Mircea Bodea - Academia.edu (original) (raw)
Papers by Mircea Bodea
2010 XIth International Workshop on Symbolic and Numerical Methods, Modeling and Applications to Circuit Design (SM2ACD), 2010
Using symbolic algorithms for small signal circuit parameter extraction could make possible imple... more Using symbolic algorithms for small signal circuit parameter extraction could make possible implementing extraction programs which, unlike those based on pure numerical methods, no longer require initial (“start”) values for the parameters being extracted, thus ensuring that the final result corresponds to the true global minimum of the error function. Solving the extraction problem, in the particular case of a
2008 11th International Conference on Optimization of Electrical and Electronic Equipment, 2008
A direct extraction method for small signal parameter extraction of a linear circuit is presented... more A direct extraction method for small signal parameter extraction of a linear circuit is presented. Unlike the numerical method approach, this algorithm doesn't make use of "start values" and performs complex symbolic computation in conjunction with numeric subroutines. Extraction of small signal parameters of a particular circuit illustrates the viability of the method and evidences the elements of the associated
1976 International Electron Devices Meeting, 1976
ABSTRACT
Electronics Letters, 1980
ABSTRACT
Electronics Letters, 1976
ABSTRACT
A full thermal investigation of the 726-microampere Temperature Stabilized Substrate Integrated C... more A full thermal investigation of the 726-microampere Temperature Stabilized Substrate Integrated Circuit (TSS IC) has been performed using a new and accurate quasi-three-dimensional numerical method. This new method allows a reduction of the three-dimensional thermal problem to a bidimensional one. This reduction does not affect the accuracy of the computed temperature distribution of the semiconductor chip. The validity of our
UPB Scientific Bulletin, Series C: Electrical Engineering
Revue Roumaine des Sciences Techniques - Serie Électrotechnique et Énergétique
This paper presents the analysis of CMOS re-configurable multi-standard radio receivers building ... more This paper presents the analysis of CMOS re-configurable multi-standard radio receivers building blocks core. The paper's main goal is to determine the building blocks key parameters, like gain, noise figure (NF) and third order intercept point (IP3) and to link them to the receiver overall performance. An overview of existing circuit topologies is presented. The analysis emphasizes the solutions that fit best a true re-configurable multi-standard implementation.
This paper analyzes the noise–linearity breakdown in direct conversion multi-standard radio recei... more This paper analyzes the noise–linearity breakdown in direct conversion multi-standard radio receivers embedding analog signal conditioning. The paper’s main goal is to develop a systematic noise–linearity partitioning methodology to be used in splitting the multi-standard receiver noise and linearity budget between its high frequency (HF) part and its low frequency (LF) baseband part. To this aim, a new and efficient design methodology tailored towards multi-standard receivers, and based on manual analysis, is developed. By using the developed methodology, power saving is enabled in the HF part through changing the multi-standard receiver HF part noise and linearity performance with its RF front-end gain. While for the LF part, the analysis revealed the performance can be kept the same to allow power optimization through dedicated circuit design.
This paper analyses the key trade-off that shapes the design of direct conversion radio receivers... more This paper analyses the key trade-off that shapes the design of direct conversion radio receivers embedding analog signal conditioning: the trade-off between the receiver area, determined by its anti-alias Low Pass Filter (LPF) order, and its power consumption, constrained by the ADC specifications of resolution and speed. The paper's main goal is to determine the receiver's LPF order that enables the complete analog channel selection in the context of a multi-standard receiver implementation. Based on the multi-standard receiver generic blocker diagram analysis, a first order, system level analysis is used to determine the LPF order. The analysis is constructed from the circuit / transistor level designer perspective and is also used for estimating the impact of the complete analog channel selection on the receiver RF front-end power consumption and area. Thus, by using this analysis methodology the designer is enabled to handle efficiently the large amount of information r...
Revue Roumaine des Sciences Techniques - Serie Électrotechnique et Énergétique
This paper presents the analysis of CMOS re-configurable multi-standard radio receiv¬ers building... more This paper presents the analysis of CMOS re-configurable multi-standard radio receiv¬ers building blocks core. The paper’s main goal is to determine the building blocks key parameters, like gain, noise figure (NF) and third order intercept point (IP3) and to link them to the receiver overall performance. An overview of existing circuit topologies is presented. The analysis emphasizes the solutions that fit best a true re-configurable multi-standard implementation.
This paper analyzes the gain – noise – linearity partitioning in multi-standard radio receivers e... more This paper analyzes the gain – noise – linearity partitioning in multi-standard radio receivers embedding baseband analog signal conditioning. The presented novel gain partitioning strategy tailored towards multi-standard radio receivers optimally mitigates the extreme reception conditions specific to the wireless environment. Based on a first order system level analysis, the paper develops a standard independent methodology that drives the gain partitioning strategy and enables the designer to handle efficiently the large amount of information from the envisaged wireless standards. The receiver gain is split between an RF front-end embedding programmable gain and a high-dynamic range Variable Gain Amplifier (VGA). As the receiver NF and IIP3 change with the RF front-end gain, we proposed a generic algorithm to find the optimal gain partitioning between the receiver's two variable gain blocks.
2003 International Semiconductor Conference. CAS 2003 Proceedings (IEEE Cat. No.03TH8676), 2003
This paper evaluates the design trade-offs for a high frequency RF front-end. The main three fact... more This paper evaluates the design trade-offs for a high frequency RF front-end. The main three factors - gain, linearity, noise - influence is analyzed, in order to get an optimum performance for the receiver. The analysis is focused on the weight of the main blocks (the low noise amplifier - LNA and the mixer) parameters oil the RF frontend operation.
