Common base transistor amplifier unit circuit b

Common base transistor amplifier unit circuit b

The basic structure of the common-base amplifier circuit is shown in the figure. The key components are mainly bias resistors , coupling capacitors and amplifier
transistors. The four resistors in the circuit are all set up to establish a static operating point. Rc also serves as a load resistor for the collector (c)
; the resistor RL is a load resistor ; the two capacitors cl and C2 are The coupling capacitor serves to communicate AC and isolate DC; the decoupling
capacitor Cb is to directly ground the AC of the base (b) and serves as a decoupling capacitor, that is, to eliminate AC negative feedback.
    The input signal is loaded between the emitter (e) and the base (b) of the transistor, and the output signal is taken
between the collector (c) and the base (b) of the transistor. It can be seen that the base (b ) is the common terminal of the input signal and the output signal, therefore, the circuit is called a common-base transistor
amplifier.