Digital signal generating circuit

Details Digital signal generating circuit Digital signal generating circuit

1981-07-31

1984-01-24

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

328119, H03K 1300, H03K 1908, H03K 19092

Patent

active

044279043

ABSTRACT:
A digital signal generating circuit having a control site, a remote digital signal generating site and a two-wire cable connecting said control site and said digital signal generating site. The control site produces various Zener diode trap voltages by switch state combinations. These trap voltages are transmitted to said digital signal generating site through said two-wire cable. A plurality of level sensing units are provided in said digital signal generating site. These level sensing units sense the respective levels of the transmitted trap voltages. A plurality of switching units are provided relating to the respective level sensing units, each for generating one of two logical outputs when the related sensing unit senses a predetermined trap level condition.

REFERENCES:
patent: 3011075 (1961-11-01), Tomlinson
patent: 3155839 (1964-11-01), Modiano
patent: 3433978 (1969-03-01), Bongenaar et al.
patent: 4042915 (1977-08-01), Reed

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