Distributed Quantization Noise Transmission Zeros in Cascaded Sigma-Delta Modulators
Patent, Filed 31 Jan 95, patented 2 Jun 98
DEPARTMENT OF THE NAVY WASHINGTON DC
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A series of sigma-delta modulators are connected in a cascaded architecture. Each sigma-delta modulator has a noise transfer function that defines a unique set of quantization noise transmission zeros. A circuit is coupled to the cascaded architecture and has a signal transfer function that is an approximation of the noise transfer function of a first sigma-delta modulator in the series of sigma-delta modulators.
- Electrical and Electronic Equipment