Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1996-11-20
1998-10-13
Hoff, Marc S.
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
341143, H03M 180
Patent
active
058218920
ABSTRACT:
A digital to analog conversion system (10) includes a noise shaper (14) and a digital to analog converter (16). The digital to analog converter (16) includes a series of weighted taps (32, 102) with switched capacitor circuitries (42, 106, 108). The digital to analog converter (16) also includes an amplifier (36, 120) having an associated integrating capacitor (62, 122, 130). The switched capacitor circuitries (42, 106, 108) include capacitors (46) that are coupled in parallel to integrating capacitors (62, 122, 130) by common busses (34, 114, 115).
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Paul J. Hurst, et al., "Finite Impulse Response Switched-Capacitor Filters for the Delta-Sigma Modulator D/A Interface," IEEE Transactions on Circuits and Systems, vol. 38, No. 11, Nov., 1991, pp. 1391-1397.
David K. Su, et al., "A CMOS Oversampling D/A Converter with a Current-Mode Semi-Digital Reconstruction Filter," Applied Electronics Lab (and supported by the Semiconductor Research Corporation), Date Unknown, pp. 1-30.
Brady III Wade James
Donaldson Richard L.
Hoff Marc S.
Stewart Alan K.
Texas Instruments Incorporated
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