Digital Control Readout Integrated Circuit(ROIC) For Gas Sensor
Proposed digital control readout integrated circuit (ROIC) for gas sensor can solve size, power consumption, and other problems with proposed system. Negative charge pump can apply wide range of negative voltage to gate of HEMT device. Amplify signal effectively with complementary structure and chopper technique which ..
Trans-impedance Amplifier for Gas Sensor Analog Front-end
Transimpedance Ampllifier(TIA) amplifies current to voltage. Nested chopper technique, Weak Inversion design allow low noise, low offset structure.
There are four blocks in TIA. First, by using chopping technique, flicker noise and dc offset is removed with modulation and demodulation of signal. In this case, the
High Resolution Analog-Digital Converter for Gas Sensor Interface
This discrete-time 3rd order delta-sigma analog-digital converter is supplied by 3.3V, and shows 16bit resolution. The measured effective number of bits(ENOB) is 15bit. The sampling rate is 500kS/s. Digital control block is added to improve robustness of power variation of amplifier of delta-sigma ADC. High SNDR is ach..
Negative Charge Pump for Gas Sensor
The NCP20 is designed to provide a regulated negative voltage
from a single positive voltage that is origin from LDO’s Output.
The NCP20 operates from a single 2V to 4.4V Voltage and
provides an adjustable output voltage from 1.56V to 7.35V .
Three external capacitors are required: a 1µF input capacitor, 1nF out..
4H-SiC MOSFET-based ESD Protection Device with Improved Snapback using body floating for 70V application
The circuit has effective ESD performance by using MOSFET based Device. Also, the circuit has latch-up immunity as well as small area. The Electrical characteristics of ESD protection circuit are verified by using TLP system and ESD simulator (ESD pulse generator : it can generate the HBM, MM).