Operation controller for a semiconductor memory device

Details Operation controller for a semiconductor memory device Operation controller for a semiconductor memory device

1998-04-22

2000-05-09

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

Having selection between plural continuous waveforms

327293, 327294, H03K 1700

Patent

active

060609168

ABSTRACT:
A semiconductor memory device including an operation control circuit for selecting between a single data rate (SDR) mode and a double data rate (DDR) mode. The operation control circuit includes a mode selector for generating a master signal which selects between the SDR and the DDR mode. The operation control circuit also includes a shift register, a repeater, and a pulse generator. When the SDR mode is selected, the shift register generates an output clock signal which changes states every period of the input clock signal. When the DDR mode is selected, the repeater generates an output clock signal which changes states with every state change of the input clock signal. Productivity efficiency is enhanced and production costs are reduced by providing both the SDR and the DDR mode circuitry and the operation control circuit on a single chip.

REFERENCES:
patent: 4965524 (1990-10-01), Patchen
patent: 5336939 (1994-08-01), Eitrheim et al.
patent: 5668492 (1997-09-01), Pedersen et al.
patent: 5767720 (1998-06-01), Osera et al.
patent: 5850150 (1998-12-01), Mitra et al.

Affiliated with

Also associated with

Rating

Operation controller for a semiconductor memory device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Operation controller for a semiconductor memory device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operation controller for a semiconductor memory device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1068703