Patent ID: 7542328
Filing Date: 2009-06-02
Classification: G11C

Abstract:
1. A method for detecting a bit line bridge of a memory device, comprising: enabling a word line and activating a sense amplifier enable signal in response to an active command; storing an even-numbered sense amplifier selection signal and an odd-numbered amplifier selection signal; activating a first supply voltage signal and a first ground signal for driving a plurality of odd-numbered sense amplifiers connected to a plurality of odd-numbered bit lines, and a second supply voltage signal and a second ground signal for driving a plurality of even-numbered sense amplifiers connected to a plurality of even-numbered bit lines, in response to the sense amplifier enable signal; activating a sense amplifier disable signal after a predetermined time has passed since the activation of the sense amplifier enable signal; deactivating the second supply voltage signal and the second ground signal, in response to the sense amplifier disable signal and the even-numbered sense amplifier selection signal, or deactivating the first supply voltage signal and the first ground signal, in response to the sense amplifier disable signal and the odd-numbered sense amplifier selection signal; and screening memory cell data between the even and odd bit lines.