Delta sigma modulator operating with different power source...

Details Delta sigma modulator operating with different power source... Delta sigma modulator operating with different power source...

2008-05-20

2009-12-22

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07636056

ABSTRACT:
In a delta sigma modulator including first and second integration circuits connected in cascade, each as a component thereof, first and second power source terminals for supplying first and second different power source voltages to the first and second integration circuits are provided. The first power source voltage is supplied to the former-stage first integration circuit having a SNR which is largely affected by the magnitude of the power source voltage. The second power source voltage lower than the first power source voltage is supplied to the latter-stage second integration circuit having a SNR which is not largely affected by the magnitude of the power source voltage.

REFERENCES:
patent: 5153593 (1992-10-01), Walden et al.
patent: 6400297 (2002-06-01), Tucker
patent: 06-283980 (1994-10-01), None
patent: 2004-297165 (2004-10-01), None

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