Abstract: A memory device having a short precharge time is disclosed. The memory device selects at least two pairs of bit lines and connects the selected two pairs of bit lines to the sense amplifier within a preparatory period during which the two pairs of bit lines and an input to the sense amplifier are precharged. In the preparatory period an input unit of the sense amplifier is precharged through by a plurality of precharge units through more than two bit lines, and thus the precharge time may be decreased. The memory device selects one pair of bit lines and connects the selected pair of bit lines to a sense amplifier within a read/write (data transmission) period.

Abstract: A power gating circuit of a memory device includes a power gating unit and a control unit. The power gating unit includes first, second, and third power gating transistors connected in parallel between a power supply voltage and an internal power supply voltage bus of the memory device. The three power gating transistors are sequentially turned ON. The second and third power gating transistors turn ON sequentially in response to the increasing voltage level of the bus. The timing points when the second and third power gating transistors are sequentially turned ON is based upon detecting the gradually increasing the voltage level of the internal power supply voltage. The size of the first power gating transistor may be smaller than the size of the second power gating transistor, and the size of the second power gating transistor may be smaller than the size of the third power gating transistor.

Abstract: A method and mobile device for decoding a paging message transmitted as multiple bursts in a wireless communication system are provided. In the method, only the first burst among four bursts of a transmitted paging message is received and equalized. The equalized first burst is compared (e.g., by computing correlation) with a reference paging message. The first comparison result value obtained from the first comparison is compared with a threshold value. If the first comparison result value is greater than the threshold value, second through fourth bursts of the paging message are not received, and a previous decoded paging message is output and a sleep state is entered. If the comparison result value is not greater than the threshold value, the second through fourth bursts are received and decoded, the decoded paging message is encoded, and a first burst of the encoded paging message is stored as the reference paging message.

Abstract: A method of decoding a control channel in a wireless communication system is provided. In the method, a terminal calculates the number of sub-bursts to be used during a next decoding and positions of the sub-bursts, based on a signal-to-noise ratio of at least one of a first burst or a second burst. Then, the terminal compares the calculated number of sub-bursts with a reference value. When the calculated number of sub-bursts is greater than the reference value, the terminal does not receive more bursts or sub-bursts and instead enters into a sleep state. When the calculated number of sub-bursts is smaller than or equal to the reference value, the terminal receives and decodes only sub-bursts at the calculated positions.