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US 4,070,631 AGranted
Digital noise blanking circuit
AssigneeMotorola, Inc.
InventorsHarold Garth Nash, Jack Whitmore
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Abstract
A digital noise blanking circuit for use in generating a single output pulse in response to a noisy signal which may include clusters of noise-induced pulses, the circuit utilizing a digital counter which is operated for a preset period of time longer than the time during which noise-induced transitional pulses may occur.
Claims2
A digital noise blanking circuit for converting a noisy time domain input signal into a series of transitional pulses comprising:
- a. first means for converting the zero axis crossings of the noisy input signal into clusters of transitional pulses,
- b. second means for generating a single transitional pulse for each of the clusters of transitional pulses,
- c. said second means including:
- 1. logic circuit means;
- and
- 2. N-stage counter means coupled to said logic circuit means for generating a single transitional pulse in response to each cluster of transitional pulses.
3 more elements
Dependencies are inferred from the claim text.