The cut-off frequencies f β and f α are 0.707 times the frequency when β drops to low frequency
The parameters of a transistor can be divided into DC parameters,
The maximum allowable dissipation power P (CM) of the collector electrode.
The above two parameters respectively indicate the amplification ability of the transistor for DC current and AC current
The transistor is one of the most common devices in electronic circuits.
To determine the quality of a transistor, simply check if each PN junction of the transistor is damaged,
