Most restrictive digital to analog converter

Details Most restrictive digital to analog converter Most restrictive digital to analog converter

1975-05-27

1977-07-05

Miller, Charles D.

Communications: electrical

Audible indication

Percussion-type sound producer

307357, H03K 1300

Patent

active

040343650

ABSTRACT:
This disclosure relates to an electronic converter circuit for a cab signal system employing a negative feedback type of operational amplifier and two banks of resistive and diode elements. One bank of resistive and diode elements electrically couples the respective contacts of a master control handle through current limiting resistors and clamping diodes to the inverting input of the operational amplifier while the other bank of resistive and diode elements also electrically couples the respective outputs of a relay logic decoder through the current-limiting resistors and clamping diodes to the inverting input of the operational amplifier so that the operational amplifier produces an output signal which is indicative of the most restrictive speed condition of either the master control handle or the relay logic decoder.

REFERENCES:
patent: 3096446 (1963-07-01), Cohen
patent: 3355670 (1967-11-01), Pastoriza
patent: 3540037 (1970-11-01), Ottesen
patent: 3714465 (1973-01-01), Skrenes
patent: 3740652 (1973-06-01), Burgener

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