A programmable high-frequency operational transconductance amplifier (OTA) is proposed and analyzed. A general configurable analog block (CAB) is presented, which consists of the proposed programmable OTA, programmable capacitor and MOSFET switches. Using the CABs, the universal tunable and field programmable analog array (FPAA) can be constructed, which can realize many signal-processing funct...

A novel CMOS operational transconductance amplifier (OTA) is presented, using a fully differential singlestage core OTA as input stage and a differential to single current converter as output stage, each biased at a separate current level. A large gain-bandwidth (GBW) product (2.7 MHz) and a high slew-rate (5 V//.LS) can be obtained by applying a large bias current to the core OTA. Due to the c...

In this paper, a low Power, Gain Boosted Recycling Folded Cascode Operational Transconductance Amplifier (GB-RFC OTA) is described. The proposed GB-RFC OTA is designed using 130nm CMOS technology and achieves enhanced gain, unity gain bandwidth and slew rate with the low Power budget. The proposed circuit operates on 1V supply voltage and 200 μA bias current and consumes a power of 798μW.The GB...

ABSTRACT: Miller compensated OTAs are generally used for frequency stabilization. With increasing in gain of cascaded OTA the frequency response decreases in terms of gain bandwidth product and phase margin. To increase the gain at differential stage of OTA, a positive feedback is applied which increases gain without decreasing the gain bandwidth product and phase margin. The above prototype is...

The operational amplifiers (OPAMP) are basic building blocks in implementing a variety of analog circuits such as amplifiers, filters, integrators, differentiators, summers, oscillators etc. OPAMPs work well for lowfrequency applications, such as audio and video systems. For higher frequencies, however, OPAMP designs become difficult due to their frequency limit. At those high frequencies, oper...

The signal to noise ratio and resolution of an analog to digital converter is governed by the linearity constraints of the basic building block, which is the Operational Transconductance Amplifier (OTA). The OTA design is based on MOS transistors that are inherently non linear and lead to performance deterioration. To overcome the non-linearities imposed by the OTA a resistive source degenerati...

Designing ideal analogue circuits has become difficult due to extremely large-scale integration. The complementary metal oxide semiconductor (CMOS) analog integrated (IC) could use an evolutionary method figure out the size of each device. CMOS operational transconductance amplifier (CMOS OTA) and current conveyor second generation CCII) are designed using advanced nanometer transistor technolo...

This paper gives important features of CMOS and BiCMOS four-diodes direct coupled tuneable resistance. Circuit performances of three resistance topologies are explored and compared with the traditional CMOS tuneable transresistance designed from a one-stage operational transconductance amplifier (OTA). Simulations results have been realised using nominal parameters of the AMS 0.8μm CMOS and BiC...

This paper presents an ultra-low power operational transconductance amplifier (OTA) operating in the weak inversion region. To increase dc gain, this OTA includes two partial positive feedbacks input differential pair and active loads. In addition, we output resistance by increasing channel length L of transistors. analyze stability OTA, transfer function as well small-signal voltage are derive...