Read circuit and memory system

A read circuit configured to read data from a memory array including a plurality of bit lines, each of the bit lines being a line-shaped wiring section electrically connecting a plurality of memory cells, the read circuit comprising:

• a first amplification unit including a read line, the read line being a line-shaped wiring section electrically connected to a selected bit line among the plurality of bit lines, and configured to amplify an electric signal of the selected bit line at a voltage of a sense node on the read line corresponding to the selected bit line after charging the selected bit line via the read line during a read operation of data stored in a selected memory cell connected to the selected bit line;
• and
• a second amplification unit configured to output a determination signal that determines the data stored in the selected memory cell connected to the selected bit line and selected during the read operation based on the voltage of the sense node corresponding to the selected bit line, wherein
• the first amplification unit includes a first switching element that is electrically connected between the selected bit line and the read line and is configured to be switched between an ON state and an OFF state in response to the electric signal of the selected bit line, and a second switching element that is configured to switch a connection between the read line and a first power supply or a second power supply,
• the second switching element is configured to charge the selected bit line using power supplied from the first power supply having a first voltage,
• the first switching element is configured to be switched between the ON state and the OFF state in response to power supplied from the second power supply having a second voltage higher than the first voltage, and
• the read circuit further comprises
• a switching circuit configured to switch a connection between a power supply line connected to the first amplification unit, and the first power supply and the second power supply.