- Joined Mar 19, 2022
So what is the point of current amplification(hfe)?hi D,
The Collector Current refers to the actual current flowing into the Transistors Collector path to Emitter and 0V.
The current flowing in the Collector resistor will be the same as the Collector current if there is no output loading.
If the transistor drives an external as shown in your diagram, the Collector does not source the current into the external load, the current in the collector resistor is the sum of the actual Collector current and the external load current.
Do you follow, OK.?
The sentence "When the impedance of RE||C2 decreases....." could be misinterpreted having the given expression (see post#17) for the gain (-RL/RE) in mind.The circuit diagram shown below is your classic common emitter amplifier.
Without C2 the AC gain is -RL/RE independent of frequency.
RE introduces negative feedback. When the impedance of RE//C2 decreases, negative feedback decreases also.
Since the impedance of C2 is a function of frequency, the AC gain becomes a function of AC frequency.
|Thread starter||Similar threads||Forum||Replies||Date|
|S||Dual supply H-Bridge driver using transistors wouldn't work||General Electronics Chat||9|
|Wouldn't it be safer to pass neutral and live wire though switches?||General Electronics Chat||13|
|If the rule of thumb is "wait 3tau" wouldn't this mean the magnet is taking longer to discharge if the time we need to wait is 4.61tau||Homework Help||8|
|Boeing 737 MAX - software wouldn't fix faulty airframe||Software & IDEs||408|
|C||MATLAB Code that computes TL input impedance wouldn't produce the plot I want||Homework Help||1|
|Dual supply H-Bridge driver using transistors wouldn't work|
|Wouldn't it be safer to pass neutral and live wire though switches?|
|If the rule of thumb is "wait 3tau" wouldn't this mean the magnet is taking longer to discharge if the time we need to wait is 4.61tau|
|Boeing 737 MAX - software wouldn't fix faulty airframe|
|MATLAB Code that computes TL input impedance wouldn't produce the plot I want|