This paper develops slacks-based measure (SBM) and additive SBM (ASBM) to evaluate efficiency of decision making units (DMUs) in a two-stage structure with undesirable outputs and feedback variables from the internal perspective. The SBM model is linearized  for a specific weight and the ASBM model is reformulated as a second order cone program. The target values for all inputs, outputs (both d...

This paper presents a novel CMOS low-voltage and low-power positive second-generation current conveyor (CCII+ ). The proposed CCII+ uses two n-channel differential pairs instead of the complementary differential pairs; i.e. (n-channel and p-channel), to realize the input stage. This solution allows almost a rail-to-rail input and output operation; also it reduces the number of current mirrors n...

Current starved VCO is simple ring oscillator consisting of cascaded inverters. Differential ring oscillator has a differential output to reject common-mode noise, power supply noise and so on. In this paper we have designed and simulated Current Starved VCO and Differential VCO for PLL in Tanner 13.0v 0.18μm digital CMOS process. Performance comparison is done in terms of high oscillation freq...

A multiport converter promises cost-effective, flexible and more efficient energy processing by utilizing only a single power stage. Multiport converters, a promising concept for alternative energy systems, have attracted increasing research interest recently. Zero Voltage Switching (ZVS) alleviates the switching losses and improves the converter overall efficiency. Zero voltage switching can b...

This thesis details the design and simulation of a low-voltage, low-power rail-to-rail input and output high speed operational amplifier. Various input and output structures from the literature are analyzed. Intermediate stage concerns, compensation, current distribution, and power supply, common-mode voltage, and temperature variations are addressed. Considerable time is spent analyzing variou...

Low Noise Amplifier, CMOS, Noise Canceling, Technique. This paper presents a 0.8V, 3.6GHz narrow band CMOS low noise amplifier (LNA). A current-reused technique is employed to increase the gain of LNA. Also, in order to achieve low noise figure, a noise canceling technique is used in the output stage. The high gain LNA was designed and simulated in 0.13 μm CMOS process. A gain of 27 dB at 3.6GH...

Many class B designs can be operated in class A at low power levels if the quiescent current is increased. However, this often worsens the distortion characteristics of the output stage, particularly at intermediate (and audibly important) power levels, by displacing the crossover point to a region where the transfer slope is much steeper, and the crossover discontinuity therefore much more pro...

Power efficiency is critical for electrical stimulators. Battery life of wearable stimulators and wireless power transmission in implanted systems are common limiting factors. Boost DC/DC converters are typically needed to increase the supply voltage of the output stage. Traditionally, boost DC/DC converters are used with fast control to regulate the supply voltage of the output. However, since...

This paper proposes an architecture of 3 rd order SDM(Sigma-Delta Modulator) with delayed feedforward path in order to reduce power consumption and area. The proposed SDM improve the architecture of conventional 3 rd order SDM which consists of two integrators. In the proposed architecture, the coefficient values of the first stage are doubled by inserting the delayed feed-forward path into the...

A flicker-free resonant LED driver with high power factor (PF) and passive current balancing is proposed analysed in this paper. The are composed a buck correction (PFC) unit dc-dc by sharing an active switch. Based on topology, the low output ripple can be achieved via small voltage bulk capacitor fast voltage-mode control loop. By charge balance for capacitor, of each string balanced. In half...