Address transition detection summation circuit

Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By presence or absence pulse detection

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H03K 519

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active

060548789

ABSTRACT:
An address transition detection summation circuit is provided that selectively maintains an input voltage of a pull-up circuit at an intermediate level during a pull-up time. The address transition detection summation circuit includes a pull-up circuit and an address transition detection summation unit for summing a plurality of ATD signals. A delay unit delays an address transition detection summation node signal and can determine a pulse width of the address transition detection summation signal. An input signal generation unit can maintain the input level of the pull-up circuit at an intermediate level. Thus, although a short pulse ATD signal or a standard pulse ATD signal is inputted, a width of an address transition detection summation signal is made as wide as the ATD signal. Thus, the address transition detection summation signal more rapidly responds to the short pulse, which can prevent a failure of a chip operation.

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