Axiom IC Twente 
Short Desc. : PWM sigma-delta modulator
Overview :
A PWM sigma-delta modulator is a special type of 1-bit sigma-delta modulator that produces a pulse width modulated (PWM) output signal with a fixed repetition frequency. A fixed repetition frequency makes the output signal insensitive to typical problems associated with (continuous time) sigma-delta converters, such as non-linear inter symbol interference (ISI) and kickback noise on the reference of the DAC.
Features : - 117 dB dynamic range
-120 dBFSA inband noise
- ISI insensitive bit stream
- No signal dependent kick back on DAC reference
- Multi bit advantages with a single bit modulator
- Hardware costs ~ 700 gates
- 0.018 mm2 in 0.14μm CMOS
- Silicon proven
Categories :
Portability :
Type : Soft

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