All About PNP Transistors July 21, 2024 by Al Williams 21 Comments In the early days, PNP bipolar transistors were common, but the bulk of circuits you see today use NPN transistors.

The voltage on the emitter of the PNP transistor in this oscillator circuit is a good sawtooth (but do not load it much as it is at a high impedance). Also, the current out at the emitter of the NPN ...

The transistors used (a 2N3055 npn and 2N2955 pnp in TO-220 packages) are reasonably good choices. They should be placed on a heat sink for good heat dissipation.

CNT-based PTL circuits. A popular and widely used alternative to the conventional CMOS logic configuration is the PTL configuration, which can significantly reduce the number of transistors ...