Write a short note on Cascode Operational Amplifier

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written 7.0 years ago by

teamques10 ★ 69k

• modified 7.0 years ago

Cascode op-amp(Telescopic)

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i) In order to achieve a high gain-differential cascade topologies used.

ii) Above circuit display a gain of
$A_v=gm_n[(gm_n*r_{on}^2)||(gm_p*r_{op}^2)]$

iii) Configuration shown above are called "Telescopic cascade op-amp".

Fig:(a): Single ended output-suffers from a minor pole at 'X' -creates stability issues.

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