Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1998-02-26
1999-09-14
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327 80, 327534, G05F 302
Patent
active
059528710
ABSTRACT:
A substrate voltage generating circuitry for a dynamic random access memory (DRAM) generates the substrate voltage using an intermittently enabled charge pump. The value to which the substrate voltage is regulated is adjusted responsive to the static refresh and dynamic refresh characteristics of the memory cells. The adjustment is made in the portion of the substrate voltage generating circuit used for sensing the substrate potential, using fusible links that can be interrupted or cut with a laser beam. Novel circuitry for sensing the substrate potential, which does not load the substrate so as to dissipate charge placed thereon by the charge pump, is used in preferred substrate voltage generating circuitry.
REFERENCES:
patent: 5039877 (1991-08-01), Chern
patent: 5266842 (1993-11-01), Park
patent: 5367489 (1994-11-01), Park et al.
patent: 5426334 (1995-06-01), Skovmand
patent: 5448199 (1995-09-01), Park
patent: 5473277 (1995-12-01), Furumochi
patent: 5554953 (1996-09-01), Shibayama et al.
patent: 5572147 (1996-11-01), Huang et al.
"A Tunable CMOS-DRAM Voltage Limiter With Stabilized Feedback Amplifer," by M. Horiguchi, M. Aoki, J. Etoh, H. Tanaka, S. Ikenaga, K. Itoh, K. Kajigaya, H. Kotani, K. Ohshima and T. Matsumoto; 1990 Symposium on VLSI Circuits, pp. 75-76.
Cunningham Terry D.
Samsung Electronics Co,. Ltd.
LandOfFree
Substrate voltage generating circuit of semiconductor memory dev does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Substrate voltage generating circuit of semiconductor memory dev, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Substrate voltage generating circuit of semiconductor memory dev will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1513722