| 摘要 |
PURPOSE:To convert a voltage VCC type decoder selection signal to a VPP type (write-in type) signal securely and speedily and expand a VCC margin by installing a voltage conversion circuit between an AND circuit and a selection circuit. CONSTITUTION:When a fi' input is an earth electric potential an inversion fi' input is an SW (read-out) electric potential, transistors (TR) 31 and 32 are respectively off and TR33 is on, an electric potential of a word line is pulled down to the earth electric potential and the word line is in the non-selection condition. By installing a voltage conversion circuit 21 between a NAND circuit 20 and a selection circuit 22, influences are removed which substrate bias effects of an NCH enhancement type TR give, a margin of circuit pattern design is broad, high speed action can be executed and a VCC margin is wide. Such a circuit can be composed. |
