Temperature compensated refresh clock circuit for memory...

Details Temperature compensated refresh clock circuit for memory... Temperature compensated refresh clock circuit for memory...

2007-06-26

2007-06-26

Mis, David (Department: 2817)

Oscillators

With device responsive to external physical condition

Temperature or light responsive

C331S143000, C327S291000

Reexamination Certificate

active

11121355

ABSTRACT:
A memory circuit that generates a positive temperature correlated clock frequency is described. One embodiment includes a voltage reference having a voltage determined at least in part by a diode or transistor having a negative temperature coefficient. A clock generator generates a clock having a frequency that is based at least in part on the voltage reference voltage so that the clock frequency has a positive temperature correlation. A memory charge pump is enabled at least in part by the clock.

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patent: 6163225 (2000-12-01), Sundaram et al.
patent: 6373324 (2002-04-01), Li et al.
patent: 6621326 (2003-09-01), Le
B. Keeth, et al. “CMOS Transconductor VCO with Adjustable Operating and Centre Frequencies”,Electronics Letters, vol. 31, No. 17, pp. 1397-1398, Aug. 1995.

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