Title :
A folded-cascode switched OTA based on current deviation
Author :
Salinas-Cruz, Roman ; Espinosa-Flores-V, Guillerno
Author_Institution :
Integrated Circuits Design Group, Nat. Instituto Nacional de Astrofisica, Opt. y Electron., Puebla, Mexico
fDate :
6/24/1905 12:00:00 AM
Abstract :
An improved version of a fully differential folded-cascode OTA (operational transconductance amplifier), switched at 16 MHz with a single 3 V supply voltage, is presented. The switching process is performed by current deviation at the OTA output stage, instead of turning off its bias current or interrupting the current path from the power supply. Theoretical results show the relationship between the sampling frequency and the folded-cascode OTA design parameters. Simulated results using HSPICE show that the current through the transistors at the OTA output stage is switched properly.
Keywords :
HF amplifiers; SPICE; circuit simulation; differential amplifiers; operational amplifiers; radiofrequency amplifiers; switching circuits; 16 MHz; 3 V; HSPICE simulations; OTA switching process; bias currents; current deviation based design; folded-cascode OTA design parameters; fully differential folded-cascode switched OTA; operational transconductance amplifier switching speed; output stage current deviation; output stage transistor switching; power supply current path interruption; sampling frequency; single supply voltage; Astrophysics; Frequency; Integrated circuit synthesis; Integrated optics; Low voltage; Operational amplifiers; Power supplies; Sampling methods; Switches; Switching circuits;
Conference_Titel :
Devices, Circuits and Systems, 2002. Proceedings of the Fourth IEEE International Caracas Conference on
Print_ISBN :
0-7803-7380-4
DOI :
10.1109/ICCDCS.2002.1004008
