Appeal No. 2005-1576
Application No. 09/885,217
acting in response to the reference signal, which is dependent on
the external voltage, for producing the reference voltage.
Claim 223 is illustrative of the invention and reads as
follows:
223. A voltage reference circuit responsive to an external
voltage for supplying a reference voltage, comprising:
an active reference circuit for receiving the external
voltage and for producing a reference signal having a desired
relationship with the external voltage, said active reference
circuit comprising a current source utilizing a current mirror
for providing current to a diode stack having an adjustable
impedance, wherein said reference signal is dependent upon said
external voltage; and
a unity gain amplifier responsive to said reference signal
for producing the reference voltage.
The Examiner relies on the following prior art:
Hayakawa et al. (Hayakawa) 5,184,031 Feb. 02, 1993
Park 5,448,199 Sep. 05, 1995
Morishita et al. (Morishita) 5,757,175 May 26, 1998
(filed Jan. 13, 1997)
Zarrabian et al. (Zarrabian) 5,838,076 Nov. 17, 1998
(filed Nov. 21, 1996)
Tsay et al. (Tsay) 6,127,881 Oct. 03, 2000
(filed May 31, 1994)
Claims 223 and 511 stand finally rejected under 35 U.S.C.
§ 102(e) as being anticipated by Morishita. Claims 225, 496,
499, 500, and 514 stand finally rejected under 35 U.S.C. § 103(a)
as being unpatentable over Morishita in view of Zarrabian.
Claims 228-230 and 501-503 stand finally rejected under 35 U.S.C.
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