Pulse control device
AssigneeHynix Semiconductor Inc.
InventorsKyoung-Nam Kim, Tae-Yun Kim
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Abstract
A pulse control device is maintained with a constant pulse width corresponding to a change of process or temperature. The pulse control device comprises a fuse set for selectively outputting a delay increase signal and a delay decrease signal that have a different state based on a cutting or non-cutting state of a fuse on which information on a change of process is programmed, and a pulse generator provided with a plurality of delay cells with predetermined time delay for selectively increasing or decreasing the number of the plurality of delay cells depending on the delay increase signal and the delay decrease signal to generate an internal clock with a pulse width corresponding to the number of the increased or decreased delay cells.
Claims7
A pulse control device comprising:
- a mode register set configured to output a delay increase signal or a delay decrease signal according to a change of temperature;
- and
- a pulse generator having a delay controller configured to increase or decrease number of a plurality of delay cells in response to the delay increase signal or the delay decrease signal to generate an internal clock having a constant pulse width irrespective of the change of temperature,
- wherein the delay controller selectively transfers an output signal of a first delay cell or a reference clock to a second delay cell in response to the delay increase signal, and selectively outputs an output signal of the second delay cell or an output signal of a third delay cell delaying the output signal of the second delay cell in response to the delay decrease signal.
Dependencies are inferred from the claim text.