Abstract
A novel differential input pair and single output OTA is designed in this paper. This FCOTA is designed by using current mirror and its enhanced gain parameter and also is reduce the power dissipation and increase the gain bandwidth. Simulation results are performed using Mentor Graphics software model for CMOS TSMC 180 nm process technology. The supply voltage is given 1.8 v. The designed FCOTA has different capacitive load and according its Gain, Unity Gain Bandwidth, Power Dissipation, Phase Margin and Slew Rate are measured. Gain, Unity Gain Bandwidth and Slew Rate are optimizing up to 97.37 db, 20.83 GHz and 3.5075 KV/μs respectively. The power dissipation reduces up to 8.31 μW. This FCOTA is designed for wide band application because of high gain and high bandwidth and low power dissipation.
Highlights
Amplifier is one of the basic and important circuits which have a wide range of applications in sever
One way of increasing the impedance is to add some MOSFETs at the output side or in second stage to include for using an active load
(M3, M4), (M5,M6) are NMOS pair and (M7,M8), (M9,M10) are PMOS pair are working as a current mirror self biased
Summary
Amplifier is one of the basic and important circuits which have a wide range of applications in sever. This is accomplished by the continual integration of complex analog building blocks on a single chip [1]. To remove the drawback of telescopic OTA i.e. limited output swing and difficulty in shorting the input and output a Folded Cascode OTA is used. This design follows three stages such as (i) Input Pair, (II) Current mirror Cascode Stage and (III) Biasing Stage. Current mirror is a one type of approach to copy current at output side [4]
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