VOLTAGE SUPPLY CONTROL CIRCUIT,申请号KR19990066236-传众专利搜索

VOLTAGE SUPPLY CONTROL CIRCUIT

申请公布号：KR20010058864(A)

申请号：KR19990066236

申请日期：1999.12.30

申请公布日期：2001.07.06

申请人：

HYNIX SEMICONDUCTOR INC.

发明人：CHOI, SANG SIN

分类号：G11C16/00;(IPC1-7):G11C16/00

主分类号：G11C16/00

摘要：PURPOSE: A voltage supply control circuit is provided to improve a low voltage operation characteristics by supplying a boosted voltage in case that a power supply voltage supplied to an EPROM cell is dropped below a fixed voltage. CONSTITUTION: A voltage booster(220) boosts a voltage(VCC), and a voltage level detection block(210) enables the voltage booster when the voltage(VCC) is below a specific voltage. A voltage level detection part(230) detects a level of the voltage(VCC), and a voltage supply part(290) supplies a voltage(VPP) or a boosted voltage to an EPROM cell. An inverter(270) inverts a write signal(Wten), and a voltage switching part(280) controls the voltage supply part to supply the voltage(VPP or VCC or 2VCC) to a gate of the EPROM cell with an output signal of the inverter and the write signal as input. A voltage supply part(260) outputs the voltage(VCC or VPP) to the voltage switching part, and an inverter(240) inverts an output signal(venb) of the voltage level detection part. And, a voltage switching part(250) controls the voltage supply part(260) with an output signal of the inverter(240) and the output signal of the voltage level detection part as input.