SPRUJ55D September 2023 – July 2025 AM263P2 , AM263P2-Q1 , AM263P4 , AM263P4-Q1
The Decimation block demodulates the sin and cos signals from the modulated signals received from external Resolver.
Figure 7-159 Selecting Ideal Sampling Point for DemodulationThe RDC oversamples the excitation frequency (programmable samples per Texc), and decides on the ideal sampling time compensating for phase shift that occurs on excitation signal path. The envelope of the sin and cos signals are re-constructed by the values obtained at the sampling that was done at the peaks of the sin and cos input signals. This results in the sin and cos signals which the RDC can further pass on to the Arctan or Track-2 blocks for calculating angles and velocity.