Semiconductor memory device including circuit for blocking operation of bias circuit and bias voltage generating method thereof

摘要

The semiconductor memory device and its bias voltage generation method is disclosed which includes a bias circuit operation blocking circuit. In the semiconductor memory device in self-refresh mode, the bias circuit operates blocking circuit is disabled by the bias circuit , and also a predetermined voltage level bias circuit is not putting the output terminal of the bias circuit by the target current supply circuit is disabled during flow precharged . Therefore, the characteristics of analog circuitry connected to the output terminal of the bias circuit without being affected the power consumption in the self refresh mode is greatly reduced .