The artificial bee colony algorithm (ABC), a population based algorithm, provides solutions with better accuracy compared to other competitive population based algorithms. However, it suffers from slow convergence speed. We suggest modifications in search strategy of ABC to improve overall performance and named this modified algorithm, Efficient ABC algorithm (EABC). The performance of EABC is ...

This article aims to present the design of a 4.5-V, 450mA low drop-out (LDO) voltage linear regulator based on a twostage cascoded operational transconductance amplifier (OTA) as error amplifier. The aforementioned two-stage OTA is designed with cascoded current mirroring technique to boost up the output impedance. The proposed OTA has a DC gain of 101 dB under no load condition. The designed r...

This paper proposes two techniques for improving the linearity and power efficiency of switched-capacitor (SC) circuits. The first is a high-speed switched-current-assisting (SCA) path that helps the main (folded-cascode) OTA to deliver most of the desired charge to the integration capacitor, leaving the final error correction to be completed by the main OTA. The second is a pre-charging (PC) p...

A fully-differential seventh-order 0.05° equiripple linear phase low-pass filter based on multiple loop feedback (MLF) leapfrog (LF) topology is presented for read/write channels. The filter is designed and simulated with the proposed fully balanced, highly linear operational transconductance amplifier (OTA). This OTA contains two complementary differential cross-coupled input pairs and a pair ...

A novel linear tunable transconductor based on a combination of linearization techniques is presented. The input signal is transferred to the – conversion element by means of a high-speed feedback loop. Then, the linear – conversion is accomplished using quasi-floating-gate MOS transistors biased in the triode region. Finally, the absence of current mirrors in the signal path provides low sensi...

This paper presents a new compensation method for fully differential two-stage CMOS operational transconductance amplifiers (OTAs). It employs a hybrid cascode compensation scheme, merged Ahuja and improved Ahuja style compensations, for fast settling. A design procedure for minimum settling time of the proposed compensation technique for a two-stage class A/AB OTA is described. To demonstrate ...

An analytical method based on the standard square-law metal–oxide–semiconductor (MOS) modeling for the design of highly linear, fully differential complementary metal–oxide–semiconductor (CMOS) operational transconductance amplifier (OTA) is presented. The proposed circuit implementation combines a cross-coupled quad cell and a source-coupled differential pair, as well as the current mirror tec...

We certify that this work has passed the scholastic standards requested by the Information and Communications University as a thesis for the Abstract The commercialization of Ultra-WideBand (UWB) ranging from 3.1-10.6 GHz by Federal Communication Commission (FCC) has recently emerged as a promising technology for short-range wireless data communications. The applications of wireless data commun...

— The paper considers some basic problems in the design of tunable fully differential gyrator resonance circuit. First is presented briefly the theory of the parallel gyrator tank with emphasizing on the effects from the amplifier imperfections. Then is considered the design of a single stage operational transconductance amplifier (OTA) with source degeneration for better linearity. It is demon...

This paper presents the design and preliminary results of a full differential sample-and-hold circuit based on the "flipped voltage follower" (FVF) cell. The heart of this circuit is a fully differential low-voltage OTA based on FVF technique. The use of the FVF reduces the supply power requirements in the OTA. To overcome input sampling switches limitation imposed by the low supply voltage we ...