Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-05-09
1999-03-02
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327545, 327 81, 327143, G05F 110
Patent
active
058776524
ABSTRACT:
A voltage detecting circuit and method in a synchronous DRAM is disclosed. The circuit includes first and second pull-up switching portion, first and second pull-down switching portion, first and second pull-up portion, first and second pull-down portion, ; switching transistor and a driving portion. The pull-up and pull-down switching portion are selectively turned-on according to a mode control signal, and the current paths are different for the active power down mode and the normal mode. Each pull-up portion includes a plurality of NMOS transistors connected in series and gated by the boosted voltage and each pull-down portion includes a plurality of NMOS transistors connected in series. An effective channel length of the current path selected in case of the active power down mode is longer than that selected in case of the normal operation mode. Accordingly, the resistance of the pull-up portion and the pull-down portion in the active power down mode increases to thereby reduce the current flow and power consumption.
REFERENCES:
patent: 5448199 (1995-09-01), Park
patent: 5557232 (1996-09-01), Shimogawa
patent: 5565807 (1996-10-01), Ward
Samsung Electronics Co,. Ltd.
Tran Toan
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