Switched-capacitor(SC) circuits have already been established in audio frequency range. However, SC circuits are not suitable for high frequency filters, because of the necessity of anti-aliasing filters and the limitation of high-frequency characteri...
Switched-capacitor(SC) circuits have already been established in audio frequency range. However, SC circuits are not suitable for high frequency filters, because of the necessity of anti-aliasing filters and the limitation of high-frequency characteristics due to GBW(Gain-Band-Width) products of operational amplifiers. To overcome those disadvantages, a gyrator filtering techniques have been proposed. LC simulation method using gyrators is readily available to abtain low-sensitivity active RC filters.
In this paper, highly linear MOS transconductor with the gain factor controllable by offering offset voltage is presented, and to validate transconductor characteristics, computer simulation using PSPICE was performed. Gyrator circuit is designed using MOS transconductor circuits, and for filter design, floating inductor, floating resistor and grounded resistor which are simulated by gyrator circuits are presented.