Clamping circuit for CMOS-input-type IC and power switching circ

Details Clamping circuit for CMOS-input-type IC and power switching circ Clamping circuit for CMOS-input-type IC and power switching circ

1990-05-14

1992-07-07

Hayes, Gail O.

Boots, shoes, and leggings

365228, 371 66, G11C 1300

Patent

active

051288630

ABSTRACT:
An integrated circuit using, at least in its input end, a CMOS IC. This CMOS-input-type IC comprises an input terminal to which a signal is to be inputted, a switching signal terminal to which a switching signal for shifting from a main power source to a backup power source is to be inputted, and clamping means disposed between the input terminal and remaining parts of the CMOS-input-type-IC. The clamping means comprises an output buffer circuit which forcibly lowers or raises the signal, which is to be inputted to said input terminal, to a low level or a high level, respectively, when the switching signal is inputted to said switching signal terminal. With this clamping means, it is possible to prevent, for a long time, a rush current from generating in the CMOS-input-type IC when the power source is switched from the main power source to the backup power source, thus preventing the supply voltage from lowering.

REFERENCES:
patent: 4290119 (1981-09-01), Masuda et al.
patent: 4607351 (1986-08-01), Gerber et al.
patent: 4617473 (1986-10-01), Bingham
patent: 4692903 (1987-09-01), Borg et al.
patent: 4771407 (1988-09-01), Takemae et al.
patent: 4777626 (1988-10-01), Matsushita et al.
patent: 4815041 (1989-03-01), Baylock
patent: 4884242 (1989-11-01), Lacy et al.
patent: 4984211 (1991-01-01), Tran
"Battery Backup Circuit For CMOS RAM", IBM Technical Disclosure Bulletin, vol. 27, No. 11, Apr. 1985.

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