The design of low-voltage, low-power sigma-delta modulators
The design of low-voltage, low-power sigma-delta modulators
High-Gain Class-AB OTA with Low Quiescent Current
Analog Integrated Circuits and Signal Processing
Design of Analog CMOS Integrated Circuits
Design of Analog CMOS Integrated Circuits
CMOS Circuit Design, Layout, and Simulation
CMOS Circuit Design, Layout, and Simulation
Hi-index | 0.00 |
This paper presents a low-power, high-resolution delta-sigma modulator for use in portable devices. The modulator architecture uses a mixed-loop topology, having both feedback and feedforward paths. A new fully differential operational transconductance amplifier is designed that has a higher slew rate and a higher dc gain than conventional amplifiers. A 0.5-mm2 modulator chip is implemented in a standard 0.25-μm CMOS process and operates with a 1.5-V power supply. Measurement results demonstrate a 89-dB dynamic range in a 20-kHz bandwidth with only 457 μW of power consumption.