US 2026/0106606 A1Published application

Adaptive window comparator

OwnerJoerg GOLLER, Dominik GERLinventors

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Abstract

In some examples, a circuit includes a window comparator circuit. The window comparator circuit is configured to receive a input signal and a feedback signal, determine a delayed representation of the feedback signal based on a window control signal, determine, based on the feedback signal and the delayed representation of the feedback signal, a time window, responsive to a rising edge of the input signal occurring in the time window, or responsive to a falling edge of the input signal occurring in the time window, determine that the input signal and the feedback signal are locked, and responsive to the rising edge of the input signal occurring outside of the time window, or responsive to the falling edge of the input signal occurring outside of the time window, provide a pulse signal having an asserted value for a programmed period of time.

Claims20

Dependent claims

A circuit, comprising:

a window comparator circuit having first, second, and third input terminals, and first and second output terminals;
a counter having first and second input terminals and an output terminal, the first input terminal of the counter coupled to the first output terminal of the window comparator circuit, and the second input terminal of the counter coupled to the second output terminal of the window comparator circuit;
a current generator having an input terminal, a window control output terminal, and a plurality of delay output terminals, the input terminal of the current generator coupled to the output terminal of the counter, and the window control output terminal coupled to the third input terminal of the window comparator circuit;
and
a plurality of delay circuits coupled in series between the first input terminal of the window comparator circuit and the second input terminal of the window comparator circuit, each delay circuit having a delay control input terminal coupled to a respective one of the plurality of delay output terminals of the current generator.

2 more elements

A circuit, comprising:

a window comparator circuit configured to:
receive a input signal and a feedback signal;
determine a delayed representation of the feedback signal based on a window control signal;
determine, based on the feedback signal and the delayed representation of the feedback signal, a time window;
responsive to a rising edge of the input signal occurring in the time window, or responsive to a falling edge of the input signal occurring in the time window, determine that the input signal and the feedback signal are locked;
and
responsive to the rising edge of the input signal occurring outside of the time window, or responsive to the falling edge of the input signal occurring outside of the time window, provide a pulse signal having an asserted value for a programmed period of time.

4 more elements

Dependencies are inferred from the claim text.