Double rate oversampled interpolative modulators for analog-to-d

Details Double rate oversampled interpolative modulators for analog-to-d Double rate oversampled interpolative modulators for analog-to-d

1990-09-17

1991-07-09

Pellinen, A. D.

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

341143, 375 29, 375 33, H03M 302

Patent

active

050309544

ABSTRACT:
A circuit transformation that doubles the effective sampling rate of any switched capacitor oversampled, interpolative modulator, regardless of its order, employs, in each integrator of the modulator, a second input capacitor and switches that operate on alternate clock phases. In addition, two quantizers, instead of one, are employed in the network and are operated on opposite clock phases. Alternatively, the quantizers can be operated at twice the normal rate if feasible for the particular circuit. The effective operating rate is thereby doubled without any increase in clock rate or circuit speed requirements, resulting in improved analog-to-digital resolution or conversion rate.

REFERENCES:
patent: 4574250 (1986-03-01), Senderowicz
patent: 4633223 (1986-12-01), Senderowicz
patent: 4633425 (1986-12-01), Senderowicz
patent: 4857928 (1989-08-01), Gailus et al.
patent: 4862169 (1989-08-01), Van Bavel et al.
patent: 4876542 (1989-10-01), Van Bavel et al.
patent: 4876543 (1989-10-01), Van Bavel
patent: 4896156 (1990-01-01), Garverick
patent: 4920544 (1990-03-01), Endo et al.
patent: 4939516 (1990-07-01), Early
patent: 4972436 (1990-11-01), Halim et al.
J. C. Candy, "A Use of Double Integration in Sigma Delta Modulation", IEEE Transactions on Communications, vol. COM-3, No. 3, Mar. 1985, pp. 249-258.
J. C. Candy et al., "Using Triangularly Weighted Interpolation to Get 13-Bit PCM from a Sigma-Delta Modulator", IEEE Transactions on Communications, Nov. 1976, pp. 1268-1275.
J. C. Candy, "A Use of Limit Cycle Oscillations to Obtain Robust Analog-to-Digital Converters", IEEE Transactions on Communications, vol. COM-22, No. 3, Mar. 1974, pp. 298-305.
R. Gregorian et al., "Analog MOS Integrated Circuits for Signal Processing", Wiley, New York (1986), pp. 500-504.
T. C. Choi et al., "Considerations for High-Frequency Switched-Capacitor Ladder Filters", IEEE Transactions on Circuits and Systems, vol. CAS-27, No. 6, Jun. 1989, pp. 545-552.

Affiliated with

Also associated with

Rating

Double rate oversampled interpolative modulators for analog-to-d does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Double rate oversampled interpolative modulators for analog-to-d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Double rate oversampled interpolative modulators for analog-to-d will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-620927