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What does cascading of two transistor amplifiers imply? (a)Output of first stage sent to input of second stage

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What does cascading of two transistor amplifiers imply?

(a) Output of first stage sent to input of second stage

(b) Output of first stage sent to coupling device

(c) Input of first stage sent to input of second stage

(d) Not related

The question was posed to me in an online quiz.

My doubt is from High Frequency Response of Multistage Amplifiers topic in chapter Frequency Response of Electronic Devices & Circuits

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Right choice is (b) Output of first stage sent to coupling device

Easiest explanation: In multi – stage amplifiers, the output of first stage is coupled to the input of second stage using a coupling device. The coupling devices is typically a capacitor or a transformer. Cascading is known as the process of combining two amplifier stages using a coupling device.

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