System and method for a high resolution digital input class D amplifier with feedback

摘要

A system and method is disclosed for a digital to analog converter which includes an interpolation filter to up-sample a digital signal, a noise shaping modulator to suppress in-band quantization errors due to digital pulse width modulation and truncation errors, and a hybrid finite impulse response filter/digital to analog converter coupled to a Class D delta-sigma pulse width modulation control loop.