Persistent volatile memory with sense amplifier and discharge switch

An integrated circuit, comprising:

• a persistent volatile memory cell, for memorizing a binary datum during a retention time independent from a supply voltage of the memory cell, the memory cell including:
• a capacitive memory point structured to supply a persistent voltage and comprising a leakage resistance for having a discharge time,
• a first switch structured to trigger charging of the memory point when a writing signal has an active value,
• a sense-amplifier circuit comprising an input coupled to receive the persistent voltage, the sense-amplifier circuit being structured to set a value of the binary datum according to a value of the persistent voltage, and
• a second switch structured to trigger discharging of the memory point when an erase signal has an active value, the second switch being structured to be driven by a feedback signal taken from the sense-amplifier circuit.

A contactless integrated circuit, comprising:

• an antenna circuit structured to supply alternating signals when the integrated circuit is in presence of an activation field;
• a supply circuit structure to generate a continuous voltage from the alternating signals supplied by the antenna circuit;
• and
• a persistent volatile memory cell to memorize a flag during a retention time even if the continuous voltage disappears, the memory cell including:
• a capacitive memory point structured to supply a persistent voltage and comprising a leakage resistance for having a discharge time,
• a first switch structured to trigger charging of the memory point when a writing signal has an active value,
• a sense-amplifier circuit comprising an input coupled to receive the persistent voltage, the sense-amplifier circuit being structured to set a value of the binary datum according to a value of the persistent voltage, and
• a second switch structured to trigger discharging of the memory point when an erase signal has an active value, the second switch being structured to be driven by a feedback signal taken from the sense-amplifier circuit.