| 摘要 |
<p>PURPOSE:To stabilize a write current by providing a depletion transistor (TR) whose gate and source are connected in a write circuit supplying a write current from a write DC power supply to a prescribed memory cell in response to write data. CONSTITUTION:A depletion TR 57 whose gate and source are connected in common is provided in a write circuit supplying a write current from a write DC power supply Vpp to a prescribed cell via a prescribed transfer gate TR. Thus, based on the constant current characteristic provided in the TR 57, the load characteristic of the write circuit (the load characteristic specified by TRs 56, 57 and a transfer gate TR (e.g., Tso) selected in this case) is formed as a flat characteristic within the range of drain-source voltage at data writing.</p> |
