Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1974-02-11
1976-07-27
Grimm, Siegfried H.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307233R, 324 79D, G01R 2300, H03D 1300, H03K 520
Patent
active
039719944
ABSTRACT:
A circuit arrangement for indicating when the pulse repetition frequencies of two pulse trains differ by a predetermined amount comprises a multi-stage shift register containing a binary digit in one of the central stages, pulses from each train are applied to the register alternately by means of clock pulses and individual pulses of each train cause the binary digit to be moved through one stage but in opposite senses. While the repetition frequencies are equal the binary digit oscillates between two stages but if unequal numbers of pulses are received in each train then the binary digit migrates along the stages of the register. An output signal is derived from stages of the register displaced by a predetermined number from the central stages. The circuit is reset after a predetermined number of input pulses so that the percentage difference between the two repetition frequencies is indicated.
REFERENCES:
patent: 3312903 (1967-04-01), Webb
patent: 3512085 (1970-05-01), Peterson et al.
patent: 3657732 (1972-04-01), Kranse
patent: 3670250 (1972-06-01), Fritkin
patent: 3808407 (1974-04-01), Ratz
patent: 3813604 (1974-05-01), Denoncourt
patent: 3814918 (1974-06-01), Nash et al.
patent: 3879665 (1975-04-01), Carlow et al.
Ferranti Limited
Grimm Siegfried H.
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