| 摘要 |
A digital microphone has a transducer for generating an analog signal representing an acoustic signal, and a single bit sigma-delta modulator analog-to-digital converter of order greater than one for generating a digital output signal from said analog signal in the form of a sigma-delta modulated bit stream at an oversampled rate. The digital microphone avoids the need to include digital decimation and filtering circuits within the microphone housing and thus lends itself better to integration technologies. |
