The simulation of influence of main components’ parameters of reference voltage sources on output voltage ; Моделирование влияния параметров основных компонентов источников опорного напряжения на выходное напряжение ; Моделювання впливу параметрів основних компонентів джерел опорної напруги на вихідну напругу

The aim of the research is to develop a model of the reference voltage source that can be modeled the influence of the main structural components’ parameters of reference voltage source on the accuracy and temperature stability of the output voltage. The article analyzes the current state of reference voltage sources in integrated circuits. It was established that reference voltage sources are one of the main blocks of each integrated chip. It was found that requirements are for these sources are the next: they must have low sensitivity to changes in supply voltage, temperature, and deviations of the parameters of the technology process. In this case, the reference voltage sources must operate at a supply voltage equal to or less than 1V to meet modern aspects of the application. A possible approach to the construction of a reference voltage source having a temperature-independent output voltage and capable of operating at a supply voltage equal to or less than 1V is proposed in this article. This solution has the ability to implement in the standard CMOS technology for integrated circuits. An analysis of possible sources of error that degrade the accuracy of the output voltage of the reference voltage source is provided. It was established that the bias voltage of the operational amplifiers has the strongest effect on the accuracy of the output voltage. An idealized model is proposed, which contains ideal resistors and operational amplifiers – the components that most strongly affect the accuracy and stability of the output voltage of the voltage references. An operational amplifier model has been developed that is able to model the input bias current, input bias voltage, input resistance, differential gain, output resistance and frequency response of the operational amplifier. The influence of voltage gain, bandwidth, output resistance of the operational amplifier, input bias voltage on the nominal output voltage and the temperature coefficient are investigated. A regression analysis was performed to display ...