Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1975-12-16
1977-03-29
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307251, 307322, H03K 353
Patent
active
040151468
ABSTRACT:
This negative resistance network includes a first predetermined channel insulated gate enhancement type field effect transistor having a drain-source path connected to positive and negative input terminals on which a predetermined input voltage is impressed. The gate potential of the first field effect transistor is controlled by a second insulated gate enhancement type field effect transistor having an opposite channel type to the first field effect transistor, a gate connected to the drain thereof which is connected to the predetermined one of the positive and negative input terminals and a source connected to one pole of a dc power supply having a predetermined voltage, and by a third insulated gate enhancement type field effect transistor having the same channel type as the first field effect transistor, a drain and a gate connected to the drain of the second field effect transistor as well as to the gate of the first field effect transistor and a source connected to the source thereof which is connected to the other input terminal as well as to the other pole of the dc power supply, whereby the first field effect transistor shows a negative resistance characteristic attaining a relatively low current consumption over a relatively wide level range of the input voltage.
REFERENCES:
patent: 3255364 (1966-06-01), Warner, Jr.
patent: 3670184 (1972-06-01), Idei et al.
patent: 3840829 (1974-10-01), Fletcher et al.
Aihara Mitsuo
Ogawa Hisaharu
Takada Shigeho
Davis B. P.
Miller, Jr. Stanley D.
Tokyo Shibaura Electric Co. Ltd.
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