Patent Document ID: 3932739
Application ID: 05525422

Base Claim:
1. Apparatus for converting a serial binary number word to a BCD number word in a time frame equivalent to a word time multiplied by the number of bits in a word comprising, in combination: first means for supplying a serial binary number word of eight bits; second means for generating first and second series of constants having the values -80, -40, -20, -10, -8, -4, -2, -1, and -80, +40, +20, +10, +2, +4, +2, +1, respectively, one of each series of which is generated each word time in the frame; third means, connected to said first and second means and including output means, for modifying the word to be converted each word time of a frame by adding the value of the first series corresponding to the word in the frame if the sign of the previous word as modified was positive and by adding the value of the second series corresponding to the word in the frame if the sign of the previous word as modified was negative and supplying as an output a logic value indicative of the sign of the word as modified each word time; fourth means for generating words having a logic 1 in positions of consecutively decreasing value as the converter time frame of words proceeds; and fifth means, connected to receive signals from said third and fourth means and including output means, for providing as an output a summation of all words received from said fourth means during word times that the output of said third means is a given logic value.

---

Claim 2:
2. Apparatus as claimed in claim 1 wherein said third means comprises: gating means including first and second inputs for receiving the first and second series of constants from said second means and further including third input means; summation means and storage means for initially receiving the serial binary number supplied by said first means and comparing this number with a constant received from said second means during said first word time of the time frame and subsequently summing the constant received from said second means with a stored value of the previous summation; and means for detecting the sign of the word resulting from each summation by said summation means and presenting a signal indicative of the detected sign to said third input of said gating means during the following word time.