This paper presents an electronically tunable current/voltage mode universal biquad filter using current controlled current conveyor transconductance amplifiers (CCCCTAs). The proposed filter employs only two CCCCTAs and two grounded capacitors. The proposed filter can simultaneously realize low pass (LP), band pass (BP) and high pass (HP) responses. Realization of band reject (BR) and all pass...

This paper deals with RC active biquad working in the so-called current mode (CM). The design approach uses only three transconductors (OTA) with the minimum necessary number of outputs and with only three passive grounded elements. The proposed filter has simple circuit configuration providing all standard transfer functions such as high-pass (HP), band-pass (BP), low-pass (LP), band-reject (B...

A quality factor (Q) tuning technique for IF and high-Q continuous-time filter biquads is proposed. The method is based on the existing magnitude locked loop Q-tuning technique, but it utilizes a modified version of the continuous-time adaptive least-mean-squares algorithm to improve the attainable precision. The technique is resistant to center frequency tuning errors, and can use an easily ge...

This paper presents concept of universal filter using operational transconductance amplifier (OTA).The 0.18μm CMOS process is used for design and simulation. This OTA has basing current of 50μA with supply voltage ±1.25v. The design and simulation of this OTA is done using CADENCE virtuoso environment with UMC 0.18μm technology file. This paper presents a electronically tunable voltage mode uni...