Continuos Time ΣΔ modulator with efficient gain compensated integrators
VR Gonzalez-Diaz, A Pena-Perez, F Maloberti - Microelectronics Journal, 2016 - Elsevier
This paper presents the design of a second-order continuous time (CT) Σ Δ modulator with
DC gain compensated OTA based integrators. Compared to similar solutions, this novel
technique uses a simple transconductor stage to compensate for the multi-bit feedback DAC
inputs in the modulator. The work details the effective compensation technique by using a
negative transconductance stage that only increases a 17% of the overall Σ Δ power
consumption. The compensated CT modulator is implemented in a 65 nm CMOS process …
DC gain compensated OTA based integrators. Compared to similar solutions, this novel
technique uses a simple transconductor stage to compensate for the multi-bit feedback DAC
inputs in the modulator. The work details the effective compensation technique by using a
negative transconductance stage that only increases a 17% of the overall Σ Δ power
consumption. The compensated CT modulator is implemented in a 65 nm CMOS process …
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