A noise shaping circuit and method for operating the same includes a first
addition module that receives a digital input signal. A first filter
module generates a first filtered output signal based on an output of the
first addition module. A truncation module generates a truncated output
signal based on first filtered output signal. A second filter module
generates a second filtered output signal based on the truncated output
signal. The second filtered output signal is an input to the first
addition module.