Methods and apparatus for charging a sense amplifier

Details Methods and apparatus for charging a sense amplifier Methods and apparatus for charging a sense amplifier

1996-08-09

1998-06-16

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327 51, G05F 110, G11C 706

Patent

active

057677379

ABSTRACT:
A dynamic random access memory generates an internal power supply voltage IVCC. IVCC is lower in magnitude than the external power supply voltage EVCC. During a read operation, the sense amplifiers are powered from EVCC while the bit lines charge to their output levels. Then the sense amplifiers stop being powered from EVCC and begin being powered from IVCC to maintain the bit lines at their output levels. A timer defines the time that the sense amplifiers are powered from EVCC. This time depends inversely on EVCC. The timer includes a transistor connected between EVCC and an input of the inverter. The time that the sense amplifiers are powered from EVCC is defined by the time that the input of the inverter charges to the trip point of the inverter.

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patent: 5313434 (1994-05-01), Abe
patent: 5325335 (1994-06-01), Ang et al.
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patent: 5446694 (1995-08-01), Tanaka et al.
patent: 5477498 (1995-12-01), Ooishi
patent: 5539279 (1996-07-01), Takeuchi et al.
patent: 5646880 (1997-07-01), Yuh
patent: 5657278 (1997-08-01), Lee

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