Low-voltage Delta-sigma Research Articles

Low voltage Delta-Sigma Modulator with full range and unidirectional output

Low voltage Delta-Sigma Modulator with full range and unidirectional output

DTMOS Technique for Low-Voltage Analog Circuits

In this paper, the application of dynamic threshold MOS (DTMOS) technique for low-voltage analog circuits is explored. The body terminal of PMOS transistors in bulk CMOS technology can be used as the forth terminal to enhance the performance of low-voltage analog circuits. To show the effectiveness of this technique, we have designed a continuous time common mode feedback (CMFB) circuit for a sub 1-V opamp and a new sub 1-V, 1-bit quantizer. A 0.8-V opamp with embedded CMFB and a 0.8-V, 1-bit quantizer for low-voltage DeltaSigma modulators are implemented in 0.18-mum CMOS technology. The simulation results as well as the measurement data of these blocks are presented in this paper