Two-Stage Differential Charge and Transresistance Amplifiers

Massarotto, Marco; Carlosena, A.; Lopez-Martin, A.J.

doi:10.1109/tim.2007.909498

Cited by 31 publications

(10 citation statements)

References 2 publications

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“…The implementation of the integrated version of the sensor interface has some slight design differences from the discrete version, in order to improve the silicon area consumption. An alternative differential transimpedance amplifier configuration [ 37 ] was selected for the integrated implementation instead of the classic configuration that consists of one separate amplification channel for each set of electrodes since it provides differential-to-single-ended signal amplification, employing only one operational amplifier and, therefore, decreasing the power consumption, the silicon real estate, and the need for an op-amp subtractor, as well as the need for a second bandpass filter, is avoided. The relation for the gain the transimpedance amplifier provides, is:

…”

Section: Optimized Ic Sensor Interfacementioning

confidence: 99%

Analog Sensor Interface for Field Mill Sensors in Atmospheric Applications

Agorastou

Noulis

Siskos

2022

Sensors

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An overview of the electric field mill sensor specifications in applications related to the measurement of the atmospheric electric field was conducted. The different design approaches of the field mill sensor interface are presented and analyzed, while the sensitivity-related parameters of a field mill are discussed. The design of a non-complex analog sensor interface that can be employed for the measurement of the electric field in both fair and foul weather conditions, such as thunderstorms, is implemented using discrete components for experimental validation and is optimized in an integrated version in terms of noise and power consumption. Advanced noise simulations are conducted in a 180 nm CMOS process (XH018 XFAB). The energy-autonomous operation of the sensor for extended periods of time is made feasible due to the low power consumption of the front-end circuitry (165 μW at 3 V) as well as the proposed intermittent style of operation of the motor. The total sensing system is low power, and its realization is simple and cost-effective, while also offering adequate sensitivity (45 mV/kV/m), making it comparable to the existing works.

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…”

Section: Optimized Ic Sensor Interfacementioning

confidence: 99%

Analog Sensor Interface for Field Mill Sensors in Atmospheric Applications

Agorastou

Noulis

Siskos

2022

Sensors

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“…Regarding the influence of amplifiers voltage offsets, a routine analysis 21 shows a distinct behavior of even and odd topologies. This is not strange due to the different role that the two amplifiers play in the multiplicative effect of resistance R a , which has a reflection in the way offsets transmit to the output.…”

Section: Comparative Analysis Of the Six Topologiesmentioning

confidence: 99%

A family of AC amplifiers for ultra‐low frequency operation

Martincorena-Arraiza

Carlosena

Blas

et al. 2021

Circuit Theory & Apps

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A family of capacitively coupled alternating current (AC) amplifiers featuring ultra-low (below 1 Hz) corner frequency is presented. This is achieved by using high-gain devices which actively boost feedback resistance and thus reduce corner frequency. This procedure is often termed, though with a different purpose, as "bootstrapping." The proposed architectures are very general and admit several possible practical implementations. To demonstrate their usefulness, the circuits are implemented with two operational amplifiers (OA), but other active devices such as operational transconductance amplifiers (OTAs) can be alternatively used. All circuits have been theoretically analyzed, extensively simulated and measured, exhibiting high-pass cutoff frequencies as low as 30 mHz.

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“…2 has been used for the experimental characterization of the ultrasonic channel. The classical charge amplifier topology based on a high input impedance (FET input) opamp and a feedback RC network has been selected to perform the charge-voltage conversion at the output [29]. A transresistance amplifier has been connected to the negative terminal of the transmitter PT for sensing the current through the input PT for characterization purposes.…”

Section: Channel Characterizationmentioning

confidence: 99%

“…It is based on the Analog Devices AD823 FET-input opamp mounted on a prototype board and supplied by the FPGA 3.3 V supply voltage. A pseudo-differential configuration using two amplifiers has been employed [29]. This configuration doubles the sensitivity and enhances the rejection of common mode parasitic signals, at the expense of also doubling power consumption.…”

Section: A Amplitude Tracking Using a Digitally Programmable Charge mentioning

confidence: 99%