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AssigneeMotorola, Inc.
InventorsHarold G. Nash, John R. Linford
Estimating the term…
A method and an apparatus are disclosed which employ digital techniques to approximate a multiplication of an analog signal by a sine wave of an appropriate frequency for detecting the analog signal. The analog signal is converted to a digital representation which includes a binary sign bit and a plurality of binary magnitude bits. The sign bit of the digital representation is selectively complemented by an inverting logic gate which operates under the control of a square wave having the appropriate frequency of the sine wave which is being approximated. The selective complementation of the sign bit of the digital representation functions to multiply the digital representation by +1 or -1 as determined by the status of the square wave signal. The resulting digital representation is latched at periodic intervals for further processing of the detected signal which results from the quasi digital multiplication.
A quasi digital multiplier for approximating multiplication of an analog waveform by a sine wave signal of a predetermined frequency, comprising:
A method of multiplying an analog signal to provide signal detection, comprising the steps of:
Dependencies are inferred from the claim text.