{"title":"Converting CCIIs to CFOAs in current-mode circuits","authors":"P. Aronhime, K. Wang","doi":"10.1109/MWSCAS.1998.759470","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759470","url":null,"abstract":"The effects on the current-mode transfer functions of a linear network consisting of a subnetwork N connected to a positive second generation current conveyor (CCII+) are determined when the CCII+ is replaced by a current feedback op-amp (CFOA) and a feedback component is added between the output of the CFOA and an independent node of N. Two examples are provided to illustrate the utility of the results. A new theorem is then presented and proved which generalizes the results. This theorem should be useful for the comparison, synthesis, and improvement of linear current-mode circuits.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126436545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Redesign strategies for digital VLSI circuits with incomplete implementation information","authors":"M. A. Khalil, C. Wey","doi":"10.1109/MWSCAS.1998.759483","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759483","url":null,"abstract":"This paper deals with the problem of recovering the design of digital VLSI circuits with incomplete implementation information. A circuit is redesignable if the transfer function of the portion with incomplete implementation information can be derived cost effectively from the partially known information. The derived transfer functions are then used to re-implement the missing portions. We do not intend to discover the exact circuit schematic and components that were present in the circuit originally implemented. Rather, the functions originally intended to be present will be identical. The developed redesign process is comprised of three steps: redesignability check, feasibility check, and reimplementation. Based on the redesign process, experimental results on a number of MCNC benchmark circuits are reported.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122845497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Power/performance relations in downconversion mixers for wireless transceivers","authors":"A. Hafez, M.I. Elmsry","doi":"10.1109/MWSCAS.1998.759532","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759532","url":null,"abstract":"The downconversion mixer is one of the key blocks of the wireless receiver, and a significant power sink. This work is a simple first-order analysis of the dependance of power consumption of downconversion mixers in wireless transceivers on the performance parameters.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123171940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Projection methods for improved performance in adaptive interference suppression in CDMA systems","authors":"R. A. Soni, W. Jenkins","doi":"10.1109/MWSCAS.1998.759422","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759422","url":null,"abstract":"Recently, the use of adaptive filtering strategies such as the least mean square (LMS) and recursive least squares (RLS) methods have been employed to form MSE optimal detectors for CDMA wireless systems. LMS strategies suffer from poor convergence behavior which is a function of the number of users in the system, and the inability to track fast fades. RLS techniques offer slightly better performance but don't exploit the inherent structure of the CDMA received sequence auto-correlation matrix to improve performance. This paper presents a new adaptive technique for MMSE interference suppression in CDMA systems motivated by linear adaptive algorithms which are scalable in performance and complexity. Optimal performance is achieved when the scalable parameter L, is matched to the number of users in the system. Extensive simulation results are presented for these techniques.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"271 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115984758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of impact of victim cache and victim tracer on a fully associative disk cache","authors":"R. Pendse, N. Kushanagar, U. Walterscheidt","doi":"10.1109/MWSCAS.1998.759439","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759439","url":null,"abstract":"In this paper, we present results of investigation to study the impact of victim cache and victim tracer on the miss rates due to the LRU block replacement algorithm. A total of three different algorithms were implemented. They include the basic LRU, LRU with victim cache, and LRU with victim tracer. All the algorithms were implemented as a part of a disk cache. For victim cache and victim tracer, a unique priority scheme was used. Extensive simulations were performed on all the algorithms. The results indicate that adding a victim cache or victim tracer does improve the performance.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132546114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A subthreshold CMOS implementation of a two-dimensional mechanical cochlear model","authors":"H. Om'mani, P. Furth","doi":"10.1109/MWSCAS.1998.759554","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759554","url":null,"abstract":"We present a two-dimensional passive silicon cochlea based on the work of Watts [1993]. The model propagates waves in the backward and forward directions with succeeding stages loading earlier stages. CMOS resistors operating in the subthreshold ohmic region implement the uniform cochlear fluid. SPICE simulations reveal a cutoff slope in excess of 100 dB/oct, which compares well with experimental results.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"43 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116861499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On the relation between the maximum errors of the least pth approximation and the minimax approximation by a rational function","authors":"T. Nishi, Feng Lu","doi":"10.1109/MWSCAS.1998.759558","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759558","url":null,"abstract":"This paper deals with the least pth approximation (p even) by a rational function and gives a theoretical lower bound for the ratio of the maximum error of the minimax approximation to that of the least pth approximation. Through numerical examples on various kinds of functions we verified that the above lower bound is a good estimation for the corresponding actual ratios. These results show that the least pth approximation for p=8 or 16 is usually enough to achieve a good approximation to the minimax approximation.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123971185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simulation of ungrounded shipboard power systems in PSpice","authors":"Haibo Zhang, K. Butler, N. Sarma","doi":"10.1109/MWSCAS.1998.759435","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759435","url":null,"abstract":"Navy shipboard power systems (SPSs) have different characteristics when compared to utility power systems. To conduct system studies on SPSs, an effective simulation tool is required. PSpice is a very robust analog/digital circuit simulator, but it is rarely used in power system studies. This paper presents a PSpice methodology for modeling SPSs. Transient simulation results are also presented.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130245879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A CMOS mixed signal simultaneous bidirectional signaling I/O","authors":"S. Jackson, B. Blalock","doi":"10.1109/MWSCAS.1998.759430","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759430","url":null,"abstract":"Limited pin counts and achievable bandwidth have become a major limitation to achievable I/O speed of integrated circuits. Previously published current-mode techniques enable I/O circuits to achieve simultaneous bidirectional signaling. This maximizes data rate with minimal I/O power dissipation and minimal I/O pin count. A new I/O circuit fabricated in 2 /spl mu/m CMOS is described in this work which is capable of handling both analog and digital data signals in a simultaneous bidirectional manner. Mixed-signal operation is achieved by using an analog transmitter to steer current in and out of a transmission line with a receiver amplifier recovering the receive signal.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117061472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On stability of subharmonic oscillations in nonlinear systems","authors":"S. Qiu, I. Filanovsky","doi":"10.1109/MWSCAS.1998.759450","DOIUrl":"https://doi.org/10.1109/MWSCAS.1998.759450","url":null,"abstract":"A method for verification of subharmonic oscillation stability in nonlinear systems with a polynomial type of nonlinearity is proposed. The main harmonic and the subharmonic are represented in the exponential form and substituted into the system differential equation. Amplitudes of both harmonics are perturbed, and the subharmonic amplitude perturbation operator equation is obtained. Then, only the terms representing the first order derivatives are retained. The real and imaginary parts of the operator equation are separated to give the system of two linear differential equations for the components of subharmonic amplitude perturbation. The perturbations of the main harmonic are eliminated using the main harmonic equation. Then the characteristic equation of this system is used for verification of the subharmonic stability.","PeriodicalId":338994,"journal":{"name":"1998 Midwest Symposium on Circuits and Systems (Cat. No. 98CB36268)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126855854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}