Method and apparatus for maintaining an active device below a ma

Details Method and apparatus for maintaining an active device below a ma Method and apparatus for maintaining an active device below a ma

1990-10-24

1993-09-28

Teska, Kevin J.

Boots, shoes, and leggings

324 711, 361103, 364480, 364579, H02H 500, H02H 300, G06F 1556

Patent

active

052491412

ABSTRACT:
The present invention relates to the protection of a semiconductor active device from thermal breakdown without actually measuring the temperature of the semiconductor active device. Instead, the present invention measures the magnitude of the forward electrical signal generated by the active device and the reflected electrical signal resulting from the interaction of the forward electrical signal and a load. The thermal energy generated by the active device is a function of these electrical signals. The generated thermal energy is transferred out of the active device at a predetermined rate. The temperature of the active device is calculated as a function of the thermal energy generated by the active device and the amount of thermal energy transferred out of the active device. When the calculated temperature is above a predetermined value, the active device is shut off, thereby preventing further generation of thermal energy.

REFERENCES:
patent: 3622849 (1971-11-01), Kelley, Jr. et al.
patent: 4001649 (1977-01-01), Young
patent: 4052744 (1977-10-01), Boothman et al.
patent: 4053996 (1977-10-01), Schertz et al.
patent: 4054845 (1977-10-01), Glogolja et al.
patent: 4117527 (1978-09-01), Demarest et al.
patent: 4727450 (1988-02-01), Fachinetti et al.
patent: 4779161 (1988-10-01), DeShazo, Jr.
patent: 4787007 (1988-11-01), Matsumura et al.
patent: 4903106 (1990-02-01), Fukunaga et al.
patent: 5008771 (1991-04-01), Palara
patent: 5050114 (1991-09-01), Lee
patent: 5057962 (1991-10-01), Alley et al.

Affiliated with

Also associated with

Rating

Method and apparatus for maintaining an active device below a ma does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for maintaining an active device below a ma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for maintaining an active device below a ma will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2195192