Current sensing readout is one of the most frequent techniques used in biosensing due to
the charge-transfer phenomena occurring at solid-liquid interfaces. The development of …

This paper presents a voltage-controlled oscillator (VCO) based current to digital converter
for sensor readout applications. Second order noise shaping of the quantization error is …

CMOS current readout is a critical circuit block for various applications like bio-sensing. This
paper presents an overview of CMOS current readout techniques and analyze their merits …

We present an image sensor incorporating angle-selective gratings for resolution
enhancement in contact imaging applications. Optical structures designed in the CMOS …

This paper presents an amplifier-less and digital-intensive current-to-digital converter for ion-
sensitive FET sensors. Capacitance on the input node is utilized as a residue accumulator …

Radiation detectors need front-end electronics capable of measuring currents over a large
dynamic range with femtoampere sensitivity. The goal of this work is to find an alternative to …

A continuous-time (CT) second-order ΔΣ current-to-digital converter (CDC) is presented in
this paper. The proposed CDC uses two current-controlled ring oscillators as phase-domain …

This article presents a low-power, high-resolution, high dynamic range (DR) current-mode
direct-to-digital converter (CM-DDC) using a noise-shaping triple-slope quantizer. Both …

Noninvasive optical sensing techniques, such as photoplethysmography (PPG) and
functional near-infrared spectroscopy (fNIRS), provide great user comfort and obtain rich …

A photocurrent sensor with a wide dynamic range (DR) and high resolution is crucial in
many biosensing applications 1–4. In particular, the implantable recording device for …