A new OTA-based logarithmic-control variable gain current amplifier (LCCA) is presented. It consists of two Operational Transconductance Amplifier (OTA) and two PMOS transistors biased in weak inversion region. The circuit operates from 0.6V DC power supply and consumes 0.6 μW. The linear-dB controllable output range is 43 dB with maximum error less than 0.5dB. The functionality of the proposed...

A novel design technique employing CMOS Current Feedback Operational Amplifier (CFOA) is presented. The feature of consumption very low power in designing pseudo-OTA is used to decreasing the total power consumption of the proposed CFOA. This design approach applies pseudo-OTA as input stage cascaded with buffer stage. Moreover, the DC input offset voltage and harmonic distortion (HD) of the pr...

Abstract: A new circuit realization for OTA-C current-mode comb filter is proposed to remove the undesirable multiple frequency signals. The proposed filter uses only OTAs and capacitors, hence suitable for monolithic integrated circuit implementation. The proposed OTA-C comb filter is simulated in PSPICE using a behavioral macro-model of the OTA as well with a practical CMOS OTA circuit. The w...

The OTA is an amplifier whose differential input voltage produces an output current. Thus, it is a voltage controlled current source. Operational transconductance amplifier is one of the most significant building-blocks in integrated continuous-time filters. We show that the operational transconductance amplifier (OTA), as the active element in basic building blocks. In this paper Low pass filt...

Mixed and analog systems design with high performance suffers from many difficulties due to supply voltage, power consumption and area overhead. A need for low-voltage low-power operational amplifiers exists and used for some applications. This paper deals an effective OTA design for good PSRR, low-voltage, low-power and wide output voltage swing operational amplifier. Trying to combine an alte...

In this work one presented the design a 3bits, 10MSPS of a low power, high speed analog to digital pipelined Converter for CMOS image sensors. The OTA plays an important role in the ADC, because of its conversion rate and power consumption are limited by the performance of the OTA. The designed ADC in this paper employs parallel pipeline architecture based on Double Buffered S&H Circuit with CM...

A pseudo-differential fully balanced fully symmetric CMOS operational transconductance amplifier (OTA) architecture with inherent common-mode detection is proposed. Through judicious arrangement, the common-mode feedback circuit can be economically implemented. The OTA achieves a third harmonic distortion of 43 dB for 900 mVpp at 30 MHz. The OTA, fabricated in 0.5m CMOS process, is used to desi...

An effective current scaling method with source degenerated resistors proposed in the design of Bulk-Driven Folded-Cascode (BDFC) amplifier. The transconductance of the amplifier significantly vary with the common mode voltage. A 0.5V efficient Band Pass Filter (BPF) using bulk driven Operational Trans conductance amplifier (OTA) is designed for detection of QRS complex in ECG signal 17Hz. A lo...