A compact tunable CMOS transconductor with high linearity

Kachare, M.; Lopez-Martin, A.J.; Ramírez-Angulo, J.; Carvajal, R.G.

doi:10.1109/tcsii.2004.842065

Cited by 36 publications

(12 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Linear transconductance circuits introduced in [6,12,13] have output current proportional to square-root of MOS transconductance factor and therefore carrier mobility,…”

Section: A Voltage To Current Squarer(vcsq)mentioning

confidence: 99%

A CMOS relative ultrasound energy measurement circuit with temperature compensation

Postula

2010

2010 IEEE Instrumentation &Amp; Measurement Technology Conference Proceedings

View full text Add to dashboard Cite

A CMOS temperature compensated circuit used in measuring relative ultrasound energy is presented in this paper. The core of the circuit is a temperature compensated voltage to current squarer (VCSQ) and a current integrator. The VCSQ consists of a Linear-Transconductor(LTC) and a current-mode squarer. A current source (dependent on MOS transconductance which is in turn dependent on absolute temperature) is used to bias the current-mode squarer; this provides temperature compensation of the circuit. The circuit is simulated for AMI05 (0.5um) technology using Eldo in Mentor Graphics environment. With the compensation, the VCSQ output drift with temperature is achieved better than 1.98% in the 10~90ºC range for ±1.2V input range. The integrator output drift is achieved for full scale error better than 2.5% in the 10-90ºC range, 1.6% in the 30~90ºC range.

show abstract

“…Linear transconductance circuits introduced in [6,12,13] have output current proportional to square-root of MOS transconductance factor and therefore carrier mobility,…”

Section: A Voltage To Current Squarer(vcsq)mentioning

confidence: 99%

A CMOS relative ultrasound energy measurement circuit with temperature compensation

Postula

2010

2010 IEEE Instrumentation &Amp; Measurement Technology Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…Tunable transconductors are important building blocks employed in many analog circuit applications as in high frequency amplifiers [1], continuous-time filters [2,3] and variable gain amplifiers [4][5][6][7]. Transconductance adjustment is necessary for programming circuit/system parameters, like center frequency and quality factor of filters, for setting the voltage gain of amplifiers or for compensating the tolerances due to process and temperature variations [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A versatile technique for linearly tunable transconductors

Raikos

Vlassis

2010

2010 17th IEEE International Conference on Electronics, Circuits and Systems

View full text Add to dashboard Cite

A versatile technique for linearly tunable CMOS transconductors is introduced in this work. The technique uses a replica circuitry of the active transconductor circuit in master-slave configuration. The presented implementation of the master-slave technique offers the advantages of the linear tuning of the input transconductance over wide range, the stability over PVT comers and the circuit simplicity. The operation and the performance of the implementation have been verified through simulation results using standard 0.18!lm CMOS process.

show abstract

“…Many analog integrated circuits (such as filters, analog-todigital converters …) require linear resistors [1]- [6]. In these circuits programmability is needed to compensate for fabrication tolerances.…”

Section: Introductionmentioning

confidence: 99%

Comparison of programmable linear resistors based on quasi-floating gate MOSFETs

Torralba

Galán

Luján-Martínez

et al. 2008

2008 IEEE International Symposium on Circuits and Systems (ISCAS)

Self Cite

View full text Add to dashboard Cite

Programmable linear resistors are usually implemented using MOS transistors biased in the triode region.Recently a technique, based on quasi-floating-gate transistors, has been introduced to linearize the V-I characteristic of a MOS transistor operating in the ohmic region. In this paper an improved programmable linear resistor also based on quasi-floating gate techniques is presented, which provides a larger conductance than the conventional fixed gatevoltage implementation and features better performance in terms of linearity.

show abstract

A compact tunable CMOS transconductor with high linearity

Cited by 36 publications

References 6 publications

A CMOS relative ultrasound energy measurement circuit with temperature compensation

A CMOS relative ultrasound energy measurement circuit with temperature compensation

A versatile technique for linearly tunable transconductors

Comparison of programmable linear resistors based on quasi-floating gate MOSFETs

Contact Info

Product

Resources

About