Advanced opamps and current mirrors

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Presentation transcript:

Advanced opamps and current mirrors 4/26/2017

Wide swing current mirrors 4/26/2017

Wide swing current mirrors For n=1: Vout>2Veff. 4/26/2017

Wide swing current mirrors To ensure all transistors are in the active region: Hence to have Q4 in the saturation region: VTn>nVeff 4/26/2017

Wide swing constant trans-conductance bias circuit 4/26/2017

Wide swing constant trans-conductance bias circuit 4/26/2017

Wide swing constant trans-conductance bias circuit 4/26/2017

Wide swing constant trans-conductance bias circuit The circuit need a start up circuitry: 4/26/2017

Enhanced output impedance current mirror 4/26/2017

Enhanced output impedance current mirror Sackinger implementation of the enhanced impedance current mirror: 4/26/2017

Wide swing current mirror with enhanced output impedance 4/26/2017

Wide swing current mirror with enhanced output impedance 4/26/2017

Current mirror symbol 4/26/2017

Operational transconductance amplifiers (OTA) A folded cascode OTA: In the case of lead compensation: 4/26/2017

Operational transconductance amplifiers (OTA) Slew rate of the folded cascode OTA: 4/26/2017

Current mirror opamp 4/26/2017

Current mirror opamp 4/26/2017

Fully differential opamps A fully differential folded cascode opamp: 4/26/2017

Fully differential opamps A fully differential current mirror opamp: 4/26/2017

Fully differential opamps The fully differential current mirror opamp with improved slewing: 4/26/2017

Fully differential opamps A class AB fully differential opamp: 4/26/2017

Fully differential opamps A fully differential opamp using two single ended opamps: 4/26/2017

Fully differential opamps An opamp with rail to rail input range: 4/26/2017

Common mode feedback A continuous time CMFB: 4/26/2017

Common mode feedback 4/26/2017

Common mode feedback 4/26/2017

Common mode feedback 4/26/2017

Current feedback opamps 4/26/2017

Current feedback opamps 4/26/2017

Current feedback opamps 4/26/2017