This work presents experimental results of a 6 order band-pass continuous-time sigma-delta modulator that uses transmission lines as resonators. It has been implemented in 0.35u SiGe BiCMOS technology. The modulator tolerates two clock cycles of excess loop delay and has similar clock jitter sensitivity than that of an equivalent switched capacitor solution. The ADC operates at a sampling rate ...

This low-power sigma-delta modulator targets the DVB-H requirements and achieves about 10 bit with 6-MHz signal band and a FoM of 0.59 pJ/conversion. The used scheme is a multi-bit third order modulator that, with suitable topological modification, enables using two op-amps and enjoying a swing reduction at the quantizer input. The area of the circuit, fabricated with a 0.18-μm analog CMOS tech...

In this paper, we present a switched-capacitor sigma– delta ( – ) modulator for high resolution applications. In particular, this – modulator is well suited for distributed sensor networks. The circuit, implemented in a double-poly, double-metal 0.6 m CMOS technology, is based on a fourth-order single-loop architecture with a sampling frequency of 256 kHz. The chip consumes 50 mW from a single ...

A common architecture here unifies ordinary scalar deltasigma modulators, vector I/O delta-sigma modulators (including parallel banks of scalar ones), mismatch-shaping DACs, delta-sigma modulators incorporating mismatchshaping DACs in the conventional way, and something new: scalar or vector delta-sigma modulators incorporating spectral shaping of hardware mismatches as a natural and integral p...

This paper reports the transistor-level design of a continuous-time 2-1 MASH sigma delta modulator with digital adaptive tuning of the cancellation logic. The modulator is designed for broadband wireless applications and provides 12 bits of resolution for a 10 MHz signal bandwidth. A direct approach to design the CT MASH modulator is used which reduces the coupling between the MASH stages. The ...

A low power high performance Delta-Sigma modulator for portable measurement applications is presented in this paper. To reduce the power consumption and ensure high performance, a comprehensive system-level design adopting a new method to determine the DC gain value of Operational Transconductance Amplifier (OTA) and considering the effect of 1/f noise is introduced. Besides, a novel power effi...