Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-10-17
1999-07-27
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327541, 323316, G05F 110
Patent
active
059296968
ABSTRACT:
An internal voltage conversion circuit for a DRAM wherein a voltage level of an internal power supply is regulated by an external signal applied to the DRAM pins after packaging to perform reliability tests. The internal voltage conversion circuit includes a test mode signal generator, for generating a test mode signal by combining first control signals applied externally of the semiconductor device, and a switching signal generator, for generating first and second switching signals according to second control signals applied externally of the DRAM when the test mode signal is active. First and second switching resistor portions connected in series between the internal power supply port and a ground potential are switched by the first and second switching signals, respectively, so that their resistance values are changed. The resistor portions are in a feedback path connected to one input of a comparator. The other input is connected to a reference cell. The internal voltage supply varies responsive to changes in resistance values.
REFERENCES:
patent: 4127783 (1978-11-01), Alaspa
patent: 4570115 (1986-02-01), Misawa et al.
patent: 5124631 (1992-06-01), Terashima
patent: 5485117 (1996-01-01), Furumochi
patent: 5493205 (1996-02-01), Gorecki
patent: 5563553 (1996-10-01), Jackson
patent: 5689460 (1997-11-01), Ooishi
Joo Jae-hoon
Kang Sang-seok
Lee Jin-seok
Lim Jong-hyoung
Cunningham Terry D.
Hasonzadah Maria
Samsung Electronics Co,. Ltd.
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