A universal biquad filter and a quadrature oscillator using only two CDTAs

Author

Ibrahim, Muhammad A.

Source

ZANCO Journal of Pure and Applied Sciences

Publisher

Salahaddin University-Erbil Department of Scientific Publications

Publication Date

2016-06-30

Country of Publication

Iraq

No. of Pages

5

Main Subjects

Electronic engineering

English Abstract

A new configuration for voltage-mode (VM) universal biquad filter using only two current differencing transconductance amplifiers (CDTAs) is proposed.

The new configuration can realize all the five standard types of the filters, namely, low pass (LP), high pass (HP), band pass (BP), band stop (BS), and all pass (AP), from the same topology.

The proposed configuration offers the tunability of the natural angular frequency (R) and quality factor (Q) through the bias currents of the CDTAs.

Moreover, the circuit has low input impedance to facilitate easy cascading without additional buffers.

By a slight modification of the proposed configuration, a new CDTA-based sinusoidal quadrature oscillator can be easily obtained.

The oscillation condition and the oscillation frequency are independently adjustable by adjusting different bias currents of the CDTAs.

PSPICE simulation results have confirmed the practical workability of the new configuration.

Data Type

Conference Papers

Record ID

BIM-787492

• APA
• MLA
• AMA