Description
In this thesis a picture element (pixel) for the ATLAS pixel detector was
developed using a commercially available 150nm high-voltage CMOS technology.
The basics of HVCMOS particle sensors, concrete design considerations and
radiation induced damages were discussed. The time walk and noise were
simulated using standard industry tools from Cadence and the device models
from the Foundry.
Additionally a current output digital-to-analog converter (DAC) was designed
in a binary-weighted topology, to generate the reference bias current for the
pixels. The non-linearity effects of DACs caused by transistor mismatch were
analysed using Monte Carlo simulation to allow predictions about the
conversion errors.