Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-01-31
1992-11-10
Howell, Janice A.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328 22, 307271, 307529, H03B 1900, H03L 700
Patent
active
051627450
ABSTRACT:
A multichannel sine synthesizer for the primary signal production in measuring signal generators having a phase accumulator (11), a low-pass filter (12), an interposed first synthesis channel (13) and a clock control unit (25) which together convert a phase increment applied to the phase accumulator (11) into a sinusoidal signal. A problem in such synthesizers is the comparatively low maximum frequency of the sinusoidal signal produced because this frequency is limited by alias frequency effects. This is the reason why, in order to increase the maximum frequency with the same clock frequency, there is connected parallel to the synthesis channel (13) at least one further modified synthesis channel (26), which operates so as to be shifted in the time and to the input side of which is applied an additive phase value constant with a given frequency. Furthermore, via the clock control unit, each further synthesis channel (26) receives a clock signal individually shifted in time so that at the output of a summator (15) a sinusoidal signal appears. This signal has a maximum frequency increased by a multiple with respect to the monochannel synthesizer (13). The operative (Nyquist) sampling rate is increased proportionally to the parallel synthesis channels (26) and a sufficient attenuation of the alias frequency components is obtained by the low-pass filter (12).
REFERENCES:
patent: 3654450 (1972-04-01), Webb
patent: 3657657 (1972-04-01), Jefferson
patent: 3845395 (1974-10-01), Murphree
patent: 4003003 (1977-01-01), Haeberlin
patent: 4454486 (1984-06-01), Hassun et al.
patent: 4700390 (1987-10-01), Machida
patent: 4740995 (1988-04-01), Schevin et al.
patent: 4839603 (1989-06-01), Mower et al.
patent: 4845436 (1989-07-01), Kobayashi et al.
patent: 4878027 (1989-10-01), Carp et al.
Franzblau Bernard
Howell Janice A.
Tran Sinh N.
U.S. Philips Corporation
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