Architecture and circuit engineering of precision differential amplifiers with increased common-mode rejection

Prokopenko, N. N.; Budyakov, A.S.; Kryukov, S. V.

doi:10.1109/eccsc.2008.4611679

Cited by 3 publications

(5 citation statements)

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“…Roughly speaking we can consider that the difference 2 1. cb ΔV in 1 V creates (for the absolutely identical transistors) the difference of their coefficients of the self-feedback, reaching 25÷50 % from the absolute value of μ. We mean that in case (for SiGe and other technologies): (9)(10) it follows that to minimize the systematic component of CMRR 1 , connected with the coefficient of selffeedback μ 1 , μ 2 , it is necessary to choose identical static modes Q1and Q2. It is especially actual in the stages with the current mirrors ( Fig.1a), where there is practically always a difference…”

Section: Inclusionmentioning

confidence: 99%

“…The significant difference of DDA from classical op-amps, where the common-mode rejection is analyzed well enough [8,9], is a presence of several differential inputs, in which various levels of the input common-mode voltages can be observed [2,4,5]. As a rule, these inputs can be connected with the different input signal sources.…”

Section: Inclusionmentioning

confidence: 99%

“…This paper considers a new calculation method of the DDA errors from the several input common-mode voltages on different inputs (1-2, 3-4) of DDA. Also the circuit and parametric solutions for DDAs input stages, which increase the CMRR are proposed [10,8,11,7,12,13,14,15,9]. The presence of the common-mode voltages 2 / ) (…”

Section: Inclusionmentioning

confidence: 99%

See 2 more Smart Citations

The method of the errors calculation from the input common-mode signal in the analog interfaces based on the differential difference operational amplifiers and the ways of their decrease

Prokopenko

Pakhomov

Bugakova

et al. 2016

2016 International Siberian Conference on Control and Communications (SIBCON)

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The article suggests a new method of the errors evaluation from the several common-mode signals in the differential difference operational amplifiers (DDAs), based on the theory of autonomous multiport circuit. These errors of DDA in its main connection circuits can be described by feeding a special current autonomous parameter to the classical equivalent circuit of DDA. This parameter is connected with the highimpedance node of DDA and depends on the level of the common-mode components in the inputs of some input differential stages and also on the parameters spread of the elements.The paper shows that in DDAs the common-mode rejection ratio (CMRR) significantly worsens in comparison with classical op-amp. The parametric and circuitry methods of CMRR increase in the DDAs based on the inherent compensation of parasitic impedances are considered.

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Section: Inclusionmentioning

confidence: 99%

Section: Inclusionmentioning

confidence: 99%

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The method of the errors calculation from the input common-mode signal in the analog interfaces based on the differential difference operational amplifiers and the ways of their decrease

Prokopenko

Pakhomov

Bugakova

et al. 2016

2016 International Siberian Conference on Control and Communications (SIBCON)

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“…For operational amplifiers with a classical architecture (Figure 1), the SR in large-signal mode is estimated using the equation [27,28]…”

Section: Energy Limitations For Input Stages Op-amp With Maximum Speedmentioning

confidence: 99%

“…Thus, the slope of the gain of the input stage of a high-speed Op-Amp (the slope of its transit characteristic) cannot be selected without taking into account the thermal effects in the microcircuit. However, this parameter (y21) of the input stage has a significant impact on many dynamic parameters of the Op-Amp [27][28][29], including:…”

Section: Energy Limitations For Input Stages Op-amp With Maximum Speedmentioning

confidence: 99%

Undesired Operating Points and Hardware Trojans in High-Speed Operational Amplifier Microcircuits

Prokopenko,

Bugakova,

Zhuk

2023

Preprint

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The classification of Trojans in modern analog microcircuits is considered. Using high-speed operational amplifiers (Op-Amps) as an example, the relationship between Op-Amp circuit design and the formation of undesirable states in typical switching circuits is shown. Circuit solutions are proposed to minimize the Trojan states of high-speed Op-Amps. These include limiting the maximum output currents of the input stages of the Op-Amp during the transient process and the use of differentiating transient correction circuits in the Op-Amp.

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Design of bipolar differential opamps with unity gain bandwidth up to 23 GHz

Budyakov

Schmalz²,

Prokopenko

et al. 2008

2008 4th European Conference on Circuits and Systems for Communications

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Architecture and circuit engineering of precision differential amplifiers with increased common-mode rejection

Cited by 3 publications

References 0 publications

The method of the errors calculation from the input common-mode signal in the analog interfaces based on the differential difference operational amplifiers and the ways of their decrease

The method of the errors calculation from the input common-mode signal in the analog interfaces based on the differential difference operational amplifiers and the ways of their decrease

Undesired Operating Points and Hardware Trojans in High-Speed Operational Amplifier Microcircuits

Design of bipolar differential opamps with unity gain bandwidth up to 23 GHz

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