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This paper presents two methods to reduce power consumption of switched capacitor (SC) integrators in sigma-delta analog to digital converters. The proposed two methods are based on the passive charge re-distribution technique, injecting charge into the output of the first integrator. The injected charge can be attained by a continuous function of the input voltage and feedback, or by quantizing the...
This paper presents a method to save the power consumption of switched capacitor (SC) integrators in sigma-delta analog-to-digital converters (ADCs). It is based on open-loop charge injection in the output of the first integrator. The injected charge is a continuous function of the input voltage and feedback, the idea is to minimize the initial transient voltage in the input of the first amplifier...
Slew rate limitation is a major cause of nonlinear settling error in switched capacitor circuits. In this paper we present a simple charge-sharing solution, by pre-charging the load capacitors properly, the initial input voltage step is minimized. The technique is simulated in a SC pipeline residue amplifier, and it provides 5.4 dB (nearly 1 bit) improvement in the settling accuracy with no additional...
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