CFA- Direct Gain in frequency response

Q.  What does an arrow indicate in the frequency response schematic shown below?
- Published on 24 Sep 15
Frequency


a. Direct gain
b. Closed-loop gain
c. Open-loop gain
d. None of the above

ANSWER: Direct gain

Related Content

 

    Discussion

  • Satyawati Patil   -Posted on 09 Oct 15
    CFAs exhibit the characteristics of high speed & bandwidth in addition to low input impedance. Generally, Current feedback amplifier retains its high gain at very high frequencies while voltage feedback amplifier loses gain at high frequencies.

    One of the characteristic feature of CFA is that it offers better distortion performance. But, the rate of decrease in gain is equal for VFA as well as CFA. It looks worse for CFA due to compact frequency scale.

    Like VFAs, CFAs do not have an open-loop gain that decreases at very low frequencies with the decrease rate of about -20 dB/decade of frequency.

    Since CFA does not have open-loop gain & the closed loop gain is already shown in the schematic of frequency response, the interrogatory arrow represents the direct gain.

➨ Post your comment / Share knowledge


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)
▲