Oscillators – With frequency adjusting means – Cyclic frequency sweeping means
Patent
1983-02-24
1985-12-24
LaRoche, Eugene R.
Oscillators
With frequency adjusting means
Cyclic frequency sweeping means
328 15, 377 52, H03B 1900
Patent
active
045609608
ABSTRACT:
A digital device generating a frequency-modulated signal. The device comprises a programmable divider which divides the frequency f.sub.H of the clock by a variable integer N supplied by a control circuit. The output pulse signal of the frequency divider initiates the supplying of the next value of N by the control circuit. A shaping circuit brings the pulse signal into the form of a signal whose half-cycles successively have a duration equal to an integer multiple N of the clock period 1/f.sub.H. A supplementary circuit makes it possible to improve the precision of the modulation obtained compared with the desired phase by optionally delaying each half-cycle of the modulated signal by a fraction of the block period. The present invention is applicable to radar and telemetry.
REFERENCES:
patent: 3364437 (1968-01-01), Loposer et al.
patent: 3548320 (1970-12-01), Roberts et al.
patent: 3551826 (1970-12-01), Sepe
patent: 3621403 (1971-11-01), Seiy
patent: 3792378 (1974-02-01), Hughes et al.
patent: 3993957 (1976-11-01), Davenport
patent: 4061973 (1977-12-01), Reimers et al.
patent: 4160958 (1979-07-01), Mims et al.
patent: 4217655 (1980-08-01), Michalski
patent: 4249138 (1981-02-01), Bell
patent: 4286219 (1981-08-01), Gupta
patent: 4296407 (1981-10-01), Minakuchi
Underhill, M. J., "Universal Frequency Synthesizer I.C. System", Phillips Research Laboratories (Redhill) Annual Review, Great Britain, 1978.
Warwick, G. A. et al., "The Frequency Shifting Synthesizer", The Radio and Electronic Engineer, vol. 50, No. 3, pp. 122-126, (Mar. 1980).
LaRoche Eugene R.
Pascal Robert J.
Thomson - CSF
LandOfFree
Digital frequency synthesizer for generating a frequency-modulat does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital frequency synthesizer for generating a frequency-modulat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital frequency synthesizer for generating a frequency-modulat will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1482174