Single-gate memory suitable for UHF RFID (Ultra High Frequency Radio Frequency Identification) passive tag chip

The invention discloses a single-gate nonvolatile memory suitable for a UHF RFID (Ultra High Frequency Radio Frequency Identification) passive tag chip, which mainly solves the problem that the current double-gate memory is incompatible with a CMOS (Complementary Metal Oxide Semiconductor) process. The memory consists of a plurality of completely identical memory units, each of which comprises an erasing transistor (110), a programming transistor (120), a decoding transistor (130) and a coupling transistor (140), wherein the source electrode and the drain electrode of the coupling transistor (140) are connected with a substrate to constitute a coupling terminal; the source electrode and the drain electrode of the erasing transistor (110) are connected with the substrate to constitute an erasing terminal; the source electrode of the programming transistor (120) is connected with the substrate to constitute a programming terminal; the source electrode of the decoding transistor (130) and the substrate are respe