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Machine translation
1. (WO1980000201) PROGRAMMABLE CONTROLLER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000201    International Application No.:    PCT/US1979/000477
Publication Date: 07.02.1980 International Filing Date: 02.07.1979
IPC:
G05B 1/02 (2006.01), G05B 21/02 (2006.01), G05D 23/24 (2006.01), G06G 7/66 (2006.01)
Applicants:
Inventors:
Priority Data:
921538 03.07.1978 US
Title (EN) PROGRAMMABLE CONTROLLER
(FR) CONTROLEUR PROGRAMMABLE
Abstract: front page image
(EN)Circuit (10) for generating an error voltage (26) which is proportional to the difference between a desired value of a physical parameter and the actual value of the physical parameter. The circuit (10) operates by alternately switching the current from a source (13) through a fixed resistor (11) and a variable resistor (12), the resistance value of which changes as a function of the physical parameter to be controlled. The current is switched between the two resistors so that the average voltage generated across the variable resistor would be equal to the average voltage generated across the fixed resistor if the physical parameter had the desired value. By determining the difference between the average voltage across the resistors, the error voltage (26) can be generated for controlling the physical parameter.
(FR)Un circuit (10) produit une tension d"erreur (26) proportionnelle a la difference entre une valeur desiree d"un parametre physique et la valeur reelle11e du parametre physique. Le circuit (10) fonctionne par commutation alternee du courant depuis une source (13) au travers une resistance fixe (11) et une resistance variable (12), dont la resistance change en fonction du parametre physique a controler. Le courant est branche entre les deux resistances de sorte que la tension moyenne produite sur la resistance variable soit egale a la tension moyenne produite sur la resistance fixe si le parametre physique possede la valeur desiree. En determinant la difference entre la tension moyenne, entre les resistances, la tension d"erreur (26) peut etre obtenue pour commander le parametre physique.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)