Question
Download Solution PDFWhich of the following types of amplifiers will NOT have a lower cut-off frequency?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
The frequency response of the Direct-coupled amplifier is as shown:
- Lower frequency does not exist because the DC-amplifier circuit does not use coupling or bypass capacitors. So it’s gain does not affect at low frequency.
- Lower frequency gain is the same as mid-frequency gain
Important Points
- In other amplifiers like RC-coupled amplifier, Transformer coupled amplifier and Impedance-coupled amplifier coupling, and bypass capacitor and transformer is used.
- So it affects the gain of the amplifier at low frequencies as well as at high frequencies.
- So in all the above amplifier, lower and higher cut-off frequency exist in frequency response.
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