Peter Bogner

On the power consumption of analog to digital converters

We attempt to formulate a theory for the power consumption of AD converters. The theory is based on first principles circuit theory and on the assumption of full digital error correction. The theory is compared to actual experimental converters

A digitally controlled DC-DC converter for SoC in 28nm CMOS

Battery operation in mobile applications needs power efficient DC-DC converters which are able to handle battery voltages up to 5.5V. Normally, these DC-DC converters are built in special technologies. For decreased footprint and chip count of the overall system, a system-on-chip solution on modern CMOS technology with core supply voltages around 1V is preferred. The presented DC-DC buck converter generates 0.9 to 1.8V at output currents up to 500mA from a battery voltage of 2.4 to 5.5V with high efficiency in a high-k 28nm metal-gate CMOS technology.

A high signal swing Class AB earpiece amplifier in 65nm CMOS Technology

This paper describes a new circuit solution to implement a high signal swing amplifier for driving a low resistive and high capacitive load. The amplifier is dedicated to operate at a supply voltage of 2.5V driving an earpiece device of a mobile phone by the usage of a standard digital single gate oxide transistor in a 65nm technology. The high linearity is achieved by using a three stage amplifier. To handle the high voltage of 2.5 V with the 1.2 V transistor an innovative transistor cascoding is implemented. A class AB output stage is chosen to ensure a low power consumption. A prototype is realized in a low power 65 nm CMOS technology. The measured THD is lower than 0.04% at the desired audio band of 20kHz

A 14b 100MS/s digitally self-calibrated pipelined ADC in 0.13/spl mu/m CMOS

A 14b multi-bit-per-stage pipelined ADC is implemented in a 0.13mum digital CMOS process. The gain and matching errors of the analog circuitry are compensated by a digital calibration scheme that allows the usage of a low-gain op-amp. A low power consumption has been reached by introducing a charge compensation scheme