Patricia M. Derian who heads the State Department's human rights office, urged the public yesterday to keep up pressure on behalf of Soviet dissient Anatoly Scharansky.

"If the Scharansky case isnt talked about, if isn't part of world consiousness, there's no hope," she said.

Derian assistance secretary of State for humanitarian affairs, made the comment in a meeting with a delegation from Temple Emanuel, a reform congregation in Kensington. The delegation, led by Rabbi Leon Adler, presented her with petitions for Scharansky containing more than 750 signatures collected on Rosh Hashanah, the Jewish New Year.

Scharansky, a 29-year-old computer technician, was arrested in March, after being accused in the Soviet press of being a spy for the Central Intelligence Agency. President Carter has denied the charge and has publicly and privately protested Scharansky's arrest to Soviet officials.

Derian, who called the Temple Emanuel documents representative of America's concern about the case, said she would write a personal note to the President and would transmit to him the temlpe's petition. The delegation asked her to transmit another petition to Soviet Ambassador Anatoliy Dobrynin.

Derian said she is not sure the Soviets have made a final decision to bring Scharansky to trial. She said a trial would be a "self-defeating act" and addedthat she hoped "they won't be so short-sighted."