Method and device for generating an output signal as a...

Details Method and device for generating an output signal as a... Method and device for generating an output signal as a...

2007-06-19

2007-06-19

Ngo, Chuong D. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

10321829

ABSTRACT:
A device (1) for generating a digital output signal yLOG(k)/K) as a mathematical function of a digital input signal (xLOG(k)) includes a level-changing device (6), which by amplifying or attenuating the input signal (xLOG(k)) generates a first intermediate signal (A) that falls within a compressed argument range of the mathematical function and a correction signal (shiftLOG) dependent on the amplification or attenuation of the input signal (xLOG(k)). Tabulated function values of the mathematical function are stored at or between indices in a storage device (11). The tabulated function values (B1) are read from the storage device (11) in dependence on the first intermediate signal (A), and a second intermediate signal (B) is generated in dependence on the read tabulated function values (B1). The correction signal (shiftLOG) is subtracted from the second intermediate signal (B) in a subtractor (12) to yield the digital output signal yLOG(k)/K).

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