2003 International Semiconductor Conference. CAS 2003 Proceedings (IEEE Cat. No.03TH8676), 2003
2010 XIth International Workshop on Symbolic and Numerical Methods, Modeling and Applications to Circuit Design (SM2ACD), 2010
Using symbolic algorithms for small signal circuit parameter extraction could make possible imple... more Using symbolic algorithms for small signal circuit parameter extraction could make possible implementing extraction programs which, unlike those based on pure numerical methods, no longer require initial (“start”) values for the parameters being extracted, thus ensuring that the final result corresponds to the true global minimum of the error function. Solving the extraction problem, in the particular case of a
2008 11th International Conference on Optimization of Electrical and Electronic Equipment, 2008
A direct extraction method for small signal parameter extraction of a linear circuit is presented... more A direct extraction method for small signal parameter extraction of a linear circuit is presented. Unlike the numerical method approach, this algorithm doesn't make use of "start values" and performs complex symbolic computation in conjunction with numeric subroutines. Extraction of small signal parameters of a particular circuit illustrates the viability of the method and evidences the elements of the associated
1976 International Electron Devices Meeting, 1976
ABSTRACT
Electronics Letters, 1980
ABSTRACT
Electronics Letters, 1976
ABSTRACT
A full thermal investigation of the 726-microampere Temperature Stabilized Substrate Integrated C... more A full thermal investigation of the 726-microampere Temperature Stabilized Substrate Integrated Circuit (TSS IC) has been performed using a new and accurate quasi-three-dimensional numerical method. This new method allows a reduction of the three-dimensional thermal problem to a bidimensional one. This reduction does not affect the accuracy of the computed temperature distribution of the semiconductor chip. The validity of our
UPB Scientific Bulletin, Series C: Electrical Engineering
Revue Roumaine des Sciences Techniques - Serie Électrotechnique et Énergétique
This paper presents the analysis of CMOS re-configurable multi-standard radio receivers building ... more This paper presents the analysis of CMOS re-configurable multi-standard radio receivers building blocks core. The paper's main goal is to determine the building blocks key parameters, like gain, noise figure (NF) and third order intercept point (IP3) and to link them to the receiver overall performance. An overview of existing circuit topologies is presented. The analysis emphasizes the solutions that fit best a true re-configurable multi-standard implementation.
This paper analyzes the noise–linearity breakdown in direct conversion multi-standard radio recei... more This paper analyzes the noise–linearity breakdown in direct conversion multi-standard radio receivers embedding analog signal conditioning. The paper’s main goal is to develop a systematic noise–linearity partitioning methodology to be used in splitting the multi-standard receiver noise and linearity budget between its high frequency (HF) part and its low frequency (LF) baseband part. To this aim, a new and efficient design methodology tailored towards multi-standard receivers, and based on manual analysis, is developed. By using the developed methodology, power saving is enabled in the HF part through changing the multi-standard receiver HF part noise and linearity performance with its RF front-end gain. While for the LF part, the analysis revealed the performance can be kept the same to allow power optimization through dedicated circuit design.
This paper analyses the key trade-off that shapes the design of direct conversion radio receivers... more This paper analyses the key trade-off that shapes the design of direct conversion radio receivers embedding analog signal conditioning: the trade-off between the receiver area, determined by its anti-alias Low Pass Filter (LPF) order, and its power consumption, constrained by the ADC specifications of resolution and speed. The paper's main goal is to determine the receiver's LPF order that enables the complete analog channel selection in the context of a multi-standard receiver implementation. Based on the multi-standard receiver generic blocker diagram analysis, a first order, system level analysis is used to determine the LPF order. The analysis is constructed from the circuit / transistor level designer perspective and is also used for estimating the impact of the complete analog channel selection on the receiver RF front-end power consumption and area. Thus, by using this analysis methodology the designer is enabled to handle efficiently the large amount of information r...
Revue Roumaine des Sciences Techniques - Serie Électrotechnique et Énergétique
This paper presents the analysis of CMOS re-configurable multi-standard radio receiv¬ers building... more This paper presents the analysis of CMOS re-configurable multi-standard radio receiv¬ers building blocks core. The paper’s main goal is to determine the building blocks key parameters, like gain, noise figure (NF) and third order intercept point (IP3) and to link them to the receiver overall performance. An overview of existing circuit topologies is presented. The analysis emphasizes the solutions that fit best a true re-configurable multi-standard implementation.
This paper analyzes the gain – noise – linearity partitioning in multi-standard radio receivers e... more This paper analyzes the gain – noise – linearity partitioning in multi-standard radio receivers embedding baseband analog signal conditioning. The presented novel gain partitioning strategy tailored towards multi-standard radio receivers optimally mitigates the extreme reception conditions specific to the wireless environment. Based on a first order system level analysis, the paper develops a standard independent methodology that drives the gain partitioning strategy and enables the designer to handle efficiently the large amount of information from the envisaged wireless standards. The receiver gain is split between an RF front-end embedding programmable gain and a high-dynamic range Variable Gain Amplifier (VGA). As the receiver NF and IIP3 change with the RF front-end gain, we proposed a generic algorithm to find the optimal gain partitioning between the receiver's two variable gain blocks.
2003 International Semiconductor Conference. CAS 2003 Proceedings (IEEE Cat. No.03TH8676), 2003
This paper evaluates the design trade-offs for a high frequency RF front-end. The main three fact... more This paper evaluates the design trade-offs for a high frequency RF front-end. The main three factors - gain, linearity, noise - influence is analyzed, in order to get an optimum performance for the receiver. The analysis is focused on the weight of the main blocks (the low noise amplifier - LNA and the mixer) parameters oil the RF frontend operation.
2003 International Semiconductor Conference. CAS 2003 Proceedings (IEEE Cat. No.03TH8676), 2003