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Old 04-30-2012, 05:01 PM
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The highest frequency of amplification will change.

Where are you getting these questions?
Is this homework?
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Old 04-30-2012, 05:37 PM
theertham theertham is offline
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this is part of my project.. two stage amplification includes RC coupled amplifier and collector to base bias circuit.. in the collector to base bias circuit , 10 pF capacitor is connected and the output from collector is given to a divide by 10 counter as clock. thats why iam asking the advantage of 10pF capacitor. here frequency will be 40kHz
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Old 04-30-2012, 08:01 PM
Audioguru Audioguru is offline
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Your transistor is not biased properly so it probably won't work in your circuit.
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