Results 211 to 220 of about 7,231 (240)
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New Operational Transconductance Amplifiers using current boosting
2012 IEEE 55th International Midwest Symposium on Circuits and Systems (MWSCAS), 2012New techniques for Class-AB Operational Transconductance Amplifiers (OTAs) are presented. These new techniques are two topologies based on current boosting in class-AB stage which achieve considerable improvement of Slew Rate and Gain-Bandwidth while maintaining the same power consumption as the conventional design.
Mehdi Noormohammadi +2 more
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Active rc filters using an operational transconductance amplifier and an operational amplifier
International Journal of Circuit Theory and Applications, 1980AbstractAn operational transconductance amplifier (OTA) and an operational amplifier are being used to synthesize various second‐order cascadable active RC filters. Two of them are active R filters. The filters are studied both theoretically and experimentally and are found to have low sensitivity to variations in their component values.
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Bessel‐like compensation of three‐stage operational transconductance amplifiers
International Journal of Circuit Theory and Applications, 2017AbstractIn this paper, we introduce a simple and well‐defined approach for the design of fast settling amplifiers suitable for switched‐capacitor circuits and characterized by low capacitive loads, in the order of few pico‐farad. In the specific, the design is based on a new Bessel‐like compensation that sets the phase of the closed‐loop amplifier to ...
Giustolisi, Gianluca, Palumbo, Gaetano
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Current-controlled multivibrators with operational transconductance amplifiers
International Journal of Electronics, 1991Abstract A current-controlled multivibrator using operational transconductance amplifiers (OTAs) is proposed and the circuit operation is described. The frequency of oscillations ƒo is calculated (both bipolar and MOS OTAs are treated). The circuit allows operation with a low voltage power supply.
I. M. FILANOVSKY, I. G. FINVERS
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Noise optimization in operational transconductance amplifier filters
IEEE International Symposium on Circuits and Systems, 2003The noise performances of a class of biquadratic time-continuous filters based on the use of operational transconductance amplifiers and capacitors (OTA-C filters) are investigated and compared in terms of the filter parameters and topologies. Both white and 1/f noise are included in modeling the noise characteristics of a real OTA, and expressions for
BRAMBILLA, ANGELO MAURIZIO +3 more
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Operational Transconductance Amplifier Based Two-Stage Differential Charge Amplifiers
2010A novel approach to the design of high-performance operational-amplifier-based differential charge amplifiers is proposed. It is based on a two-stage topology: The first stage performs a differential measurement to single ended signal conversion, providing a common mode rejection that only depends on the matching between two resistors; the second stage
Dinesh B. Bhoyar, Bharati Y. Masram
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Operational Transconductance Amplifier-C Filters
2003In this chapter, Active filters using only OTAs and capacitors are described. Cascade design of OTA-C filters needs high input impedance for each block, as well as first-order and second-order blocks. Various structures that can be used to implement these will be discussed in detail. The subject of ladder filter simulation using component simulation as
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Astable bridge multivibrator with operational transconductance amplifier
International Journal of Electronics, 1992Abstract A bridge multivibrator using operational transconductance amplifier (OTA) is proposed and the circuit operation is described. The oscillation period T is calculated (both bipolar and MOS OTA are treated). External voltage clamping is not required to obtain symmetrical oscillations with 50% duty cycle.
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Fully Differential Operational Transconductance Amplifiers (OTAs)
2007An amplifier is often a fundamental building block of an analog circuit. Fully differential circuits are widely used due to their large available signal swing, and superior supply and substrate interference immunity. In this chapter we will develop the design of fully differential amplifiers, which will be primary building blocks for subsequent designs
Shouri Chatterjee +4 more
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