CMOS NOR Gate Circuit

CMOS NOR Gate Circuit: Fig. 3.4 shows 2-input CMOS NOR Gate Circuit. Here, P-channel MOSFETs Q1 and Q2 are connected in series and N-channel MOSFETs Q3 and Q4 are connected in parallel. Like NAND circuit, this circuit can be analyzed by realizing that a LOW at any input turns ON its corresponding P-channel MOSFET and turns OFF …

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Half Subtractor and Full Subtractor Circuit

Half Subtractor and Full Subtractor Circuit: Subtractor are divided into two categories namely, half subtractor and full subtractor circuit. Half Subtractor Circuit: The Half Subtractor Circuit consists of four possible elementary operations, namely, In all operations, each subtrahend bit is subtracted from the minuend bit. In case of second operation the minuend bit is smaller …

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Control Signals of 8085

Control Signals of 8085: The 8085 Microprocessor provides RD and WR signals to initiate read or write cycle. Because these Control Signals of 8085 are used both for reading/writing memory and for reading/writing an input device, it is necessary to generate separate read and write signals for memory and I/O devices. The 8085 provides IO/M …

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Latching Circuit

Latching Circuit: We know that AD0 to AD7 lines are multiplexed and the lower half of address (A0 – A7) is available only during T1 of the machine cycle. This lower half of address is also necessary during T2 and T3 of machine cycle to access specific location in memory or I/O port. This means …

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Routh Criterion

Routh Criterion: Routh Criterion – The locations of the poles gives us an idea about stability of the active network. Consider the denominator polynomial To get a stable system, all the roots must have negative real parts. There should not be any positive or zero real parts. This condition is not sufficient. Let us consider …

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