Input characteristics of the common-base, common-emitter, and common-collector bias configurations resemble the characteristics of a forward-biased diode .
output characteristics of the CE and the CC bias configurations are almost identical.
The Icao is the collector-to-base current with the emitter open, and the lam is the collector-to-emitter current with the base open.
The relation Ic Bla is valid only up to. not including, saturation. That is, 1 may increase beyond Ib(sat)min, but the collector current will not increase beyond Ic(sat).
The BJT amplifier may be biased in one of the three b configurations common- base, common-emitter, and common-collector. However, the common-emitter, which is the most widely used configuration, can be biased using several different methods base bias, emitter bias, and voltage divider bias.
The voltage divider bias is the most popular of all biasing methods because, if designed correctly, the circuit can be B-independent, and as a result, more stable.
The operating point, quiescent point, or simply the Q-point, is a point on the transistor collector characteristics that corresponds to certain input current, output current, and output voltage at which the transistor is biased to operate.
The DC load line is actually the plot of the output equation of the bias configuration, which extends from the saturation current Ic(sat) to the cutoff voltage Vcc, while passing through the Q-point.
When analyzing a DC bias configuration, there are always two loops or current paths to be considered for analysis: the input loop and the output loop: the input loop is the first to be analyzed.
The imput loop is the one that contains the forward biased base emitter junction and mot necessarily the loop that happens to be the left.