US 11,860,223 B2
Method of generating self-test signals, corresponding circuit and apparatus
Giorgio Maiellaro, Gravina di Catania (IT); Angelo Scuderi, Catania (IT); Angela Bruno, Catania (IT); and Salvatore Scaccianoce, Catania (IT)
Assigned to STMICROELECTRONICS S.r.l., Agrate Brianza (IT)
Filed by STMICROELECTRONICS S.r.l., Agrate Brianza (IT)
Filed on Sep. 20, 2021, as Appl. No. 17/479,510.
Application 17/479,510 is a continuation of application No. 15/691,381, filed on Aug. 30, 2017, granted, now 11,150,294.
Claims priority of application No. 102017000000392 (IT), filed on Jan. 3, 2017.
Prior Publication US 2022/0003814 A1, Jan. 6, 2022
Int. Cl. G01R 31/28 (2006.01); G01S 7/40 (2006.01)
CPC G01R 31/2884 (2013.01) [G01R 31/2832 (2013.01); G01S 7/4056 (2013.01); G01S 7/4069 (2021.05)] 17 Claims
OG exemplary drawing
 
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.