| 摘要 |
A class D amplifier circuit performs audio signal processing and other signal processing by using a bang-band controller (mp, VREF1, dv) and a noise-shaping feedback network. The bang-bang controller (mp, VREF1, dv) generation of a rectangular waveform that corresponds to changes in a control signal derived from an input analog signal, with the generation of the rectangular waveform being based on a comparison of the control signal with another signal derived from hysteresis associated with an output of a comparator (mp). A filter (Ls, Cs, Rs) filters the rectangular waveform to obtain an amplified output analog signal substantially representative of the input analog signal. The feedback network noise shapes the output analog signal, and feeds back the noise-shaped output analog signal and subtracts if form the input analog signal. |
