Frequency modulator

Details Frequency modulator Frequency modulator

1992-06-03

1994-01-25

Mis, David

Modulators

Frequency modulator

Including stabilization or alternatively distortion, noise...

331 17, 331 23, 455208, H03C 300, H03L 708

Patent

active

052819302

ABSTRACT:
A frequency modulator includes a reference frequency oscillator, a voltage controlled oscillator provided with a control input terminal and a modulation input terminal, a frequency divider for dividing an output of the voltage controlled oscillator, a phase comparator for generating an output signal corresponding to a phase difference between an output of the reference frequency oscillator and an output of the divider, a first filter having an input terminal and an output terminal, the input terminal thereof being connected to an output terminal of the phase comparator, while the output terminal thereof being connected to the control input terminal of the voltage controlled oscillator, and a second filter having an input terminal and an output terminal, the input terminal being inputted a modulating signal and the output terminal being connected to the modulation input terminal of the voltage controlled oscillator. The second filter has a lower amplitude characteristics in a low frequency range within a modulation frequency band than that in a high frequency range within the same.

REFERENCES:
patent: 3984831 (1976-10-01), Jones et al.
patent: 4093904 (1978-06-01), Burig et al.
patent: 4286237 (1981-08-01), James
patent: 4417448 (1983-11-01), Horn et al.
patent: 4469993 (1984-09-01), Swanson et al.
patent: 4486797 (1984-12-01), Workman
patent: 4534176 (1985-08-01), Horn et al.
patent: 4546329 (1985-10-01), Unger
patent: 4594536 (1986-06-01), Tamagaki
patent: 4625156 (1986-11-01), Komiya et al.
patent: 4629954 (1986-12-01), Banzai et al.
patent: 4634946 (1987-01-01), Moulds, III et al.
patent: 4675582 (1987-06-01), Hommes et al.
patent: 4707670 (1987-11-01), Dakin
patent: 4733151 (1988-03-01), Butts
patent: 4866404 (1989-09-01), Vandegraaf
patent: 5126699 (1992-06-01), Kabler
patent: 5130676 (1992-07-01), Mutz

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