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US 5,966,034 AGranted
Method and device for the filtering of a pulse signal
AssigneeSTMicroelectronics S.r.l.
InventorJean-Francois Leon
Life of this patent
Estimating the term…
Abstract
In a pulse filtering device, the pulse signal is sampled to enable the counting of this signal by an asynchronous counter. A pulse of calibrated duration is generated when the counting reaches a predetermined number.
Claims19
A device for filtering a pulse input signal comprising:
- a sampling circuit having an input receiving the pulse input signal, and having an output for delivering a sampled signal based upon the pulse input signal;
- an asynchronous counter receiving the sampled signal as a clock signal;
- a detection circuit for providing a detection signal when contents of said asynchronous counter are greater than or equal to a predetermined number;
- and
- a transmitting circuit for transmitting a calibrated pulse responsive to the detection signal.
2 more elements
A device for filtering a pulse input signal comprising:
- a sampling circuit having an input receiving the pulse input signal, and having an output for delivering a sampled signal based upon the pulse input signal and a clock signal;
- an asynchronous counter receiving the sampled signal as a clock signal;
- a detection circuit for providing a detection signal when contents of said asynchronous counter are greater than or equal to a predetermined number;
- and
- a transmitting circuit for transmitting a calibrated pulse responsive to the detection signal, said transmitting circuit comprising a synchronous counter having a reset input responsive to a trailing edge of a reset pulse.
2 more elements
A method for filtering an input pulse signal comprising the steps of:
- sampling the pulse input signal based upon a clock signal;
- counting a number of clock pulses occurring during sampling of the pulse input signal;
- generating a detection signal when the number of counted clock pulses is greater than or equal to a predetermined number;
- and
- transmitting a calibrated pulse responsive to the detection signal when the number of counted clock pulses is greater than or equal to the predetermined number.
2 more elements
Dependencies are inferred from the claim text.