Publications
A fast offset reduction loop based on a bilinear integrator for sensor readout circuits Ghent University
Noise optimization of a resistively-driven ring oscillator for VCO-based ADCs Ghent University
Recently a study of the analog behavior of ring oscillators was presented from the perspective of VCO ADC design [1]. In this study it was shown that the electrical behavior between the two tuning terminals of such a ring oscillator can be modeled by a diode element. The VCO (phase-)noise can be modeled as an equivalent input-referred noise voltage source in series with this diode. Unfortunately, it was found that this input-referred noise was ...
Time-encoding VCO-ADCs for integrated systems-on-chip : principles, architectures and circuits Ghent University
Methodology for readout and ring oscillator optimization toward energy-efficient VCO-based ADCs Ghent University KU Leuven
For the design of ring oscillator-based ADCs, little has been reported on how to optimally co-design the readout scheme and the ring oscillator core towards optimal energy efficiency. This paper describes a methodology to find this optimum for a target SQNR and signal bandwidth, for the case of 1st-order quantization noise shaping. In short, starting from initial assumptions on the VCO, the readout optimization boils down to finding the best VCO ...
A low-noise instrumentation amplifier with built-in anti-aliasing for hall sensors Ghent University
We present a compact, versatile Hall readout system with digital output, fully integrated in 180 nm technology. The core of the system is an instrumentation amplifier architecture that provides inherent anti-aliasing filtering, where the anti-aliasing characteristic is locked into a shape that maximally prevents aliasing to low frequencies. The efficiency for blocking out-of-band white noise is comparable to that of a second-order filter, ...