Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1975-08-14
1978-07-11
Anagnos, Larry N.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307251, 330277, 357 22, H03F 316, H03K 3353, H01L 2980
Patent
active
041004388
ABSTRACT:
A compound transistor circuitry having an output characteristic resembling that of a pentode vacuum tube comprises: a first field effect transistor having a saturated-type output characteristic resembling that of a pentode vacuum tube; and a second field effect transistor having an unsaturated-type output characteristic resembling that of a triode vacuum tube. The first and second field effect transistors have a conducting channel of a single and same conductivity type, respectively. The second field effect transistor is connected in series with the drain current path of the first field effect transistor. This second field effect transistor is rendered conductive only when the drain-source voltage of the first field effect transistor exceeds its pinch-off voltage.
REFERENCES:
patent: 3767946 (1973-10-01), Berger et al.
patent: 3828230 (1974-08-01), Nishizawa et al.
patent: 3927383 (1975-12-01), Fjarlie et al.
Csanky et al., "Combining FETs for Higher Gains"; Electronic Design, pp. 36-44, 9/27/1963.
"Cascode Field Effect Transistor Applications"; Amelco Semiconductor; Division of Teledyne, Inc.; Tech. Notes No. 5, pp. 1-14; 10/1963.
Wyland, "FET Cascode Technique Optimizes Differential Amplifier Performance"; Electronics; pp. 81-84; 1/18/1971.
Evan-Hart, "The Replacement of Thermionic Valves by Junction Field Effect Hybrid Circuits"; Electronics Components (pub); vol. 14, No. 2, pp. 78-81; 1/26/73.
Anagnos Larry N.
Nippon Gakki Seizo Kabushiki Kaisha
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