论文信息 - Transconductance-Mode Gain Controllable First Order Allpass Filter

Transconductance-Mode Gain Controllable First Order Allpass Filter

New first order allpass filter (APF) in transconductance mode, constructed from 1 DDCCTA, 1 resistor and grounded capacitor, is presented. The transconductance gain and phase shift can be independently controlled. High input and high output impedances are achieved which make the circuit to be easily cascaded without additional buffers. The magnitude of output current can be electronically adjusted. The operation of the proposed filter has been verified through simulation results using 0.5um MIETEC CMOS technology which confirm the theoretical analysis.

Montree Kumngern | Winai Jaikla | Piya Supavarasuwat

[1] Sajal K. Paul,et al. Differential Difference Current Conveyor Transconductance Amplifier: A New Analog Building Block for Signal Processing , 2011, J. Electr. Comput. Eng..

[2] Dalibor Biolek,et al. Electronically controlled high input and low output impedance voltage mode multifunction filter with grounded capacitors , 2014 .

[3] Dalibor Biolek,et al. Current mode quadrature oscillator using current differencing transconductance amplifiers (CDTA) , 2006 .

[4] Supawat Lawanwisut,et al. New Gain Controllable Resistor-less Current-mode First Order Allpass Filter and its Application , 2012 .

[5] M. E. Valkenburg,et al. Design of Analog Filters , 2001 .

[6] Worapong Tangsrirat,et al. Single-input four-output voltage-mode universal filter using single DDCCTA , 2013, Microelectron. J..

[7] Pipat PROMMEE,et al. Electronically Tunable Current-mode Multiphase Sinusoidal Oscillator Employing CCCDTA-based Allpass Filters with Only Grounded Passive Elements , 2011 .