Combined angle demodulator and digitizer

Details Combined angle demodulator and digitizer Combined angle demodulator and digitizer

1993-04-30

1994-11-29

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

H03M 302

Patent

active

053694040

ABSTRACT:
A new technology for simultaneously performing the previously separate functions of analog phase-tracking and A/D conversion, represented by a family of systems referred to as delta-sigma frequency-to-digital converters (.DELTA..SIGMA.FDCs). Each system uses coarse analog phase measurements, quantization noise shaping, and decimation filtering to perform instantaneous frequency-to-digital conversion. Because they operate on instantaneous frequency in the manner that .DELTA..SIGMA. modulators operate on amplitude, they share many of the benefits enjoyed by .DELTA..SIGMA. modulator-based A/D converters such as reduced analog circuit requirements and amenability to VLSI implementation.

REFERENCES:
patent: 5030954 (1991-07-01), Ribner
patent: 5055843 (1991-10-01), Ferguson
R. Douglas Beards et al., "An Oversampling Delta-Sigma Frequency Discriminator," Jan. 1994, IEEE Transactions on Circuits and Systems.

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