Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1981-01-14
1983-04-26
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328 14, 328 18, H03B 1900, H03B 2102
Patent
active
043814611
ABSTRACT:
The frequency synthesizer to generate a selected, adjustable discrete frequency output signal comprises a pair of acoustic means, a circuit to excite one of the pair of acoustic means with pulses having a given repetition frequency and to excite the other of the pair of acoustic means by the pulses after being delayed a given variable amount, and a frequency mixer coupled to each of the pair of acoustic menas to provide the selected discrete frequency output signal. Several embodiments of the acoustic means are disclosed.
REFERENCES:
patent: 3568069 (1971-03-01), Gabor
patent: 3597699 (1971-08-01), Seipel
patent: 4056692 (1977-11-01), Place
patent: 4100498 (1978-07-01), Alsup et al.
1978 Ultrasonics Symposium Proceedings, IEEE Cat. #78CHI344-ISU, pp. 553-556, "An Improved Frequency Hop Modem Based on Chirp Mixing", by Eustace et al.
1975 Ultrasonics Symposium Proceedings, IEEE Cat. 75CHO994-4SU, pp. 371-376, "Programmable Signal Processing by Analog Chirp-Transformation using Saw Devices", by Atzeni, Manes & Masotti.
Proceedings of the IEEE, May 1976, pp. 826-828, "Generation & Correlation of Digitally Controlled Frequency-Hopped Waveforms using Surface Acoustic Wave Devices", by Grant, Morgan & Collins.
1977 Ultrasonics Symposium Proceedings, IEEE Cat. 77CHI264-ISU, pp. 514-523, "Performance of Frequency Hop Synthesisers Based on Chirp Mixing", by Darby, Bale & Estace; Hannah & Patterson.
Heyman John S.
Hill Alfred C.
International Telephone and Telegraph Corporation
O'Halloran John T.
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