Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1983-05-23
1985-07-16
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307261, 307494, H03K 5153
Patent
active
045298939
ABSTRACT:
An odd-number of pairs of differential transistors are provided. Each transistor of any pair has one control electrode and first and second terminals. An input voltage is applied to the control electrode of one of the transistors of each pair. A reference voltage is applied to the control electrode of the other transistors of each pair. The first terminals of the transistors of each pair are connected to each other, forming a node. A first load circuit is connected to the second terminal of the transistors of each odd-numbered pair whose control electrodes are connected to receive the input voltage and to the second terminal of the transistor of each even-numbered pair whose control electrode is connected to receive a reference voltage. A second load circuit is connected to the second terminal of the transistor of each even-numbered pair whose control electrode is connected to receive the input voltage and to the second terminal of the transistors of each odd-numbered pair whose control electrodes are connected to receive a reference voltage. An output transistor is driven by an output delivered from the second terminal of any transistor which is connected to the second load circuit.
REFERENCES:
patent: 3649846 (1972-03-01), Frederiksen
patent: 4177394 (1979-12-01), Takasugi
patent: 4270118 (1981-05-01), Brokaw
patent: 4300063 (1981-11-01), Dunphy et al.
Tokyo Shibaura Denki Kabushiki Kaisha
Zazworsky John
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