walters said:General design rules:
R1 and R2 are the base bias resistors, setting the bias point.
R3 is the collector load resistor.
R4 is the emitter stabilising resistor.
C3 is the emitter decoupling capacitor.
C1 and C2 are coupling capacitors which allow ac signals to pass but block dc.
1.) But how do u get the "values" for the resistors/capacitors?
2.) (a sine wave at the input and look at the ac responce, and voltages in the trasient domain) What am i looking for in the Transient domain?
walters said:What does the feedback resistor do?
Does the feedback resistor change the bias? or symmetry?
(Germanium forward bias is .3 volts and silicon forward bias is .7 volts)
Is it true that forward bias is based on saturation?
Ans:- Certainly not
Whats the difference between .3volts forward bias VS .7volts forward bias?
Ans:- Difference is because of material i.e. germanium and silicon repectively
whats the difference in saturation or other criteria?
I still don't understand how these designers get these component values
and they would know what voltages they need
walters said:Yes But What is the standard DC biasing operating voltagesfor the base,collector,emitter? what are the rules for these?
The emitter Resistance value changes the GAIN the most right?
What are the guide lines for operating voltages for the base,collector,emitter?
what are the voltage ranges?
walters said:ya i know that so the AC waveform doesn't Clip
but still the resistor values for base,emitter,collector change alot from circuit to circuit
(Germanium forward bias is .3 volts and silicon forward bias is .7 volts)
Is it true that forward bias is based on distortion saturation?
Whats the difference between .3volts forward bias VS .7volts forward bias?
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