amriths04
Full Member level 5
class d circuit
in a sigma delta loop class D amp the quantizer noise (which is white) is pushed out of band by noise shaping.on the other hand a pwm signal does not have distortion in the in-band. and closing the loop further helps improve linearity (due to non-idealities).hence is not the pwm loop inherently more linear than delta sigma loop?
if the above is true, why at all did people adopt sigma-delta loop on class D amps?
what are the main differences between a PWM feedback loop and a DELTA-SIGMA feedback loop for a class D amp. which is inherently more linear?
in a sigma delta loop class D amp the quantizer noise (which is white) is pushed out of band by noise shaping.on the other hand a pwm signal does not have distortion in the in-band. and closing the loop further helps improve linearity (due to non-idealities).hence is not the pwm loop inherently more linear than delta sigma loop?
if the above is true, why at all did people adopt sigma-delta loop on class D amps?
what are the main differences between a PWM feedback loop and a DELTA-SIGMA feedback loop for a class D amp. which is inherently more linear?