Electronically tunable quadrature oscillator using grounded components with current and voltage outputs.

Area of Science:

• Electronics
• Circuit Design
• Signal Processing

Background:

• Quadrature oscillators are crucial for various electronic applications, including communication systems.
• Existing designs often face limitations in tunability and component integration.
• The need for efficient and compact oscillator solutions persists in modern electronics.

Purpose of the Study:

• To introduce a novel electronically tunable quadrature oscillator.
• To demonstrate the use of a single multiple-output current controlled current differencing transconductance amplifier (MO-CCCDTA) and grounded passive components.
• To achieve independent control over oscillation conditions and frequency.

Main Methods:

• The proposed circuit utilizes a single MO-CCCDTA, two grounded capacitors, and one grounded resistor.
• It generates two high-output impedance quadrature current signals and two quadrature voltage signals with a 90° phase difference.
• Mathematical analysis confirms the independent controllability of oscillation condition and frequency.

Main Results:

• The circuit successfully generates quadrature signals with a 90° phase difference.
• Both the oscillation condition and oscillation frequency are independently tunable.
• The employment of only grounded passive components simplifies implementation.

Conclusions:

• The presented electronically tunable quadrature oscillator offers a flexible and efficient solution.
• Its design is well-suited for integrated circuit (IC) implementation due to the use of grounded components.
• This work contributes to the advancement of tunable oscillator circuits for electronic systems.