CMOS power supply voltage limiter

Details CMOS power supply voltage limiter CMOS power supply voltage limiter

1992-10-23

1993-11-30

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323313, 3072968, G05F 316

Patent

active

052668860

ABSTRACT:
A circuit for limiting a voltage appearing at an output terminal to a preselected range of voltages including a plurality of field effect transistors connected in series between first and second levels of potential to form a voltage divider network of the potential difference between the first and second levels of potential; an output field effect transistor having source, drain, and gate terminals, the source and drain terminals being connected between the first level of potential and the output terminal; and apparatus operating in response to a voltage provided by the voltage divider network for biasing the gate terminal of the output field effect transistor to transfer the first potential to the output terminal so long as the first potential remains below a predetermined value and for transferring the first potential less the switching voltage of the output field effect transistor to the output terminal if the first potential is greater than the predetermined value.

REFERENCES:
patent: 4675557 (1987-06-01), Huntington
patent: 4694199 (1987-09-01), Goetz
patent: 4814686 (1989-03-01), Watanabe
patent: 4868483 (1989-09-01), Tsujimoto
patent: 5045772 (1991-09-01), Nishiwaki et al.
patent: 5179297 (1993-01-01), Hsueh et al.

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