Extremely low voltage operational amplifier design with rail-to-rail input common mode range
MetadataShow full item record
Increasing trends towards battery operated systems demand circuits to be designed at low voltages. Low voltage operation severely limits the operational amplifier as a voltage buffer as the input common mode range available is very limited. This work deals with designing a very low voltage amplifier that can be used as a unity gain buffer. The architecture is based on using an operational amplifier in conjunction with an adapter circuit. The compliance voltage of the tail current source is maintained constant by comparing with a reference voltage using negative feedback action. The amplifier has been designed in 0.18µm technology at a supply voltage of 0.8 Volts. The amplifier gives a constant performance for varying common mode voltage as is demanded for a rail-to-rail amplifier. Designed amplifier gives a gain of 77.4dB with an input stage transconductance ‘Gm’ variation of just 1.29 % over the entire input common mode range.
- M Tech Dissertations 
Showing items related by title, author, creator and subject.
Linearity enhancement technique for low noise amplifiers Purohit, Amit Gopal M. (Dhirubhai Ambani Institute of Information and Communication Technology, 2006)The development of CMOS technology in to deep sub micron enables the use of such technology for implementation for GHz RF circuits. Personal communication needs a low cost and low noise RF transceiver for cellular applications ...
FM based pipeline ADC Tandon, Manu (Dhirubhai Ambani Institute of Information and Communication Technology, 2006)This thesis aims at designing a new architecture for an FM based pipelined Analog to Digital Converter (ADC). It is based on the fact that power is a function of voltage and therefore handling with voltage becomes a difficult ...
1v rail to tail operational amplifier design for sample and hold circuits Kumar, Mahesh (Dhirubhai Ambani Institute of Information and Communication Technology, 2009)At low voltage, the input common mode voltage of Operational amplifier is limited which restricts its use as a buffer. This works deals with designing a rail to rail amplifier. The Thesis presents a 1V rail to rail operational ...