Bit finder circuit

Details Bit finder circuit Bit finder circuit

1991-09-13

1993-05-11

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

3408259, 379292, H04Q 100, H01H 6700, H04M 900

Patent

active

052105296

ABSTRACT:
A circuit to find the first bit 0 or 1 in an m-bit input word from a start bit onwards, the positions of these bits being defined by an n-bit code. It includes a crosspoint matrix of m (4) rows and n (2) columns, each crosspoint including a change-over contact (ABC), with a make contact (AB) and a break contact (AC), and another make contact (AD). The rows of change-over contacts (ABC) are controlled by respective bits of the m-bit word and the break contacts (AC) of the change-over contacts (ABC) of each row are coupled to respective bits of the n-bit code identifying the bit of the m-bit word respectively controlling these break contacts. Furthermore, the make contacts (AB) of the change-over contacts (ABC) of a same column are connected in a closed loop, while the other make contacts (AD) of a same column are connected in a parallel to a same output terminal (IA, IB), the rows of these other make contacts being controlled by a single-row selection circuit (TR).

REFERENCES:
patent: 3522587 (1970-08-01), Brown
patent: 3557317 (1971-01-01), Porter
patent: 4351985 (1982-09-01), Schlichte et al.

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