Title :
A Low Voltage Inverter Based Differential Amplifier for Low Power Switched Capacitor Applications
Author :
Jagadish, D.N. ; Bhat, M.S.
Author_Institution :
Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Mangalore, India
Abstract :
A low voltage and low power inverter based differential amplifier is presented. The input stage is fully differential in operation and the output stage employ class C inverter to enhance the gain. An on-chip body bias improves the slew rate performance. The amplifier is implemented in UMC 90 nm technology. With load capacitance of 100fF, the amplifier delivers DC gain of 81dB and unity gain bandwidth of 33.88MHz at 41° phase margin. For a dual power supply voltage of ±350mV, the quiescent current and power consumption are 2.37μA and 1.66μW respectively. The amplifier achieves a figure of merit of 2117. With the bulk of all the transistors slightly forward biased by a fixed bias potential, the power dissipation of 672nW and figure of merit of 5431 are achieved.
Keywords :
capacitor switching; differential amplifiers; invertors; power transistors; DC gain; UMC 90 nm technology; bandwidth 33.88 MHz; capacitance 100 fF; class C inverter; dual power supply voltage; figure-of-merit; fixed bias potential; gain 81 dB; gain enhancement; load capacitance; low power inverter based differential amplifier; low power switched capacitor applications; low voltage inverter based differential amplifier; on-chip body bias; phase margin; power 672 nW; power consumption; power dissipation; quiescent current; slew rate performance improvement; transistors; unity gain bandwidth; Capacitors; Electric potential; Inverters; MOSFET; Switches; System-on-chip; class C inverter; differential amplifier; inverter based amplifier; on-chip bias; switched capacitor integrator;
Conference_Titel :
Electronic System Design (ISED), 2014 Fifth International Symposium on
Print_ISBN :
978-1-4799-6964-7
DOI :
10.1109/ISED.2014.20
