Boots – shoes – and leggings
Patent
1984-08-23
1987-12-22
Gruber, Felix D.
Boots, shoes, and leggings
331 18, 3581951, 455164, 455182, 455265, H04B 126, H03L 708, G05B 1502
Patent
active
047150017
ABSTRACT:
An automatic frequency control circuit having the ability to resolve the frequency of an incoming signal to an extreme level of accuracy and to tolerate amplitude and pulse modulation on the incoming signal is disclosed. Two negative feedback loops are utilized. A coarse adjustment feedback loop resolves the frequency of the incoming signal to within the authority of a fine adjustment feedback loop. A computer is a common element of both loops and makes decisions regarding whether to resolve incoming a signal frequency using the coarse or the fine adjustment loops. Phase differences between a signal derived from the incoming signal and a reference signal are sampled at controllable time intervals apart to determine frequency adjustments within the fine adjustment loop.
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Deem Jake O.
Kassik Ronald W.
Metteer N. Bruce
Gresham Lowell W.
Gruber Felix D.
Motorola Inc.
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