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- W650215856 abstract "This work deals with the study and the realization of Built-In Self-Tests (BIST) for RF VCOs (Voltage Controlled Oscillators) The increasing complexity of RF integrated circuits is creating an obstacle for the correct measurement of the main RF blocks of any transceiver. Some nodes are not accessible, the voltage excursion of the signals is getting lower and lower and high frequency signals cannot be driven off the die without a main degradation. The common test techniques become then very expensive and time consuming. The wafer sort is firstly approached. The proposed solution is the implementation of a BIST strategy able to discriminate between faulty and good circuits during the wafer test. The chosen methodology is the structural test (fault-oriented). A fault coverage campaign is carried out in order to find the quantity to monitor on-chip that maximizes the probability to find all possible physical defects in the VCO. The result of the analysis reveals that the fault coverage is maximized if the peak-to-peak output voltage is monitored. The complete on-chip characterization of the VCO is then addressed, for chip validation and process monitoring. The information that need to be extracted on-chip concern: amplitude of the signal, consumption of the VCO, frequency of oscillation, its conversion gain (voltage-to-frequency) and eventually some information on the phase noise. A silicon demonstrator for wafer sort purposes is implemented using the ST CMOS 65nm process. It includes a 3.5GHz VCO, an LDO, a temperature and supply-voltage independent voltage reference, a peak-to-peak voltage detector and a comparator. The Vpp detector outputs a DC-voltage that is compared to a predefined acceptance boundary. A logic pass/fail signal is output by the BIST. The attention is then turned to the study of the proposed architecture for an on-chip frequency-meter able to measure the RF frequency with high accuracy. Behavioral simulations using VHDL-AMS lead to the conclusion that a TDC (Time-to-Digital Converter) is the best solution for our goal. The road is then opened to the measure of long-time jitter making use of the same TDC." @default.
- W650215856 created "2016-06-24" @default.
- W650215856 creator A5055084189 @default.
- W650215856 date "2010-03-26" @default.
- W650215856 modified "2023-09-26" @default.
- W650215856 title "Contribution to the Built-In Self-Test for RF VCOs" @default.
- W650215856 hasPublicationYear "2010" @default.
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