Modulo-10 counter for both counting directions

摘要

The forwards-backwards counter according to the subject of the invention differs from the forwards-backwards counter according to P 3800059.8 in that the negating circuits (23) and AND circuits (24) are not arranged, and that, only for the middle triggering of the OR circuit (35), such a blocking circuit, which consists of the negating circuit (24) and the AND circuit (25), is arranged. The decades thus supply the decade counter state in 51111 code, not 54321 code. <IMAGE>