Checking of the skew constancy of a bit flow
AssigneeSTMicroelectronics S.r.l.
InventorsPierre-Yvan Liardet, Yannick Teglia
Life of this patent
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Abstract
A method and a circuit for detecting a loss in the equiprobable character of a first output bit flow originating from at least one first element of normalization of an initial bit flow, including analyzing the flow rate of the normalization element.
Claims12
A circuit for generating a bit flow based on a noise source and on at least one first element for normalizing the initial bit flow provided by this noise source, comprising:
- at least one second normalization element of the same noise source, of a different flow rate than the first element;
- and
- an element for calculating the difference between the respective flow rates of the two normalization elements.
A method for detecting a loss in equiprobable character of a first output bit flow originating from at least one first element of normalization of an initial bit flow, said method comprising:
- submitting the initial flow to at least one second flow rate normalization element different from the first one;
- and
- checking constancy of a difference between respective output flow rates of the first and second normalization elements in a checking circuit and providing a signal indicative of the constancy of the difference between the respective output flow rates and thereby indicative of the equiprobable character of the first output flow.
A method for generating a bit flow, comprising:
- normalizing an input bit flow in a first normalization circuit to provide a first normalized bit flow at a first flow rate, the first normalized bit flow constituting an output bit flow;
- normalizing the input bit flow in a second normalization circuit different from the first normalization circuit to provide a second normalized bit flow at a second flow rate;
- checking constancy of a difference between the first flow rate and the second flow rate;
- and
- generating a valid signal if the constancy of the difference between the first flow rate and the second flow rate is acceptable.
A circuit for generating a bit flow, comprising:
- a first normalization circuit configured to normalize an input bit flow to provide a first normalized bit flow at a first flow rate, the first normalized bit flow constituting an output bit flow;
- a second normalization circuit different from the first normalization circuit, wherein the second normalization circuit is configured to provide a second normalized bit flow at a second flow rate ;
- and
- a checking circuit configured to check a constancy of a difference between the first flow rate and the second flow rate and to generate a valid signal if the constancy of the difference between the first flow rate and the second flow rate is acceptable.
Dependencies are inferred from the claim text.