Input circuit

Details Input circuit Input circuit

1996-05-28

1998-08-11

Westin, Edward P.

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Output switching noise reduction

326 86, 326 83, H03K 1716, H03K 190175

Patent

active

057932220

ABSTRACT:
An input circuit of an input-output device has a waveform shaping function to relieve waveform distortion at an input-output line so that the upper bound of an operating frequency is enhanced while keeping sufficiently high and low signal levels. A signal waveform given to the input-output line is shaped by an inverter and transmitted as an input signal to an internal circuit. When receiving a signal, the input circuit of the input-output device uses a feedforward operation on the signal applied to the input-output line so as to shape the signal present on the input-output line. A period for the feedforward operation is determined by the delay time of a delay element.

REFERENCES:
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patent: 5057711 (1991-10-01), Lee et al.
patent: 5440182 (1995-08-01), Dobbelaere
patent: 5654648 (1997-08-01), Medhekar et al.
patent: 5666069 (1997-09-01), Gibbs
1995 IEEE International Solid-State Circuits Conference Tech. Papers, pp. 252-253, Masashi Horiguchi, et al., "An Experimental 220MHz 1Gb DRAM".
1992 IEEE International Solid-State Circuits Conference Tech. Papers, pp. 58-59, Bill Gunning, et al., "A CMOS Low-Voltage-Swing Transmission-Line Transceiver".

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