Differential amplifier with gain substantially independent of temperature

A differential amplifier comprising:

• a differential input branch for receiving an input signal with differential and common mode input signal components, the input branch providing a first output signal with common mode and differential mode components generated with respect to a voltage plane;
• a differential output branch receiving the first output signal and providing a second output signal with differential and common mode output signal components, the output branch converting the common mode component of the first output signal to the common mode component of the second output signal with reference to the same voltage plane as the input branch;
• and an active load circuit linking the input branch to the output branch,
• the differential amplifier being adapted to set a relationship between the magnitude of the common mode component of the second output signal with respect to the magnitude of the common mode component of the input signal to the input branch so that the magnitude of the common mode component of the second output signal intrinsically follows the magnitude of the common mode component of the input signal as a common mode follower without using a common mode feedback regulation circuit for regulating the common mode component of the second output signal.