Analog to digital converter employing delta-sigma modulation

Details Analog to digital converter employing delta-sigma modulation Analog to digital converter employing delta-sigma modulation

1987-11-16

1989-09-12

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

341155, 375 28, H03M 302

Patent

active

048664421

ABSTRACT:
Analog-to-digital conversion apparatus provides high-resolution conversion of input signals. Summing elements combine an analog input signal and an analog offset signal to generate a residual signal. A first integrator element integrates the residual signal, and a second integrator processes the first integrator output signal to produce a second integrator output signal. A comparator processes the first and second integrator output signals to produce a digital offset signal, the second integrator output signal is converted into a digital representation, and output elements process the digital offset signal and second integrator output signal to produce a digital representation of the analog input signal.

REFERENCES:
patent: 3825831 (1974-07-01), Ishiguro
patent: 4313204 (1982-01-01), DeFreitas
patent: 4509037 (1985-04-01), Harris
patent: 4518948 (1985-05-01), VanRoessel
patent: 4542354 (1985-09-01), Robinton
patent: 4573037 (1986-02-01), Robinton
patent: 4588981 (1986-05-01), Senn
Classen et al., "Signal Processing Method for Improving the Dynamic Range of A/D and D/A Converters," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-28, No. 5, Oct. 1980, pp. 529-537.

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