Modelling the changes of saturation voltages in high-power operational amplifiers

• Autorzy: Stanclik J.
• Języki publikacji: EN

Abstrakty

EN

A modification of the macromodel of operational amplifiers is proposed to icorporate a relationship between saturation voltages and output current. Such modification improves the macromodel accuracy over a wide range of load, power supply voltage and input signal amplitude variations. The modification consists in changing the EMF values of two autonomous sources in the initial macromodel and adding a resistor or a non-linear controlled source, its parameters having been derived from the relevant data sheets by applying the least squares method. A sample modification is shown for a macromodel of the OPA512 high-power operational amplifier, applicable in the PSpice program. Accuracy and applicability of the modified macromodel have been evaluated.

Słowa kluczowe

EN

macromodel; high-power operational amplifier; PSpice program

PL

makromodel; wzmacniacz; program PSpice

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: Electronics and Telecommunications Quarterly
• Rocznik: 2007
• Tom: Vol. 53, No 3
• Strony: 291--298
• Opis fizyczny: Bibliogr. 5 poz., rys., wykr.

Twórcy

autor

Stanclik J.

• Wroclaw University of Technology, Institute of Telecommunications, Teleinformatics and Acoustic, ul. Wybrzeże Wyspiańskiego 27, 50-370 Wrocław,

Bibliografia

• 1. G. R. Boyle, B. M. Cohn, D. O. Pederson, J. E. Solomon: Macromodeling of Integrated Circuit Operational Amplifiers, IEEE J. Solid-State Circuits, 1974, SC-9, pp. 353-364.
• 2. BURR-BROWN IC Data Book - Linear Products 1996. Burr-Brown Corporation, 1996/1997, pp. 3.2.51-3.2.56.
• 3. MicroSim PSpice A/D. Ver. 6.3. Reference Manual. MicroSim Corporation, April 1996.
• 4. J. Stanclik: Accuracy increasing of macromodel for integrated circuit audio power amplifiers, Electronics and Telecommunications Quarterly, 2001, Vol. 47, pp. 463-476.
• 5. J. Stanclik: Modelling the relation between maximum output voltage and output current of operational amplifiers, Electronics and Telecommunications Quarterly, 2004, Vol. 50, pp. 411-427.