transistor voltage amplifier dc current

transistor voltage amplifier dc current

It can be seen from the circuit structure diagram of the common emitter amplification unit that when the circuit is working, there are both DC components and AC components. In order to facilitate analysis,
the DC component and the AC component are generally studied separately. Therefore, the amplifier circuit is divided into a DC path and an AC component. path. The so-called DC path is
the path through which the DC component flows under the action of the DC power supply Ec of the amplifier circuit when no input signal is added to the amplifier circuit.
    ①DC path. Since the capacitor can be regarded as an open circuit for DC voltage, the capacitor in the
voltage amplifier can be omitted when the collector voltage source is determined as DC voltage,