Telecommunications – Transmitter – Angle modulation
Patent
1996-05-30
1998-08-04
Chin, Tommy P.
Telecommunications
Transmitter
Angle modulation
455113, 455118, 455119, 455110, 332127, 331 2, H03L 700
Patent
active
057909423
ABSTRACT:
A first phase-locked loop (PLL) includes a first integrated voltage-controlled oscillator (VCO) whose output signal has a frequency modulated by an input signal of the device about a multiple of a reference frequency. A second PLL includes a second integrated VCO and frequency transposition means. The transposition circuit receive the output signal of the second VCO and a transposition signal having a non-modulated frequency. The second PLL addresses to the second VCO a control signal capable of aligning the frequency of the output signal of the transposition circuit with the frequency of the first VCO. The output signal of the second VCO forms the frequency modulation transmission signal produced by the device.
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Le Corre Jean-Luc
Robbe Michel
Chin Tommy P.
Le Vu
Matra Communication
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