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...

This chapter, one of the longer of those within the book, deals with topics just as important as all of those basic circuits immediately surrounding the op amp, discussed earlier. The chapter deals with various and sundry circuit/system issues which fall under the guise of system hardware and housekeeping techniques. In this context, the hardware and housekeeping may be all those support items ...

Three circuit techniques are proposed that provide (with simultaneous use) an increase bymore than two orders of magnitude the maximum output voltage slew rate (SR) microelectronicoperational amplifiers (op-amps) based on bipolar transistors with a classical architecture,designed to operate in automatic control systems, radio engineering and communications, forexample, as drivers for ultra-high...

Short channel MOSFET exhibits the characteristics of wide bandwidth and low DC gain. A gain causes a high error narrow output linear range in closed loop. The gains can be improved by using cascade structure, but frequency compensation is required due to increase number poles. nodes each stage Common-Source amplifier have zero, this zero cancelled out input node next stage. This paper proposes ...

The need for high bandwidth operational amplifiers (op amp) exists for numerous applications. This need requires research in the area of op amp bandwidth extension. The exploited method in this thesis uses a class of compensation called Indirect Feedback Frequency Compensation in which the compensation current is fed back indirectly from the output to an internal high impedance node, to extend ...

I T IS A well-known fact that the frequency response of an operational amplifier (op amp) affects the performance of active filters employing these devices. The frequency dependent gain of the op amp causes both a perturbation in the desired poles of the active filter from their nominal position and the introduction of parasitic poles in the active transfer function. It has also been observed b...