Architecture for Low voltage, High Speed, Switched-Capacitor Sigma-Delta modulator.

Discussion in 'Cadence' started by Boki, Oct 29, 2003.

  1. Boki

    Boki Guest

    Hi, All:

    For low-voltage (1-Volt), low power (nW), high speed ( IF > 10MHz),
    switched-capacitor sigma-delta modulator design,

    1. Use Switched opamp for solve low voltage.
    2. Double sampled feed into integrator for high speed.
    3. Pseudo n path on single opamp for low power.


    Question:

    1. Switched Opamp (SO) increases power consumption in every critical
    switch, double sampled, double power.

    2. Does it is possible to accomplish bandpass sigma delta modulator
    using only ONE opamp (Integrator) working in Pseudo n path
    architecture.

    Please give any suggestion or comment, thanks a lot!

    Boki.
     
    Boki, Oct 29, 2003
    #1
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