Frequency-variable oscillator circuit

Details Frequency-variable oscillator circuit Frequency-variable oscillator circuit

1996-09-26

1998-06-02

Fears, Terrell W.

Static information storage and retrieval

Associative memories

Ferroelectric cell

365149, 365202, 365203, G11C 1124

Patent

active

057611084

ABSTRACT:
An integrated circuit semiconductor device includes a charge pump to provide current at a potential which is greater than a supply potential. The charge pump utilizes an oscillator, which causes the charge pump to cycle, and thereby provide a continuous output at an elevated potential. In order to optimize efficiency of the charge pump, the oscillator is able to change its frequency in response to output potential. In the preferred embodiments, this is accomplished by selectively inserting a supplemental portion into a ring oscillator loop. When used with an integrated circuit device, such as a DRAM, the current from the charge pump may be supplied to nodes on isolation devices and nodes on word lines, thereby improving the performance of the DRAM without substantially changing the circuit configuration of the DRAM array.

REFERENCES:
patent: 5623442 (1997-04-01), Gorou et al.

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