Patent ID: 6437636
Filing Date: 2002-08-20
Classification: G11C

Abstract:
A voltage boost device comprising:a supply line supplying a supply voltage; an input terminal receiving an operating condition signal having a first logic level, representing a standby operation state, and a second logic level, representing an active operation state; an output terminal supplying an output voltage higher than said supply voltage; a first voltage boost stage connected to said supply line; a second voltage boost stage connected to said supply line; and a switch circuit connected between the first and second voltage boost stages and said output terminal, the switch circuit coupled to receive the first and second logic levels to selectively connect the first voltage boost stage to the output terminal, or alternatively, the second voltage boost stage to the output terminal; said first voltage boost stage being enabled in the presence of said second logic level of said operating condition signal and being disabled in the presence of said first logic level of said operating condition signal, and said second voltage boost stage being controlled in a first operating condition in the presence of said first logic level of said operating condition signal, and being controlled in a second operating condition in the presence of said second logic level of said operating condition signal.