Abstract:
A test signal (TS) with given spectral characteristics is injected (201) at input to the quantizer stage (20) of the converter. The same test signal (TS) is subjected to cross-correlation (30) with a given signal (Y(z)) so as to generate (31) coefficients used for filtering (32) the quantization noise converted (27) into digital form. In this way, a compensation signal is obtained which is applied to the output signal of the quantizer stage (20) jointly with a first compensation signal obtained by applying, to the quantization noise converted into digital form, the same transfer function (28) of the converter. In this way a signal is obtained which, in addition to being used as the global output signal (Y(z)) of the converter, is also used for the aforesaid operation of cross-correlation with the test signal (TS).
Abstract:
A wholly digital circuit for generating a signal (Synk) in phase synchronism with a digital input signal (Input) coded according to a biphase modulation, starting from a master clock signal (Ck) of a higher frequency than the maximum switching frequency of the input signal comprise.
Abstract:
Generation of symmetrical temperature compensated reference voltages in mixed type integrated circuits with a superior PSRR includes the use of a voltage-to-current conversion stage of a temperature independent bandgap voltage for producing eventually a differential pair of currents that are input to a pair of transresistance feedback operational amplifiers the feedback resistors of which are integrated in an interlaced form with a resistor employed in said conversion stage.