Modular SPICE macromodel for operational amplifiers

Advanced High Accuracy Behavioral Spice Macromodel of Operational Amplifier

In the paper an advanced parameterized analog behavioral SPICE macromodel of operational amplifier is proposed. The following parameters and characteristics of voltage feedback operational amplifier are modeled: frequency dependent input and output impedances; differential and common mode gains and power supply rejection ratios with their tolerances, frequency and temperature dependencies; volt...

Precise SPICE macromodel applied to high-voltage power MOSFET

A macromodel for precise SPICE simulations of high-voltage power MOSFET is presented. The macromodel takes into account basic features of these devices as higher value of the resistance between channel and drain and lower current level though the body diode compared to low-voltage power MOSFET. It also considers that high-voltage power MOSFET work mostly in saturation regime. All required param...

Applications of Operational Amplifiers

Dynamic Offset Cancellation Techniques for Operational Amplifiers

At low frequencies, offset, 1/f noise and drift are the dominant error sources of operational amplifiers. This is especially true in CMOS technology. This chapter reviews precision techniques that can be used to achieve low 1/f noise and low offset in operational amplifiers. There are three types of CMOS offset cancellation techniques: trimming, chopping, and auto-zeroing. Trimming is usually p...

Equivalent Gain Analysis for Nonlinear Operational Amplifiers*

For low-voltage, low-power circuit design, the linear model for operational amplifiers is insufficient to accurately predict the static and dynamic behavior of the circuit. This paper introduces a nonlinear model for operational amplifiers based on amplifiers’ DC transfer characteristic. By using this nonlinear model, the behavior of an operational amplifier with feedback network can be describ...