Electrical transmission or interconnection systems – Switching systems – Plural switches
Patent
1992-02-20
1994-04-19
Gaffin, Jeffrey A.
Electrical transmission or interconnection systems
Switching systems
Plural switches
307116, 307125, H01H 900
Patent
active
053048512
ABSTRACT:
A plurality of resistors are series-connected between a first terminal to which a power source potential is applied and a second terminal to which a ground potential is applied. The plurality of resistors have such plane patterns that the current conduction paths thereof are arranged in parallel to one another. Switches of a first group for changing a connection between the plurality of resistors and an output terminal are respectively connected between the plurality of resistors and the output terminal. Switches of a second group for changing a connection between the plurality of resistors and the second terminal are respectively connected between the plurality of resistors and the second terminal. The conduction states of the switches of the first group are controlled by an output signal of a first control circuit and the conduction states of the switches of the second group are controlled by an output signal of a second control circuit.
REFERENCES:
patent: 3693047 (1972-09-01), Hamstra
patent: 3973135 (1976-08-01), Scott
patent: 5070252 (1991-12-01), Castenschiold et al.
Gaffin Jeffrey A.
Kabushiki Kaisha Toshiba
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