- #1
b-rett
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Can someone clarify the overall purpose and implications of biasing a BJT Class A amplifier? I just can't get my head wrapped around the entire purpose.
As far as I know, biasing the circuit will place it in a certain operating region, but I don't know the limits/implications of doing this.
Example from book: "Consider the operation of the emitter follower circuit for sine-wave input. Neglecting V_CEsat we see that if the bias current I is properly selected, the output voltage can swing from -V_CC to +V_CC with the quiescent value being zero."
What constitues a "properly selected" bias current I and why does this gave way to the output being able to swing between -V_CC and +V_CC?
As far as I know, biasing the circuit will place it in a certain operating region, but I don't know the limits/implications of doing this.
Example from book: "Consider the operation of the emitter follower circuit for sine-wave input. Neglecting V_CEsat we see that if the bias current I is properly selected, the output voltage can swing from -V_CC to +V_CC with the quiescent value being zero."
What constitues a "properly selected" bias current I and why does this gave way to the output being able to swing between -V_CC and +V_CC?