Differential to single-ended converter

An integrated circuit comprising:

• at least one converter for a differential input signal into a single-ended output signal and comprising
• an output node on which the single-ended output signal is generated,
• a differential pair of first and second transistors driven by the differential input signal, said first and second transistors having first conduction terminals coupled together and second conduction terminals not coupled together,
• a filter coupled between the second conduction terminal of said second transistor and said output node,
• third and fourth transistors coupled in series with said first and second transistors respectively,
• a fifth transistor coupled to define a current mirror with said third and fourth transistors,
• a current generator biasing said fifth transistor, and
• respective degeneration resistors for said third, fourth and fifth transistors of said current mirror and dimensioned such that gains for each branch of the differential signal are equal and of opposite sign.

A converter for a differential input signal into a single-ended output signal and comprising:

• an output node on which the single-ended output signal is generated;
• a differential pair of first and second transistors coupled in an emitter follower configuration and driven by the differential input signal, said first and second transistors having first conduction terminals coupled together and second conduction terminals not coupled together;
• a filter coupled between the second conduction terminal of said second transistor and said output node;
• third and fourth transistors coupled in series with said first and second transistors respectively;
• a fifth transistor coupled to define a current mirror with said third and fourth transistors;
• a current generator biasing said fifth transistor;
• and
• respective degeneration resistors for said third, fourth and fifth transistors of said current mirror and dimensioned such that gains for each branch of the differential signal are equal and of opposite sign.

A method for making a converter for a differential input signal into a single-ended output signal and comprising:

• forming a differential pair of first and second transistors driven by the differential input signal, the first and second transistors having first conduction terminals coupled together and second conduction terminals not coupled together;
• coupling a filter between the second conduction terminal of the second transistor and the output node;
• coupling third and fourth transistors in series with the first and second transistors respectively;
• coupling a fifth transistor to define a current mirror with the third and fourth transistors;
• biasing the fifth transistor using a current generator;
• and
• forming respective degeneration resistors for the third, fourth and fifth transistors of the current mirror and dimensioned such that gains for each branch of the differential signal are equal and of opposite sign.