Improved temperature compensation of OTAs

Karybakas, C. A.; Kosmatopoulos, C.; Laopoulos, T.

doi:10.1049/el:19920482

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…This makes the amplifier bias-current stabilization against temperature drifts very important in practical applications, particularly under varying environmental conditions. Possible solutions for this problem include temperature compensation of the OTAs [12,13] and phase-lock tOo-Stabilization techniques [14][15][16][17]. Although the later is more suited for relatively complicated systems, it has the advantage of stabilizing system performance not only against temperature variations, but also against variations in power-supply voltage and aging [18].…”

Section: Resultsmentioning

confidence: 99%

New Minimum‐Component OTA‐Based Sinusoidal Oscillators

Abuelma’atti

Khan

1995

Active and Passive Electronic Components

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Using a general oscillator structure, new oscillator circuits are systematically derived. These oscillator circuits use two operational transconductance amplifiers (OTAs) and one externally connected passive element, exploiting the inherent zeros of the OTAs to advantage. The feasibility of obtaining oscillation using only two OTAs without externally connected passive elements is investigated. Experimental results are included.

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Section: Resultsmentioning

confidence: 99%

New Minimum‐Component OTA‐Based Sinusoidal Oscillators

Abuelma’atti

Khan

1995

Active and Passive Electronic Components

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“…This error can be reduced by increasing the value of the bias current I B1 . In addition, the temperature dependence of the transconductance of an OTA can be compensated using a technique proposed in the literature [5]. However, this circuit scheme has a large configuration and is uneconomical for implementation.…”

Section: Circuit Performancesmentioning

confidence: 99%

OTA-Based Sine-to-Triangular Wave Converter

Riewruja

Kaewpoonsuk

2006

Circuits Syst Signal Process

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A sine-to-triangular wave converter based on operational transconductance amplifiers (OTAs) is proposed in this paper. The realization method exploits a hyperbolic tangent behavior of an OTA to convert from a sine wave to a triangular wave. The proposed circuit provides a simple configuration and employs only OTAs as the active elements. This scheme can be operated in both a voltage-controlled mode and a current-controlled mode. The performances of the proposed circuit are discussed in detail and confirmed by the experimental results.

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“…However, OTA's major disadvantage is the fact that its gain (g m ) is rather dependent on the absolute temperature. There is a need for temperature compensation of OTA based circuits [19].…”

Section: Introductionmentioning

confidence: 99%

Lossless inductance simulation and voltage-mode universal biquadratic filter with one input and five outputs using DVCCs

Horng

2009

Analog Integr Circ Sig Process

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A lossless floating inductance has been simulated using two differential voltage current conveyors, two resistors and one grounded capacitor. The proposed floating inductance needs not component matching condition. Base on the proposed floating inductance as building block, a new voltage-mode universal biquadratic filter with one input and five outputs can be obtained. The proposed universal biquad uses two differential voltage current conveyors, three resistors and two grounded capacitors. All standard filter functions; highpass, bandpass, lowpass, notch and allpass can be obtained, simultaneously, without changing the passive elements. The proposed universal biquad has the features of using only grounded capacitors and orthogonal controllable of resonance angular frequency and quality factor.

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Improved temperature compensation of OTAs

Cited by 7 publications

References 3 publications

New Minimum‐Component OTA‐Based Sinusoidal Oscillators

New Minimum‐Component OTA‐Based Sinusoidal Oscillators

OTA-Based Sine-to-Triangular Wave Converter

Lossless inductance simulation and voltage-mode universal biquadratic filter with one input and five outputs using DVCCs

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