RADIO-FREQUENCY DEVICE WITH NULL OR QUASI-NULL INTERMEDIATE FREQUENCY MINIMIZING INTERFERING FREQUENCY MODULATION APPLIED TO AN INTEGRATED LOCAL OSCILLATOR

摘要

The invention concerns a device comprising on a common electronic chip frequency translation means (MX) connected to a main oscillator (VCOP). The main oscillator (VCOP) is incorporated in a main phase locked loop (PLL2) whereof the reference frequency is supplied by a voltage-regulated auxiliary oscillator (VCOA), itself incorporated in an auxiliary phase locked loop (PLL1) whereof the reference frequency is lower than the auxiliary oscillator frequency. The reference frequency (SRFP) of the main loop is lower than the main oscillator output frequency, higher than 10 times the frequency spacing of the channels referred to the main oscillator output frequency, and distant by a whole multiple from reception or transmission frequency of at least the main loop cutoff frequency.