A CMOS Peak Stretcher/Peak Detector for Wide Dynamic Range Spectroscopy Applications With 32-μW Power Consumption

A CMOS peak stretcher for pulse-height analysis in spectroscopy applications with an optimized peak-height accuracy and low power consumption, is presented. The proposed circuit has a minimized switch-on transient overshoot, which guarantees a high accuracy also for low-amplitude input pulses. The experimental characterization of the circuit, fabricated in low-noise 0.35-
$\mu \text{m}$
CMOS technology, are presented, showing a peak-height error below 1% across the 10 mV–1 V input range, and a constant switch-on overshoot of around 800
$\mu \text{V}$
. The complete circuit, including the integrated peak detector, is characterized by a ultralow static power consumption of
$\sim 32~\mu \text{W}$
and has a total area occupation of 0.01 mm
²
.