Control and holding circuit for relay matrices

Details Control and holding circuit for relay matrices Control and holding circuit for relay matrices

1974-06-05

1976-02-03

Robinson, Thomas A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340166S, H04Q 152

Patent

active

039366120

ABSTRACT:
In a relay matrix there are provided a plurality of control and holding circuits for selecting which of the relays are to be energized. The control and holding circuits which are associated with groups of relays include two-state devices which are triggered into a conductive state at the coincidence of a control signal and a minimum value control current and remain in that state after the termination of the control signal until the control current falls below the minimum value.

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