Modulators – Frequency modulator
Patent
1989-06-14
1990-11-27
Grimm, Siegfried H.
Modulators
Frequency modulator
332119, 455110, H03C 300
Patent
active
049739239
ABSTRACT:
In a circuit arrangement for the generation of I,Q waveforms, an incoming analog signal controls a voltage-controlled oscillator (1), whose output signal (U1) is frequency-modulated. This signal (U1) is mixed with unmodulated signals by using mixers that are switches (6,7). The signals controlling the switches are either modulated or oscillator-generated rectangular waves. The circuit arrangement can be implemented as an integrated circuit.
REFERENCES:
patent: 4253067 (1981-02-01), Caples et al.
patent: 4540958 (1985-09-01), Neyens et al.
patent: 4599743 (1986-07-01), Reed
Grimm Siegfried H.
Nokia-Mobira Oy
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