Detail publikace

The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications

PROKOP, R. ŠOTNER, R. KLEDROWETZ, V.

Originální název

The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This paper introduces a new current-controlled current-amplifier suitable for precise measurement applications. This amplifier was developed with strong emphasis on linearity leading to low total harmonic distortion (THD) of the output signal, and on linearity of the gain control. The presented circuit is characterized by low input and high output impedances. Current consumption is significantly smaller than with conventional quadratic current multipliers and is comparable in order to the maximum processed input current, which is +/- 200 mu A. This circuit is supposed to be used in many sensor applications, as well as a precise current multiplier for general analog current signal processing. The presented amplifier (current multiplier) was designed by an uncommon topology based on linear sub-blocks using MOS transistors working in their linear region. The described circuit was designed and fabricated in a C035 I3T25 0.35-mu m ON Semiconductor process because of the demand of the intended application for higher supply voltage. Nevertheless, the topology is suitable also for modern smaller CMOS technologies and lower supply voltages. The performance of the circuit was verified by laboratory measurement with parameters comparable to the Cadence simulation results and presented here.

Klíčová slova

current amplifier; current controlled gain; accuracy; linearity; CMOS; electronic control; sensor signal processing

Autoři

PROKOP, R.; ŠOTNER, R.; KLEDROWETZ, V.

Vydáno

18. 8. 2020

Nakladatel

MDPI

Místo

Basel, Switzerland

ISSN

1424-8220

Periodikum

SENSORS

Ročník

20

Číslo

16

Stát

Švýcarská konfederace

Strany od

1

Strany do

23

Strany počet

23

URL

https://www.mdpi.com/1424-8220/20/16/4653/htm

Plný text v Digitální knihovně

http://hdl.handle.net/11012/195244

BibTex

@article{BUT165501,
  author="Roman {Prokop} and Roman {Šotner} and Vilém {Kledrowetz}",
  title="The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications",
  journal="SENSORS",
  year="2020",
  volume="20",
  number="16",
  pages="1--23",
  doi="10.3390/s20164653",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/20/16/4653/htm"
}