CIRCUIT INTEGRE NUMERIQUE A SEMICONDUCTEURS ET SYSTEME DE COMMANDE NUMERIQUE METTANT EN OEUVRE CE CIRCUIT

• Main Authors: SHIROU BABA, BABA SHIROU
• Format: Patent
• Language: French
• Published: 21.08.1981
• Subjects: CALCULATING; COMPUTING; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

LE CIRCUIT INTEGRE NUMERIQUE A SEMICONDUCTEURS COMPORTE UN CIRCUIT D'ENTREE DES SIGNAUX NUMERIQUES 12, UN CIRCUIT D'ENTREE DES SIGNAUX ANALOGIQUES 13 APTE A RECEVOIR UN SIGNAL ANALOGIQUE EN VUE DE DELIVRER UN SIGNAL NUMERIQUE CORRESPONDANT A CE DERNIER, ET DES BORNES EXTERIEURES COMMUNES P-P RACCORDEES EN COMMUN AUX BORNES D'ENTREE DES CIRCUITS D'ENTREE 12, 13; GRACE A UN CIRCUIT APPROPRIE DE COMMANDE ET DE COMMUTATION 18, Q-Q, ON PEUT UTILISER LA BORNE EXTERIEURE COMMUNE EN TANT QUE BORNE D'ENTREE DE SIGNAUX ANALOGIQUES OU DE SIGNAUX NUMERIQUES, CE QUI PERMET DE REDUIRE LE NOMBRE DES BORNES EXTERIEURES DU CIRCUIT INTEGRE. APPLICATION NOTAMMENT AU SYSTEME DE COMMANDE ELECTRONIQUE D'UN MOTEUR DE VEHICULE AUTOMOBILE. Herein disclosed is a digital semiconductor integrated circuit which is equipped with: a digital signal input circuit; an analog signal input circuit made receptive of an analog signal for feeding out a digital signal corresponding to said analog signal; and a common external terminal connected commonly with the input terminals of said digital signal input circuit and said analog signal input circuit. By the preparation with the use of a suitable switch circuit, the common external terminal can be used as either an analog signal input terminal or a digital signal input terminal. As a result, the number of the external output terminals required for the semiconductor integrated circuit can be reduced.