Patent attributes
Systems and methods for low power sample rate conversion are based on a noise shaping technique. A sample rate conversion circuit includes a clock synchronization circuit configured to receive an input sample sequence at a first sample rate and generate a valid sample sequence that is sampled at a second sample rate different from the first sample rate. The valid sample sequence may include valid samples from a registered sequence sampled at an oversampled rate greater than the first sample rate with invalid samples in the registered sequence being excluded from the valid sample sequence. The sample rate conversion circuit also includes a noise shaping circuit coupled to the clock synchronization circuit and configured to encode the valid sample sequence into a noise-shaped output sequence at the second sample rate by suppressing quantization noise from the valid sample sequence.
