Patent ID: 11860223
Assignee: STMICROELECTRONICS S.R.L.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method of testing or calibrating a radio-frequency receiver, comprising:
generating, using a first digital-to-analog converter, a common coarse tuning signal, wherein the common coarse tuning signal is an analog voltage signal;
generating, using a modulator, a first fine-tuning signal;
generating a second fine-tuning signal using a second digital-to-analog converter;
setting, using the common coarse tuning signal and the first fine-tuning signal, a first oscillation frequency of a first oscillator of the radio-frequency receiver;
generating a local oscillator signal of the radio-frequency receiver using the first oscillator;
applying frequency division to the local oscillator signal, producing a frequency-divided signal;
setting, using the common coarse tuning signal, a second oscillation frequency of a second oscillator of the radio-frequency receiver, wherein the common coarse tuning signal is received by the first oscillator and the second oscillator;
generating a radio-frequency test signal of the radio-frequency receiver using the second oscillator;
generating, using the radio-frequency test signal and the frequency-divided signal, a self-test signal of the radio-frequency receiver and
performing diagnostic operations on the radio-frequency receiver using the self-test signal, performing calibration operations on the radio-frequency receiver using the self-test signal, or performing diagnostic and calibration operations on the radio-frequency receiver using the self-test signal.