An amplifier includes first and second stages. The first stage includes an input node for receiving an analog input signal, an analog digital converter for converting the analog input signal to a digital input signal, and a first switching circuit for outputting a first analog intermediate output signal in response to receiving a digital pulse width modulated signal that is based on the digital input signal. The second stage is configured to receive a pulse width modulation quantization error of the first stage, scale the pulse width modulation quantization error of the first stage by a gain factor to produce a scaled pulse width modulation quantization error of the first stage, and output a second analog intermediate output signal based on the scaled pulse width modulation quantization error of the first stage. A summation circuit combines the first and second analog intermediate output signals to generate an amplified output signal.