Registers – Coded record sensors – Particular sensor structure
Patent
1980-10-14
1982-12-21
Heyman, John S.
Registers
Coded record sensors
Particular sensor structure
235 92PE, 235 92FQ, 340347M, 328 61, H03L 718
Patent
active
043652018
ABSTRACT:
A frequency synthesizer of the type which selects pulses from a clock pulse generator (21) to provide a lower output frequency Fo, the synthesizer including an accumulator (22) of the type which, for each input pulse thereto, adds a preselected increment Y to the accumulated value in the accumulator and gives an overflow pulse each time an accumulated value C (where C is equal to or greater than Y) is reached or exceeded and leaves any excess (residue) in the accumulator. In accordance with the invention, adjustable delay means are coupled to the accumulator output such that each output pulse is delayed by an amount which depends on the residue in the accumulator thereby providing a spectrally pure output frequency.
REFERENCES:
patent: 4132871 (1979-01-01), Lake
patent: 4296407 (1981-10-01), Minakuchi
patent: 4303837 (1981-12-01), Ansaldi et al.
Scott Richard I. H.
Underhill Michael J.
Briody Thomas A.
Goodman Edward W.
Heyman John S.
Streeter William J.
U.S. Philips Corporation
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