Application-specific integrated circuit with automatic time-constant matching

An application-specific integrated circuit, comprising:

• a first analog stage having a first filtering means capable of carrying out a filtering of the high-pass type on an input signal so as to deliver an intermediate signal, and a second digital stage having a second filtering means capable of introducing various first time constants depending on combinations of filtering coefficient values and arranged so as to correct any distortion potentially present in said intermediate signal, such that said first filtering means includes an assembly of electronic components capable of introducing various second time constants depending on their combination;
• generation means designed to supply a test input signal;
• selection means coupled to said electronic components and designed to set up a chosen combination of electronic components of said assembly and a combination of coefficient values defined by at least one command;
• and
• processing means configured for determining for said selection means at least one command capable of inducing a virtual equality between a third chosen time constant and said first and second time constants.