Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-10-11
1998-10-20
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327546, 327538, 327543, 327540, 327541, G05F 110, G05F 302
Patent
active
058252371
ABSTRACT:
The object of the present invention is to provide a reference voltage generation circuit which is arranged to obtain the stability of a reference voltage Vref both at the time of start of the power source voltage and at the time of fluctuation of the power source voltage for the reference voltage generation circuit that generates a high reference voltage (Vref). When closing the power source, a low level signal and a high level signal are output from a power source start circuit. These signals are received by a started circuit to thereby make all transistors therein "on" and thereby output a stable reference voltage Vref. The starting characteristic is improved compared to that of a conventional reference voltage generation circuit, whereby the starting has become possible to attain. Even when the power source voltage sharply fluctuates, a stable reference voltage Vref can be output. It has become possible to make compatible the outputting of a high reference voltage Vref and the stability of the reference voltage Vref at the time of sharp fluctuation of the power source voltage.
REFERENCES:
patent: 4634905 (1987-01-01), Campbell, Jr.
patent: 5243231 (1993-09-01), Baik
patent: 5287011 (1994-02-01), Koshikawa et al.
patent: 5467052 (1995-11-01), Tsukada
patent: 5565811 (1996-10-01), Park et al.
Callahan Timothy P.
Luu An T.
Seiko Instruments Inc.
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