Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1988-10-11
1990-09-25
James, Andrew J.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328 23, 328 381, 328186, 307227, 307529, 307271, 364270, 3649331, 364934, H03B 1900, H03K 513, H03K 402, G06F 100
Patent
active
049596160
ABSTRACT:
A digital oscillation apparatus includes a data generator and an accumulator which function as follows. The data generator is responsive to each clock of a clock signal having a frequency fc for generating data used to generate a data string which has a total value R (R is an integer) in a repetition period of m clocks (m is an integer). Accordingly, the average value of each data of the data string generated in response to each clock becomes R/m. The accumulator has a dynamic range D (D is an integer) and is responsive to each clock of the clock signal for accumulating a sum of each data (average value=R/m) of the data string generated by the data generator and a constant A (A is an integer) until the accumulated result exceeds the dynamic range. That is, data having an average value A+R/m is accumulated in response to each clock of the clock signal. When the accumulated result exceeds the dynamic range D, the accumulator subtracts the dynamic range D from the accumulated result, or resets the accumulated result. If the values of R, m, A and D are set to satisfy a relationship of fs/fc= (A+R/m)D, where fs is a frequency of a periodic waveform data to be generated as an output of the apparatus, the accumulator generates periodic waveform data having a frequency fs=(A+R/m).multidot.fc/D.
REFERENCES:
patent: 2858434 (1958-10-01), Tollefson
patent: 3121803 (1964-02-01), Watters
patent: 3657657 (1972-04-01), Jefferson
patent: 3919649 (1975-11-01), Logemann, Jr.
patent: 4692713 (1987-09-01), Cordwell et al.
patent: 4727570 (1988-02-01), Tarbouriech
patent: 4737720 (1988-04-01), Mills
patent: 4804863 (1989-02-01), Welland et al.
James Andrew J.
Phan Trong Quang
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