Third-order sinusoidal oscillator using VDTAs and grounded capacitors with amplitude controllability

This paper presents a novel electronically tunable third-order sinusoidal oscillator synthesized from a simple topology, employing current-mode blocks. The circuit is realized using the active element: Current Controlled Conveyors (CCCIIs) and grounded passive components. The new circuit enjoys the advantages of noninteractive electronically tunable frequency of oscillation, use of grounded passive components, and the simultaneous availability of three sinusoidal voltage outputs. Bias current generation scheme is given for the active elements used. The circuit exhibits good high frequency performance. Nonideal and parasitic study has also been carried out. Wide range frequency tuning is shown with the bias current. The proposed theory is verified through extensive PSPICE simulations using 0.25 μm CMOS process parameters.

Download Full-text

Third order quadrature sinusoidal oscillator using single CDCTA

2017 2nd International conferences on Information Technology, Information Systems and Electrical Engineering (ICITISEE) ◽

10.1109/icitisee.2017.8285546 ◽

2017 ◽

Cited By ~ 1

Author(s):

Montree Kumngern ◽

Usa Torteanchai

Keyword(s):

Third Order ◽

Sinusoidal Oscillator

Download Full-text

New Electronically Tunable Third Order Filters and Dual Mode Sinusoidal Oscillator Using VDTAs and Grounded Capacitors

Advances in Technology Innovation ◽

10.46604/aiti.2021.7592 ◽

2021 ◽

Vol 6 (4) ◽

pp. 262-281

Author(s):

Tapas Kumar Paul ◽

Radha Raman Pal

Keyword(s):

Integrated Circuits ◽

Current Mode ◽

Third Order ◽

Sinusoidal Oscillator ◽

Condition Of Oscillation ◽

Low Pass ◽

Component Matching ◽

Band Pass ◽

Transconductance Amplifiers ◽

Electronically Tunable

This study introduces a third order filter and a third order oscillator configuration. Both the circuits use two voltage difference transconductance amplifiers (VDTAs) and three grounded capacitors. By selecting the input and output terminals properly, current mode and transimpedance mode low-pass and band-pass filters can be obtained without component matching conditions. The natural frequency (ω0) can be tuned electronically. The oscillator circuit provides voltage and current outputs explicitly. The condition of oscillation (CO) and the frequency of oscillation (FO) can be adjusted orthogonally and electronically. The workability of the configurations is judged using TSMC CMOS 0.18 μm technology parameter as well as commercially available LM13700 integrated circuits (ICs). The simulation results show that: for ±0.9V power supply, the power consumption is 1.08 mW for both the configurations, while total harmonic distortions (THDs) are less than 2.06% and 2.17% for the filter and oscillator configurations, respectively.

Download Full-text