When an output is tapped from the point between the P-MOS and N-MOS transistors, this output will either be directly connected to VDD (the P-MOS transistor pulls the output to high) or directly connected to ground (the N-MOS transistor pulls the output to low). The P-MOS transistors are typically connected to the positive power rail (VDD), and the N-MOS transistors are connected to ground (GND). This ensures that both transistors are never switched on at the same time. In this configuration, any signal will turn on a transistor of one type and off a transistor of the other type. A pair of complementary P-MOS and N-MOS transistors is connected to the same input signal. Similarly, all N-MOS transistors must either be connected to ground or to another N-MOS transistor. All P-MOS transistors must either be connected to the positive power rail or to another P-MOS transistor. This is one of the main reasons integrated circuits using this technology remain cooler, and therefore offer more potential to be used in high-performance systems with large transistor densities.ĬMOS logic accomplishes this reduction in power consumption by using complementary pairs of P-MOS and N-MOS transistors. A small current is required only for the circuitry to perform switching between states. With the design of more complex integrated circuits and the increasing packing density of transistors, overheating soon became a major concern for designers.ĬMOS logic reduces power consumption because no current flows as long as the transistors are not actively switching. For that reason, those technologies use a lot of power to operate which also generates heat. Many other logic families rely on currents to flow, even if the logic circuits are kept in a fixed state without actively switching their outputs. In CMOS logic, P-channel (P-MOS) and N-channel (N-MOS) MOSFETs are used as transistors. The term CMOS stands for Complementary Metal Oxide Semiconductor. CMOS is one of the most popular technologies in the microchip industry and is widely used in today’s integrated circuits.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |