摘要:
A power control circuit includes a check unit that receives a reference clock and generates a check signal for cyclically activating a feedback loop of a DLL circuit, a phase detecting unit that detects a phase difference between the reference clock and a feedback clock, and generates a phase difference detection signal, and a signal combining unit that generates a power cutoff signal in response to a locking completion signal, the check signal, and the phase difference detection signal.
摘要:
A duty cycle correcting circuit includes a duty ratio control signal generating block that detects a duty ratio of input clock signals and generates a duty ratio control signal comprising a plurality of bits, a power supply block that supplies a voltage to output nodes, and a signal processing block that controls voltage levels of the output nodes to correspond to voltage levels of the input clock signals in response to the plurality of bits of duty ratio control signals.
摘要:
An apparatus for setting a test mode in a semiconductor integrated circuit includes a test mode control block that generates a coding control signal according to whether or not a control fuse is cut, and a test mode coding block that sets default values of a multi-bit test code in response to the coding control signal.
摘要:
A DLL circuit includes a duty ratio detection unit that detects a duty ratio of a rising clock and a duty ratio of a falling clock, thereby outputting a duty ratio detection signal. A correction control unit generates a correction control signal in response to the duty ratio detection signal. A duty ratio correction unit corrects a duty ratio of an internal. clock in response to the correction control signal, thereby outputting a reference clock.
摘要:
A power-down mode control apparatus includes an internal power-down control block configured to receive a locking completion signal and to generate an internal power-down signal, which is toggled for a predetermined time; a noise check block configured to check occurrence/non-occurrence of noise on the basis of a phase detection signal and to generate a plurality of power-down selection signals in response to the locking completion signal and the internal power-down signal; and a power-down enter control block configured to generate a plurality of power-down enter signals, which instruct individual circuits to enter a power-down mode in response to a reference clock signal, the plurality of power-down selection signals, a power-down mode signal, and the internal power-down signal.
摘要:
A power control circuit includes a check unit that receives a reference clock and generates a check signal for cyclically activating a feedback loop of a DLL circuit, a phase detecting unit that detects a phase difference between the reference clock and a feedback clock, and generates a phase difference detection signal, and a signal combining unit that generates a power cutoff signal in response to a locking completion signal, the check signal, and the phase difference detection signal.
摘要:
A circuit configured to correct a duty cycle includes a clock dividing unit configured to delay an input clock signal by a specified delay amount and to generate a plurality of delayed clock signals, a clock selection unit configured to output any one among the plurality of delayed clock signals as a selected delayed clock signal in response to duty ratio information of the input clock signal, an edge control unit configured to generate a falling clock signal by controlling a falling edge of the selected delayed clock signal and to generate a rising clock signal by controlling a falling edge of the input clock signal based on information regarding a difference between lengths of a high duration and a low duration of the input clock signal, and a phase mixing unit for mixing phases of the falling clock signal and the rising clock signal and generating an output clock signal.
摘要:
A circuit for correcting a duty cycle includes a duty ratio digital conversion block configured to output duty ratio information of an input clock signal as plural-bit digital signals, a duty ratio information analyzing block configured to analyze the duty ratio information of the input clock signal, generate edge control signals, and select any one of a plurality of delayed clock signals, and a duty ratio control block configured to control duty ratios of a selected delayed clock signal and the input clock signal in response to the edge control signals.
摘要:
A power control circuit includes a check unit that receives a reference clock and generates a check signal for cyclically activating a feedback loop of a DLL circuit, a phase detecting unit that detects a phase difference between the reference clock and a feedback clock, and generates a phase difference detection signal, and a signal combining unit that generates a power cutoff signal in response to a locking completion signal, the check signal, and the phase difference detection signal.
摘要:
A method of controlling a power control circuit includes enabling a power cutoff signal when a delay locking operation of a Delay Locked Loop (DLL) circuit is completed, disabling the power cutoff signal for a predetermined time, and detecting a phase difference between a reference clock and a feedback clock to re-determine, on the basis of the detection result, whether or not to enable the power cutoff signal.