The paper proposes a novel self-reference voltage pre-regulator for LED driver chip. The system modeling of the self-reference voltage pre-regulator is established, which is composed of pre-regulator circuit and reference voltage generating circuit. The reference voltage generating circuit generates a reference voltage, in which the circuit returns the reference voltage as the reference voltage...

In this study, a new artificial intelligence based optimization method is applied to optimize the gains of PID controller for Automatic Voltage Regulator (AVR) system. A dynamic performance of the controller which is optimized with ABC algorithm is compared with the results which are obtained with Particle Swarm Optimization (PSO). The transient response analysis is used in order to determine t...

The optimal design of the automatic voltage regulators for a synchronous machine are positively reflected on quality stability. This paper is concerned with an AVR by adopting three control techniques. first one was designed according to traditional proportional integration-derived (PID) controller while fuzzy logic adopted in second powerful controller, finally PID regulator (AVR) based techno...

The paper presents design considerations for a 12-V/1.5-V, 50-A voltage regulator module (VRM) for the next generation of microprocessors. The module has stringent powerdensity and transient-response specifications, which are hard to meet with traditional design techniques. The proposed design solutions increase the VRM efficiency, as well as achieve the desired transient response with a minimu...

Let ). < i, be infinite cardinals and let Q be a set of cardinality 'c. The bounded permutation group B. (Q), or simply B2, is the group consisting of all permutations of Q which move fewer than A points in Q. We say that a permutation group G acting on Q is a supplement of B2 if BA G is the full symmetric group on Q. In [7], Macpherson and Neumann claimed to have classified all supplements of ...

Applying the voltage-mode hysteretic control to multiphase Voltage Regulator Modules (VRMs) can satisfy many of the new and future generation of microprocessors and ICs powering requirements. This is because of the numerous advantages that can be obtained when both techniques are used. However, several challenges arise that include current sharing, multiphase control signals distribution, high-...