A Fully Integrated Low-Power Capacitive Sensor Frontend With Automatic Tuning Scheme

Mojarad, Mortaza; Diba, Milad

doi:10.1109/tcsii.2021.3122383

Cited by 3 publications

(1 citation statement)

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“…Fig. 11 illustrates the output for each component of the circuit.The output waveform of the SK filter is close to the Gaussian waveform.The Gaussian waveform is beneficial to improve the readout speed [10]. The output of discriminator is a square wave signal because the time discriminator is essentially a high speed and high resolution voltage comparator.…”

Section: Resultsmentioning

confidence: 99%

Circuit design of a novel front readout circuit for SiC neutron detector with leakage current compensation

Liu,

Fang

et al. 2024

J. Phys.: Conf. Ser.

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Radiation detectors have broad application prospects in environmental radiation monitoring, radiation source identification, biomedical imaging, space exploration, astrophysics, other radiation detection and imaging fields. Among the third generation semiconductors, the properties of 4H-SiC are more suitable for making high-temperature and strong radiation neutron detectors. SiC materials have become a current research hotspot. In this paper a special readout integrated circuit is designed for the extremely weak current pulse signal output by SiC trench neutron detector. A leakage current compensation circuit is designed for the influence of leakage current on charge sensitive amplifier(CSA) output baseline. The noise of CSA output is analyzed and the noise minimization is carried out. The circuit can quickly respond to the input signal and extract the energy and time information. The circuit is designed based on the DB Hitek 0.18μm CMOS process model. The layout design is achieved and the post-simulation is completed. Simulated results show that the equivalent input charge range of the system is about 2fC ∼ 20fC. The charge conversion gain is 88mV/fC. The nonlinear error is within 1.6 %. Moreover, the equivalent noise charge is 22e-. The circuit has the advantages of high gain, high linearity and low noise. Therefore, the circuit can effectively adapt to the characteristics of the charge signal output from SiC trench neutron detectors and amplify the output charge signal.

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Section: Resultsmentioning

confidence: 99%