Device for adjusting the locking of an injection locked frequency multiplier

Device for adjusting the locking of an injection locked frequency multiplier, including at least:

• one first input configured for receiving a first signal of frequency f1 intended to be applied as input of the injection locked frequency multiplier, and a second input configured for receiving a second signal of frequency f2 intended to be outputted by the injection locked frequency multiplier;
• one sub-sampler configured for carrying out a sub-sampling of the second signal by the first signal or by another signal of frequency fs equal to an integer multiple of the frequency f1 and less than the frequency f2;
• one control circuit configured for:
• receiving as input a third signal obtained as output of the sub-sampler and corresponding to the second signal sub-sampled by the first signal or by the signal of frequency fs, then
• determining that the injection locked frequency multiplier is locked on a frequency equal to a multiple of the frequency f1 when the third signal is continuous and when the injection locked frequency multiplier is not locked on a frequency equal to a multiple of the frequency f1 when the third signal varies over time, then
• outputting a fourth signal the value of which is representative of the locking or not of the injection locked frequency multiplier on a frequency corresponding to a multiple of the frequency f1;
• and wherein the control circuit comprises an integrator filter configured for carrying out a high-pass or pass-band filtering of the third signal, the injection locked frequency multiplier being considered as locked on a frequency corresponding to a multiple of the frequency f1 when the signal obtained by said high-pass or pass-band filtering is substantially zero.