Oscillators – Frequency stabilization – Temperature or current responsive means in circuit
Reexamination Certificate
2009-06-12
2011-12-13
Johnson, Ryan (Department: 2817)
Oscillators
Frequency stabilization
Temperature or current responsive means in circuit
C331S111000, C331S143000, C331S066000
Reexamination Certificate
active
08076984
ABSTRACT:
A periodic signal generating circuit which is dependent upon temperature for establishing a temperature independent refresh frequency is presented. The periodic signal generating circuit includes a reference voltage generating unit and a periodic signal generating unit. The reference voltage generating unit produces a reference voltage which exhibits a variable voltage level in response to temperature. The periodic signal generating unit produces a periodic signal in response to a set voltage to determine the reference voltage and an oscillation period, wherein a transition timing of the set voltage is controlled by the reference voltage. As a result the periodic signal has a relatively constant period which can be produced regardless of the temperature variation.
REFERENCES:
patent: 6084483 (2000-07-01), Keshtbod
patent: 6518847 (2003-02-01), Sauer
patent: 6642804 (2003-11-01), Chrissostomidis et al.
patent: 6891443 (2005-05-01), Rashid
patent: 2006/0226922 (2006-10-01), Rajagopal et al.
patent: 2007/0241833 (2007-10-01), Nervegna
patent: 1020040007124 (2004-01-01), None
Hwang Mi Hyun
Song Ho Uk
Hynix / Semiconductor Inc.
Johnson Ryan
Ladas & Parry LLP
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