Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1976-05-10
1977-05-17
Heyman, John S.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307208, 307205, 307216, 307232, 58 23A, 328 61, 328133, H03K 3353, H03K 117
Patent
active
040244164
ABSTRACT:
A frequency standard for an electronic timepiece comprising a low frequency oscillator and a high frequency oscillator of which the frequency is an integral multiple of a predetermined frequency of the lower frequency oscillator. A phase difference detector is coupled to the lower and higher frequency oscillators to produce a signal occurring at intervals depending on the phase difference between the two oscillators. A frequency divider is provided to divide down the frequency of the signal by the integral multiple to produce a phase difference signal. The phase difference signal is algebraically added to the lower frequency oscillator signal to generate an output signal of which frequency is equal to that of the high or frequency oscillation signal divided by the integral multiple.
REFERENCES:
patent: 3124755 (1964-03-01), Williamson et al.
patent: 3510783 (1970-05-01), Smith
patent: 3512351 (1970-05-01), Shelley et al.
patent: 3514705 (1970-05-01), Feigleson
patent: 3870900 (1975-03-01), Malaviya
patent: 3978649 (1976-09-01), Naito
Fujita Hiro
Morokawa Shigeru
Tsuzuki Akira
Citizen Watch Co. Ltd.
Heyman John S.
Jordan Frank J.
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