Sonia Porta

Sliding-mode control analog integrated circuit for switching DC-DC power converters

This communication describes the design and implementation of a microelectronic CMOS analog integrated circuit that provides versatile sliding-mode control laws for switching DC-DC power converters. In addition to perform general linear-surface state control laws, the controller circuit includes compensating dynamics. The proposal of this analog IC design, which operates in current-mode processing, exhibits good performance as far as operation speed, power consumption, suitability for low-voltage operation and robustness in front of interference are concerned. The main circuit, which allows modular connection, is composed of externally linearized transconductors based on current conveyors, current-mode amplifiers and filtering stages, and a transimpedance high-speed hysteretic comparator. Full-transistor-level post-layout simulations for a CMOS 0.8 /spl mu/m technology and experimental results validate the high-speed functionality of the proposed sliding-mode controller ASIC implementation.

CCII-Based Analog Integrated Circuit for Sliding-Mode Control of Switching Power Converters

The design and implementation of a CMOS analog integrated circuit that provides versatile sliding-mode control laws for high-frequency switching power converters is described. The controller circuit implements general-purpose linear-surface state control laws incorporating compensating dynamics. The analog controller integrated circuit considers current-mode circuit techniques, hence exhibiting good performance as far as operation speed, power consumption, suitability to poorly regulated power supplies and robustness in front of interferences are concerned. Compared to previous designs, the circuit allows the extension of switching frequency operating margin in more than one decade. The circuit allows modular connection, being composed of externally linearized transconductors based on current conveyors, current-mode amplifiers and filtering stages, and a transimpedance high-speed hysteretic comparator. Full-transistor-level post-layout simulations for a CMOS 0.8 μm technology and experimental results validate the high-speed functionality of the proposed sliding-mode controller ASIC implementation. The circuit may be used either as a standalone IC controller or as controller circuit that is technology-compatible with on-chip switching power converters and on-chip loads for future powered Systems on Chip.

Complete nonlinear model for the MRC (MOS resistive circuit)

The most significant sources of nonlinearity in the MOS resistive circuit behaviour are identified and deeply analysed in this contribution. Their influence on the MRC performance and, therefore, in the circuits containing such structure is evidenced through some examples and evaluated. Some reasonable hints about the way to minimise their undesired effects are provided.

Hysteric controller for CMOS on-chip switching power converters

The design and implementation of a CMOS analog integrated circuit that provides versatile sliding-mode control laws for high-frequency switching power converters is described. The controller circuit implements general-purpose linear-surface state control laws incorporating compensating dynamics. The analog controller integrated circuit considers current-mode circuit techniques, hence exhibiting good performance as far as operation speed, power consumption, suitability to poorly regulated power supplies and robustness in front of interferences are concerned. The circuit allows modular connection, being composed of externally linearized transconductors based on current conveyors, current-mode amplifiers and filtering stages, and a transimpedance high-speed hysteric comparator. The IC includes power MOSFETs and their drivers so that all active elements for implementing a switching power converter are included, only remaining as external components the power reactive elements. Layout details for a CMOS 0.35 /spl mu/m technology implementation are discussed. The circuit may be used either as a standalone IC controller or as a controller circuit that is technology-compatible with on-chip switching power converters and on-chip loads for future powered systems on chip.

Multi-mode controller CMOS integrated circuit for switching power converters

The design and implementation of a CMOS analog integrated circuit that provides multi-mode control laws for high-frequency switching power converters is described. The general-purpose controller circuit is capable of implementing classical PWM control, current-mode control with compensating ramp, sliding-mode control and one-cycle control. The main building block within the controller architecture is the current conveyor. Additionally, the IC includes power MOSFETs and their drivers. Layout details for a CMOS 0.35 /spl mu/m technology implementation are discussed.

EKV-Based Nonlinear Analytical Model for the MRC Circuit

Strong differences are detected between the ideal and the actual behaviour of the resistance implemented by an MRC cell. An attempt to deal with these deviations reveals the inadequacy of the widely used BSIM MOSFET model, due to its lack of symmetry when modelling the carrier mobility dependence on the gate voltage. Using instead the EKV model, a nonlinear analytical description for the MRC is presented, rendering a much better estimation of the MRC resistance.

SwitchedCurrent Cellular Nonlinear Networks

This part contains sections titled: Summary This part contains sections titled: Acknowledgments References

Commercial Applications of the CurrentConveyor

This part contains sections titled: Introduction VISTA family of telephone sets Digital audio hi-fi applicatio Conclusions This part contains sections titled: References

CurrentConveyor Basics and Applications

This part contains sections titled: Introduction Background Amplifiers built with current-conveyors Analog computation Impedance conversion Filters The ideal transistor and the current-conveyor Supply-current sensing, current-feedback op-amps and the CCII. CCII01 current-conveyor IA and PFWR application examples of the CCII01 The future of the current-conveyor This part contains sections titled: Acknowledgemnets References

Application of Adaptive Volterra Filters to Equalization

This chapter contains sections titled: Introduction Adaptive equalization Equalization as classification Adaptive Volterra equalization This chapter contains sections titled: References