Registers – Platform operated – Platform actuated traffic counters
Patent
1977-04-06
1978-04-25
Thesz, Joseph M.
Registers
Platform operated
Platform actuated traffic counters
235 92CC, 235 92TC, 235 92R, 328 38, H03K 2136
Patent
active
040864715
ABSTRACT:
A pulse train converter converts a first pulse train into a second pulse train of a higher frequency. The pulse train converter comprises a pulse generator for generating pulses having a specified frequency, a frequency divider for dividing the output frequency of the pulse generator by .sub.2 M
, where n denotes an integer and M denotes the number of parts into which the time period of the pulses contained in the first pulse train is divided by the pulses contained in the second pulse train, a counter which is reset upon receipt of each pulse of the first pulse train and starts to count the output pulses from the frequency divider, and a register for storing the count of the counter upon receipt of each pulse of the first pulse train. The lower order n bits of the output of the register are supplied to compensation signal generator circuit, and the remaining higher order bits are preset in a preset counter as a reference value. The preset counter produces pulses constituting the second pulse train, each time it receives from the pulse generator pulses the number of which is equal to the reference value. The compensation signal generator cumulates the lower order n bits. Each time the value of the cumulated lower order bits reaches a specified value, it supplies a compensation signal to the preset counter, thereby to compensate the reference value.
REFERENCES:
patent: 3832640 (1974-08-01), Cederquist et al.
patent: 3867614 (1975-02-01), White
patent: 3937932 (1976-02-01), Ahlgren
Thesz Joseph M.
Tokyo Shibaura Electric Co. Ltd.
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