Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-06-06
1987-07-28
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307525, H03D 1300
Patent
active
046834370
ABSTRACT:
A method and apparatus are disclosed for electronically processing a variable frequency input signal and a reference input signal to develop an output signal representative of the frequency difference between the two input signals. The state of the variable frequency signal is sampled upon the occurrence of each leading edge of the reference signal to produce a first output signal. The state of the variable frequency signal is also sampled upon the occurrence of each trailing edge of the reference signal to produce a second output signal. The two output signals are preferably ORed to develop the final output signal.
REFERENCES:
patent: 3626307 (1971-12-01), Koyama
patent: 3656063 (1972-04-01), Vollmer
patent: 4050024 (1977-09-01), Winston, IV
patent: 4286220 (1981-08-01), Zalessky et al.
patent: 4392382 (1983-07-01), Myers
patent: 4550611 (1985-11-01), Czarnocki
Gasperini, "Digital Troubleshooting", 1975-1976, pp. 9.3.
Miller Stanley D.
Moore John H.
Motorola Inc.
Phan Trong Quang
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