fixed-point arithmetic

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fixed-point arithmetic

[¦fikst ‚pȯint ə′rith·mə·tik]
(computer science)
A method of calculation in which the computer does not consider the location of the decimal or radix point because the point is given a fixed position.
A type of arithmetic in which the operands and results of all arithmetic operations must be properly scaled so as to have a magnitude between certain fixed values.
References in periodicals archive ?
The change from implementing a control algorithm in floating-point to fixed-point math can take a great amount of time, and overflows and underflows inherent in fixed-point operations can wreak havoc with control loops.
A customer in Europe had a PID loop that we converted to fixed-point math in about 10 minutes.
The fixed-point math requires programmers to pay significant attention to the number of coefficients used in each algorithm when multiplying and accumulating digital data to prevent distortion caused by register overflow and a decrease of the signal-to-noise ratio caused by truncation noise.
Our Blocksets support high-precision fixed-point math and a floating-point override simulation mode so developers don't get bogged down with quantization, underflow and overflow as they start to create algorithms rithms.
In some cases, even double-precision fixed-point math may suffice.

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