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Current mode logic (CML), or source-coupled logic (SCL), is a digital design style used both for logic gates and for board-level digital signaling of digital data.. The basic principle of CML is that current from a constant current generator is steered between two alternate paths depending on whether a logic zero or logic one is being represented.
To achieve better performance in the same area or the same performance in a smaller area, multiplier designs may use higher order compressors such as 7:3 compressors; [8] [7] implement the compressors in faster logic (such transmission gate logic, pass transistor logic, domino logic); [13] connect the compressors in a different pattern; or some ...
An XNOR gate is a basic comparator, because its output is "1" only if its two input bits are equal. The analog equivalent of digital comparator is the voltage comparator . Many microcontrollers have analog comparators on some of their inputs that can be read or trigger an interrupt .
8-bit comparator, inverting output 20 SN74ALS521: 74x522 1 8-bit comparator, inverting output 20 kΩ pull-up open-collector 20 SN74ALS522: 74x524 1 8-bit registered comparator open-collector 20 74F524: 74x525 1 16-bit programmable counter 28 74F525: 74x526 1 fuse programmable identity comparator, 16-bit 20 SN74ALS526: 74x527 1
The following 4-to-1 multiplexer is constructed from 3-state buffers and AND gates (the AND gates are acting as the decoder): A 4:1 MUX circuit using 3 input AND and other gates The subscripts on the I n {\displaystyle I_{n}} inputs indicate the decimal value of the binary control inputs at which that input is let through.
In most cases a comparator is implemented using a dedicated comparator IC, but op-amps may be used as an alternative. Comparator diagrams and op-amp diagrams use the same symbols. A simple comparator circuit made using an op-amp without feedback simply heavily amplifies the voltage difference between Vin and VREF and outputs the result as Vout.
Several important complexity measures can be defined on Boolean circuits, including circuit depth, circuit size, and the number of alternations between AND gates and OR gates. For example, the size complexity of a Boolean circuit is the number of gates in the circuit. There is a natural connection between circuit size complexity and time ...
A 4-bit ripple-carry adder–subtractor based on a 4-bit adder that performs two's complement on A when D = 1 to yield S = B − A. Having an n-bit adder for A and B, then S = A + B. Then, assume the numbers are in two's complement. Then to perform B − A, two's complement theory says to invert each bit of A with a NOT gate then add one.