Apparatus of controlling supply voltage of delay locked loop for reducing current consumption

摘要

current power control device to reduce the consumption of the delay locked loop is initiated. Power control device for a delay locked loop to reduce the current consumption in accordance with the present invention, the delay-locked loop on / off control signal applied from the outside, a first address and a predetermined off-delay period of the delay-locked loop locked loop in response to a signal first power enable control delay locked loop for generating the enable signal, the initial voltage set by inputting the signal of the delay locked loop is set by default in the delay locked loop according to the on / off whether to enable or disable the power supply The default delay for generating a second power-enable signal for controlling the power supply locked loop on / off control, the default delay-locked loop on / off in the state set by the control unit to operate the delay lock loop in the test mode, the external In response to the test mode control signal and the second address and the initial voltage setting signal is applied to the third test mode control unit and the first to third power-enable signal for generating a power enable signal is applied to a delay locked loop in combination logic in that it comprises a power supply control signal output for generating a power control signal for controlling the power supply voltage, and characterized, and supply power to the DLL is to be maintained at a stable level in a short enough time, the DLL on / off set by default Therefore, there is an effect that the power supply circuit is turned on / off to be selectively be implemented in a chip manufacturing step.