Electronically linearly voltage controlled second-order harmonic oscillator with multiples of π/4 phase shifts

Simple multiphase second-order oscillator based on special active device, so-called Z-copy Voltage Controlled Current Follower Differential Input Transconductance Amplifier (ZC-VCCFDITA) is present in this contribution. Simple linear control of oscillation frequency by DC voltage is easily possible. Simple automatic gain control circuit (AGC) for amplitude stabilization is also presented. Three output signals have phase difference (multiples of π/4) and amplitude of produced signal is not disturbed by the tuning process. Functionality of proposed application is verified by Spice simulations of newly proposed behavioral model based on commercially available devices that predetermines initial practical features of active element for future design or fabrication.

[1]  A. U. Keskin,et al.  Quadrature Oscillator Using Current Differencing Buffered Amplifiers (CDBA) , 2006 .

[2]  Wai-Kai Chen,et al.  The circuits and filters handbook , 2009 .

[3]  Ahmed M. Soliman,et al.  OTA-C Arbitrary-Phase-Shift Oscillators , 2012, IEEE Transactions on Instrumentation and Measurement.

[4]  Pipat Prommee,et al.  Log-domain all-pass based multiphase sinusoidal oscillator , 2012, 2012 35th International Conference on Telecommunications and Signal Processing (TSP).

[5]  V Riewruja,et al.  Electronically adjustable phase shifter using OTAs , 2010, ICCAS 2010.

[6]  Montree Kumngern,et al.  Electronically tunable multiphase sinusoidal oscillator using translinear current conveyors , 2010 .

[7]  Kamil Vrba,et al.  Realization of Current-Mode KHN-Equivalent Biquad Using Current Follower Transconductance Amplifiers (CFTAs) , 2010, IEICE Trans. Fundam. Electron. Commun. Comput. Sci..

[8]  T. Dostal,et al.  An Additional Approach to Model Current Followers and Amplifiers with Electronically Controllable Parameters from Commercially Available ICs , 2012 .

[9]  U. E. Ayten,et al.  Current and voltage mode multiphase sinusoidal oscillators using CBTAs , 2013 .

[10]  Pipat PROMMEE,et al.  Log-domain All-pass Filter-based Multiphase Sinusoidal Oscillators , 2013 .

[11]  D. Biolek,et al.  Active Elements for Analog Signal Processing: Classification, Review, and New Proposals , 2008 .

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

[13]  R. Sotner,et al.  Voltage Differencing Buffered/Inverted Amplifiers and Their Applications for Signal Generation , 2013 .

[14]  Jan Jerabek,et al.  Precise Electronically Adjustable Oscillator Suitable for Quadrature Signal Generation Employing Active Elements with Current and Voltage Gain Control , 2014, Circuits Syst. Signal Process..

[15]  Jan Jerabek,et al.  Special type of three-phase oscillator using current gain control for amplitude stabilization , 2012 .

[16]  Viera BIOLKOVÁ,et al.  Four-Phase Oscillators Employing Two Active Elements , 2011 .

[17]  Sajal K. Paul,et al.  Single CDTA-Based Current Mode All-Pass Filter and Its Applications , 2011, J. Electr. Comput. Eng..

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

[19]  Roman Sotner,et al.  New Compact VM Four-Phase Oscillator Employing Only Single Z-Copy VDTA and All Grounded Passive Elements , 2013 .

[20]  Costas Psychalinos,et al.  Electronically controlled multiphase sinusoidal oscillators using current amplifiers , 2009, Int. J. Circuit Theory Appl..

[21]  Kamil Vrba,et al.  New resistorless and electronically tunable realization of dual-output VM all-pass filter using VDIBA , 2013 .

[22]  Roman Šotner,et al.  An Example of Easy Synthesis of Active Filter and Oscillator using Signal Flowgraph Modification and Controllable Current Conveyors , 2011 .

[23]  Shahram Minaei,et al.  Novel Voltage-Mode All-Pass Filter Based on Using DVCCs , 2010, Circuits Syst. Signal Process..

[24]  Kamil Vrba,et al.  Single GCFDITA and Grounded Passive Elements Based General Topology for Analog Signal Processing Applications , 2012, ICON 2012.

[25]  Jan Jerabek,et al.  Behavioral model for Z-copy Voltage Controlled Current Follower Differential Input Transconductance Amplifier and its features , 2015, 2015 38th International Conference on Telecommunications and Signal Processing (TSP).

[26]  D. Biolek,et al.  A Simple Current-mode Quadrature Oscillator Using only Single CDTA , 2008 .

[27]  Winai Jaikla,et al.  A Resistor-less Current-mode Quadrature Sinusoidal Oscillator Employing Single CCCDTA and Grounded Capacitors , 2011 .

[28]  Muhammad Taher Abuelma'atti,et al.  A new current-controlled multiphase sinusoidal oscillator using translinear current conveyors , 1998 .

[29]  Supayotin Na Songkla,et al.  Realization of Electronically Tunable Currentmode First-order Allpass Filter and Its Application , 2012 .

[30]  Josef BAJER,et al.  A Simple Current-Mode Quadrature Oscillator Using Single CDTA , 2008 .

[31]  Stephan J. G. Gift The application of all-pass filters in the design of multiphase sinusoidal systems , 2000 .