Flash chip and reading method thereof

[0016] In order to make the technical purpose, technical solutions and technical effects of the present invention clearer and facilitate those skilled in the art to understand and implement the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like figure 1 shown, figure 1 A circuit diagram of a read circuit is shown. The working principle of the read circuit is as follows: the inverting input terminal of the comparator A is connected to the reference current branch 20, and the non-inverting input terminal of the comparator A is connected to the memory cell branch 10; if the memory cell is a programming memory cell (pgm cell), it is turned on The voltage (VTH) is high, and there is no current in the memory cell at this time, and the voltage of the non-inverting input terminal of comparator A is higher than the voltage of the inverting input terminal of comparator A; if