Abstract:This paper presents the design of a low power RC time constant tuning circuit for high linearity 5 th order continuous time Delta Sigma modulator used in LTE-A application with 40MHz bandwidth. This auto-tuning system contains an analog integrator, a voltage comparator, and a digital tuning engine performed by a clock generator, a register and a counter which generate a control word that sets a programmable capacitors bank to obtain an RC time constant accuracy better than ±2%. It resolves process variations i… Show more
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