The IUP Journal of Electrical and Electronics Engineering
New Third-Order Quadrature Sinusoidal Oscillator Employing Current Differencing Buffered Amplifiers

Article Details
Pub. Date : Oct, 2022
Product Name : The IUP Journal of Electrical and Electronics Engineering
Product Type : Article
Product Code : IJEEE021022
Author Name : Komal, Ramnish Kumar and K L Pushkar
Availability : YES
Subject/Domain : Engineering
Download Format : PDF Format
No. of Pages : 22



The paper presents a Voltage Mode (VM) Third-Order Quadrature Sinusoidal Oscillator (TOQSO) using Current Differencing Buffered Amplifiers (CDBA). The proposed TOQSO is designed using two CDBAs, four resistors and three Grounded Capacitors (GCs). The circuit is suitable for integrated circuit realization as all the capacitors are grounded. The Condition of Oscillation (CO) and Frequency of Oscillation (FO) of the presented circuit are self-regulating, i.e., CO can be regulated by resistor and capacitor, and the FO can be tuned. Non-ideal analysis is carried out, and the results are compared with ideal ones. Sensitivities of FO with respect to active and passive components are evaluated and found to be less and low Total Harmonic Distortion (THD). The presented configuration has power dissipation 1.01 mW at 0.9 V supply voltages. The feasibility of the presented circuit is validated using CMOS CDBA with supply voltage 0.9 V.


Analog signal processing/signal generation has been the focus of research and development for the past few decades. Usually, this area contains the design of analog active filters, sinusoidal oscillators, quadrature sinusoidal oscillators and higher order oscillators using Active Building Blocks (ABBs) (Biolek, 2008). CDBA is current mode active building block (Acar and Ozoguz, 1999) and is being utilized to implement various circuits like universal filters (Keskin, 2006; and Tangsrirat et al., 2008), inverse filters (Pandey et al., 2013; and Bhagat et al., 2020), gyrators (Toker et al., 2000b), all pass filters (Toker et al., 2000a), inductance simulator (Pathak et al., 2015), analog multiplier (Keskin, 2004), instrumentation amplifier (Gupta et al., 2016), and Quadrature Sinusoidal Oscillators (QSOs) (Bhagat et al., 2021). SOs are getting prominent attention and find numerous


CDBA, Voltage mode, Third-Order Quadrature Sinusoidal Oscillator (TOQSO)