A Novel Class AB CMOS Operational Amplifier

A Novel-Class AB Transconductor suitable for High Speed CMOS Operational Amplifier

A novel class-AB transconductance amplifier, suitable for the input stage of high slew rate CMOS operational amplifier is proposed. The proposed class-AB transconductor is realized from a differential pair of mixed translinear common-drain push-pull circuit. A high speed operational amplifier employing the proposed input stage and a complementary common –source high gain stage is presented. HSP...

A Fully Differential CMOS Telescopic Operational Amplifier with Class AB Output Stage

The design of a fully differential CMOS transconductance operational amplifier is presented. Topology selection, compensation, biasing, and common mode feedback are discussed. Design analysis and simulations are presented demonstrating that the amplifier exceeds the specifications for application in the first stage of a 13-bit pipelined A/D converter, while dissipating an average of 66 mW of po...

A Cmos Class-ab Transconductance Amplifier for Switched-capacitor Applications

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...

Fuding Ge: Folded-cascode Class-AB Operational Amplifier

A ±2.45V-Swing CMOS Telescopic Operational Amplifier

A telescopic cascode opamp typically has a higher frequency capability and consumes less power than other topologies. The disadvantage of a telescopic opamp is severely limited output swing. In a conventional telescopic opamp shown in Figure 1, all transistors are biased in the saturation region. Transistors M1-M2, M7-M8 and the tail current source M9 must have at least Vds,sat to offer a good ...