Sa'ad Muhammad Al-Shahrani

A novel mixed-mode current-conveyor-based filter

A new mixed-mode biquad circuit is presented. The circuit uses six single-output plus-type second-generation current-conveyors (CCII+s), a single dual-output CCII+, two grounded capacitors, eight resistors, at least two of them permanently grounded, and can realize lowpass, highpass, bandpass, notch, lowpass notch, highpass notch and allpass responses from the same topology. The circuit can be driven by voltage or current and its output can be voltage or current. The parameters ω0 and ω0/Q 0 enjoy independent electronic tunability. Simulation results are included.

Novel RC oscillators using the current-feedback operational amplifier

Novel oscillator circuits using the current-feedback operational amplifier (CFOA) are presented. Each circuit uses one CFOA and five passive elements. Some of the circuits enjoy independent control of the frequency and the condition of oscillation. Experimental results are included.

Novel CFOA-based sinusoidal oscillators

Novel CFOA-based sinusoidal oscillator circuits are presented. Two of the proposed circuits enjoy independent control of the frequency of oscillation and the condition of oscillation. Experimental results are included.

Simulation of a mutually coupled circuit using plus-type CCIIs

A new CCII-based circuit for the simulation of mutually coupled circuits is presented. The circuit uses six commercially available plus-type second-generation current conveyors (CCII+s), six resistors and two grounded capacitors. The primary self-inductance, the secondary self-inductance and the mutual inductance can be independently controlled using three different resistors. SPICE simulation results are included.A new CCII-based circuit for the simulation of mutually coupled circuits is presented. The circuit uses six commercially available plus-type second-generation current conveyors (CCII+s), six resistors and two grounded capacitors. The primary self-inductance, the secondary self-inductance and the mutual inductance can be independently controlled using three different resistors. SPICE simulation results are included.

New realizations of CMOS current controlled conveyors with variable current gain and negative input resistance

In this paper two new second-generation current controlled current-conveyors (CCCIIs)-based circuits are proposed. The proposed circuits are variable gain CCCII and CCCII with negative resistance. The design of these circuits is based on a simple CMOS CCCII that has high bandwidth with -3 dB cutoff frequency of 580 MHz. With no signal mirroring used in these configurations, lower harmonic distortion can be achieved. HSPICE simulation results for the proposed circuits are included.

Synthesis of a Novel Low-Component Programmable Sinusoidal Oscillator

A novel circuit is presented for realizing a sinusoidal oscillator. The proposed circuit, developed through a true synthesis approach, uses one current-feedback operational amplifier (CFOA), one operational transconductance amplifier (OTA), three grounded capacitors and one floating resistor. The proposed circuit enjoys several attractive features. Practical results, in excellent agreement with the presented theory, are included.

New CFOA-Based Grounded-Capacitor Single-Element-Controlled Sinusoidal Oscillator

A new grounded-capacitor single-element-controlled CFOA-based sinusoidal oscillator circuit is presented. The circuit exploits to advantage the internal pole of a general CFOA and uses externally connected three resistors and two grounded capacitors. The frequency of oscillation and the condition of oscillation of the proposed circuit can be independently controlled. Experimental results are included.

A Minimum Component Grounded-Capacitor CFOA-Based RC Oscillator

A minimum-component grounded-capacitor single-frequency RC-sinusoidal oscillator circuit using the current feedback operational amplifier (CFOA) is presented. The circuit uses a single CFOA, two resistors, and two grounded capacitors. The circuit enjoys low active and passive sensitivity characteristics.

A Novel CMOS Wideband Auto-tuning Phase Shifter Circuit

A novel auto-tuning phase shifter circuit suitable for integrated circuit implementation is presented. The circuit exhibits simple structure and provides phase shifting over three decades of frequency, 2 kHz - 2 MHz, with a minimal phase error, less than 3.5%. simulation results using 0.5 um CMOS technology and power supply plusmn2V are included.

A Programmable Reference-Voltage Source

A simple circuit for realizing a current(voltage)-controlled reference voltage is presented. The feasibility of obtaining a temperature-insensitive reference voltage is explored. SPICE simulation results are included.