Question

negative feedback is employed in collector - feedback bias.
select one:
○ true
○ false

Explanation:

Collector - feedback bias uses negative feedback. In collector - feedback bias, a portion of the output voltage (from the collector) is fed back to the input (base). When the collector current \(I_C\) increases (due to an increase in temperature or \(β\) of the transistor), the collector - emitter voltage \(V_{CE}\) decreases (since \(V_{CE}=V_{CC}-I_C R_C\)). This decrease in \(V_{CE}\) is fed back to the base - emitter junction. A decrease in \(V_{CE}\) (which is in series with the base - emitter circuit) reduces the base current \(I_B\) (because \(V_{BE}=V_{CE}-I_B R_{B}\) (approximate, assuming \(V_{CC}\) is fixed)). A reduction in \(I_B\) then reduces \(I_C\) (since \(I_C = βI_B\)), counteracting the initial increase in \(I_C\). This is the principle of negative feedback (output change is fed back to input to oppose the change).

Answer:

True