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Buy Fundamental of Microprocessors and Microcontrollers eBook By B Ram PDF Enjoy the flexibility of reading on the go without having to carry your books. Badri Ram, D. N. Vishwakarma. Books 1. A.R. Van C. Warrignton, Protective Relays T.S.M. Rao, Power System Protection: Static Relays with Microprocessor. Complementary metal–oxide–semiconductor, abbreviated as 'CMOS', is a technology for constructing integrated circuits. CMOS technology is used in microprocessors, microcontrollers, static RAM, . If both of the A and B inputs are high, then both the NMOS transistors (bottom half of the diagram) will conduct, neither of the.
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The PMOS transistor's channel is in a low resistance state and much more current can flow from the supply to the output. Because the resistance between the supply voltage and Q is low, the voltage drop between the supply voltage and Q due to a current drawn from Q is small.
The output, therefore, registers a high voltage.
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On the other hand, when the voltage of input A is high, the PMOS transistor is in an OFF high resistance state so it would limit the current flowing from the positive supply to the output, while the NMOS transistor is in an ON low resistance state, allowing the output from microprocessor book by b ram to ground.
Because the resistance between Q and ground is low, the voltage drop due to microprocessor book by b ram current drawn into Q placing Q above ground is small. This low drop results in the output registering a low voltage. In short, the outputs of the PMOS and NMOS transistors are complementary such that when the input is low, the output is high, and when the input is high, the output is low.
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Because of this behavior of input and output, the CMOS circuit's output is the inverse of the input. Power supply pins[ microprocessor book by b ram ] See also: A CMOS circuit is created to allow a path always to exist from the output to either the power source or ground.
To accomplish this, the set of all paths to the voltage source must be the complement of the set of all paths to ground.
This can be easily accomplished by defining one in terms of the NOT of the other. When a path consists of two transistors in series, both transistors must have low resistance to the corresponding supply voltage, modelling an AND.
When a path consists of two transistors in parallel, either one or both of the microprocessor book by b ram must have low resistance to connect the supply voltage to the output, modelling an OR.
If both of the A and B inputs are high, then both the NMOS transistors bottom half of the diagram will conduct, neither of the PMOS transistors top half will conduct, and a conductive path will be established between the output and Vss groundbringing the output low.
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If both of the A and B inputs are low, then neither of the NMOS transistors will conduct, while both of the PMOS transistors will conduct, establishing a conductive path between the output and Vdd voltage sourcebringing the output high.
Microprocessor book by b ram either of the A or B inputs is low, one of the NMOS transistors will not conduct, one of the PMOS transistors will, microprocessor book by b ram a conductive path will be established between the output and Vdd voltage sourcebringing the output high.
In addition, the output signal swings the full voltage between the low and high rails. This strong, more nearly symmetric response also makes CMOS more resistant to noise.
Fundamentals of Microprocessors and Microcontrollers by B.
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Microprocessors and microcontrollers are being extensively used in the field of instrumentation and control. Fundamentals of Microprocessors and Microcomputers by B Ram. In and Microcontroller title: Microprocessors and Microcontrollers Hardware and Interfacing.