Frequency modulator having parallel-connected phase adder and os

Details Frequency modulator having parallel-connected phase adder and os Frequency modulator having parallel-connected phase adder and os

1984-02-13

1986-04-22

Grimm, Siegfried H.

Modulators

Amplitude modulator

Nonlinear device controlled by modulating signal

332 23R, 455 42, 455110, H03C 302

Patent

active

045845425

ABSTRACT:
A frequency modulator comprises an oscillator circuit, and a phase adder circuit receiving a signal derived by phase-shifting an oscillation output of the oscillator circuit by 90.degree. and multiplying the phase-shifted signal by a modulating signal, and adding the product, thereby varying an oscillation frequency of the oscillator circuit. The frequency modulator is characterized in that the amplification elements of the phase adder circuit and the oscillator circuit are connected in parallel with respect to a power source.

REFERENCES:
patent: 3815052 (1974-06-01), Watatani et al.
Tateshita et al., "IC for RF Modulator in VCR", Toshiba Review, vol. 36, No. 9, pp. 838-842 (Aug. 1981).

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