Oscillating circuit with giant magnetoresistance effect junctions

An oscillating circuit, comprising:

• first and second groups of n elementary junctions, wherein:
• n is an integer greater than or equal to 1,
• each of the elementary junctions has a giant magnetoresistance effect,
• the elementary junctions of each of the two groups are in series,
• each of the two groups of n elementary junctions is traversed by a respective main current, and the voltages across terminals of the two groups are added together to provide a voltage on an output of the oscillating circuit,
• a voltage across the terminals of one or more elementary junctions of the first group is applied to a first input of a phase comparator,
• a voltage across the terminals of one or more elementary junctions of the second group is applied to a second, different input of the phase comparator,
• the phase comparator is configured to provide secondary currents of the same amplitude and opposite signs on two outputs of the phase comparator, where the amplitude depends on a mean phase difference between the voltages applied to the first and second inputs of the phase comparator, and
• the secondary currents are each added to a respective main current.