A fully differential Miller op-amp with a composite input stage using resistive local common-mode feedback and regulated cascode transistors is presented here. High gain pseudo-differential auxiliary amplifiers are used to implement the in order boost output impedance of open-loop op-amp. Both stages operate class AB mode. The proposed has been simulated 130nm commercial CMOS process technology...

A new approach for CMOS Current-Mode Integrator (CMI) and Differentiator (CMD) realization are presented in this work. The proposed circuits are employed the inverter-based second-generation current conveyor (CCII). The CCII circuit achieves minimum number of stack transistors between the rail supply and class AB operation ability. Therefore, the proposed circuits are considered as low voltage ...

The sigma delta technique is an attractive approach for many communication applications. The possible alternatives are the use of continuous-time or sampled data modulators. This paper discusses various circuit techniques that enable very low power with switched capacitor architectures. The target applications are WCDMA and ADSL. Circuit implementations show that the use of techniques like use ...

The continuous increase of integration densities in Complementary Metal–Oxide–Semiconductor (CMOS) technology has driven the rapid growth of very large scale integrated (VLSI) circuit for today's high-tech electronics industries from consumer products to telecommunications and computers. As CMOS technologies are scaled down into the nanometer range, analog and mixed integrated circuit (IC) desi...

This paper proposes a new self-biased op-amp’s startup circuit design and improved bandgap core circuit for all CMOS bandgap voltage reference (BGR). In a conventional BGR circuit, the startup circuit may be designed either be required an external power on reset signal (POR) or composed of several MOS transistors for generating bias current and the bandgap core circuits has two nodes that are c...

While in the process of reviewing Texas Instruments applications notes, including those from the recently acquired Burr-Brown – I uncovered a couple of treasures, this handbook on active RC networks and one on op amp applications. These old publications, from 1966 and 1963, respectively, are some of the finest works on op amp theory that I have ever seen. Nevertheless, they contain some materia...

The conventional sine wave oscillator circuits use phase shifting techniques that RC phase shift oscillator using op-amp in inverting amplifier introduces. Figure show a RC phase shift oscillator using Op-Amp with gain 5(Vo/Vi). My assumption : Circuit is generating a sine wave with a peak to peak voltage of 10v. Voltage stability, specifically the lack of, when using a resister divider is the ...

This paper presents a multistage amplifier for low-voltage applications (<2 V). The amplifier consists of simple (noncascode) low gain stages and is stabilized using a nested transconductance-capacitance compensation (NGCC) scheme. The resulting topology is similar to the well known nested Miller compensation (NMC) multistage amplifier, except that the proposed topology contains extra Gm feedfo...

This work presents a low-power 10-bit 40 MSPS Pipelined ADC with 1.8V supply voltage in 180nm silicon-based CMOS process. Simultaneous capacitor sharing and op-amp technique is used between two successive stages of Sample-and-Hold Amplifier (SHA) to reduce the power consumption. The memory effect proposed eliminated by low input capacitance variable gm op-amp. differential integral nonlinearity...